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材料导报  2021, Vol. 35 Issue (z2): 218-223    
  无机非金属及其复合材料 |
煤矸石粗骨料-地聚物混凝土的力学与耐久性能研究
葛洁雅, 朱红光, 李宗徽, 李为健, 沈正艳, 侯金良, 杨森
中国矿业大学(北京)力学与建筑工程学院,北京 100083
Study on Mechanics and Durability of Coal Gangue Coarse Aggregate-Geopolymer Concrete
GE Jieya, ZHU Hongguang, LI Zonghui, LI Weijian, SHEN Zhengyan, HOU Jinliang, YANG Sen
School of Mechanics & Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
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摘要 将原状和煅烧的煤矸石粗骨料分别按不同掺量替代碎石,制备煤矸石粗骨料-地聚物混凝土,分析了煤矸石掺入量、煅烧与否对混凝土28 d抗压强度、抗氯离子渗透性能、抗冻性能的影响,并探究混凝土性能指标之间的相关性、煤矸石粗骨料的合适掺量及其煅烧的必要性。此外,借助扫描电镜探讨其内部机理。结果显示:随着煤矸石粗骨料掺入量增加,煤矸石粗骨料地聚物混凝土的抗压性能、抗渗性能、抗冻性能均会在不同程度上减弱,其中以抗冻性能的影响最为显著;与原状煤矸石粗骨料地聚物混凝土相比,相同煤矸石掺量下的煅烧煤矸石粗骨料地聚物混凝土在抗压强度上展现出很大的优势,抗氯离子渗透性能不如原状煤矸石地聚物混凝土,抗冻性能与原状粗骨料地聚物混凝土差别不大;煤矸石粗骨料合适掺量的阈值为50%。
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葛洁雅
朱红光
李宗徽
李为健
沈正艳
侯金良
杨森
关键词:  煤矸石  地聚物  混凝土  抗压强度  氯离子渗透  抗冻性能    
Abstract: The original and calcined coal gangue coarse aggregates were replaced with different amounts of crushed stone, respectively, to prepare coal gangue coarse aggregate-geopolymer concrete. Through experiments, the influences of the content of gangue and whether it was calcined or not on the compressive strength, chloride ion permeability and freezing-thawing resistance of concrete for 28 d were analyzed, and the correlation between the performance indexes of concrete, the appropriate content of gangue coarse aggregate and the necessity of calcination were explored. In addition, The internal mechanism was discussed by means of the scanning electron microscope(SEM). The results show that with the increase of the amount of coal gangue coarse aggregate, the compressive property, impermeability and freezing-thawing resistance of coal gangue coarse aggregate geopolymer concrete will be weakened to different degrees, among which the freezing-thawing resistance is the most significant. Compared with the raw gangue coarse aggregate ground polymer concrete, the calcined gangue coarse aggregate ground polymer concrete with the same coal gangue content shows great advantages in compressive strength, the chloride ion permeability resistance of the raw gangue ground polymer concrete is not as good as that of the original gangue ground polymer concrete, and the frost resistance of the raw gangue ground polymer concrete is not much different from that of the original coarse aggregate.
Key words:  coal gangue    geopolymer    concrete    compressive strength    chloride penetration    frost resistance
                    发布日期:  2021-12-09
ZTFLH:  TU528.59  
基金资助: 北京市自然科学基金(8164061);国家自然科学基金(51578539);中央高校基本科研业务费优秀青年项目(2020YQLJ03);中国矿业大学(北京)“越崎青年学者”
通讯作者:  zhg@cumtb.edu.cn   
作者简介:  葛洁雅,2019年9月就读于中国矿业大学(北京)结构工程专业,硕士研究生,主要从事混凝土耐久性领域的研究。
朱红光,中国矿业大学(北京)副教授,越崎青年学者,北京市级虚拟仿真实验项目负责人。2012年博士毕业于中国矿业大学(北京)工程力学专业留校至今。在国内外学术期刊上发表论文50余篇,获8项国家发明及实用新型专利。研究方向主要为固废混凝土的数字化设计与长期性能研究。主持和参与国家重大基础研发计划3项、国家自然科学基金2项、北京市自然科学基金青年项目1项、北京市新型墙材专项基金支持项目1项、国家重点实验室开放课题3项等。
引用本文:    
葛洁雅, 朱红光, 李宗徽, 李为健, 沈正艳, 侯金良, 杨森. 煤矸石粗骨料-地聚物混凝土的力学与耐久性能研究[J]. 材料导报, 2021, 35(z2): 218-223.
GE Jieya, ZHU Hongguang, LI Zonghui, LI Weijian, SHEN Zhengyan, HOU Jinliang, YANG Sen. Study on Mechanics and Durability of Coal Gangue Coarse Aggregate-Geopolymer Concrete. Materials Reports, 2021, 35(z2): 218-223.
链接本文:  
http://www.mater-rep.com/CN/  或          http://www.mater-rep.com/CN/Y2021/V35/Iz2/218
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