Tag Archives: Portland cement

Hydration Mechanisms of Portland Cement: Topochemical or Through-Solution Reaction?

When we simulate the hydration process of Portland cement, it is of significant importance to know the hydration mechanisms. Basically, there are two mechanisms for the hydration of Portland cement, viz. Topochemical and Through-Solution Reaction. 1 Topochemical Reaction Concept Immediately after the first contact of the cement with water a calcium-rich silicious clinker would liberate […]

How GGBS is used and its typical substitution rates

How is GGBS used? GGBS (Ground Granulated Blastfurnace Slag) is used all over the world as a direct replacement for Portland cement. It is added to the concrete mixer along with ordinary cement, aggregates and water. The normal ratios and proportions of aggregates and water to cementitious material in the mix remain unchanged. Mixing times […]

Overview of global cement price 2012

Several days ago, I posted that the global cement output is decreasing in the first half of 2012. So how about the price trend of cement worldwide? Is it increasing or not? Information from different sources shows the prices of cement varies worldwide. For instance, prices of cement in South Africa had been retailing at […]