In order to make the mechanical properties of ecological concrete meet the requirements and improve its pore environment,this paper designs an orthogonal test with interaction,and uses the sensitivity analysis method of orthogonal test to explore the effects of silica fume,styrene-acrylic emulsion and urea,on the compressive strength,porosity,pH value of pore environment and cumulative release rate of total nitrogen of ecological concrete,and construct multiple regression equations to verify reliability and obtain the optimal mix ratio.The results show that silica fume,urea and their interaction have significant effects on compressive strength and porosity.Silica fume and urea are beneficial to reduce the pH value in the pores,and styrene-acrylic emulsion will affect the reduction effect of silica fume.Urea can improve the cumulative release rate of total nitrogen,silica fume and styrene-acrylic emulsion can play a restrictive role,and the effect of styrene-acrylic emulsion is more obvious.The similarity between the fitting curve of the regression equation and the curve shape and trend of the test results,the optimal mix proportion of ecological concrete is 9％silica fume,5％styrene-acrylic emulsion and 10％urea.
维普
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