A study on the use of waste glass in preparing alkali-activated repairing material

被引:5
作者
Ali, Hafiz Asad [1 ]
Keke, Sun [1 ]
Alrefaei, Yazan [1 ]
Poon, Chi Sun [1 ]
机构
[1] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
关键词
Waste glass; Alkali-activated materials; Shrinkage; Bond strengths; Interfacial transition zone (ITZ); Repairing material; BLAST-FURNACE SLAG; BOND STRENGTH; PORTLAND-CEMENT; AUTOGENOUS SHRINKAGE; GEOPOLYMER MORTARS; CONCRETE; POWDER;
D O I
10.1016/j.conbuildmat.2024.136803
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Excessive autogenous shrinkage and poor bond performance associated with GGBS-based alkali-activated repairing materials are limiting factors affecting their wide applications. To address these issues, this study focuses on the use of waste glass powder (WGP) as a precursor and glass cullet (GC) as a fine aggregate in preparing alkali-activated repairing mortars (AARMs). The bond strengths and autogenous shrinkages were assessed. Results found that the optimal content of WGP in preparing AARMs was 50% for obtaining a bond strength of 1.70 MPa and shrinkage of about 3500 mu strains. In addition, it was observed that incorporating 50% WGP in combination with GC further decreased the shrinkage compared to the mixture prepared with river sand. Furthermore, the inclusion of 10 wt% MK decreased the flowability and strengths. However, it significantly reduced the autogenous shrinkage (1900 mu strains), producing a compact and intact interfacial bonding zone due to the absence of micro cracking and the presence of N-A-S-H alongside C-A-S-H gels.
引用
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页数:12
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