Experimental study on stress-strain curve of EPS concrete
EPS concrete is a new type of lightweight and thermal insulation wall material.Through the axial compression test of three groups of EPS concrete samples with different density grades,the failure morphology,mechanical properties and stress-strain curves are analyzed.The results show that the failure process of EPS concrete has a certain toughness.With the increase of density grade,the concrete stiffness increases,the resistance to elastic deformation increases,the brittleness increases,and the failure is more rapid.The stress-strain curve of EPS concrete under axial compression is divided into ascending segment,descending segment and oblique straight segment.On the basis of experimental research and theoretical analysis,the stress-strain curve function expression is proposed by fitting the correlation coefficient.The fitting result is in good agreement with the test curve,which provides a reference for the subsequent relevant research of EPS concrete and is of great significance.
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