透水性砼配合比正交试验方法

Orthogonal Experiment on the Mixing Ratio of Porous Pervious Concrete Based on Compressive Strength

基于混凝土强度和透水性要求,根据现有实验室条件,运用相似原理和正交实验原理对C15透水性混凝土的配合比进行试验方法研究。采用3因素3水平均值相似正交法提出了研究水灰比、骨灰比、骨料粒径对混凝土空隙率、透水率和抗压强度影响的试验方法,根据透水性混凝土性能要求确定了试配强度、水泥用量、水灰比、粗集料用量。最后提出根据所建立的正交试验表,利用极差分析、方差分析和线性回归分析确定最优配合比和各因素显著性的方法。研究表明,该方法同样适合于分析不同因素、基于不同性质和目的的透水性混凝土配合比的设计。

Based on the requirements of strength and permeability of concrete, the authors apply similar theory and orthogonal experiment theory in the experiment on the mixing ratio of porous pervious concrete （PPC） C15 in accordance with the existing laboratory conditions. An orthogonal experiment of 3 levels and 3 factors is conducted to study the influence of mass ratio of water to cement, mass ratio of aggregate, particle size of aggregate on porosity, permeability and compressive strength of concrete. The experimental strength, amount of cement, mass ratio of water to cement, amount of coarse aggregate are determined according to the property requirements of PPC. Finally, optimal mixing ratio and significant factors are determined from the orthogonal table established by using analysis of range and variance and linear regression. The resuh obtained shows that the approach is also suitable for the analysis of mixing ratio design for different permeable concrete with different factor, properties and usage.