Application of surface wastewater sludge in the production of composite building materials

Abstract

The article deals with the efficient disposal of technogenic waste, wastewater sludge in particular. On the basis of literary sources the possible uses of wastewater sediment in the production of building materials are considered. The proposed option is to organize materials using sediments of wastewater, which is based on the dependence of the aggregate condition of sediment on the type of building material. It is suggested to use wastewater sludge as complex additive to improve the rheological characteristics at all stages of hardening of cement-sand and concrete mixtures, as well as to improve the physical and mechanical properties of cement-sand samples. The physical (material) and chemical composition of sediment has been studied, their physical and mechanical characteristics have been determined. In order to determine the effect of introducing sewage sludge modified with plasticizing additives into the concrete composition on compressive strength and average density a single-factor variance analysis was carried out. The optimal percentage of sewage sludge in the composition of heavy concrete was selected, as well as the optimal ratio of chemical modifying additives.