Influence of Temperature and Humidity of the Environment where the Concrete Hardening Takes over on the Efficiency of Surface Microdosis Application

Abstract

Studies have shown the effect of ultra-low doses of surfactants on the compressive strength of cement stone and fine-grained concrete, which harden under conditions of heat-wet treatment, due to lack of research and widespread use of such treatment in concrete technology. It is proved that in this case the effect of ultra-low doses of surfactants is to reduce the number of open pores in cement stone and concrete. Experimental studies have confirmed that the molecules of surfactants, such as sodium oleate, polyhydric alcohol or others, significantly changes the hydrogen content of water used for the manufacture of concrete. This increases the mechanical strength of cement stone and concrete. It is determined that the increase in temperature and humidity of the medium in which the concrete hardens leads to an increase in the effectiveness of ultra-low doses of surfactants on the formation of compressive strength