Deccan Cements Limited (DCL) opc,Ordinary Portland Cement (OPC) OPC is the most commonly used type of cement in the world. OPC is the basic form of cement produced by inter-grinding cement clinker with 3-5% gypsum – which is introduced to enhance the setting time of the cement to a workable 30 minutes or so.
- Bureau of Indian Standards (BIS) has classified OPC into 3 different grades namely, OPC 33 Grade, OPC 43 Grade and OPC 53 Grade cements.
- The grade number indicates the minimum compressive strength that the cement is required to attain at the end of 28 days eg., the minimum compressive strength of 53 Grade OPC attained on the 28th day shall not be less than 53 MPa or 530 kg/sqcm.
It may be noted that OPC 33, OPC 43 and OPC 53 grades do not differ in chemical content. The only difference is that the higher grade cements are ground much finer during the final grinding process, creating a product that is much stronger and more durable than the less finely ground cement.
- 1 How many grades are available in ordinary portland cement?
- 2 What is Type 2 portland cement?
- 3 What is OPC 53 grade cement?
- 4 How many grades of cement are available in Nepal?
How many grades are available in ordinary portland cement?
22.214.171.124 Types of cement – OPC : OPC is by far the most common cement used in India. Depending upon the 28 days strength of the cement mortar cubes, as per IS 4031-1988, OPC is classified into three grades, namely 33, 43, and 53 grades. It is expected that for a particular grade of cement the test results of the mortar cubes do not fall below the specified value.
Rapid hardening cement (IS 8041-1990) : Rapid hardening cement starts gaining strength and develops strength at the age of 3 days that OPC achieves in 7 days. Higher fineness of grinding and higher C3S and lower percentage of C2S increase the rate of development of strength. Extra rapid hardening cement : When calcium chloride (up to 2%) is intergraded with rapid hardening Portland cement (PC), extra rapid hardening cement is produced.
Although the strength of extra rapid hardening cement is about one-fourth higher than that of rapid hardening cement at 1 or 2 days and 10%–20% higher at 7 days, it is almost the same at 90 days. Sulfate resisting cement (IS 12330-1988) : During OPC production when tricalcium aluminate (C 3 A) is added restricting it to the lowest permissible value, it results in sulfate resisting cement.
It also has low C4AF content. Use of this type of cement is more beneficial for structural elements in contact with soils and ground water, where there is significant presence of sulfates, seawater, or exposure to the sea coast. Portland slag cement (PSC) (IS 455-1989) : PSC is produced by intimate interground mixing in suitable proportions of PC clinker, gypsum, and granulated blast furnace slag with permitted additives.
Except for slowness in hydration during the first 28 days, other attributes of this cement are similar to OPC. Therefore it can be employed for mass concreting. It has very low diffusivity to chloride ions and therefore has better resistance to corrosion of steel reinforcements.
- Quick setting cement : At the time of clinker grinding, reducing gypsum content produces quick setting cement.
- This cement can reduce the pumping time, making it more cost-effective.
- Super sulfated cement (IS 6909-1990) : This is a hydraulic cement produced by intergrinding or intimate blending mixture of granulated blast furnace slag, calcium sulfate, and a small amount of PC or PC clinker or any other lime in the proportions of 80–85:10–15:5, respectively.
IS:6909-1990 (reaffirmed 2016) provides more details. Low heat cement (IS 12600-1989) : This type of cement has low heat of hydration and displays a slow rate of gain of strength. However, the ultimate strength is the same as that of OPC. The cement is produced by intimately mixing together calcareous and argillaceous and/or other silica-, alumina-, or iron oxide-bearing materials burnt at clinkering temperature and grinding them.
Hydrophobic cement (IS 8043-1991) : Hydrophobic cement is obtained by intimately mixing together calcareous and argillaceous and-or other silica-, alumina- or iron oxide-bearing materials burnt at clinkering temperature and grinding them with natural or chemical gypsum with a small amount (say 0.1%–0.5%) of hydrophobic agent, forming a film which is water-repellant around each cement grain.
The film is broken out when the mixing together of cement and aggregate breaks the film. This exposes the cement particles for normal hydration. The film-forming water-repellant material is expected to improve workability and also protect from deterioration due to moisture during storage and transportation.
Masonry cement (IS 3466: 1988) : Masonry cement is made by intimate grinding and mixing of PC clinker and gypsum with pozzolanic or inert materials and in suitable proportions air entraining plasticizer resulting normally in fineness better than OPC. It finds use mainly for masonry construction. Expansive cement : In this type of cement, there is a significant increase in volume (instead of shrinking) vis-à-vis PC paste when mixed with water.
The key element is the presence of sulfoaluminate clinker mixed with PC and stabilizer in the proportions of 10:100:15, respectively. This process not only improves the density but also the integrity of concrete. Oil-well cement (IS 8229-1986) : Oil-well cement is used by the petroleum industry for cementing gas and oil wells at high temperature and pressure.
There are eight classes (A to H) defined by IS:8229 that are manufactured. Each class essentially contains hydraulic calcium silicates. As per the IS code, no material other than one or more forms of calcium sulfate are interground with clinker or blended with ground clinker during production. The common agents, which are known as retarding agents, are starch, cellulose products, or acids to prevent quick setting.
Rediset cement: Cement which yield high strengths in about 3–6 hours, without showing any retrogression is rediset cement. It has similar 1- or 3-day strength as OPC. High alumina cement (IS 6452: 1989) : As per the IS specifications, high alumina cement is obtained by either fusing or sintering aluminous and calcareous materials and grinding the resulting clinker.
What is the classification of portland cement?
Types of portland cement – Five types of portland cement are standardized in the United States by the American Society for Testing and Materials (ASTM): ordinary (Type I), modified (Type II), high-early-strength (Type III), low-heat (Type IV), and sulfate-resistant (Type V).
- In other countries Type II is omitted, and Type III is called rapid-hardening.
- Type V is known in some European countries as Ferrari cement.
- There also are various other special types of portland cement.
- Coloured cements are made by grinding 5 to 10 percent of suitable pigments with white or ordinary gray portland cement.
Air-entraining cements are made by the addition on grinding of a small amount, about 0.05 percent, of an organic agent that causes the entrainment of very fine air bubbles in a concrete. This increases the resistance of the concrete to freeze-thaw damage in cold climates.
The air-entraining agent can alternatively be added as a separate ingredient to the mix when making the concrete. Low-alkali cements are portland cements with a total content of alkalies not above 0.6 percent. These are used in concrete made with certain types of aggregates that contain a form of silica that reacts with alkalies to cause an expansion that can disrupt a concrete.
Masonry cements are used primarily for mortar, They consist of a mixture of portland cement and ground limestone or other filler together with an air-entraining agent or a water-repellent additive. Waterproof cement is the name given to a portland cement to which a water-repellent agent has been added.
- Hydrophobic cement is obtained by grinding portland cement clinker with a film-forming substance such as oleic acid in order to reduce the rate of deterioration when the cement is stored under unfavourable conditions.
- Oil-well cements are used for cementing work in the drilling of oil wells where they are subject to high temperatures and pressures.
They usually consist of portland or pozzolanic cement (see below) with special organic retarders to prevent the cement from setting too quickly.
What is Type 3 portland cement?
TDS. TCC.100722 PRODUCT DESCRIPTION Portland Cement Type III is a low-alkali, special purpose hydraulic cement used to make concrete for a variety of building construction, repairs, grouts, or mortar applications where higher early strength than Type I-II Portland is needed.
How many grade of cement are there?
GRADES / TYPES OF CEMENT? – Cement is known to be a prominent ingredient that contains mortar, concrete, and plaster. The grade and strength of cement get to be determined by the concrete mixture of these ingredients. If you plan to build a house in Bangalore and think of which cement must be used for house construction, this article will help you!
|TYPES OF CEMENT and PROPERTIES OF CEMENT 33 GRADE CEMENT 43 GRADE CEMENT 53 GRADE CEMENT|
|TYPES OF CEMENT||33 Grade CEMENT IS 269:1989||43 Grade CEMENT IS 8112:1989||53 Grade CEMENT IS 12269:1987|
|PHYSICAL PROPERTIES: Minimum compressive strength, N/mm 2||N/mm 2||N/mm 2||N/mm 2|
|3 day 7 day 28 day||16 22 33||23 33 43||27 37 53|
|Fineness Minimum specific surface (Blaine’s air permeability) m 2 /kg||225||225||225|
|Setting time, minutes initial, minimum final, maximum||30 600||30 600||30 600|
|Soundness, expansion (Le Chatelier test, mm), maximum Autoclave test for MgO, percent, maximum||10.0 0.8||10.0 0.8||10.0 0.8|
|CHEMICAL PROPERTIES: Loss on ignition, per cent, maximum Insoluble residue, per cent, maximum Magnesia MgO, per cent, maximum||5.0 4.0 6.0||5.0 2.0 6.0||4.0 2.0 6.0|
|SO 3, per cent, maximum for C 3 A>5 per cent C 3 A > 5 percent||2.5 3.00||2.5 3.00||2.5 3.00|
|Lime saturation factor (LSF) Ratio, AF, minimum||0.66 to 1.02 0.66||0.66 to 1.02 0.66||0.8 to 1.02 0.66|
Notes: C3A = 2.65(Al2O3) – 1.69(Fe2O3). C3S = 4.07(CaO) – 7.6(SiO2) – 6.72(Al2O3) – 1.43(Fe2O3) – 2.85 (SO3), where CaO is the combined lime. Once you know the class of cement grades category, you will know how it will affect your house’s construction.
- The degree of cement gets differentiated by the indication terms of the strength,
- Also, read about the various grades of concrete used in the construction industry.
- There are many grades of cement or Types of cement grades that can be used in the construction industry such as 33 Grade Cement, 43 Grade Cement, 53 Grade Cement OPC Cement, etc.
The strength gets further measured as the comprehensive strength, the moulded cement in the standard cube. After 28 days of curing, it gets estimated. The measurements are in Mega-Pascal or N/mm. Generally, there are three types of cement grades; 33-grade, 43-grade, and 53-grade. Read on to know more about these types of cement that will help you decide on need. It’s always recommended to take suggestions on What Grades of Cement needs to be used for your building construction from your Hired Architects for designing your House and the structural engineer who designs the structure for the construction.
Is code for OPC 53 grade cement?
For 53 grade cement, IS code used to be IS 12269.
What is Type 2 portland cement?
Portland Type I/II cement is typically considered a general-purpose cement and is most often used for general construction purposes, such as precast concrete products, reinforced buildings, floors, sewers, bridges, and pavements.
How many types of OPC cement are there?
1.Ordinary Portland Cement (OPC): – There are three grades of OPC available:33 grade,43 grade and 53-grade cement. Cement grade is based on the compression strength (Mpa) of the concrete that will attain after 28 days of setting. Grade 33 refers to the cement attaining compression strength of 33 Mpa in 28 days of setting.
This is same for 43 and 53 grades of cement. Grade 33 and 43 were used for construction in the past. As per IS standard code Grade 53 grade of cement is recommended for house construction.53-grade cement can be partially replaced with 20% of fly ash by the weight of cement in the construction site and can be used.
Partial replacement of cement by fly ash not only saves cost but also improves the durability properties of cement due to the pore refinement (achieved by adding fly ash). This also increases workability and increases strength. OPC cement is used for structural elements like beams, columns etc.
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What is type1 t cement?
Maxpro Blended Cement Type 1T is produced with a lower CO2 footprint using an innovative technology that could reduce emissions in precast concrete applications. This is evidenced by its lower clinker factor or the amount of clinker used in the cement to make concrete.
What is the difference in type 1 and type 2 portland cement?
Type I is a general purpose portland cement suitable for most uses. Type II is used for structures in water or soil containing moderate amounts of sulfate. Type II(MH) is a moderately sulfate resistant cement that also generates moderate heat during curing.
What is OPC 53 grade cement?
Skip to content Maha Cement OPC 53 Grade admin_uth 2021-07-20T12:07:54+00:00 Maha – OPC 53 grade cement, is a high strength, best quality cement designed to suit the modern construction practices. It is manufactured with excellent quality clinker, containing high percentage (56-60%) of Tri-calcium Silicate (C3S), and optimum quantity of gypsum.
This cement is ideal for designing high strength, high performance concrete used in high rise buildings, bridges, flyovers, pre-stressed concrete applications, under water concreting, concrete roads etc. Due to its uniform and consistent 28 days’ compressive strength 60 MPa Maha – OPC 53 is the most preferred brand by Ready Mix Concrete manufacturers and infrastructure project engineers.
Please refer the table below for its typical values as against requirement as per IS 269-2015
|Physical Requirements||Requirement as per IS 269 : 2015||Maha Cement OPC 53|
|Fineness||Specific Surface (m 2 /kg)||225(min)||295|
|Setting Time||a. Initial minutes)||30 (min)||165|
|b. Final (minutes)||600 (max)||240|
|Soundness||Expansion of unaerated cement|
|a. By LeChatelier Method (mm)||10 (max)||1.0|
|b. By Auto Clave (%)||0.8 (max)||0.074|
|Compressive Strength||a.72 ± 1 hr i.e.3 days (M Pa)||27 (min)||38|
|b.168 ± 2 hr i.e.7 days (M Pa)||37 (min)||48|
|c.672 ± 4 hr i.e.28 days (M Pa)||53 (min)||60|
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How many grades of cement are available in Nepal?
Grade of cement How to use cement when building a house? What you need to know about cement. In a changing world, cement has become an integral part of every physical structure. It is not possible to think of building physical infrastructure without the use of cement.
- After the 2072 BS earthquake, the use of cement increased in remote villages.
- Cement is a ‘chemical blender’.
- Cement is used to bind sandy, ballast sand to sand.
- There are two types of cement, usually gray and white.
- Different types of gray cement have been used in the world market.
- However, in the case of Nepal, three types of gray cement are being used, namely OPC, PPC and PSC.
The most commonly used cement OPC is PPC. If OPC is being used in Pillar, Bimardhala, then PPC is being used for plaster casting. What is opc? Ordinary Portland Cement (OPC) is a cement made of ordinary limestone. Limestone is measured at 14 ग्री C and mixed with various substances to make a clicker.
The amount of clinker used in OPC is increased. OPC is made by mixing a maximum of five percent gypsum in clinker. As the amount of OPC clinker increases, it gets set quickly. OPC has three grades, 33 grades, 43 grades and 53 grades. Ordinary OPC of 33 grades. The highest grade of 43 grade cement is being used in the construction of structures.43 grade cement is used in the construction of buildings.
This is not to say that 43 grade cement should not be used in large scale construction in Nepal, most of the 53 grade cement has been given more priority. What is PPC? Portland Pozzolana Cement (PPC) is made from coal-fired ash (dust) (Pujolona) maclinker.70 percent clinker, 25 percent pujolonar and 5 percent gypsum are used in making this cement.
- Due to the small amount of clinker, it takes a long time to set up PPC.
- However, it is not a good quality cement.
- However, PPC is being used in Nepal for most of the time.
- Plaster is not used.
- This is not to say that structures cannot be built using PPC cement.
- PPC can be used if the structure is designed to be flexible.
What Psc? Portland Slag Cement (PSC) has just come into operation. Hard plaster is being used in both. Which structure to use? All cement has its own characteristics. OPCs are set faster than PPCs when the amount of clinker is higher. In Nepal, OPC is widely used for making pillars.
- OPC solution is used when working on ballast, sandstone poles, PPC is used when working with sand only.
- If the construction needs to be completed soon, OPC is used.
- Due to the rapid growth of OPC, the use of MICs in large projects is considered appropriate.
- If it takes more time to set up PPC cement, it will take less time to set up the structure of OPC.
OPC cement is also called ‘fast setting’ cement. This is not to say that PPC will not be demolished. Buildings are being demolished using PPC cement. Some people know that PPC cement is made of slope, while others are made of PPC cement in consultation with engineers.
All cement Has its own characteristics. OPCs are set faster than PPCs when the amount of clinker is higher. In Nepal, OPC is widely used for making pillars. According to the engineer’s advice, the OPC should be kept in water for some time after the construction of the leadpillar pillar. According to the engineer’s advice, after the construction of OPC ledge pillar, water should be kept in the water tank for some time so that the slope does not burst due to heat stroke.
Generally, the quality of OPC quality PPC cement does not differ significantly. The type of structure you are trying to build, the engineer has designed the structure, different grades of cement can be used accordingly. The biggest thing is the quality consistency of the cement you use.
However, when you buy cement from any company, it should be of high quality. The engineer has already decided which grade of cement to use when designing the structure. Generally, 53 or 43 grade cement is sought for tall buildings. However, the construction of a building does not necessarily require a grade of cement, the use of a grade of cement according to the design of the building strengthens the structure.
The design of the building depends on the strength of the building you are going to build, the grade of cement used, the strength of the gravel, sand, cement, chemical water and the strength of the building. Differences between graders Some consumers may be confused between the cement grade Nepal quality (NS) mark.
Cement grade is the load-bearing capacity. This is the strength of cement. In Nepal, OPC cement is available in 33rd grade, 43rd grade and 53rd grade. Different grades of cement are used according to the design of the structure. And, of course, yes.53 grade cement is also being used in the infrastructure of big buildings.
The department gives Nepal Quality Level (NS) mark by evaluating the study that the cement quality produced by the industry is not up to standard. The department periodically tests the samples of cement from the industry and the market. Consumers may be shocked when the department buys the quality mark provided by the department.
Cement is not officially sold or distributed in Nepal for quality consideration. How long can it be used? Cement is said to be stored properly, which determines its usefulness. A well-stored cement can be used for up to three months, depending on the production date. Storage method Cement storage should be done with caution.
Cement does not have to be smooth. Cement does not work well. Cement does not work well. Does the lumpy cement not work well. If it gets wet, the cement can deteriorate in a day. However, the cement can be used for up to three months in a dry enclosed room, covered with a water-repellent coating.
Care should be taken while making the solution This is the most important aspect. Cement is just a chemical blender. You have to make a solution according to your structure. Water has a very big role in making a solution of cement, ballast, sand. You should not use dirty water. Engineers have already decided which grade of cement to use when designing the structure.
Usually 53 or 43 grade cement is sought for a tall building. However, the construction of a building does not necessarily require a grade of cement, the use of a grade of cement according to the design of the building strengthens the structure. Engineers or experienced mechanics should make the solution only by removing the water-cement corrosion.
- Even if there is too much water in the solution, it will not work well.
- When making the solution, the ballast, sand and water should be clean.
- Only the slope is strong.
- Should not be mixed with sand, Cement may not work properly.
- If sand, water, cement and cement are mixed, the construction will be strengthened.
You bought the cement well. You bought the ballast sand according to the quality criteria. working man does not make the solution well, no matter how good the cement, ballast or sand is, it will not be strong. The man making the solution should be experienced.
After making the solution, it should be eaten well. General confusion about cement Some consumers may be confused about cement. Dozens of new brands of cement are available in the market now. We have to use cement according to the design of the structure as per the advice of engineer or consultant. However, some consumers are told, “Cement is not worth anything!” It should be understood that the cement may not be of the same quality.
The cement should be used as required during construction. Which cement is being used more in the market? Which cement users are interested in? What kind of infrastructure is being built by Kansi Cement? You can look at it from different angles. First of all, you have to see if the cement is made according to the quality standards.
The engineer knows a lot about the contractor company. Some people may think that a little bit of cement will make the house stronger. This is just an illusion. If the cement is too much, the house will not be strong. Cement should not be overcooked, nor should it be overcooked. Only quality mix with cement, water, ballast and sand can be used for quality construction.
If the mixing is good, no matter what the brand or grade of cement is, the structure will not be strong. Cement is one of the characteristics of Nunn, when it is low, when it is high. If the design of the building is suitable for 43 grade cement, but using 53 grade cement, it does not mean that it will be strong.
- The quantity of cement in the solution should be fine.
- If the ratio is less than the cement used, the construction should not be strong.
- Therefore, in order to make the vegetables palatable, it should be kept in the right way, and in the construction work, the quantity of cement should be used as per the technical requirements.
Consumers should pay attention when buying cement When was the first cement made when buying cement? You have to look at the production date. Cement should be checked to see if it is cracked. When buying cement, you should not look at the quality mark of Nepal.