Month: October 2020

#opc #ppc #opcvsppc
OPC VS PPC Cement | Difference in Hindi | Which Cement is Best and Why ??
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ordinary portland cement

What is PPC Cement?
PPC Cement stands for” Portland Pozzolana Cement”. Pozzolana is an extender a supplementary cementitious material used to enhance improve the strength and durability of the cement. The word Pozzolana comes from the word ‘Pozzoluana’ which is a form of Volcanic Ash.

Volcanic Ash is the first form of Pozzolana used in PPC cement, which also includes natural and artificial siliceous and aluminous materials such as clay, slag, silica fume, fly ash & Shale .Some of these above-mentioned materials are industrial surplus byproducts waste residues produced from other processes but they and are ideal in producing PPC Cement.
Pozzolana as a material is an artificial material which possesses silica in its reactive form. Along with 20–35% of Pozzolanic materials, PPC majorly also contains portland OPC Clinker(65–70%) and Gypsum.
What is OPC Cement?
OPC Cement stands for ‘Ordinary Portland Cement’. It is the most widely and commonly used variant type of cement in the world. Used mainly in the construction of high rise buildings, OPC Cement takes the lowest time to settle set and harden.
OPC Cement is manufactured by adding limestone and other raw argillaceous, calcareous materials and gypsum materials like argillaceous, calcareous and gypsum. OPC can be manufactured on a large scale wherever there is availability of minerals like limestone, due to the easy availability of raw materials an essential ingredient for production of Portland cement. required for its production. It is the most popular choice of cement throughout the world due to it’s versatility as a major binding material.as its production costs are comparatively lower.
OPC Cement is one of the most commonly used materials in the concrete for the construction of Dams, Roads, High rise buildings, Flyovers, Bridges, Residential homes etc. It is available in three grades on the basis of its strength and durability, namely,
● OPC 33
● OPC 43
● OPC 53
These above grades imply the maximum minimum strength of the cement after 28 days.
Difference between OPC and PPC Cement:
OPC and PPC Cements are differentiated in the following criteria mentioned below:
● Components:
OPC Cement is prepared from a mixture of limestone and raw argillaceous & calcareous materials and gypsum like argillaceous, calcareous, gypsum.
PPC Cement is prepared by adding Pozzolanic materials to OPC Cement
● Strength:
The initial strength of OPC is higher than PPC, but for a longer duration of time, Strength of PPC is higher.
● Setting time:
Final setting time of OPC Cement is comparatively lower than PPC Cement, which makes it effective for your construction.
● Durability:
OPC Cement is less durable in aggressive weather as compared to PPC Cement.
● Costs:
OPC Cement is costlier as compared to PPC Cement, which makes PPC a better option for your residential constructions.
● The heat of Hydration:
OPC generates more heat during hydration reactions making it unsuitable for mass casting.
While PPC has a slow hydration process due to which heat generation is comparatively lower.

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