文献类型：期刊文献

英文题名：Development of sustainable geopolymer materials made with ground geopolymer waste powder as renewable binder up to 100%

作者：Wu, Huixia[1];Liang, Chaofeng[1];Yang, Dingyi[2];Ma, Zhiming[2]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[2]Yangzhou Univ, Coll Architectural Sci & Engn, Yangzhou 225127, Peoples R China

年份：2023

卷号：400

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：SCI-EXPANDED(收录号：WOS:001088202100001)、、EI(收录号：20233614690332)、Scopus(收录号：2-s2.0-85169838467)、WOS

基金：The authors gratefully acknowledge substantial support of ongoing projects titled National Natural Science Foundation of China (52008364) and Natural Science Foundation of Jiangsu Province (BK20200957) .

语种：英文

外文关键词：Geopolymer waste powder; Renewable binder; Sustainable geopolymer; Micro -structure; Strength and water transport

外文摘要：Reusing ground geopolymer waste powder (GWP) as renewable binder in sustainable geopolymer offers a valuable approach for recycling geopolymer waste. This study investigated the micro-macro characteristics of fly ash (FA)-based geopolymer, including the replacement of FA with GWP up to 100%. The GWP comprised the GWPG from GGBS-based geopolymer paste, the GWPGF from GGBA-FA-based geopolymer paste, and the GWPF from FA-based geopolymer paste, respectively. The findings revealed that GWPG exhibited higher alkaliactivated reactivity compared to GWPGF and GWPF. The geopolymer made with 100% GWPG demonstrated a better microstructure than FA-based geopolymer, but the microstructure of geopolymer deteriorated with the inclusion of GWPGF and GWPF. The average pore diameter of geopolymer made with 100% FA, 100% GWPG, 100% GWPGF, and 100% GWPF was measured at 18.06, 15.69, 116.50, and 92.62 nm, respectively. Mixing GWP led to an increase in drying shrinkage. The strength and permeability resistance of eco-friendly geopolymer initially decreased and subsequently improved with increasing substitution of GWPG, with geopolymer made with 100% GWPG exhibiting superior strength and permeability resistance compared to FA-based geopolymer. However, the strength and permeability resistance of eco-friendly geopolymer exhibited a continuous decline with the increasing replacement of GWPGF or GWPF, up to 100%. When the content of GWP was identical, GWPG blended geopolymer exhibited superior micro-structure and macro-properties compared to GWPGF or GWPF blended geopolymer. Thus, it is recommended to substitute GWPG for 100% FA in fully recycled geopolymer owning good strength and permeability resistance. However, caution should be exercised when incorporating high volumes of GWPGF or GWPF in eco-friendly geopolymer.