Optimization of coarse aggregate content based on efficacy coefficient method
Optimization of coarse aggregate content based on efficacy coefficient method
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DOI：
10.1007/s11595-011-0224-2
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发表时间：
2011-04
期刊：
影响因子：
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通讯作者：
Zhenshuang Wang;Li-jiu Wang;H. Su;Zhenglong Cui
中科院分区：
文献类型：
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作者：
Zhenshuang Wang;Li-jiu Wang;H. Su;Zhenglong Cui
研究了粗骨料掺量对混凝土性能的影响。从骨架混凝土理论来看，除粗骨料掺量外，其余6组混凝土均以相同比例生产，粗骨料掺量分别为0%、40%、50%、60%、75%、80%。通过坍落度、抗压、抗折强度、弹性模量和透水性试验，研究了粗骨料含量对混凝土的影响。试验结果表明，坍落度随粗骨料掺量的增加而减小，抗压强度、弹性模量和抗折强度随粗骨料掺量的增加而增大，透水性能随粗骨料掺量的增加而减小，在75%以前随粗集料掺量的增加而增大。基于功效系数法，建立了混凝土工作性、强度、耐久性和经济性指标体系，对混凝土中粗骨料的掺量进行了优化。优化结果表明，当粗集料掺量为60%时，系统效能系数达到0.89，表现出较好的综合性能。
The influence of coarse aggregate content on concrete properties was investigated. From the perspective of Frame Concrete Theory, six groups concrete were produced with the same proportion except for coarse aggregate content, with coarse aggregate content of 0%, 40%, 50%, 60%, 75%, and 80%, respectively. Slump, compressive and flexural tensile strengths, elastic modulus, and water penetration were tested to research the effect of coarse aggregate content on concrete. The experimental results reveal that slump reduces with increasing of coarse aggregate content, while compressive strength, elastic modulus and flexural tensile strength increase with the coarse aggregate content increasing, and water penetration reduces with coarse aggregate content increasing before 75% then increased. Workability, strength, durability and economical indexes system were established to optimize the coarse aggregate content in concrete based on efficacy coefficient method. The optimization results show that when coarse aggregate content is 60%, the system efficacy coefficient reaches to 0.89, and it expresses the better comprehensive performance.