Theoretical Basis of Searching for New Additives, Reducing Cement Systems Shrink

Abstract

A hypothesis about the mechanism of reducing shrinkage deformations under the influence of organic additives is presented. It may become the basis for the search for new additives that reduce the cement stone shrinkage by preventing the convergence of parallel surfaces of new formations due to electrosurface interactions with the functional group of the additive. The results of the study of the shrinkage of foam concrete with the addition of citric and sulfanilic acids are presented. It was found that they reduce shrinkage deformations by up to 76% with follow-up periods of up to 60 days. The proposed scheme of the action of additives on shrinkage allows us to conduct a directed search for surfactants that reduce the shrinkage deformations of foam cement stone