Effective Utilization of Waste Glass as Cementitious Powder and Construction Sand in Mortar
Article
Article Title | Effective Utilization of Waste Glass as Cementitious Powder and Construction Sand in Mortar |
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ERA Journal ID | 123663 |
Article Category | Article |
Authors | Wang, Yanru (Author), Cao, Yubin (Author), Zhang, Peng (Author) and Ma, Yuwei (Author) |
Journal Title | Materials |
Journal Citation | 13 (3), pp. 1-21 |
Article Number | 707 |
Number of Pages | 22 |
Year | 2020 |
Publisher | MDPI AG |
Place of Publication | Switzerland |
ISSN | 1996-1944 |
Digital Object Identifier (DOI) | https://doi.org/10.3390/ma13030707 |
Web Address (URL) | https://www.mdpi.com/1996-1944/13/3/707 |
Abstract | The purpose of this study is to investigate the availability of waste glass as alternative materials in sustainable constructions. Collected waste glass was ground into waste glass powder (WGP) with similar particle size distribution as Portland cement (PC) and waste glass sand (WGS) with similar grade as sand. The compressive strength was investigated through the Taguchi test to evaluate the effect of different parameters on WGP-blended mortar, which include WG-replacement rate (G/B, 0, 10%, 20%, 30%), water/binder ratio (w/b, 0.35. 0.40, 0.50, 0.60), cementitious material dosage (Cpaste, 420, 450, 480, 500 kg/m3), and color of powder (green (G) and colorless (C)). The alkali–silica reaction (ASR) expansion risk of WGS-blended mortar was assessed. The experimental results indicated that WGP after 0.5 h grinding could be used as substituted cement in mortar and help to release potential ASR expansion. The replacement rate played a dominant role on strength at both the early or long-term age. The water/binder ratio of 0.35 was beneficial to the compressive strength at three days and 0.50 was better for strength at 60 and 90 days. An optimal value of cementitious material dosage (450 Kg/m3) exited in view of its strength, while the effect of the color of WG was minor. WGS could be graded as standard construction sand and no ASR expansion risk was found even for 100% replacement of regular sand in mortar. Through the comprehensive reuse of waste glass, this study could provide basic knowledge and a concept for the sustainable development of building materials. |
Keywords | waste glass powder; waste glass sand; alkali–silica reaction; active SiO2 |
ANZSRC Field of Research 2020 | 400505. Construction materials |
Byline Affiliations | Centre for Future Materials |
Qingdao University of Science and Technology, China | |
Guangzhou University, China | |
Open access url | https://www.mdpi.com/1996-1944/13/3/707 |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5936/effective-utilization-of-waste-glass-as-cementitious-powder-and-construction-sand-in-mortar
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