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Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Title : 大连理工大学（土木水力学院） 建筑材料研究所 所长 大连理工大学建筑能源技术研究中心 主任 辽宁省复合材料学会常务副理事长兼秘书长 政协辽宁省委员会委员 “建筑技术与应用”“混凝土”和“国外连建材科技“等杂志编委
Title of Paper:Optimization of Coarse Aggregate Content based on Efficacy Coefficient Method
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Date of Publication:2011-04-01
Journal:JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
Included Journals:SCIE、EI、ISTIC
Volume:26
Issue:2
Page Number:330-335
ISSN No.:1000-2413
Key Words:coarse aggregate content; workability; strength; durability; efficacy coefficient method
Abstract: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.
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