Influence of Low Pressure Steam Curing on Development of Strength of Mortars Based on Cement with High-calcium Fly Ash

Due to sustainable development policy, concrete additives such as high-calcium fly ash (HCFA) are nowadays used more often than ever and in wider range of possible uses. Therefore, research into characteristics of HCFA and its influence on the properties of cement and concrete is extremely relevant in current concrete technology. In this paper, Authors present the results of research into influence of low-pressure steam curing on compressive strength of mortars with HCFA. Samples of five different cements (CEM II/B-M(S-W) 10/20, CEM II/B-M(S-W) 20/10, CEM II/B-W, CEM II/B(V - W), CEM II/B(LL-W)) were steam-cured in temperatures 40oC, 60oC and 80oC. Conducted compressive strength tests confirmed the possibility of using cements with HCFA in mortars undergoing low-pressure steam curing in this aspect.