Experimental and numerical simulation study on mechanical properties of ceramsite concrete
Ceramsite concrete has the characteristics of light weight and high strength,good thermal insulation performance and excel-lent seismic performance,and is used as a functional material in non-load-bearing structures.The basic mix ratio of ceramsite concrete was obtained by trial mix,and on this basis,the mechanical property test was carried out to study the influence of the replacement rate of pot-tery sand,the content of fly ash and the volume content of polypropylene fiber on the design of mix ratio of ceramsite concrete.The results show that when the replacement rate of pottery sand is 50%and the content of fly ash is 20%,the mechanical properties of ceramsite con-crete are better,lighter and stronger.Adding appropriate amount of polypropylene fiber can improve the brittleness characteristics of ceram-site concrete.A two-dimensional meso-model was established to numerically simulate the compressive strength,elastic modulus,and com-pressive stress-strain full curve of ceramsite concrete,and compared with the test results.The established two-dimensional meso-model is reliable and can be used to predict the basic mechanical properties of ceramsite concrete.
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