Wang Yanru, Cao Yubin, Zhang Peng, Ma And Yuwei
Centre for Durability & Sustainability Studies of Shandong Province, Qingdao University of Technology, Qingdao 266033, China.
Centre for Future Materials, University of Southern Queensland, Toowoomba QLD 4350, Australia.
Materials (Basel). 2020 Feb 5;13(3):707. doi: 10.3390/ma13030707.
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 (, 420, 450, 480, 500 kg/m), 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/m) 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.
本研究的目的是调查废玻璃作为可持续建筑中替代材料的可用性。将收集到的废玻璃研磨成粒径分布与波特兰水泥（PC）相似的废玻璃粉（WGP），以及级配与沙子相似的废玻璃砂（WGS）。通过田口试验研究抗压强度，以评估不同参数对掺WGP砂浆的影响，这些参数包括废玻璃替代率（G/B，0、10%、20%、30%）、水胶比（w/b，0.35、0.40、0.50、0.60）、胶凝材料用量（，420、450、480、500 kg/m）以及粉末颜色（绿色（G）和无色（C））。评估了掺WGS砂浆的碱-硅酸反应（ASR）膨胀风险。实验结果表明，研磨0.5小时后的WGP可作为砂浆中的替代水泥，并有助于释放潜在的ASR膨胀。替代率在早期和长期龄期对强度都起主导作用。水胶比为0.35有利于三天龄期的抗压强度，而水胶比为0.50对60天和90天龄期的强度更有利。考虑到强度，胶凝材料用量存在一个最佳值（450 Kg/m）,而废玻璃颜色的影响较小。WGS可分级为标准建筑砂，即使在砂浆中100%替代普通砂也未发现ASR膨胀风险。通过对废玻璃的综合再利用，本研究可为建筑材料的可持续发展提供基础知识和理念。
