Mechanical properties of concrete containing glass sand and rice husk ash: Fid-Bau Portal

Mechanical properties of concrete containing glass sand and rice husk ash

Su, Qiang / Xu, Jinming

Highlights • Glass sand replaces the fine aggregate in concrete, and rice husk ash replaces the cementitious material in concrete. • Glass sand reduces the compressive strength of concrete. • After 28 days of curing, rice husk ash increased the strength of concrete. • Rice husk ash enhances the toughness of glass sand concrete.

Abstract The use of glass sand and rice husk ash in concrete production can not only save natural river sand resources and promote the recycling of waste, but also reduce or even eliminate the alkali–silica reaction produced by glass sand and cement slurry through the pozzolanic effect of rice husk ash. The mechanical properties of glass sand concrete and glass sand concrete containing rice husk ash were tested through a series of experiments to study the applicability of adding glass sand/rice husk ash to concrete. The experimental results show that the addition of glass sand reduces the water absorption and compressive strength of ordinary concrete but improves the splitting tensile strength, shear strength, and cyclic compression performance of ordinary concrete. Meanwhile, rice husk ash can greatly enhance the later compressive strength and splitting tensile strength of glass sand concrete. The optimal replacement rate is 15%—replacement rates of 30% and 45% are unsuitable for structural concrete. In addition, although rice husk ash reduces the shear strength and cyclic compression performance of glass sand concrete, rice husk ash can effectively enhance the crack resistance of glass sand concrete. The results of this study provide a reference of the mechanical properties of rice husk ash glass sand concrete and provide a basis for future research.