What Are The Disadvantages Of Cement?

What Are The Disadvantages Of Cement
Disadvantages of Concrete : – Concrete has following disadvantages: 1. Its tensile strength is very low of the order of 10% of the compressive strength. Thus it develops cracks. To avoid the development of cracks, steel is used as reinforcement.2. Due to rise in temperature, concrete expands and due to fall in temperature it shrinks.

  • Thus to avoid the development of deformation in concrete structures, expansion joints are provided at suitable locations and interval.3.
  • The fresh concrete shrinks very much on drying and hardened concrete expands on getting moisture, and again shrinks on drying.4.
  • Concrete is not fully impermeable material.

Hence to store salty water, special treatment of the surface is essential, more specially at joints.5. For structures which come in contact with alkaline and sulphate mixed water, special cement should be used as ordinary cement will disintegrate easily.6.

What are the advantages of using cement?

Functions of Aggregate and Cement Paste : – The aggregate has following three main functions: 1. It provides a mass of particles, which resists the action of applied loads, abrasion, percolation of moisture and the action of the weather.2. It reduces the volume changes resulting from setting and hardening process and from moisture changes in the cement paste.3.

  • It provides relatively cheap filler for the cementing material.
  • The properties of concrete resulting from the use of a particular aggregate depend upon the following factors: 1.
  • The mineral characteristics of the aggregate particles.
  • It influences particularly strength, durability and elasticity of concrete.2.

Surface characteristics of the particles. It has a marked influence on the workability of fresh concrete and bond in the hardened concrete.3. Grading of aggregate. It has a marked influence on the workability, density and economy of concrete.4. Amount of aggregate per unit-volume of concrete.

What are the disadvantages of concrete floor?

Advantages and Disadvantages of Polished Concrete Floors Generally speaking, the disadvantages of polished concrete floors are very few. They involve things like discoloration, stains that are deeply embedded in the concrete, or imprints made when the concrete slab was initially poured.

These disadvantages do not occur after a concrete floor has been polished and sealed, though. They are all pre-existing conditions from having a concrete slab that has not been sealed or maintained properly throughout the years. All of these sorts of blemishes should be identified by your contractor prior to the start of your project.

A flooring contractor with a keen eye and experience in the trade will be able to adequately manage his customers’ expectations prior to commencing a project, and let you know exactly what to expect from your floor.

  • Polished concrete has, over the last decade or so, become one of the most popular flooring solutions available in today’s marketplace due to its affordability, ease of maintenance, efficiency, cleanliness, and ability to aesthetically fit into both industrial and posh environments.
  • As opposed to most other flooring options available, polished concrete floors come with a myriad of benefits that are unique to its own installation. Here is our list of advantages polished concrete flooring solutions provide to our customers:
  • Affordable

Polished Concrete floors are more economical than their hardwood, tile, marble or stone alternatives. Typically, the cost of polishing a concrete floor will match up to or be less than the cost of purchasing the materials for a tile or hardwood flooring installation.

Bottom-Line Polished Concrete floors save facilities a ton of money in maintenance costs. While other flooring solutions require stripping, waxing and refinishing, a polished concrete floor requires no maintenance after it has been installed and remains intact permanently. Longevity As long as your concrete slab remains in place, so will your polished concrete floor.

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There is no potential for flooring failure, delimitation or lifting or breaking. Other sorts of flooring systems, for example, suffer by comparison. There will be no need for touch-up work or repair, no matter how long you keep your polished concrete floor.

  1. Invulnerable to Moisture Damage and Mold
  2. Unlike other flooring options, polished concrete is immune to moisture damage and mold, making it a great choice for families with allergy vulnerability or asthmatics.
  3. Versatility

Polished concrete allows business owners and homeowners an unlimited set of options as to color and design. Polished concrete floors can be used in indoor applications as well as outdoor applications and can be stained and dyed with an unlimited variety of colors and designs.

  1. Simple Care The only care and maintenance that is required for a polished concrete floor is to swab it once a week with a neutral-based cleaner and water.
  2. That’s it.
  3. Environmentally Friendly There are no dangerous or harmful chemicals involved in the installation of polished concrete flooring systems.

They are totally safe for you, your employees, customers and children. These flooring systems resist against mustiness, allergens and fungus. Design The stains and dyes available for polished concrete floors are limitless. You can choose different colors and different aggregates to incorporate into your concrete flooring system to achieve whatever aesthetic you want.

  • Additionally, there are no grout-lines since these floors are completely seamless.
  • The seamless attributes of these flooring systems open up and free any space of clutter and offer your clients and guest a more welcoming environment.
  • At Blackrock Industrial, we specialize in the installation of floors and and are known as one of the most reputable concrete flooring contractors in Florida.

We take pride in our work and also in our ability to offer the most competitive pricing in this arena due to the fact we do not subcontract any of our work and own all of our machines and tooling. Give us a call or on our website to schedule a site visit with one of our installation specialists in order to receive an exact quotation for your concrete flooring project.

What are the disadvantages of concrete and how are they overcome?

Limitations of Concrete Disadvantages of Concrete are as follows: Concrete has a very low tensile strength and requires the use of reinforcing bars in concrete tensile zone. Expensive formwork is required for casting and molding and to hold the concrete in place until it hardens sufficiently.

What is the disadvantage of concrete slab?

4. Slab Cracks – One of the most significant potential disadvantages is if the slab cracks. This can substantially compromise the structural integrity of the house and be difficult and expensive to repair. Among the factors that can result in a slab cracking are tree roots, soil displacement, earthquakes, or frozen ground.

Why cement companies are falling?

Reasons why cement stocks are falling – Cement shares have been falling in recent months due to the declining demand for cement. It is mainly due to the slowdown in the construction sector. The construction sector is a major user of cement. Additionally, the oversupply of cement in the market has also put pressure on prices, leading to a decline in cement stocks.

How long do cement house last?

By itself, concrete is a very durable construction material. The magnificent Pantheon in Rome, the world’s largest unreinforced concrete dome, is in excellent condition after nearly 1,900 years. And yet many concrete structures from last century – bridges, highways and buildings – are crumbling.

  • Many concrete structures built this century will be obsolete before its end.
  • Given the survival of ancient structures, this may seem curious.
  • The critical difference is the modern use of steel reinforcement, known as rebar, concealed within the concrete.
  • Steel is made mainly of iron, and one of iron’s unalterable properties is that it rusts.
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This ruins the durability of concrete structures in ways that are difficult to detect and costly to repair. While repair may be justified to preserve the architectural legacy of iconic 20th-century buildings, such as those designed by reinforced concrete users like Frank Lloyd Wright, it is questionable whether this will be affordable or desirable for the vast majority of structures. Old bridges need new money to replace. Phil’s 1stPix/Flickr.com, CC BY-NC Steel reinforcement was a dramatic innovation of the 19th century. The steel bars add strength, allowing the creation of long, cantilevered structures and thinner, less-supported slabs.

  • It speeds up construction times, because less concrete is required to pour such slabs.
  • These qualities, pushed by assertive and sometimes duplicitous promotion by the concrete industry in the early 20th century, led to its massive popularity.
  • Reinforced concrete competes against more durable building technologies, like steel frame or traditional bricks and mortar.

Around the world, it has replaced environmentally sensitive, low-carbon options like mud brick and rammed earth – historical practices that may also be more durable. Early 20th-century engineers thought reinforced concrete structures would last a very long time – perhaps 1,000 years.

In reality, their life span is more like 50-100 years, and sometimes less. Building codes and policies generally require buildings to survive for several decades, but deterioration can begin in as little as 10 years, Many engineers and architects point to the natural affinities between steel and concrete: they have similar thermal expansion characteristics, and concrete’s alkalinity can help to inhibit rust.

But there is still a lack of knowledge about their composite qualities – for example, in regard to sun-exposure-related changes in temperature, The many alternative materials for concrete reinforcement – such as stainless steel, aluminium bronze and fibre-polymer composites – are not yet widely used. Cheap and effective, in the short term at least. Luigi Chiesa/Wikimedia Commons, CC BY-SA There are technologies that can address the problem of steel corrosion, such as cathodic protection, in which the entire structure is connected to a rust-inhibiting electric current.

  • There are also interesting new methods to monitor corrosion, by electrical or acoustic means.
  • Another option is to treat the concrete with a rust-inhibiting compound, although these can be toxic and inappropriate for buildings.
  • There are several new non-toxic inhibitors, including compounds extracted from bamboo and bacterially derived “biomolecules”,

Fundamentally, however, none of these developments can resolve the inherent problem that putting steel inside concrete ruins its potentially great durability.

What is good quality cement?

The cement should be lump- and dust-free and feel cool to the touch, indicating no hydration reaction is taking place. Look at the color. Cement for building construction should be a uniform greenish-gray, while cement for decorative applications is white.

What are the disadvantages of white cement?

White Portland Cement use cases; Pros and Cons – Articles > White Portland Cement use cases; Pros and Cons Introduction to White cement: White Portland cement also called White Ordinary Portland Cement (WOPC) is similar to Ordinary Portland Cement and PPC in all respects except its white color. Obtaining this color requires a radical change in the way it is made, and because of this, it is more expensive than a gray product. Use of White Cement: Portland white cement is used in combination with white ingredients to produce white concrete for projects to build fame and decorative work. White concrete often takes the form of precast panels, as it is not economical to use white cement for construction purposes.

The cost of production of white cement as compared to OPC and PPC is much higher, therefore in ordinary construction like concrete structures, mortar, and plaster, white cement is not recommended. White cement is used only in fixing marble tiles, sheathing of walls, floors, and roofs. The white cement is also mixed with white aggregate, to construct the floor sheathing and skirting of the walls.

The one and only purpose of the white cement is to give charm and decorate the surface areas of the building. White cement is also added to lime for a whitewash. The combination of white cement increases the adhesive characteristic of the lime. Advantages of White Cement:

  1. Thermal insulation of concrete made of White Portland Cement is better than other types of cement.
  2. White cement is a good reflector to the light. It not only gives good looking and charm to the building, but also it saves energy to enlighten the interior and exterior of the building.
  3. Products of white cement can be recycled and reused in other products at the end of their useful life.
  4. White cement can be applied as wall putty in order to fill the uneven surface of the wall before applying paints to the wall.
  5. The white cement can be used instead of white paint or lime or other whitewash material.
  6. White cement can be used to set the top roof pavers, road and street pavers, marble tiles, and ceramic tiles.
  7. White cement has a strong waterproof effect. We need not any waterproofing coating on the structure.
  8. The structures made of White cement are able to withstand the highest temperature.
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Disadvantages of White Cement:

  1. White Portland Cement is four times costlier than ordinary Portland cement.
  2. The strength of white cement is lower than that of ordinary Portland Cement and Pozzolana Portland Cement.
  3. White Portland Cement can not be used in concrete structures, as it has less compressive tension.
  4. Setting time White Portland Cement is very short, masons should be frisky while setting it.

How is the white cement manufactured? The manufacturing process of White Cement is quite similar to that of Ordinary Portland Cement. The process of manufacturing White Cement is involved in reducing the effectiveness of cement due to the addition of impurities.

  1. Crushing ? Carbonate composition makes extensive use of basic crushing. Since a large amount of oxide dye is concentrated in fine particles, it is best to remove fine particles before applying them to a cement crusher. The clay ingredients are often ground separately.
  2. Cement raw materials grinding : The white cement requires a finer size than OPC. Most of the cement raw material is ground by means of a cement mill.
  3. Homogenization : only homogenized raw materials are promised to be heterogeneous at the microscopic level. The homogenization is very important to the white cement manufacturing process, its multi-component mixtures are generally more prone to segregation than raw materials used in the gray cement production lines.
  4. Clinker production : There are various combinations of preheating and calcining systems, and which process is better depends on whether the existing plant needs to be rebuilt and how much the plant operators invest in the construction. The cement rotary kiln and cyclone preheater are the recommended group here.
  5. Cement grinding : Cement is composed of the cement clinker and thickening control agents. Gypsum is used as a thickening time control agent in the manufacturing of White Cement. Clinker and gypsum are ground in the grinding machine to produce the fine cement powder. Which is the finished form of the white cement.
  6. Packing and shipping : The finished cement powder is packed in cement bags and pouches. The bags/ pouches are, then shipped to the market.

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