(ASTM C150) Portland cement is the type of concrete that is typically used and also the same kind that you buy in a bag. A powdery substance made by burning at a high temperature a mixture of clay and limestone which produces lumps that are ground into a fine powder consisting of hydraulic calcium silicates
a hydraulic cement produced by pulverizing portland cement clinker and usually containing calcium sulfate
A powdery substance made by burning, at a high temperature, a mixture of clay and limestone producing lumps called “clinkers” which are ground into a fine powder consisting of hydraulic calcium silicates. For non-portland cements, see aluminous cement.