Waste moulding sand as a substitute aggregate in the manufacture of autoclaved cellular concrete

The article presents the results of research on the possibilities of utilizing waste moulding sands with silicate and geopolymer binders in the production of autoclaved cellular concrete. The high content of silica in the waste moulding and core sands is a factor in favour of this technological solution. The general idea of the study was to make a series of concrete mixes, which would contain in their composition waste moulding sands, which was then introduced to the basic raw material mixture on the principle of gradually increasing the substitute of fresh silica sand. The possibility of utilization of the waste moulding sand was evaluated based on the results of comparative analysis, covering the main technological properties of the two types of materials, i.e. the base cellular concrete composed of "fresh" silica sand only, and experimental cellular concrete, where fresh silica sand was replaced in different proportions with waste moulding sand.

Download 1.02 MB >>