Physical-mechanical properties of fly ash/GGBFS geopolymer composites with recycled aggregates

被引:151
作者
Hu, Yong [1 ,2 ]
Tang, Zhuo [2 ]
Li, Wengui [2 ]
Li, Yunan [3 ]
Tam, Vivian W. Y. [4 ]
机构
[1] Wenhua Coll, Dept Civil Engn, Wuhan 430074, Hubei, Peoples R China
[2] Univ Technol Sydney, Ctr Built Infrastruct Res, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia
[3] China Univ Geosci, Fac Engn, Wuhan 430074, Hubei, Peoples R China
[4] Western Sydney Univ, Sch Comp Engn & Math, Penrith, NSW 2751, Australia
基金
澳大利亚研究理事会;
关键词
Recycled coarse aggregate; Construction demolition waste (C&DW); Geopolymer composites; Mechanical properties; Microstructures; ALKALI-ACTIVATED MATERIALS; ASH-BASED GEOPOLYMER; COMPRESSIVE STRENGTH; DURABILITY PROPERTIES; DEMOLITION WASTE; CONCRETE; SLAG; CONSTRUCTION; WORKABILITY; CEMENT;
D O I
10.1016/j.conbuildmat.2019.07.211
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The properties of fly ash and ground granulated blast furnace slag (GGBFS) combination based geopolymer composites containing recycled aggregate are investigated in this study, which obtained from construction and demolition wastes. The effects of recycled aggregate replacement and GGBFS inclusion on the physical and mechanical properties of geopolymer composites were investigated in this study. The scanning electron microscopic (SEM) were conducted to provide a thorough insight into the characterization of microstructures. The results reveal that using recycled aggregate has an insignificant impact on workability and setting time, while it causes a reduction in physical and mechanical properties. The inclusion of GGBFS reduces workability and setting time. However, improved physical and mechanical properties can be achieved in the geopolymer composites after the incorporation of GGBFS, and this effect is more prominent in the geopolymer composites containing recycled aggregates. The water absorption and sorptivity exhibit a strong correlation with the volume of permeable voids of geopolymer composites. Besides, very good relationships were established between the compressive strength and other mechanical properties, and these relationships fitted reasonably well with the other predictions. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码:139 / 151
页数:13
相关论文
共 57 条
  • [1] Recycled aggregate from C&D waste & its use in concrete - A breakthrough towards sustainability in construction sector: A review
    Behera, Monalisa
    Bhattacharyya, S. K.
    Minocha, A. K.
    Deoliya, R.
    Maiti, S.
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2014, 68 : 501 - 516
  • [2] Durability of Alkali- Activated Materials: Progress and Perspectives
    Bernal, Susan A.
    Provis, John L.
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2014, 97 (04) : 997 - 1008
  • [3] Engineering and durability properties of concretes based on alkali-activated granulated blast furnace slag/metakaolin blends
    Bernal, Susan A.
    Mejia de Gutierrez, Ruby
    Provis, John L.
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2012, 33 : 99 - 108
  • [4] Mechanical and thermal characterisation of geopolymers based on silicate-activated metakaolin/slag blends
    Bernal, Susan A.
    Rodriguez, Erich D.
    Mejia de Gutierrez, Ruby
    Gordillo, Marisol
    Provis, John L.
    [J]. JOURNAL OF MATERIALS SCIENCE, 2011, 46 (16) : 5477 - 5486
  • [5] Evolution of binder structure in sodium silicate-activated slag-metakaolin blends
    Bernal, Susan A.
    Provis, John L.
    Rose, Volker
    Mejia de Gutierrez, Ruby
    [J]. CEMENT & CONCRETE COMPOSITES, 2011, 33 (01) : 46 - 54
  • [6] Sustainable development and climate change initiatives
    Damtoft, J. S.
    Lukasik, J.
    Herfort, D.
    Sorrentino, D.
    Gartner, E. M.
    [J]. CEMENT AND CONCRETE RESEARCH, 2008, 38 (02) : 115 - 127
  • [7] The effects of ground granulated blast-furnace slag blending with fly ash and activator content on the workability and strength properties of geopolymer concrete cured at ambient temperature
    Deb, Partha Sarathi
    Nath, Pradip
    Sarker, Prabir Kumar
    [J]. MATERIALS & DESIGN, 2014, 62 : 32 - 39
  • [8] Enhancing mechanical and durability properties of recycled aggregate concrete
    Dimitriou, George
    Savva, Pericles
    Petrou, Michael F.
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2018, 158 : 228 - 235
  • [9] Mechanical properties of alkali-activated concrete: A state-of-the-art review
    Ding, Yao
    Dai, Jian-Guo
    Shi, Cai-Jun
    [J]. CONSTRUCTION AND BUILDING MATERIALS, 2016, 127 : 68 - 79
  • [10] Duxson P., 2001, J MATER SCI, V42, P10