Composite Binder With Mineral Additives for Non-Autoclave Foam Concrete

Abstract

The possibility of increasing efficiency of non-autoclaved foam concrete due to the use of complex binder with mineral components of different composition has been theoretically substantiated and experimentally confirmed. The opportunity to use the anhydrous calcium sulphate as a modifying component of the mixture is proved, which accelerates the setting of the mixture. This allows to "fix" the structure of the aerated concrete mixture with minimal shrinkage deformations. It is shown that the combined use of anhydrite and a mineral additive in the form of a quartz suspension obtained by grinding sand in an aqueous medium leads to a liquefaction of the mixture, which is associated with a decrease in the share of the structure-forming component. From a technological point of view, this will allow obtaining materials with a rational pore structure by optimizing the processes of pores formation. Composite binder with mineral additives is characterized by increased strength with a reduced share of clinker component in comparison with cement. In result, the minimization of shrinkable deformations and improvement of the quality of cellular concrete are ensured