The influence of RMA active cementitious material on the performance of tunnel pumping concrete is studied through experiments,and a demonstration application is carried out in a tunnel in Guangdong.The results show that when the content of RMA is 7％,the fresh workability of pumping concrete is significantly improved,the construction pumping performance is guaranteed,the water permeability and compressive strength of concrete are improved,the chloride ion diffusion coefficient is reduced,and the corrosion resistance of concrete is improved.In terms of engineering,the addition of 7％RMA active cementitious material improved thepumping performance of concrete during construction.Compared with the control group concrete,the 28d compressive strength increased by 12.9％,the permeability height decreased by 40％,the chloride ion diffusion coefficient decreased by 24.6％,and the effective diffusion coefficient grade was"low".
RMA active cementitious materialpumping concretedissolution performance
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