Sau D, Shiuly A, Hazra T
Civil Engineering Department, Jadavpur University, Kolkata, 700032 India.
Int J Environ Sci Technol (Tehran). 2023 May 4:1-36. doi: 10.1007/s13762-023-04946-1.
The study presents the mechanical and durability properties of concrete made up of recycled-waste-polyethylene (PE) and waste-polyethylene-terephthalate (PET)-based aggregate as replacement of natural fine and coarse aggregate, respectively. For this purpose, compressive strength, sorptivity, water permeability, aggressive exposure in acid, base, marine and wastewater, impact resistance, abrasion loss including surface and Cantabro, gas permeability, rapid chloride penetration test (RCPT), elevated temperature and leachability test of microplastic were performed. The experimental works were performed for different volumetric replacement (0-40%) of natural fine and coarse aggregates by PE and PET made aggregate respectively for different curing periods. The experimental results revealed that the sorptivity of PE-based concrete was lowest. Water permeability coefficient signified that with the increase of percentage of PET water permeability increased. In case of aggressive exposure test, the percentage of residual mass and residual strength for all replacement was decreased with the increase in exposure period. Further, impact resistance test result signified that energy absorption increased with the increase of PE and PET percentages. Cantabro and surface abrasion weight loss showed similar trend. Carbonation depth was increased with increasing percentages of PE and PET signified strength decreased with increase of percentages of PE and PET when subjected in CO. RCPT test results demonstrated that with increase of PE and PET percentages chloride ion penetrability was reducing. It is observed that below 100 °C temperature, compressive strength of all mix proportions was not affected with elevated temperature. Moreover, the PET-based concrete showed no presence of microplastic in case of leachability test.
该研究展示了分别用回收废聚乙烯（PE）和废聚对苯二甲酸乙二酯（PET）基集料替代天然细集料和粗集料制成的混凝土的力学性能和耐久性。为此，进行了抗压强度、吸水率、透水性、在酸、碱、海水和废水中的侵蚀暴露、抗冲击性、包括表面磨损和坎塔布罗磨损的磨耗损失、透气性、快速氯离子渗透试验（RCPT）、高温以及微塑料的浸出性试验。针对不同的养护期，分别用PE和PET制成的集料对天然细集料和粗集料进行了不同体积替代率（0 - 40%）的试验工作。试验结果表明，PE基混凝土的吸水率最低。透水系数表明，随着PET百分比的增加，透水性增加。在侵蚀暴露试验中，随着暴露时间的增加，所有替代率下的剩余质量和剩余强度百分比均下降。此外，抗冲击性试验结果表明，随着PE和PET百分比的增加，能量吸收增加。坎塔布罗磨损和表面磨耗失重呈现相似趋势。碳化深度随着PE和PET百分比的增加而增加，这表明在二氧化碳环境中，随着PE和PET百分比的增加，强度下降。RCPT试验结果表明，随着PE和PET百分比的增加，氯离子渗透性降低。观察到在100°C以下的温度下，所有配合比的抗压强度不受温度升高的影响。此外，在浸出性试验中，PET基混凝土未检测到微塑料。
