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Portland cement

What is cement and its history?

Cement, the gray and fine powder, is the most used construction material on the world. However, how many people do they know what cement is? the answer for this question from Wikipedia is as follows, In the most general sense of the word, a cement is a binder, a substance that sets and hardens independently, […]

Categories
Portland cement

Features of microstructure development in the inner product of reacting slag in blended cement

The morphology of inner product region derived from alite or belite is identical to those present in neat OPC paste. In mature pastes, fully hydrated small grains of both alite and GGBFS often display a coarse morphology. Generally, inner product in larger grains has a dense homogeneous morphology with very fine porosity, and large slag […]

Categories
Portland cement

Chemical reaction of limestone with C3S and C3A

The hydration rate of C3S is accelerated in the presence of limestone probably because of the dilute effect and the multiplied nucleation sites. Jean Pera et al. reported that the total heat resulting from pure C3S hydration was 145 joules while that of the mixture (50%C3S+50%CaCO3) reached 260 joules. Ramachandran’s investigation showed that some calcium […]