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Effective Utilization of Waste Glass as Cementitious Powder and Construction Sand in Mortar

by 1,2, 1,2, 1,* and 3
1
Centre for Durability & Sustainability Studies of Shandong Province, Qingdao University of Technology, Qingdao 266033, China
2
Centre for Future Materials, University of Southern Queensland, Toowoomba QLD 4350, Australia
3
Guangzhou University-Tamkang University Joint Research Center for Engineering Structure Disaster Prevention and Control, Guangzhou University, Guangzhou 510006, China
*
Author to whom correspondence should be addressed.
Materials 2020, 13(3), 707; https://doi.org/10.3390/ma13030707
Received: 30 December 2019 / Revised: 23 January 2020 / Accepted: 3 February 2020 / Published: 5 February 2020
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. View Full-Text
Keywords: waste glass powder; waste glass sand; alkali–silica reaction; active SiO2 waste glass powder; waste glass sand; alkali–silica reaction; active SiO2
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MDPI and ACS Style

Wang, Y.; Cao, Y.; Zhang, P.; Ma, Y. Effective Utilization of Waste Glass as Cementitious Powder and Construction Sand in Mortar. Materials 2020, 13, 707. https://doi.org/10.3390/ma13030707

AMA Style

Wang Y, Cao Y, Zhang P, Ma Y. Effective Utilization of Waste Glass as Cementitious Powder and Construction Sand in Mortar. Materials. 2020; 13(3):707. https://doi.org/10.3390/ma13030707

Chicago/Turabian Style

Wang, Yanru, Yubin Cao, Peng Zhang, and Yuwei Ma. 2020. "Effective Utilization of Waste Glass as Cementitious Powder and Construction Sand in Mortar" Materials 13, no. 3: 707. https://doi.org/10.3390/ma13030707

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