Pore structure structure and chloride diffusivity of recycled aggregate concrete with nano-SiO2 and nano-TiO2

被引：151
作者：
Ying, Jingwei [1 ,2 ,3 ]
Zhou, Bin [1 ]
Xiao, Jianzhuang [1 ,4 ]
机构：
[1] Guangxi Univ, Coll Civil Engn & Architecture, Nanning 530004, Peoples R China
[2] Guangxi Univ, Minist Educ, Guangxi Key Lab Disaster Prevent & Engn Safety, Nanning 530004, Peoples R China
[3] Guangxi Univ, Minist Educ, Key Lab Disaster Prevent & Struct Safety, Nanning 530004, Peoples R China
[4] Tongji Univ, Dept Struct Engn, Shanghai 200092, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2017年 / 150卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Recycled aggregate concrete; Nanoparticles; Pore structure; Chloride diffusivity; Mechanical behavior; MERCURY INTRUSION POROSIMETRY; NANO-SILICA; MICROSTRUCTURE;
D O I：
10.1016/j.conbuildmat.2017.05.168
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Nano-SiO2 and nano-TiO2 particles were mixed into recycled aggregate concrete (RAC) to enhance its properties. Mercury intrusion porosimetry was used to test the pore structure of the mortar in RAC, and the rapid chloride migration instrument was selected to investigate the diffusivity of RAC. It is found that the,addition of nanoparticle refines the pore structure of RAC and enhances the resistance to chloride diffusivity of RAC. Furthermore, a three-phase composite sphere model for the matrix in RAC was proposed by considering the new mortar, old attached mortar and original aggregate as continuous phases. The three-phase model considering the microstructure of RAC was verified by experiment results, which can be applied to predict the chloride diffusivity of RAC with nanoparticles. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：49 / 55
页数：7
相关论文
共 32 条
  • [1] Mercury intrusion porosimetry and image analysis of cement-based materials
    Abell, AB
    Willis, KL
    Lange, DA
    [J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1999, 211 (01) : 39 - 44
  • [2] [Anonymous], 1999, NT Build 492, P1
  • [3] Construction Mo, 2006, STAND TECHN REQ TEST, P19
  • [4] Influence of kaolinite clay on the chloride diffusion property of cement-based materials
    Fan, Yingfang
    Zhang, Shiyi
    Kawashima, Shiho
    Shah, Surendra P.
    [J]. CEMENT & CONCRETE COMPOSITES, 2014, 45 : 117 - 124
  • [5] Effect of drying on cement-based materials pore structure as identified by mercury intrusion porosimetry -: A comparative study between oven-, vacuum-, and freeze-drying
    Gallé, C
    [J]. CEMENT AND CONCRETE RESEARCH, 2001, 31 (10) : 1467 - 1477
  • [6] Multiscale analytical/numerical theory of the diffusivity of concrete
    Garboczi, EJ
    Bentz, DP
    [J]. ADVANCED CEMENT BASED MATERIALS, 1998, 8 (02): : 77 - 88
  • [7] Porosity of recycled concrete with substitution of recycled concrete aggregate -: An experimental study
    Gómez-Soberón, JMV
    [J]. CEMENT AND CONCRETE RESEARCH, 2002, 32 (08) : 1301 - 1311
  • [8] Pore Structure and Influence of Recycled Aggregate Concrete on Drying Shrinkage
    Guo, Yuanchen
    Qian, Jueshi
    Wang, Xue
    [J]. MATHEMATICAL PROBLEMS IN ENGINEERING, 2013, 2013
  • [9] Physical Model of Drying Shrinkage of Recycled Aggregate Concrete
    Guo Yuanchen
    Wang Xue
    Qian Jueshi
    [J]. JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION, 2015, 30 (06): : 1260 - 1267
  • [10] Use of Nano-SiO2 to Improve Microstructure and Compressive Strength of Recycled Aggregate Concretes
    Hosseini, P.
    Booshehrian, A.
    Delkash, M.
    Ghavami, S.
    Zanjani, M. K.
    [J]. NANOTECHNOLOGY IN CONSTRUCTION 3, PROCEEDINGS, 2009, : 215 - +
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