Compressive performance analysis of carbon fiber reactive powder concrete under low temperature curing
In order to explore the compression performance of carbon fiber reactive powder concrete under low temperature curing conditions,uniaxial compression tests were carried out on 48 cube test blocks and 48 prism test blocks with curing temperature and carbon fiber content as control variables.The stress process and failure mode of the test blocks were analyzed,and the effects of the two on the cube compressive strength,prism compressive strength,elastic modulus and Poisson's ratio of reactive powder concrete(RPC)were investigated.The results show that when the curing temperature is the same,the addition of carbon fiber improves the brittle failure characteristics of RPC to a certain extent,and significantly improves the mechanical properties of RPC.When the carbon fiber content is 1％,RPC shows the best compressive mechanical properties.When the carbon fiber content is consistent,the mechanical properties of RPC decrease with the decrease of curing temperature.Based on the experimental data,the calculation formula of the cube compressive strength of carbon fiber RPC with the change of curing temperature is proposed,and the relationship between the cube compressive strength,the elastic modulus and the prism compressive strength is fitted.The normalized stress-strain equation of carbon fiber RPC under low temperature curing is established by using dimensionless coordinate system,which can provide theoretical basis and design reference for the engineering application of carbon fiber reactive powder concrete under low temperature environment.
万方数据
维普
