Experimental research on the compressive strength influencing factors of expanded polystyrene sheet silt mixed lightweight soil material

Abstract

The expanded polystyrene sheet silt mixed lightweight soil material is composed of silt, expanded polystyrene sheet and curing agent, this synthetic filling material has the advantages of lightweight and high strength. The system analysis about the strength characteristics for this material is lacked now, in view of this, in this paper, the factors of expanded polystyrene sheet content, cement content, adding water amount and compaction energy were studied to discuss their effect on the compressive strength by laboratory test. It can be concluded that the contents of the expanded polystyrene sheet and cement are the main influencing factors for the compressive strength of this material, besides, it is also found that the effect of other factors on strength is little; therefore, it is very important to choose a suitable mixing ratio for this synthetic material. The relation between compressive strength and curing time was researched, and it is shown that it could be forecasted by the grey Verhulst model well.