The best roof cement in India includes OPC53 grade and PPC cement, brand name Ambuja plus Roof Special Cement, ACC Gold, ACC F2R, Shri Roofon Concrete Master, Ramco Supercrat Cement.
- 0.1 Which cement is best UltraTech or ACC?
- 1 Which is best waterproof cement?
- 2 Is OPC cement good for roof?
- 3 Which is costly PPC or OPC?
- 4 Is UltraTech premium cement good for roof?
- 5 Is UltraTech super cement good for roof?
- 6 Which is better cement 43 or 53?
- 7 Who is the No 1 cement?
- 8 What is premium cement?
- 9 Which cement is long lasting?
- 10 Is 53 grade cement good for roof?
Which cement is best for roof slab?
The Best Cement for Concrete Slab for roof Dalai and all types of RCC structures such as footing, slab, beam, and column is OPC 53 grade and PPC (Portland pozzolana cement).
Which cement is best for roof OPC or PPC?
2.Portland Pozzolana Cement (PPC): – PPC cement is generally used for plastering, brick masonry and waterproofing works. PPC has a lower heat of hydration and it is prone to fewer cracks compared to OPC. PPC has lower strength than OPC but PPC provides better workability and finishing than OPC. PPC provides greater resistance to chemicals.
Which UltraTech Cement is best for roof?
Which Cement is Best for House Construction? UltraTech March 25, 2019 The process of building a home typically includes many stages and in most of these stages, your choice of cement will play a crucial role. There are three main types of cement for constructing a home – OPC, PPC and PSC.
Among the three, you will find OPC is available almost everywhere, but PPC and will give better strength and excellent durability. Before purchasing the cement, make sure to check the manufacturing date. If the cement bag is older than 90 days, you should consult your engineer. You will find the manufacturing date, along with other important details like the MRP and the ISI stamp, printed on the side of the bag.
Make sure to inspect the cement bag for lumps as this makes the cement unsuitable for construction. In trying to pick the right cement, don’t be influenced by price alone. In an attempt to bargain and save money in the short-run, you risk paying a big price in the long-run.
Which cement is best UltraTech or ACC?
So it is no surprise that India is the second most populous country in the world as well as the second largest producer of cement. According to the Cement Manufacturers Association, India’s total installed capacity is 540 million tonnes. The top five players control half of the country’s production.
In today’s article we Compare and differentiate the two top cement players, UltraTech Cement and Acc. The idea is to study their past, eliminate risks and profit from their future. background ACC: ACC is one of the oldest cement companies in India with a rich history. It was purchased in 2004 by the Swiss based Holcim Group, the world leader in cement.
It has a total installed capacity of 30m tonnes and an annual output of mt. ACC has a market share of 10% in India. UltraTech Cement: Over the past decade, UltraTech Cement has evolved from organic and inorganic forms. It has almost doubled its capacity to 100m tonnes.
- The company has a market share of 25 per cent.
- The Aditya Birla Group cement giant grew aggressively after absorbing Grasim’s cement business in 2010.
- This made it the largest cement company in India.
- Both ACC and UltraTech Cement operate cement plants in all regions of India.
- Now this augurs well for a cement company.
The logic behind this is simple. It is not economical to transport cement remotely. This makes the business quite regional. Exposure to a single market makes a company vulnerable to price fluctuations in that sector. But ACC and UltraTech, unlike their smaller peers, operate plants in multiple regions. Construction activity across the country is the primary driver for any increase in cement demand. This includes not only housing projects in urban and rural areas (65% of the total demand for cement), but also infrastructure activities such as construction of roads, bridges, highways, metros, etc. (the remaining 35%). increase in revenue see full image Source: Equitymaster UltraTech’s 5-year compound annual growth (CAGR) revenue has tripled compared to ACC. The drive comes on the back of massive capacity expansion coupled with huge demand for housing and infrastructure projects across the country. profitability see full image Source: Equitymaster A cement company’s profitability is best reflected in its earnings before interest depreciation tax (EBIDTA per tonne) per tonne. Simply put, it is the profit from core operations (before interest and depreciation) on each tonne of cement sold by the company.
A high level of profitability is usually the result of two things; Either the company operates in highly profitable sectors or it maintains tight control over its costs. While UltraTech and ACC enjoy captive resources for raw materials and power supply, ACC’s operating costs have always been high. The primary reason is its old plant and machinery.
These often require unexpected maintenance. This affects the operating profit of the company. In contrast, UltraTech’s plant and machinery is relatively new, which is driving it. Furthermore, both the companies are equally adept at reining in their costs.
Even though ACC operates plants across the country, a major part of its cement plants are in the southern region of India. Due to excess cement capacity in South India, the supply-demand dynamics there have been generally unfavourable for cement producers. For ACC, this southern exposure in conjunction with an uncertain cost structure has impacted the company’s profitability.
Dividend Dividend is the income that an investor can earn from shares in addition to the increase in the value of the stock. Due to the capital intensive nature of the business, cement companies are not dividend payers. This is reflected in the five-year average dividend yields for ACC Cement and UltraTech Cement: 0.6% and 0.5%, respectively. see full image Source: Equitymaster This ratio measures the level of debt a company takes on to finance its operations or expansion against the level of equity available. Generally, a favorable debt-to-equity ratio is less than 1.0, while a risky debt-to-equity ratio is greater than 2.0.
While ACC enjoys debt-free status, UltraTech has borrowed funds for its massive expansion over the past decade. But assuming that it has been less than 1 and is falling, it does not raise a red flag. Return on Capital Employed (ROCE) Return on capital employed is one of the most meaningful indicators of a company’s profitability and efficiency.
It is an excellent tool for analyzing the returns of a capital intensive industry like cement. It tells you what a company generates on the total capital it invests (shareholders’ equity plus borrowed funds). see full image Source: Equitymaster The 5-year average for ACC is higher than for UltraTech. While this usually means that the ACC is generating higher returns by efficiently employing its capital, in this case, it may be different. UltraTech’s new capacity addition is yet to generate substantial profits, affecting its return on capital employed at present.
But over the next few years, as new capacity becomes profitable and reduces the amount of money borrowed, this number must increase. Evaluation The most common and effective ratios for comparative analysis and valuation are the price-to-earnings (PE) and price-to-book (PB) value ratios. The PE ratio uses a company’s earnings to determine the rupee value of a shareholder’s earnings.
The PB ratio uses a company’s book value to determine this. see full image Source: Equitymaster The PE and Pb ratios for ACC are 20.4 and 3.2, respectively. The average for the last 10 years is 25.9 and 2.9 respectively. PE and PB for UltraTech Cement stood at 31.5 and 4.6, respectively. The ten year averages are 32.4 and 3.8 respectively.
Both companies are trading at a premium to their 10-year averages, indicating that the shares are currently priced higher. sustainability efforts Climate change is one of the most serious issues facing humanity today. Governments around the world are grappling with the issue, forcing companies to become more environmentally friendly.
An important step in this direction for companies is to reduce their carbon emissions. Carbon emissions in cement companies are measured in terms of kilograms per ton of cemented material. Both ACC and UltraTech stand at 493 kg per tonne and 462 kg per tonne of cemented material.
Most of the carbon emissions associated with cement occur during production which is resolved using alternative components such as fly ash and slag. Getting energy from renewable sources is another helpful step towards sustainability.13% of UltraTech’s energy requirement is met through renewable energy capacity, while 4% of ACC’s energy requirement is met through renewable energy capacity.
UltraTech is 3.9 times water positive, meaning they return 3.9 times the amount of water to the community. The ACC is currently 1.1 times and is targeted to be 5 times by 2030. bright prospects Despite being the second largest cement producer in the world, India’s cement consumption per capita is 235 kg.
- This number is lower than the global average of more than 500 kilograms per capita.
- So there is a lot of room for growth going forward.
- The cement industry has witnessed massive capacity expansion over the past decade while the demand for cement remains sluggish.
- Historically, the ratio of growth in cement demand to GDP growth has been around 1.2x.
But due to slowdown in infrastructure projects, this ratio has been much lower than the previous average. Despite this excess supply, margins have not declined significantly. This is due to consolidation in the industry. The top 5 players control about 50% of the market.
- This number is much higher at the regional level.
- However, with the rise in small and medium-sized cement players, the industry leaders are likely to lose their bargaining power.
- Equitymaster’s opinion We reached out to Tanushree Banerjee, co-head of research at Equitymaster, for her views on cement companies.
Here’s what he had to say Though cement companies have benefited from a quick recovery in the realty sector, cost pressures have kept their margins weak for some time. Cement companies may see some margin pick-up in the next few quarters due to easing of cost pressures.
At the same time, cement companies in India continue to be strong beneficiaries of megatrends in infrastructure and corporate capex. ACC or UltraTech: which is better? ACC is working with its parent company Ambuja Cement to maximize its production capacity and benefit from operational and financial synergies.
But it remains to be seen how beneficial these measures will be. Recording strong revenue and production growth along with high operating margins, UltraTech has been operating more efficiently than it has been in years. After massive expansion, UltraTech Cement is better positioned to capitalize on the growing demand as compared to its peers.
But with the recent rally in stock prices in the cement sector, both the companies seem to be overvalued. Before choosing a stock to invest in, take a look at each of the company’s fundamentals and valuations. They help in deciding which company is better for investment. Still confused which one is better? Use our feature-rich comparison tool to make a detailed comparison between any two companies.
The tool also includes a graphical analysis to make it easy for you to spot trends! ACC Vs UltraTech Cement As the cement sector stocks you are interested in, check out Equitymaster’s powerful Indian stock screener tool to find out the top cement companies in india, Disclaimer: This article is for informational purposes only.
Which is best waterproof cement?
UltraTech Weather Pro WP+200 – Dampness can enter from anywhere – roof, foundation, walls or even bathrooms. UltraTech Weather Pro WP+200 is an integral waterproofing liquid developed at UltraTech Research Lab. Use WP+200 with cement, to provide superior waterproofing protection to every part of your home.
Is OPC cement good for roof?
PPC has a low setting time, compared to OPC but it hardens over a period of time, with proper curing. Because of its higher heat hydration nature, it requires special care. Ordinary Portland cement (OPC) from brands like Double Bull Cement, is widely used as they happen to be one of the best cement brands in India.
Can we use PPC cement for roof?
PSC is a blended cement. This is manufactured using slag coming out of steel plants. PSC can be used in all types of construction including roofing. Hope this helps.
Which is costly PPC or OPC?
OPC and PPC cement Cost in India The cost of the products of PPC Cement varies between Rs 340 to Rs 370 for every bag from Jun 2021 to May 2022. The OPC cost is approximately 300 rupees for every bag and it is quite expensive in comparison to OPC. In PPC, the expensive clinker is used instead of pozzolanic material like fly ash. Finally, the price of PPC is less than that of OPC.
Is UltraTech Cement PPC or OPC?
Cement Product (OPC, PPC, PSC, PCC) UltraTech Cement Limited is the ultimate 360° building materials destination providing host of products & services from foundation to finish. UltraTech’s array of products range from grey cement to white cement, from building products to building solutions and an assortment of ready-mix concretes with special value-added concretes catering to the varied needs and applications.
Ordinary Portland Cement (OPC) Ordinary Portland Cement (simply called cement / OPC) refers to the hydraulic binding material produced by intimate grinding of high-quality Portland cement clinker and appropriate amount of high purity gypsum. OPC is the most commonly used cement for a wide range of applications.
UltraTech OPC has been used in various types of constructions like reinforced cement concrete, pre-cast, prestressed concrete structures and slipform construction. It has applications in monumental structures, high-rise towers, skyscrapers, and towers.
- It is also used in large infrastructures like Canals, Bunkers, chimneys, water retaining structures & Bridges.
- UltraTech is the primary supplier of cement for several major new infrastructural projects in India.
- Portland Pozzolana Cement (PPC) Portland Pozzolana cement is a blended cement produced in UltraTech’s state-of-the-art manufacturing facilities with carefully selected premium ingredients either by intimately blending ordinary Portland cement with high reactive pozzolanic materials such as fly ash or calcined clay or intimate intergrinding of high-quality Portland cement clinker with specified quantities of high purity gypsum and high reactive pozzolanic materials such as fly ash or calcined clay.
Pozzolanas by themselves have latent cementitious properties which reacts with calcium hydroxide in the presence of moisture at normal temperature to form compounds having cementitious properties. The concrete produced by using Portland Pozzolana cement has high ultimate strength, is more durable, resists wet cracking, thermal cracking and has a high degree of cohesion and workability in concrete and mortar.
Portland Slag Cement (PSC) Portland Slag Cement is a blended cement, produced in UltraTech’s state-of-the-art manufacturing facilities with carefully selected premium ingredients either by intimately blending ordinary Portland cement with ground granulated blast furnace slag or intimate intergrinding of high-quality Portland cement clinker with specified quantities of high purity gypsum and granulated slag.
This cement produces exceptionally strong as well as durable concrete. UltraTech Portland Slag Cement can be used for varied building construction processes which include all types of reinforced concrete structures, masonry and plaster works. UltraTech Portland Slag Cement is also extensively used for mass concrete applications like large foundations, dams, concrete roads among others.
Is UltraTech premium cement good for roof?
UltraTech Premium – UltraTech Premium is a concrete special cement, produced in UltraTech’s state-of-the-art manufacturing facilities with carefully selected premium ingredients to deliver to the customer cement that produces both exceptionally strong as well as exceptionally durable concrete.
Quality assurance is an integral part of UltraTech’s manufacturing philosophy. The quality attributes of UltraTech Premium are consistently ensured through rigorous application of advanced technology, constant quality monitoring with high precision equipment and adherence to ISO certified systems and procedures.
UltraTech Premium’s composition comprising high quality clinker blended with judicious amounts of superior blast furnace slag having high glass content, gypsum devoid of deleterious materials and optimum PSD (Particle Size Distribution) ensures its unsurpassable performance year on year.
UltraTech Premium Cement can be used for varied building construction processes which include all types of PCC, masonry and plaster works. UltraTech Premium is also extensively used for mass applications like large foundations, dams, concrete roads among others. It is ideal for RCC in marine and aggressive environments due to its superior resistance to attack of sulphates and chlorides.
It can be used for structures below the ground and for those that are in contact with water. UltraTech Premium, with superior 28-day compressive strength, forms an ideal solution for critical applications such as slabs, columns, beams and roofs. UltraTech Premium is packaged in classy, polypropylene laminated box shaped bags, which are tamper proof and can withstand the toughest of handling.
Is UltraTech super cement good for roof?
The best solution for protecting your home against water seepage in the long run, is waterproofing. Waterproofing is critical in the following areas of your home: – The bathrooms and kitchen as water is constantly used in these areas. The water tank in case it’s located on the roof. If there is a leak, water can seep in through the roof. Areas that are directly exposed to the elements like the roof, balcony and all outer walls and adjacent inner walls.
The basement since it’s in direct contact with the Earth and moisture from the ground. When it comes to waterproofing, UltraTech has a range of products like: It uses high-quality polymer additives and is ideal for terraces, roofs, water tanks and balconies. It is most suitable for areas that are less than 10,000 sq.
ft. It enhances the compressive strength and water tightness of concrete during construction It is similar to Flex in terms of properties and applications though it is ideal for areas greater than 10,000 sq. ft. : 4 Advantages of Waterproofing Your Home | UltraTech
Which is better cement 43 or 53?
OPC 53 sets quicker than OPC 43 and has a quite low initial setting time. It is used in structures where rapid strength gain is required like large load bearing structures like bridges, huge buildings, etc. OPC 43 on the other hand doesn’t set so quickly and has a normal initial and final setting time.
Who is the No 1 cement?
#1 Ultratech Cement – Market Cap.: Rs.1,71,000 Cr. Capacity: 119.95 million tonnes per annum (MTPA) Part of Aditya Birla Group, is the largest cement company in India and one of the largest cement manufacturers in the world. The Mumbai-based company produces grey cement, ready-mix concrete (RMC), and white cement.
The company has a consolidated capacity of 119.95 million tonnes per annum (MTPA) of grey cement catering to the needs of international markets such as UAE, Sri Lanka and Bahrain. UltraTech is the largest manufacturer of grey cement and ready-mix concrete (RMC) and one of the largest manufacturers of white cement in India.
The firm is a founding member of the Global Cement & Concrete Association. The Indian concrete major is a signatory to the and hence shares the 2050 net-zero emissions goal on the Net Zero Concrete Roadmap announced by GCCA. UltraTech is the first company in India and the second company in Asia to issue dollar-based sustainability linked bonds.
The firm also adopted tools like the Science-Based Targets Initiative (SBTi) and Internal Carbon Price as well as set ambitious environmental targets through both EP100 and RE100. The cement producer has a power generation capacity of 156 MW through waste heat recovery systems. The waste heat recovery capacity is expected to reach 302 MW by FY2024.
Further, over 80% of its power consumption is met through captive power plants, most run on fossil fuels. In the area of renewable energy, the firm professes plans to invest in solar power generation for captive usage. This is in addition to existing contract capacity of 148 MW renewable energy plants.
What is India No 1 cement?
UltraTech Cement The Engineer’s Choice: India’s No 1 Cement.
What is premium cement?
Portland cement is made by fusing together at high temperatures a precisely controlled blend of very finely ground limestone and shale to form cement clinker. A small quantity of gypsum is added to this clinker before grinding to produce the final fine powder – Premium Cement.
Which cement is long lasting?
How do I Choose the Best Cement for Construction? – Dalmia Cement Just like bricks are the building blocks of any home, cement is the bonding agent that puts everything together. Without cement, modern construction is near impossible- certainly you already know that. Cement Grade Cement grades describe the compression strength of Ordinary Portland Cement, or OPC. A higher cement grade means higher compression strength and a higher compression strength means the increased ability of the structure to withstand more weight and tackle erosion.
OPC is available in three grades- 53 Grade, 43 Grade, and 33 Grade. However, for long-lasting construction, blended cement variants such as Portland Pozzolana Cement (PPC), Portland Slag Cement (PSC) and/or Composite Cement (CC) should be preferred as they offer increased durability and resistance to various elements affecting construction quality.
Good cement manufacturers provide equivalent strength compared to OPC in their blended cement. That said, do not look for grades on blended cement varieties since they operate on different parameters compared to OPC. Types of Cement Cement companies produce different types of cement for different construction jobs.
OPC: OPC stands for Ordinary Portland Cement. This is a traditional choice for construction in India. This cement has an early setting time, is relatively costlier and is less environment-friendly compared to other blended cements.
PPC: PPC stands for Portland Pozzolana Cement. This is a fly ash-based cement that has a slightly longer setting time but is as strong as OPC cement. This is a more environment friendly and pocket friendly option as compared to the other cement types. This cement is preferred in the construction of buildings in harsh environmental conditions due to PPC properties contribution to concrete in preventing water seepage and damage.
PSC: PSC stands for Portland Slag Cement. This is a blended cement that has a low tendency to crack due to its tendency to generate lower heat during hydration. This results in less water consumption as well as easier curing. This cement is most suitable for constructions exposed to a marine environment.
Composite Cement: An optimum blend of high reactive silica and slag, it offers higher long-term strength gain and better workability i.e. can be easily mixed during concreting. It is ideal for all construction applications.
Cement Quality In a marketplace where there are so many companies that sell cement, it becomes hard to make the right choice. A good rule of thumb is to sure about the cement quality is to buy from a well-reputed brand. A company with a good reputation in the market along with years of experience often provide the ideal cement products.
These brands create products that are in line with their goodwill and often provide top-notch products with good value for money. Packaging Packaging is also an important part as cement tends to decay in quality if not stored properly. A company that provides good packaging that is moisture-resistant and tamper-proof is the right choice for you.
Availability and logistics The last but equally important part in the quest for the is availability and logistics. Cement is not a small or light item that can be carried easily from any distance. Cement delivery to the construction site is an important factor to consider for the consumer.
The availability of the required cement at a nearby dealer and its timely delivery ease the construction process as well as helps in cutting down costs. Do find out brands and variants available at your nearest dealer, their price and frequent availability before you choose that brand. Selecting the for construction can be a hectic job if you’re not aware of the basics.
Keeping the above-mentioned points in mind, you can make an informed choice and select what suits best to your needs. However, if you are still not clear, avail the facility of Dalmia Build Advisor. As the name suggests, experts from the team will guide you to pick the cement best suited for you and will help understand the nitty-gritty of everything about your dream home’s construction.
Which cement is good for hot weather?
Hot Weather Concreting Posted at 12:58h in by Durability of concrete structures are being widely discussed and deliberated across the globe amongst civil engineering fraternity in the last few decades. The costs towards repair and rehabilitation of concrete structures have been found to be in such high magnitude that the needs to construct durable structures have become imperative. Concrete/cementitious products have a similarity to Human beings in the sense that how a new born baby is being taken care so much by means of timely vaccinations and other protection measures during the first few years after birth, the same applies to taking care of the structures built of concrete / cement mortar during the initial hours/days after they are cast in the structure. In my experience in cement/ready mix concrete industry in South India last 19 years I have been seeing Plastic Shrinkage cracks in concrete being reported from lots of projects especially during the last decade or so. Hence the need to understand HOT WEATHER CONCRETING especially with respect to tropical and dry regions of our country. Hot weather may be defined as any period of high temperature in which special precautions need to be taken to ensure proper handling, placing, finishing and curing of concrete. Hot weather problems are mostly encountered in the summer but the associated climatic factors of high winds, relative humidity and solar radiation can occur at any time, especially in arid or tropical climates. Hot weather conditions can produce a rapid rate of evaporation of moisture from the surface of the concrete and accelerate setting time etc. Generally, high humidity tends to reduce the effects of hot weather in concreting. But then, what is hot weather concreting? The definition may vary from country to country. As per BUREAU OF INDIAN STANDARDS IS:7861(Part I), ” Any operation of concreting done at atmospheric temperatures above 40 degree Celsius or any operation of concreting ( other than steam curing) where the temperature of concrete at time of its placement is expected to be beyond 40 degree Celsius is termed as HOT WEATHER CONCRETING “. We need to understand, foremost, the effect of hot weather on concrete, in the absence of special precautions, than concreting done at normal temperatures. The principal general effects of hot weather concreting are as follows: Accelerated setting: Cement Hydration results in setting and hardening of concrete. High temperature increases the hydration of cement resulting in faster setting which means the time available for workability (concrete in plastic state) of concrete is reduced. Hydration of cement also releases heat. Hence, faster the cement hydration faster the heat generation and this increases concrete temperature, further speeding up the cement hydration or setting. While initial strength may not suffer, the long term strength (> 28 days strength) is affected. This is the reason why hot weather concreting needs special care especially on finishing and curing of concrete. Reduction in strength: High temperatures necessitates addition of water at project site to enhance the workability of concrete and thereby reduction in concrete strength. It may also results in formation of cold joints in the structure cast.
- Increased tendency to cracks: High temperatures, High wind velocity and low relative humidity can affect fresh concrete in two important ways: first, the high rate of evaporation may induce early plastic shrinkage cracks or cracks may be developed in the hardened concrete either by increased drying shrinkage resulting from greater mixing water used or by cooling of the concrete from its elevated initial temperature and secondly, the evaporation rate can remove surface water necessary for hydration and unless necessary curing practices done it may affect the cement hydration process in the initial stages resulting in lower concrete strengths.
- Thermal cracking also may result from rapid drops in the temperature of the concrete, from hot weather during concreting and the night cooler temperature.
- How to concrete in HOT WEATHER?
- The Key to successful hot weather concreting is:
- Recognition and understanding the factors that affect the concrete.
- Planning and necessary precautions to minimize their effects.
We will now see some useful measures that need to be taken during hot weather concreting without compromising important parameters such as workability, strength, crack-free surface etc for better performance in the long run i.e. high durable concrete structures.
- The first immediate solution for concreting in arid and hot weather /low humid regions is to pour concrete during early morning or late evening.
- This may mitigate the bad effects to a large extent.
- In case, if the concreting pour has to be done during the day, other precautionary measures as below could be undertaken for better results.
The foremost amongst the possible measures are to lower the temperature of the concrete ingredients before they are used for concrete mixing. Primarily, in case of cement, High early strength cements to be avoided unless initial high strength of concrete is required at site.
In that case, it is advisable to use cementitious materials like flyash/slag to reduce the heat of hydration. But it is highly recommended to use BLENDED CEMENTS like Portland Pozzolana Cement (PPC) / Portland Slag Cement (PSC) in such cases not only from hot weather concrete point of view but also from overall DURABILITY OF CONCRETE STRUCTURES.
Aggregates may be protected from direct rays of the sun during concrete production by providing shades over the stockpiles. Sprinkling the stockpiles of coarse aggregates with water and keeping them moist is another option to be considered. Only precaution to be taken care is not to flood them so as to affect the moisture content considered during concrete mix design.
The mixing water has the greatest effect on temperature of concrete, since it has a specific heat of about 4 to 4.5 times that of cement or aggregate. Hence chilled water or ice is preferred during concreting at high temperatures. If at all ice is added to the mixing plant directly, it is added in the crushed state only and complete melting is to be ensured before mixing of concrete ingredients is complete.
In Hot weather condition the mix sets quicker and looses workability of slump faster due to rapid hydration and evaporation of water from the mix. This makes placing, compaction and finishing of concrete quite difficult leading to deterioration in the quality of concrete.
Addition of water to maintain workability / slump leads to drop in concrete strength. Use of chemical admixtures like water reducers / retarders helps in delaying the setting of concrete. These are used in lots of projects these days in India and worldwide (Arid and tropical climates). However, use of these chemical admixtures need to be carefully done as per manufacturers specifications and expert engineers advice.
We need to plan adequate manpower and machineries to complete the concrete pour at the shortest time possible during hot weather. The effect of mixer machine surface as well as transporting trucks exposed to the hot sun should be minimized by painting white or lighter colour and covered with wet burlaps to minimize the radiation effects.
Also, it is advisable to minimize the time between water added during concrete mix and concrete pour to the minimum possible to negate the workability loss etc. The next important precautions to be taken are in PLACEMENT, FINISHING AND CURING of concrete during hot weather. Forms, Reinforcement and Sub-grade shall be sprinkled with cool water JUST prior to placement of concrete.
Speed of placement and finishing helps to minimize problems in hot water concreting. Since hot weather leads to rapid drying of concrete, protection and curing has to be started immediately after surface is hardened enough. This can be in the form of covering the concrete surface with wet burlap, curing compounds or sprinkling of water initially.
- RMC’s in South India have found brooming of concrete and sprinkling of water immediately to be suitable practical solution in case plastic shrinkage cracks have been observed within couple of hours after concrete pour.
- Finally, once concrete cubes are casted for testing of the concrete for compressive strengths, adequate protection to be made for cube specimens from being exposed to direct sunlight or else evaporation of water in the cube will lead to lower compressive strength reported when tested for 7 days and 28 days.
- To summarize, adequate measures at every step involved in concreting from material storage, concrete mixing, transportation, placing, finishing, curing and concrete cube casting as mentioned above to be undertaken if done during HOT WEATHER for better and durable concrete.
- Penna Cement is one of the ‘s practicing the concrete mixing and cement manufacturing processes to produce the best cement grades for construction distributing and providing across cement dealers in New Delhi, Pune, Mumbai, Hyderabad, Chennai, Bangalore, Maharastra, Andhra Pradesh, Kerala with a great cement manufacturing footprint in South, North, East and West regions of India.
: Hot Weather Concreting
Is 53 grade cement good for roof?
Which Is the Best 53 Grade Cement in India? – Use of OPC 53 grade and PPC ( Portland pozzolana cement) is the best cement for roof dhalai and for all type of RCC structure like footing,slab, beam and column.
Is OPC cement waterproof?
Ultratech Opc 43 Grade Cement
|Features||Fire Resistant, Rapid Hardening, Waterproof|
|Packaging Type||Sack Bag,Bag|
|Packaging Size||50 kg|
|Is It Leak Proof||Leak Proof|
|Type||OPC (Ordinary Portland Cement)|
|Water Proof||India No 1 Water Proof cement|
|Packing Size||50 Kg|
|Cement Grade||Grade 43|
Product details: Ordinary Portland cement (OPC) is the most commonly used cement for a wide range of applications. These applications cover ordinary, standard, high strength concretes, masonry and plastering works, precast concrete products for e.g., blocks, pipes etc., and specialized works such as precast and prestressed concrete.
|Delivery Time||same day|
|Payment Terms||T/T (Bank Transfer)/D/P/D/A/cash|
Interested in this product? Get Latest Price from the seller Contact Seller
Which cement is cheaper OPC or PPC?
Difference Between OPC and PPC Cement – The main differences in their characteristics and uses are –
Portland Pozzolana Cement is a variation of Ordinary Portland Cement. Pozzolana materials namely fly ash, volcanic ash, are added to the OPC so that it becomes PPC. Pozzolana materials are added to the cement in the ratio of 15% to 35% by weight.Both are ecofriendly materials but Pozzolana Cement uses natural and industrial waste thus reducing the environmental pollution.
|It has higher strength than PPC in the initial stage.||The strength of PPC is good than OPC in long terms.|
|It has high heat of hydration making it unfavorable for mass concreting.||The hydration process is slower than OPC resulting low heat of hydration. Therefore, it is suitable for mass concreting.|
|The presence of sulphates, alkalies, chlorides, etc. is higher and less resistant than PPC.||It has low percentage of sulphate alkalis, chlorides, magnesia and free lime in its composition, which makes the concrete durable.|
|OPC is not favorable in aggressive weather.||Show greater resistance to aggressive weather.|
|OPC cement are available in three grades, such as 33 Grade, 43 Grade, 53 Grade||PPC is available in any specific grades.|
|It is slightly costlier than PPC.||Cheaper than OPC.|
Conclusion: Both OPC and PPC are commonly used cements in construction. These days, PPC is used as a substitute of OPC. PPC is a variation of OPC which adds a mixture of a pozzolanic material that helps to enhance the strength of the concrete. PPC also brings down the amount of OPC requirement in making concrete.
Which is better cement 43 or 53?
OPC 53 sets quicker than OPC 43 and has a quite low initial setting time. It is used in structures where rapid strength gain is required like large load bearing structures like bridges, huge buildings, etc. OPC 43 on the other hand doesn’t set so quickly and has a normal initial and final setting time.
What type of cement is used for slabs?
Conclusion – Both Ordinary Portland Cement and Pozzolana Portland Cement are suitable cement types you can use to construct concrete slabs. The key is to get the mixture right, i.e., to add the right amount of cement and water. Both Ordinary Portland and Pozzolana Portland cement provide the appropriate strength to concrete slabs to withstand heavy loads.
Which is better 43 or 53 grade cement?
OPC 53 grade cement has better quality, strength, and less setting time compared to 33 and 43 grades of cement. Due to its high strength, is used for making concrete of higher grade (Above M20).
Can we use 43 grade cement for slab?
Can We Use 43 Grade Cement for Slab? – Unless a project requires very high strength cement, the use of 43 Grade OPC is generally recommended in general civil construction work such as residential, commercial and industrial structures. It is used in RCC works, preferably where the grade of concrete is up to M-30.