Physical-mechanical potential properties of wastes from glass lapping to produce mortar as partial replacement of the conventional aggregate

Abstract Glass lapping residues (RLV) are fine tailings from the processing of glass for civil construction, commonly non-recyclable. The present study analyzed the use of these residues in Portland cement mortar composition, partially replacing the conventional aggregate, aiming at better compaction. Percentages of residues were adopted at 0% (reference), 5%, 10% and 20% by mass, replacing the fine conventional aggregate (sand). The binder used was Portland cement CP IV-32. The RLV and fine aggregate were submitted to physical tests, through grain size analysis, grain shape and specific mass; RLV and cement, in turn, submitted to chemical analysis by X-ray spectrometry, to identify the compounds. To evaluate the compressive strength and compaction analysis of the composite in the hardened state, cylindrical specimens 50x100 mm were produced. ANOVA (Analisys of Variance) and Coefficient of Variation showed that the RLV added in 5% resulted in lower voids indexes and moisture absorption than the conventional one. The tests also showed best mechanical performance on compression analisys (30,2 MPa) for 5% of residues in the composite, surpassing the conventional one.摘要：玻璃研磨残渣（Glass lapping residues, RLV）是民用建筑用玻璃加工过程中产生的细粒尾矿，通常不具备回收利用价值。本研究探讨了此类残渣在硅酸盐水泥砂浆（Portland cement mortar）配比中的应用可行性，以部分替代传统细骨料，旨在提升复合材料的密实性能。试验按质量百分比分别设置0%（对照组）、5%、10%及20%的残渣掺量，替代传统细骨料（河砂）。所用胶凝材料为CP IV-32型硅酸盐水泥。对玻璃研磨残渣与细骨料开展了物理性能测试，涵盖粒径分析、颗粒形貌检测与密度测定；同时通过X射线光谱法（X-ray spectrometry）对玻璃研磨残渣与水泥进行化学成分分析，以确定其物相组成。为评估硬化后复合材料的抗压强度与密实性能，本研究制备了尺寸为50×100 mm的圆柱形试样。方差分析（Analysis of Variance, ANOVA）与变异系数分析结果显示，掺量为5%的玻璃研磨残渣可使复合材料的孔隙率与吸水率均低于对照组试样。试验结果同时表明，当残渣掺量为5%时，复合材料的抗压性能最优，抗压强度可达30.2 MPa，优于传统对照组试样。