深圳大学学报（理工版）2024，Vol.41Issue(3)：367-376,10.DOI:10.3724/SP.J.1249.2024.03367
机制砂全再生粗骨料混凝土的力学性能
Mechanical properties of fully recycled coarse aggregate concrete with manufactured sand
摘要
Abstract
To investigate the influence of aggregate type,water-cement ratio,and stone powder content on the mechanical properties of concrete with manufactured sand and fully recycled coarse aggregate,we prepared specimens of fully recycled aggregate concrete with different stone powder mass fractions(5%,10%and 15%)and various water-cement ratios(0.50,0.37 and 0.32).A total of 72 cubic specimens were used for compressive strength tests,and 72 cylindrical specimens for elastic modulus tests.The results indicate that an appropriate stone powder content can effectively enhance the mechanical properties of recycled aggregate concrete,but the optimal stone powder content varies under different water-cement ratios.When the water-cement ratio and stone powder content interact,the mechanical properties of recycled concrete are optimal at a water-cement ratio of 0.32 and a stone powder mass fraction of 15%.Moreover,a relationship model between the compressive strength and elastic modulus of concrete with manufactured sand and fully recycled coarse aggregate and the water-cement ratio&stone powder content was established.The standard deviation and dispersion coefficient of the calculated results do not exceed 5%,indicating good model accuracy.The research results can provide a theoretical basis for enhancing the mechanical properties of recycled aggregate concrete and its engineering application.关键词
混凝土/机制砂/全再生粗骨料/石粉/水灰比/抗压强度/弹性模量Key words
concrete/manufactured sand/fully recycled coarse aggregate/stone powder/water cement ratio/compres-sive strength/elastic modulus分类
建筑与水利引用本文复制引用
李阳,管民生,王刚,周志祥..机制砂全再生粗骨料混凝土的力学性能[J].深圳大学学报（理工版）,2024,41(3):367-376,10.基金项目
National Natural Science Foundation of China(52278195) 国家自然科学基金资助项目(52278195) （52278195）
