Высокопрочное вяжущее на основе жидкого стекла для бесцементного полистиролбетона

Abstract

This research set out to obtain a high-strength binder based on low-energy liquid glass using silica fume produced in the Bratsk Ferroalloy Plant. The starting materials used for the development of polystyrene concrete were liquid glass obtained from silica fume using sol-gel technology, fly ash, screening from diabase crushing, ground channel quartz sand and foamed polystyrene granules. Math-ematical processing of the results was performed using the Statistica 10 software package in the mod-ule of planned experiment. According to the conducted analysis, the resulting material corresponds to the strength characteristics of concrete classes B1–B3 with an average density of 400–600 kg/m3. In comparison with polystyrene concrete based on cement, foamed polystyrene concrete based on the developed complex binder has half the shrinkage strain. This can be explained by the reduced water-absorbing capacity and hydraulic activity of the hardened binder, which ensures the stability of the block sizes during long-term operation. The results of determining the thermal conductivity show the effec-tiveness of polystyrene concrete as a heat insulator. Based on the optimized composition of the binder die, filled light concretes were obtained using foamed polystyrene boulder from recycled packaging ma-terials. Effective heat-insulating and heat-insulating structural concretes of D400–D600 density grades characterized byan increased stability of geometric dimensions were obtained.