Effect of glass powder on mechanical properties and durability of modified polystyrene particle concrete

In this paper, glass powder (GP) was used as a partial replacement of cement and the effects of different levels of GP replacement on the mechanical and durability properties of modified polystyrene particle concrete were investigated, and the mechanism of action was analysed using x-ray diffraction, scanning electron microscopy and CT techniques. The study results show that GP reduces the early strength of modified polystyrene particle concrete. When the substitution rate of GP is not more than 20%, it can improve the late compressive strength and splitting tensile strength of modified polystyrene granular concrete and enhance the chloride ion permeability and frost resistance. When the substitution rate of GP reaches 30% and above, it is unfavourable to the mechanical properties and durability of modified polystyrene granular concrete.20% is the best substitution rate of GP in modified polystyrene grainy concrete. The thermal conductivity of modified polystyrene particulate concrete tends to decrease and then increase with the increase of the GP substitution rate. The best thermal performance is achieved when the GP substitution rate is 10%. It can be attributed to the fact that the appropriate amount of GP can improve the internal microstructure of the modified polystyrene particle concrete and optimise the pore structure.