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工程科学与技术:2022,54(2):73-80
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废玻璃混凝土最优复掺方式及耐高温性能研究
(四川大学 建筑与环境学院 深地科学与工程教育部重点实验室, 四川 成都 610065)
Optimal Compounding Method and High Temperature Resistance of Waste Glass Concrete
(Key Lab. of Deep Underground Sci. and Eng. for Ministry of Edu., College of Architecture and Environment, Sichuan Univ., Chengdu 610065, China)
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投稿时间:2021-02-10    修订日期:2021-05-31
中文摘要: 目前将废玻璃进行填埋处理不仅污染了环境,也是对资源的浪费。将固废物进行资源化利用,实现循环经济是可持续发展战略的重要内容。为提高废玻璃利用率,选取废玻璃粉作为辅助胶凝材料取代混凝土中的部分水泥,同时废玻璃作为粗、细集料取代混凝土中的部分石子、河砂,研究其复掺方式对再生混凝土抗压强度的影响,并确定最优掺加方式。在此基础上,进一步试验研究废玻璃再生混凝土的力学性能,进行劈裂抗拉、抗折、轴心抗压试验,并探讨废玻璃对混凝土耐高温性能的影响。研究表明,废玻璃粉、废玻璃粗集料、废玻璃细集料掺量(质量比)分别为0、25%、25%,再生混凝土抗压强度达到最大值53.43 MPa,劈裂抗拉强度较普通混凝土高8.52%,抗折强度较普通混凝土高1.47%,轴心抗压强度较普通混凝土低19.17%;再生混凝土强度保持率随受热温度的升高而降低,废玻璃的掺入对500~900 ℃高温后混凝土的强度保存有明显的改善作用。
Abstract:Currently, the most common treatment method of waste glass is landfill disposal, which both causes pollution to the environment and wastes resources. As a result, realizing the re-utilization of solid waste and recycling economy becomes the important parts of sustainable development strategy. To improve the utilization rate of waste glass, waste glass powder was taken to replace part of the cement in concrete as supplementary cementitious material, while waste glass was applied to replace part of the stone and river sand as coarse and fine aggregate. In this way, the effect of its compounding method on the compressive strength of recycled concrete could be studied, thus determining optimal blending method. After that, the mechanical properties of recycled concrete with waste glass were further studied by conducting different experiments, such as splitting tensile, anti-flexural and axial compressive tests. Simultaneously, the effect of waste glass on the high temperature resistance of concrete was also discussed in detail. According to the results, the compressive strength of recycled concrete reached the maximum value of 53.43 MPa with 0, 25% and 25% (mass ratio) of waste glass powder, waste glass coarse aggregate and waste glass fine aggregate respectively, and the splitting tensile strength was 8.52% higher than that of ordinary concrete, the flexural strength was 1.47% higher than that of ordinary concrete, and the axial compressive strength was 19.17% lower than that of ordinary concrete; the strength of recycled concrete retention rate decreased with the growing of heated temperature, and the incorporation of waste glass had a significant improvement on the strength preservation of concrete after high temperature from 500 ℃ to 900 ℃.
文章编号:202100141     中图分类号:TU528    文献标志码:
基金项目:国家自然科学基金项目(51678379);国家重点研发计划项目(2018YFC1508802)
作者简介:第一作者:李碧雄(1970-),女,教授,博士.研究方向:固废物资源化利用.E-mail:libix@126.com
引用文本:
李碧雄,张治博,朱亚阁,刘星.废玻璃混凝土最优复掺方式及耐高温性能研究[J].工程科学与技术,2022,54(2):73-80.
LI Bixiong,ZHANG Zhibo,ZHU Yage,LIU Xing.Optimal Compounding Method and High Temperature Resistance of Waste Glass Concrete[J].Advanced Engineering Sciences,2022,54(2):73-80.