The many kinds of cement and what they’re used for
Each type of cement is formulated for a specific purpose, with different chemical compositions and performance requirements. Here are the different types of cement that you can use for your construction projects.
Normal Ordinary Portland Cement (OPC)
This is the most common type of cement found in everyday household uses. The name “ordinary” comes from its low resistance against sulfate attack. OPC may be grey or white, depending on its composition and raw materials used.
Rapid Hardening Cement (RHC)
Rapid hardening cement is a fast-setting hydraulic cement that is used in concrete constructions including precast concrete, prestressed concrete, roads and express highways. This type of cement has high early strength development properties and improves the durability of hardened concrete. It can also be used as a replacement for normal OPC when time constraints apply to a project or if a faster return to service is required.
Low Heat Cement (LHC)
Low heat cement is similar to ordinary Portland cement except for one difference: it contains less tricalcium aluminate (C3A). Tricalcium aluminate reacts with water at an early stage to initiate hydration, which results in higher heat
There are many different kinds of cement and each has its own unique properties for various use cases and conditions. Each type of cement is specifically formulated for a specific purpose. Here is a short guide to the most common types of cement, when they are used, their strengths and any potential issues you may encounter.
Portland Cement: The most common kind of cement, it has been used since the 1800s. It’s made from a combination of calcined limestone and clay that is ground, heated and clinked (this process produces chemical byproducts that are then added as well). This can result in high alkali levels, which can be a problem in some areas. It’s generally used to make concrete floors, walls and roofs; however it can also be used to make precast items such as concrete pipes and bricks.
Fly Ash Concrete: These cements are made with fly ash instead of portland cement. This can lower the alkali content and increase strength. Fly ash cements are not water-proof but they do create more “green” concrete because they use recycled materials. They are also less expensive than Portland cements because they’re not as energy intensive to make. They can be used for driveways, floors, walls and roofs but aren
All cement is not created equal. There are many factors that can affect the type of cement you need for your project; exposure to harsh weather, chemical contact, high heat, etc. If you’re working on a project where your concrete will be exposed to these conditions, it’s important that you choose the right kind of cement for your needs.
Type I: General Use Cement
Type IA: Air-Entraining Cement
Type II: Moderate Sulfate Resistance Cement
Type IIA: Low Heat of Hydration Cement
Type IIIA: High Early Strength Cement
Type IIIB: High Early Strength Cement with Low Heat of Hydration
Type IV: Low Heat of Hydration Cement
Type V: High Sulfate Resistance Cement
Cement is a substance used in construction that hardens and can bind other materials together. There are many types of cement, but the most commonly used is Portland cement. The name comes from its similarity to Portland stone, a type of building stone quarried on the Isle of Portland in Dorset, England.
Portland cement is made from limestone and clay or shale. These raw materials are extracted from the quarry crushed to a very fine powder and then blended in the correct proportions. This blended raw material is called the ‘raw feed’ or ‘kiln feed’ and is heated in a rotary kiln where it reaches a temperature of about 1400 C to 1500 C. In its simplest form, when this ‘clinker’ is ground with a small amount of gypsum it becomes ‘Ordinary Portland Cement’, which is the cement used in construction throughout the world.
The clinker itself consists of four crystalline compounds: tricalcium silicate (3CaO·SiO2), dicalcium silicate (2CaO·SiO2), tricalcium aluminate (3CaO·Al2O3), and a tetra-calcium aluminoferrite (4CaO·Al2O3Fe2O3).
Cement is the second most used material in the world after water. It’s used to make concrete and mortar. Mortar is a mixture of cement, water, sand and lime that is generally used for bricklaying and blockwork. Concrete is a mixture of cement, water, sand and gravel that is used in the construction industry to make slabs, wall panels, foundation footings and many other building components.
Different types of cement are used for different purposes depending on their strength, durability, setting time, etc. Here we will discuss the properties of different kinds of cement available in the market for meeting different needs.
Quick Setting Cement: This type of cement sets faster than normal OPC (Ordinary Portland Cement), i.e., approximately within 20 minutes as compared to about 3 hours for OPC 33 Grade (normal). It does not have any special chemical composition and can be mixed using any standard quality concrete mixer machine. Quick setting cement is used for emergency repair work under water or where there is little time available for construction work like mending a broken pipe or repairing a failed culvert etc.
Low Heat Cement: This type of cement has a lower heat generating potential than OPC 43 grade during hydration process due to
Cement is a powdery substance, made from a mixture of elements that are found in natural materials such as limestone, clay, sand and/or shale. When cement is mixed with water, it can bind sand and gravel into a hard, solid mass called concrete.*
There are many different types of cement used for many different building and construction applications. Each of these types of cement has special properties that make them better suited for certain uses than others. There are also special cements for specific applications, such as sulphate-resistant cement for foundations exposed to groundwater high in sulphate content or low-heat cement to minimize heat evolution during the curing process. The most common use for Portland cement is in the production of concrete. Concrete is a composite material consisting of aggregate (gravel and sand), cement, and water. As a construction material, concrete can be cast in almost any shape desired, and once hardened, can become a structural (load bearing) element.*
Portland Cement – This is the most common type of cement and one that we supply at Hanson.*
Portland cement is commonly mixed with other ingredients to create mortars (for masonry construction) or concretes (a mixture of aggregate, sand, water and Portland cement).*
Portland cement
Concrete is a construction material that is usually composed of cement, aggregate (gravel, sand), and water. So, if you want to make concrete, you just have to add water to the mixture of cement and aggregate.
This process makes the concrete stronger as the chemical reaction between the components of cement (silica, alumina, and iron oxide) and water creates a new compound called hydrated calcium silicates.
The chemical reaction is called hydration. Since this process takes time, concrete hardens slowly with time. And it must not be exposed to water during that period of time.
So when we talk about waterproof cement, we mean a mix of cement and aggregates which can be used under wet conditions without compromising its strength or durability.
In other words, waterproof cement will retain its strength even after prolonged exposure to water or moisture.