再生陶瓷混凝土抗压强度及弹性模量试验研究
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王伊(1994—),女,博士研究生,研究方向为钢新型混凝土组合结构。E-mail:wangyi2528@yeah.net。

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T528

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国家自然科学基金项目(51868020);江西省研究生创新资金项目(YC2021-B142);江西省自然科学基金重点项目(20192ACBL21002);江西省教育厅科学技术研究重点项目(GJJ210649)


Experimental Study on Compressive Strength and Elastic Modulus of Recycled Ceramic Concrete
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    摘要:

    目的】为研究不同再生陶瓷骨料类型和取代率对混凝土抗压强度和弹性模量的影响,利用再生陶瓷细骨料以 0、10%、 20%、30%、40%、50%、60%、70%、80%、90%和 100%取代率等质量替换天然河砂制作再生陶瓷细骨料混凝土(CRFC)。【方法】 在再生陶瓷细骨料全取代(100%)天然细骨料的基础上,采用再生陶瓷粗骨料等质量替换天然碎石制作再生陶瓷粗细骨料混凝土(CRC),研究 CRFC和 CRC的物理性能和力学性能,分析废弃墙地砖陶瓷作为混凝土再生骨料的可行性。【结果】研究表明:采用再生陶瓷细骨料取代天然细骨料配制的 CRFC 在和易性、抗压强度和弹性模量等性能方面与普通混凝土相差不大; CRC的抗压强度和弹性模量随再生陶瓷粗骨料取代率的增加而显著降低。【结论】废弃陶瓷砖可以作为粗、细骨料用于制备混凝土。采用再生陶瓷粗骨料时需要根据其吸水率加入附加用水以确保混凝土拌合物的和易性;界面过渡区的粘结强度和粗骨料类型是分别影响CRFC和CRC破坏形态的主要因素;再生陶瓷细骨料全部取代天然细骨料时,建议再生陶瓷粗骨料取代率小于 50%。

    Abstract:

    Objective】Recycled ceramic fine aggregate was used to replace natural river sand with a quality of 0, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100% replacement rate to create recycled ceramic fine aggregate concrete (CRFC) to investigate the effects of various types and replacement rates of recycled ceramic aggregate on the compressive strength and modulus of elasticity of concrete.【Method】To create recycled ceramic coarse and fine aggregate concrete (CRC), natural gravel was substituted based on the replacement rate of recycled ceramic fine aggregate (100% ) with natural fine aggregate. The physical and mechanical properties of CRFC and CRC were investigated, as well as the viability of using wasted tile ceramics as recycled concrete aggregate.【Result】The results show that: The workability, compressive strength, and elastic modulus of CRFC made with recycled ceramic fine aggregate are similar to those of normal concrete. As the replacement rate of recycled ceramic coarse aggregate increased, the compressive strength and elastic modulus of CRC dropped dramatically.【Conclusion】Waste ceramic bricks can be utilized as coarse and fine aggregate in concrete preparation. To ensure concrete workability while utilizing recycled ceramic coarse aggregate, additional water should be supplied by its water absorption rate. The bond strength in the interfacial transition zone and coarse aggregate type are the main factors influencing the failure patterns of CRFC and CRC, respectively. It is suggested that the replacement rate of recycled ceramic coarse aggregate is less than 50% when natural fine aggregate is totally replaced by recycled ceramic fine aggregate.

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王伊,黄宏,帅子坤,胡文斌.再生陶瓷混凝土抗压强度及弹性模量试验研究[J].华东交通大学学报,2024,41(1):38-45.
Wang Yi, Huang Hong, Shuai Zikun, Hu Wenbin. Experimental Study on Compressive Strength and Elastic Modulus of Recycled Ceramic Concrete[J]. JOURNAL OF EAST CHINA JIAOTONG UNIVERSTTY,2024,41(1):38-45

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  • 收稿日期:2023-03-09
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  • 在线发布日期: 2024-03-20
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