Tag Archives: Cement paste

The right protocol to measure yield stress of cement paste

The rheology of cementitious material paste is complex and difficult to be investigated. One value of rheology is yield stress. The best method to measure the yield stress in laboratory is using the vane method. However, there is no much literature reporting an practical and detailed testing protocol to measure the yield stress of cement […]

How much is the bulk density of hydrating (blended) cement paste?

In the last post, I explained the clear definition of different densities. Among these densities, bulk density and apparent density are the two most important values when performing mercury intrusion porosity (MIP) experiment. Since samples that undergo MIP are usually irregular, the bulk volume is not possible to measure without being immersed in liquid. By […]

What is density? how to distinguish different density definitions?

As material researchers, we know density is the physical property of materials. Even since grade school, we are taught that density is simply the mass of an object divided by its volume. However, this is pretty complicated in the case of cementitious materials. The mass of a certain amount of harden cement (or concrete) paste […]