Study on the influence of material composition on the properties of permeable concrete
In order to explore the effects of water-ash ratio,PAN fiber,silicone ash and binder on the properties of permeable concrete,permeability coefficient and compressive strength,the four-factor three-level orthogonal test was designed,and the porosity,permeability coefficient and compressive strength were analyzed by the method of extreme difference and variance,and the order and optimal combina-tion of influencing factors of each performance index were obtained.The test results show that the water-ash ratio has the greatest influence on the performance of permeable concrete,and the porosity and permeability coefficient of the specimen group are generally large,the maximum values are 27.41％,18.89 mm/s,and the maximum compressive strength is 22.2 MPa.The best combination of permeable con-crete in the specimen group is:water-ash ratio 0.31,PAN fiber dosage 0.6％,silica ash dosage 8％,binder dosage 2％～3％.Compressive strength and permeability coefficient can be established by Balshin,Ryshkewitch,Hasselman three model functions and porosity,and the fitting effect is better,with the increase of porosity,the compressive strength shows a downward trend,and the permeability coefficient shows an upward trend.
permeable concretematerial compositionporosityorthogonal test
万方数据
维普
