Study on the Failure Theory of EPS Lightweight Aggregate Concrete

EPS lightweight aggregate concrete,a good wall-making insulation material,is dense and cheap.But our knowledge of EPS lightweight aggregate concrete′s compressive failure theory is very limited,far less than that of ordinary concrete,which limits the application of EPS concrete.In this paper,the best mix-ing design of EPS lightweight aggregate concrete has been done,and the mechanical properties of EPS light-weight aggregate concrete have been further analyzed.The orthogonal experiment is applied and the infu-cence of four factors,namely,cement,water,EPS aggregate and sands on the function of EPS light weight aggregate is systematically analyzed.The experiment tests and analyzes the mechanical property of different mixing design.The results show that the strength of EPS lightweight aggregate concrete mainly comes from that of cement,moreover,good rheological ability is an important factor to ensure good strength.The failure of EPS lightweight aggregate concrete can be divided into elastic,elastic-plastic and failure stages.As the EPS aggregate has very low strength,the concrete strength decreases sharply after the failure.These results provide a basic direction for the developments and applications of EPS lightweight aggregate.