de Souza Marcos Ferreira, Simões Karoline Carvalho Dornelas, do Amaral Adriana Garcia, Schneider Roselene Maria
Environmental Science Post Graduation Program. Human, Naturals and Social Institute, Federal University of Mato Grosso, Sinop, Brazil.
Institute of Agricultural and Environmental Sciences, Federal University of Mato Grosso, Sinop, Brazil.
Environ Sci Pollut Res Int. 2025 Jul;32(31):18694-18708. doi: 10.1007/s11356-025-36759-9. Epub 2025 Jul 29.
Glass waste is generated in large quantities worldwide, yet only a small portion is recycled or reused. To support the circular economy, it is essential to explore alternatives that incorporate this waste into new production chains, such as in civil construction. This study investigates the technical feasibility of replacing sand with glass powder in the production of dry concrete blocks. Four mixtures were tested, with sand replaced by 0%, 25%, 50%, and 75% glass powder (particle size < 600 μm). The obtained blocks were characterized by water absorption and compressive strength. All mixtures met the standard requirement for water absorption (< 10%), with values ranging from 6.0 to 7.5%. In terms of compressive strength, the replacement of sand with glass powder led to a statistically significant improvement (p ≤ 0.05) in all substitution levels. The average compressive strength increased by 32 to 35% compared to the control mix (3.11 MPa at 28 days), with the highest value reaching 4.35 MPa at 56 days for the 50% replacement. Furthermore, only the 50% mix achieved the minimum characteristic compressive strength required by Brazilian standards (fbk ≥ 3 MPa), with 3.62 MPa. The results support the industrial use of glass powder as a sustainable alternative to natural sand, promoting the reuse of long-neck glass bottles and reducing environmental impact.
全球产生大量玻璃废料，但只有一小部分被回收或再利用。为了支持循环经济，探索将这种废料纳入新生产链的替代方案至关重要，比如在民用建筑领域。本研究调查了在干混凝土砌块生产中用玻璃粉替代沙子的技术可行性。测试了四种混合物，沙子分别被0%、25%、50%和75%的玻璃粉（粒径<600μm）替代。对所得砌块进行了吸水率和抗压强度表征。所有混合物的吸水率均符合标准要求（<10%），数值在6.0%至7.5%之间。在抗压强度方面，用玻璃粉替代沙子在所有替代水平下均导致了统计学上的显著提高（p≤0.05）。与对照混合物（28天时为3.11MPa）相比，平均抗压强度提高了32%至35%，50%替代率的混合物在56天时抗压强度最高达到4.35MPa。此外，只有50%的混合物达到了巴西标准要求的最低特征抗压强度（fbk≥3MPa），为3.62MPa。研究结果支持将玻璃粉作为天然沙子的可持续替代品进行工业应用，促进长颈玻璃瓶的再利用并减少环境影响。
