School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore; Residues and Resource Reclamation Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore, 637141, Singapore.
Residues and Resource Reclamation Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore, 637141, Singapore.
Chemosphere. 2024 Nov;367:143567. doi: 10.1016/j.chemosphere.2024.143567. Epub 2024 Oct 18.
Plastic disposal has become a challenge due to its challenging degradability, and plastics recycling is one of the ideal methods. The utilization of recycled plastic in building materials has been widely researched as a possible way to store plastics permanently. An investigation on the modification and incorporation of polyethylene terephthalates (PET) on fresh and hardened properties of mortar composites (MCs) is performed in the study. The work provides understanding of the synergistic effects of plastic modification methods with different types of PET additives on MC properties and to explain behavior of modified PET in mortar composites. Modification methods include microwave radiation, chemicals oxidation and alkaline hydrolysis. These methods are applied on three types of structural PET materials (hard particles, hard strips and soft yarns). The properties of 0.5%-3% PET added MCs include workability, compressive strength (CS), flexural strength (FS) and toughness are determined. At 28 days, 3% hydrolysis-treated PET yarns significantly increased FS by 69.6% and improved toughness by almost 15 times while CS with 3% PET particles modified by microwave radiation and chemicals oxidation were comparable to the control.
由于塑料的降解性具有挑战性，因此塑料处理已成为一个挑战，而塑料回收是一种理想的方法。将回收塑料用于建筑材料已被广泛研究，作为永久储存塑料的一种可能方法。本研究对在水泥砂浆（MC）的新鲜和硬化性能上进行的聚对苯二甲酸乙二醇酯（PET）的改性和掺入进行了调查。该工作提供了对不同类型 PET 添加剂的塑料改性方法与 MC 性能的协同效应的理解，并解释了改性 PET 在水泥砂浆复合材料中的行为。改性方法包括微波辐射、化学氧化和碱性水解。这些方法应用于三种类型的结构 PET 材料（硬颗粒、硬条和软纱线）。测定了添加 0.5%-3% PET 的 MC 的工作性能、抗压强度（CS）、抗弯强度（FS）和韧性。在 28 天时，3%水解处理的 PET 纱线使 FS 显著提高了 69.6%，韧性提高了近 15 倍，而微波辐射和化学氧化改性的 3% PET 颗粒的 CS 与对照相当。
