Study on influencing factors of fair-faced concrete apparent effect based on uniform test method
The influence of water-binder ratio,cementitious materials content,mineral power content and sand ratio on the apparent effect of fair-faced concrete was studied by uniform test method.The method of quantitative evaluation of the apparent effect of fair-faced concrete was established by taking the color difference,porosity and crack rate of concrete surface as indexes.The equation of the influence of the mix ratio parameters of fair-faced concrete on the water effect was established by quadratic polynomial stepwise regression analysis,and the optimal mix ratio was obtained.The results show that the water-binder ratio has the greatest influence on the apparent effect of fair-faced concrete,followed by the amount of cementitious materials.The sand ratio mainly affects the surface porosity and surface crack rate of concrete,and the amount of mineral powder has no significant effect on the clear water effect.Under the condition of this paper,the best mix ratio of water-binder ratio is 0.43,the amount of cementitious material is 475kg/m3,the amount of mineral powder is 25％,and the sand ratio is 0.40.
万方数据
维普
