碱激发矿渣/粉煤灰多孔混凝土基本性能试验研究

材料导报

2020, Vol. 34

Issue (Z2): 299-303

无机非金属及其复合材料

碱激发矿渣/粉煤灰多孔混凝土基本性能试验研究

卞立波, 董申, 陶志

北京建筑大学土木与交通工程学院,北京100044

Basic Properties of Alkali Activated Slag/Fly Ash Pervious Concrete

BIAN Libo, DONG Shen, TAO Zhi

School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture, Beijing 100044, China

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摘要用氢氧化钠及水玻璃作为碱激发剂来激发矿粉/粉煤灰,制备以矿粉/粉煤灰为胶材的多孔混凝土。对比不同碱当量、激发剂模数、设计空隙率对多孔混凝土一定龄期下的力学性能、透水性能的影响。研究结果表明,随着碱激发剂模数、碱当量的增加,各龄期抗压强度和抗折强度均呈现先增加后降低的趋势。且设计空隙率25%,模数为1.5,碱当量为6.0%,抗压强度达到最大值23.4 MPa,抗折强度为3.1 MPa,碱激发矿渣/粉煤灰多孔混凝土与浆体力学性能有显著的相关性;多孔混凝土总体透水系数10 mm/s(设计空隙率25%)以上,设计空隙率为15%,试件抗压强度可达28.3 MPa,透水系数达4.3 mm/s。

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关键词: 多孔混凝土抗压强度空隙率透水系数

Abstract: Pervious concrete with slag/fly ash as rubber material was prepared by using sodium hydroxide and sodium silicate as alkali activator. The effects of different alkali equivalent, activator modulus and designed porosity on the mechanical properties and water permeability of per-vious concrete at a certain age were compared. The results showed that the compressive strength and flexural strength increased at first and then decreased with the increase of alkali activator modulus and alkali equivalent. The designed porosity is 25%, modulus is 1.5, alkali equivalent is 6.0%, compressive strength is 23.4 MPa, flexural strength is 3.1 MPa, alkali-activated slag/fly ash pervious concrete has significant correlation with mechanical properties of slurry. The overall permeability of pervious concrete is 10 mm/s, the designed porosity is more than 25%, the designed porosity is 15%, the compressive strength is 28.3 MPa, the permeability is 4.3 mm/s.

Key words: pervious concrete compressive strength porosity permeability

出版日期: 2020-11-25 发布日期: 2021-01-08

ZTFLH:

TU528

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, 董申, 陶志. 碱激发矿渣/粉煤灰多孔混凝土基本性能试验研究[J]. 材料导报, 2020, 34(Z2): 299-303.
BIAN Libo, DONG Shen, TAO Zhi. Basic Properties of Alkali Activated Slag/Fly Ash Pervious Concrete. Materials Reports, 2020, 34(Z2): 299-303.

链接本文:

http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2020/V34/IZ2/299

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