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材料导报  2020, Vol. 34 Issue (Z2): 618-622    
  高分子与聚合物基复合材料 |
复掺膨胀剂和纤维对混凝土性能的影响
卢京宇1, 王林1, 雍涵1, 王佩勋2, 李超2
1 北京建筑大学土木与交通工程学院,北京 102616
2 中铁二局第四工程有限公司,成都 610300
Influence of Composite Expansive Agent and Fiber on the Performance of Concrete
LU Jingyu1, WANG Lin1, YONG Han1, WANG Peixun2, LI Chao2
1 College of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102616, China
2 China Railway ERJU 4th Engineering Co.,LTD, Chengdu 610300, China
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摘要 依据北京地铁7号线东延环球影城地铁站建设工程,探究HCSA膨胀剂和聚丙烯纤维复掺的最佳配比及两者复掺对钢筋混凝土板构件性能的影响。依据正交设计试验方法控制HCSA膨胀剂掺量分别为6%、8%、10%、12%、14%,聚丙烯纤维掺量分别为0.6 kg/m3、0.9 kg/m3、1.2 kg/m3、1.5 kg/m3、1.8 kg/m3。研究结果显示:HCSA膨胀剂掺量10%、聚丙烯纤维掺量0.9 kg/m3时,能够有效补偿混凝土收缩,混凝土28 d抗压强度提升12.6%,14 d抗折强度提升23.2%,水中14 d限制膨胀率为3.2×10-4;在混凝土构件中,钢筋混凝土板的极限承载力提升3.8%;混凝土开裂时最大挠度提升51.2%。复掺膨胀剂及纤维能够改善板内应力分布,提升钢筋混凝土板的极限承载力及抗弯性能。
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卢京宇
王林
雍涵
王佩勋
李超
关键词:  HCSA膨胀剂  聚丙烯纤维  补偿收缩混凝土  承载力  抗弯性能    
Abstract: The study is based on the construction project of Universal Studios metro station along the east of Beijing Metro Line 7, to explore the best mix proportion of HCSA expansion agent and polypropylene fiber when they are mixed together and the influence of the mixture on the performance of reinforced concrete one-way slab. According to the orthogonal design method, the dosage of HCSA expansion agent is 6%, 8%, 10%, 12% and 14% respectively, and the dosage of polypropylene fiber is 0.6 kg/m3, 0.9 kg/m3, 1.2 kg/m3, 1.5 kg/m3 and 1.8 kg/m3 respectively. The best mix proportion and the effects on the concrete slab performance are studied. The results show that when HCSA expansion agent content is 10% and polypropylene fiber content is 0.9 kg/m3, the shrinkage of concrete can be effectively compensated, the 28 d compressive strength of concrete increase 12.6%, the 14 d flexural strength increase 23.2%, and the 14 d limited expansion rate underwater is 3.2×10-4. In the concrete slab, the ultimate bearing capacity of reinforced concrete slab is increased by 3.8% and the deflection is increased by 51.2% when the concrete cracks. The mix of expansive agent and fiber can improve the stress distribution, the ultimate bearing capacity and flexural property of concrete slab.
Key words:  HCSA expansive agent    polypropylene fiber    shrinkage compensating concrete    bearing capacity    flexural property
               出版日期:  2020-11-25      发布日期:  2021-01-08
ZTFLH:  TU528  
基金资助: 北京建筑大学基本业务经费(ZF15063);住建部科技项目(2015-K4-025);北京建筑大学博士基金(ZF14038)
通讯作者:  wangling@bucea.edu.cn   
作者简介:  卢京宇,硕士研究生,就读于北京建筑大学土木与交通工程学院建筑材料专业。王林,北京建筑大学副教授,在清华大学获得硕士学位,在北京中国矿业大学获得博士学位。现任教于北京建筑大学。以第一作者身份发表学术论文10 余篇,申请发明专利3 项。主持包括国家自然科学基金项目、北京市自然科学基金项目及建设部相关项目等,主要研究方向为水泥基材料。
引用本文:    
卢京宇, 王林, 雍涵, 王佩勋, 李超. 复掺膨胀剂和纤维对混凝土性能的影响[J]. 材料导报, 2020, 34(Z2): 618-622.
LU Jingyu, WANG Lin, YONG Han, WANG Peixun, LI Chao. Influence of Composite Expansive Agent and Fiber on the Performance of Concrete. Materials Reports, 2020, 34(Z2): 618-622.
链接本文:  
http://www.mater-rep.com/CN/  或          http://www.mater-rep.com/CN/Y2020/V34/IZ2/618
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