Ordinary Portland cement is available in following types 33 grade, 43 grade & 53 grade. Ordinary Portland Cement (OPC)It is utilised for interior and exterior decorative work like external renderings of buildings, ornamental, paths of gardens, and swimming pools etc. Types of pigments are selected according to the desired color.
Pozzolana cement is manufactured by mixing 30% of pozzolana to Ordinary Portland cement clinkers.

The acidic constituents are SiO2, Al2O3, Fe2O3 and the alkaline ones are CaO and MgO. Do you know? An excess quantity of sulfur causes the cement to become unsound. Setting Time: The initial setting time shall not be less than 60 minutes. The pozzolanic materials do not have any cementing qualities when used alone, but when mixed with Portland cement, they react with cement components and form compounds with cementing properties. Ordinary portland cement, rapid hardening cement, low heat portland cement, air en training cement , sulfur resisting cement , high alumina cement

When air-entraining cement, the air voids in concrete provides space for water to expand without cracking concrete. But they do not shrink during and after the time of hardening. Formwork (Shuttering) for Concrete [Its Types, Design]. Types of Stones | Their Structure, Composition, and Properties. But it is necessary that a thorough and intimate mixing of the raw materials is essential to ensure a thorough and a complete chemical reaction between the ingredients while clinkering. To understand the technique of proportioning of raw materials, it is necessary to know the following. The formed around each grain of cement reduces the rate of deterioration of the cement during long storage, transport, or under unfavourable conditions. The pozzolana cement has many properties similar to ordinary Portland cement. Ordinary Portland Cement (OPC) Ordinary Portland cement is the most widely used type of cement, which is suitable for all general concrete construction. These are manufactured with two or more raw materials.

OPC is not suitable for the construction work which is exposed to sulphates in the soil. The calcined product which is called clinker.

(ii) It offers greater resistance to sulfates and corrosive actions of sea water. It is also used in most of the masonry works.

We have published three articles on rapid hardening cement on our website. Air-entraining cement is a special type of cement which entrains tinny air bubbles in concrete. They are mostly used in the structures where water proofing is required, like in the Dams, Water Tanks, etc. They are used in those circumstances where aggregates -for making concrete- are suspected to contain reactive silica. Its quality is that it set into a stone-like mass within a period of fewer than 30 minutes. This is achieved by using special devices called cyclone air elutriator. because of Hydration (The chemical reaction between cement and water )This type of cement can also harden in underwater. Oxide of iron requires a very high temperature to enter into chemical reaction with calcium and aluminum to form tricalcium alumino-ferrite, which imparts hardness and strength. It is also used in pre-stressed and post-tensioned concrete members. This is because these compounds are known to liberate a very high amount of heat during hydration. In the hydration process, the expansive cement expands its volume. But later, they found that it decreases durability. It reacts with calcium hydroxide generated by hydrating cement to form additional cementations materials when it is finely divided. (a) Calcareous materials and (b) argillaceous materials. The use of additives, changing chemical composition and use of different raw materials have resulted in the availability of many types of cement.

Rapid Hardening Cement: It is used in the construction of pavements mostly.
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But this type of cement does not provide high strength in concrete. This type of cement is manufactured by grinding ordinary Portland cement clinker with water oleic acid or stearic acid. The magnesium oxide content (MgO) shall not exceed 5.0% by mass.

This property makes it useful for use in mega projects like Dams. In the construction of different hydraulic structures, this type of cement is used. Gypsum is added after the clinker is formed and during the process of grinding clinker. Anhydrous tetracalcium trialuminate sulfate (C4A3S). It is used for the construction of dam’s large footing, large raft slabs, and wind turbine plinths.

Therefore, it must not come in contact with lime.

Portland cement clinker and granulated blast furnace slag are intergraded to make blast furnace cement. And Argillaceous ones include mainly silica, alumina, and oxide of iron such as clay and shale. Ordinary Portland Cement. In return, We feature your name in author box with your social links. The information provided should not be used as a substitute for professional services. The total Alumina content is generally above 32 percent. Due to this, it is not suitable for use in mega projects like Dams.

These chemicals form a layer on the cement particle and do not allow water to mix and start the hydration process. This type of cement is manufactured by lowering the C3S content and increasing the C2S content.

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