Milled Waste Glass Powder in Magnesium-Silicate-Hydrate Cement: Technical and Environmental Assessment

被引：5
作者：
Liang, Shuang [1 ]
Zhou, Xiangming [1 ]
Ruan, Shaoqin [2 ]
Kastiukas, Gediminas [3 ]
Sun, Yuzhou [4 ]
机构：
[1] Brunel Univ London, Dept Civil & Environm Engn, Uxbridge UB8 3PH, Middlesex, England
[2] Zhejiang Univ, Coll Civil Engn & Architecture, Hangzhou 310058, Peoples R China
[3] Shenzhen Univ, Guangdong Prov Key Lab Durabil Marine Civil Engn, Shenzhen 518060, Peoples R China
[4] Zhongyuan Univ Technol, Sch Civil Engn & Architecture, Zhengzhou 450007, Peoples R China
来源：
JOURNAL OF MATERIALS IN CIVIL ENGINEERING | 2023年 / 35卷 / 01期
基金：
欧盟地平线“2020”;
关键词：
MgO; Waste glass (WG); Microsilica; Magnesium-silicate-hydrate (M-S-H); Hydration; Environmental impact; LIFE-CYCLE ASSESSMENT; S-H CEMENT; REACTIVE MGO; PERFORMANCE; DESIGN;
D O I：
10.1061/(ASCE)MT.1943-5533.0004551
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This study investigated replacing microsilica with waste glass for preparing MgO-SiO2 formulations to form magnesium-silicate-hydrate (M-S-H). The mechanical performance and microstructural development of the samples were supported by an assessment of their environmental impact. The obtained results indicated that microsilica can be partially replaced by waste glass (i.e., 50% by weight replacement) in MgO-SiO2 formulations without sacrificing the compressive strength of samples, whereas the complete replacement with waste glass did not reveal favorable outcomes in terms of performance. The reactivity and solubility of the silica source played a key role in the formation of M-S-H, which contributed to the strength development in samples containing microsilica. Alternatively, samples containing waste glass as their only silica source revealed limited M-S-H formation and brucite, accounting for their poor mechanical performance. The predetermined treatment of waste glass should be carefully chosen, which could also affect the outcomes of the life cycle assessment (LCA). (C) 2022 American Society of Civil Engineers.
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页数：12
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