Analysis of influencing factors on compression strength and bending strength of recycled aggregate wall materials

In order to study the influence and mechanism of different experimental factor, which includes brick powder content, water-cement ratio, aggregate-cement ratio, lime content and aggregate replacement rate, on the compression strength and bending strength of recycled aggregate wall materials, an orthogonal experimental design method involving five factors and four factor levels is adopted for the mix design of recycled aggregate wall materials, the effect of each factor level on mix proportion of recycled aggregate wall materials and the difference between each factor levels are analyzed. The empirical relationship among mechanical property and factors of recycled aggregate wall materials is also proposed by using multivariate regression analysis. The experimental results indicate that water-cement ratio is the most principal and significant influencing factor on the compression strength and bending strength of recycled aggregate wall materials, and the most significant factor on bend-press ratio is the aggregate-cement ratio.