Waste Glass in Cement and Geopolymer Concretes: A Review on Durability and Challenges

Polymers

Wahid Ferdous¹  Rayed Alyousef²  Md. Abdullah Al Mamun³  Ailar Hajimohammadi⁴  Ayesha Siddika⁴ 

[1] Centre for Future Materials, University of Southern Queensland, Toowoomba, QLD 4350, Australia;Department of Civil Engineering, College of Engineering, Prince Sattam Bin Abdulaziz University, Alkharj 11942, Saudi Arabia;Department of Civil Engineering, Rajshahi University of Engineering & Technology, Rajshahi 6204, Bangladesh;School of Civil and Environmental Engineering, University of New South Wales (UNSW Sydney), Sydney, NSW 2052, Australia;

关键词: waste glass;    alkali-activated cement;    aggregate;    activator;    durability;    challenges;   

DOI  :  10.3390/polym13132071

来源: DOAJ

【 摘 要 】

Every year, the world is producing around 100 metric tons of waste glass (WG), the majority of them are going to landfills that create massive environmental problems. One approach to solve this problem is to transform waste glass into construction materials. Glass is recyclable; however, the melting temperature of the glass is highly dependent on its colour that requires sorting before recycling. To overcome this challenge, many researchers and end-users are using broken glass in concrete either as a binder or aggregates. While significant investigations have done in this area, however, the outcomes of these studies are scattered, and difficult to reach a firm conclusion about the effectiveness of WG in concrete. In this study, the roles of WG and its impact on microstructural and durability properties for both cement and geopolymer concrete are critically reviewed. This review reveals that the amorphous silica in WG effectively participate to the hydration and geopolymerization process and improve concrete microstructural properties. This behaviour of WG help to produce durable concrete against shrinkage, chemical attack, freeze-thaw action, electrical and thermal insulation properties. The optimum replacement volume of binders or natural aggregates and particle size of WG need to be selected carefully to minimise the possible alkali-silica reaction. This review discusses a wide range of parameters for durability properties and challenges associated with WG concrete, which provides necessary guidelines for best practice with future research directions.

【 授权许可】

Unknown