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材料导报  2020, Vol. 34 Issue (Z2): 246-249    
  无机非金属及其复合材料 |
不同吸附性粉体对混凝土性能的影响
卞立波, 陶志
北京建筑大学土木与交通工程学院,北京 100044
Influence of Different Adsorptive Powders on Concrete Performance
BIAN Libo, TAO Zhi
School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044,China
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摘要 为明确不同吸附性粉体材料对水泥基材料的影响,本实验研究了石灰石粉、凝灰岩石粉、蒙脱土在掺量为20%、40%时对混凝土工作性能、力学性能及耐久性的影响。实验结果表明:与基准组相比,蒙脱土使得减水剂的用量增大6~8倍,C30和C50试件的28 d抗压强度分别降低38.4%与54.1%,干燥收缩率增大1.99倍,抗碳化性能以及抗氯离子渗透性均显著降低。凝灰岩石粉使试件减水剂用量增大36.7%~64.5%,C30和C50试件的28 d抗压强度分别降低7.4%与15.9%,干燥收缩率增大1.44倍,抗碳化性能以及抗氯离子渗透性均无明显影响。石灰石粉使减水剂用量相对基准组变化幅度为-32.4%~30.8%,C30和C50试件的28 d抗压强度分别降低18.3%与13%,干燥收缩率与基准组接近,抗氯离子渗透能力提升约12.9%。
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卞立波
陶志
关键词:  蒙脱土  碳化  收缩  抗氯离子渗透    
Abstract: To clarify the influence of different absorbent powder materials on cement-based materials,this paper studies the influence of limestone powder, tuff powder, and montmorillonite at 20% and 40% on the working performance, mechanical properties and durability of concrete. The experimental results show that compared with the benchmark group, the montmorillonite increased the amount of polycarboxylate water-reducing agent by 6-8 times, and the 28 d compressive strength decreased by 38.4% and 54.1% respectively, the drying shrinkage rate increased by 1.99 times, the carbonization resistance and the chloride ion permeability were significantly reduced. Tuff powder increased the amount of water redu-cing agent by 36.7%—64.5%, reduced 28 d compressive strength by 7.4% and 15.9%, respectively, increased drying shrinkage by 1.44 times, there is no obvious impact on resist carbonization and resist chloride ion permeability. Limestone powder changed the amount of water-reducing agent by -32.4%—30.8%, reduced the 28 d compressive strength by 18.3% and 13% respectively, the drying shrinkage rate was close to the benchmark group, and the resistance to chloride ion penetration increased by about 12.9%.
Key words:  montmorillonite    carbonization    shrink    resistance to chloride ion penetration
               出版日期:  2020-11-25      发布日期:  2021-01-08
ZTFLH:  TU528.1  
基金资助: 北京市教委科研计划一般项目(KM201710016016);北京建筑大学市属高校基本业务费专项资金-QN青年科研创新专项(X18260)
通讯作者:  bianlibo@bucea.edu.cn   
作者简介:  卞立波,2016年6月毕业于北京科技大学,获得工学博士学位。现为北京建筑大学副教授,讲授《建筑材料测试技术》《土木工程材料》及无机非金属材料工程专业课程中的试验课程。主持北京市自然基金、北京市教委项目、科技部重点研发技术、企业委托项目多项。主要研究领域为多元复合新型胶凝材料技术、多孔质混凝土混凝土技术和特种及新型建材。授权/申请发明专利16项,实用新型7项,发表相关论文20余篇。
引用本文:    
卞立波, 陶志. 不同吸附性粉体对混凝土性能的影响[J]. 材料导报, 2020, 34(Z2): 246-249.
BIAN Libo, TAO Zhi. Influence of Different Adsorptive Powders on Concrete Performance. Materials Reports, 2020, 34(Z2): 246-249.
链接本文:  
http://www.mater-rep.com/CN/  或          http://www.mater-rep.com/CN/Y2020/V34/IZ2/246
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