Book Description

Seven air-entrained concrete mixtures containing 6-in. maximum size limestone aggregate were tested to determine if the 21-day moist-curing requirements for concrete containing type IV portland cement, a pozzolan, natural cement, or slag cement could be reduced to 14 days as required for type II portland cement and portland blast-furnace slag cement (type IS) concrete. One of the seven mixtures was a reference mixture containing type II portland cement as the only cementitious material, while the other six mixtures were proportioned as follows: two mixtures with fly ash pozzolan and type II portland cement; one mixture with calcined shale pozzolan and type II portland cement; one mixture with natural cement and type II portland cement; one mixture with a different type II cement; and one mixture using portland blast-furnace slag cement. Specimens made from each mixture were cured under six different curing conditions, and tested for compressive strength, abrasion resistance, and permeability. (Author).