Mix design of wearable cement concrete based on the fuzzy orthogonal experiment

The wear resistance of concrete is helpful to endure the skidding of concrete pavement in an acceptable length of time. In order to produce the concrete with wear resistance in advance, the orthogonal experiment was design take into account water-cement ratio, the cement content, the maximum particle-size of aggregate, sand ratio. The experiment of compressive strength, flexural strength, slump, wear loss was done. And the experiments results were analyzed by the method of fuzzy orthogonal. Taking the value of fuzzy comprehensive evaluation as the target function, mix design of wearable concrete is optimized based on the multiple target membership function of strength, workability and wear resistance. The results show that the influence of factors on the comprehensive performance for wearable concrete in order is cement content, the maximum particle-size of aggregate, water-cement ratio, sand ratio. The comprehensive evaluation value is largest when water-cement ratio is 0.38, the cement content is 380kg/m³ and the maximum particle-size of aggregate is 20mm and sand ratio is 34%. Therefore the best combination can be regard as the optimal benchmark mix of wearable concrete.