Effect of glass aggregates and coupling agent on the mechanical behaviour of polymeric glass composite

JOURNAL OF CLEANER PRODUCTION

卷:227

Article

Heriyanto¹  Pahlevani, Farshid¹  Sahajwalla, Veena¹ 

[1] UNSW SYDNEY, Sch Mat Sci & Engn, Ctr Sustainable Mat Res & Technol SMaRT, Sydney, NSW 2052, Australia

关键词: Waste glass;    Polymeric glass composite;    Waste minimization;    Silane coupling agent;    Green materials;   

DOI  :  10.1016/j.jclepro.2019.04.152

来源: Elsevier

【 摘 要 】

This study is the second in a series of papers on synthesizing polymeric glass composite (PGC) panels (Heriyanto, 2018) from mixed, contaminated and broken glasses that are not being recycled at present. The first series of the paper covered the composite production from powder glass, resin and coupling agent as well as investigated the mechanical properties of the powder-resin composite. In Part II, the study aims to incorporate glass aggregates as structural filler and decorative element. The lower surface area of glass aggregates compared to glass powder filler maximizes the waste glass input from 80 to 85 -90% and minimize the resin used by 5-10%. Following similar process in previous study, the panel in this study was made by mixing waste glass filler and resin to a dough-like consistency, followed by hot pressing the mixture at 550 Bar at 70 degrees C. The ratio of glass powder (GP), glass aggregates and resin are 50 -55/35/15-10 respectively. The amount of glass aggregate was kept constant at 35% relative to the total weight, replicating a gap graded composite system in concrete where the intermediate size of aggregate is missing. Three different sizes of glass aggregates were used, ranging from 1 to 2, 2-4 and 4-6 mm, and their effect on the mechanical properties were reported in this study. The strength of the composites was inversely linear with the glass aggregate size. Small aggregate panels have higher strength compared to that with larger aggregates. Particle-resin interaction, continual interfacial region, and aggregate size were found to determine the average strength of the final composite panels. Effect of silane coupling agent (CA) was also reported. The CA helps to modify the glass surface and improve its wettability with the resin binder. The flexural and compression strength, as well as the water-resistant behaviour, were found to improve nearly double with 2% of CA addition. By using scanning electron microscope (SEM), rough surface and cracks was observed to occur at the fracture surface of the untreated panel, while massive shear deformation were found when silane were added. Except for fire-retardancy, most of the physical and mechanical performances of the silane-treated panels were found to offer equal or if not, superior performance compared to that of natural stones. These new approaches of using waste glass in resin-based composites can be a new alternative to produce green materials that deliver economic and environmental benefits. (C) 2019 Elsevier Ltd. All rights reserved.

【 授权许可】

Free