Nanoparticles are used in innovative mortars in order to improve their engineering properties. In this paper, recycled PET (polyethylene terephthalate) nanoparticles were used as a substitute for sand in mortars. PET aggregates were obtained cutting water bottles wastes into many small sized pieces and the plastic fibres were treated through chemical depolymerization process. Mortars with different percentages of PET were tested to determine their physical and mechanical (flexural and compressive strength) properties. Specific attention is given to the heat-transfer capacity of the cement pastes investigated. The results of the mechanical tests showed a reduction of the flexural and compressive strength values when the amount of PET nanoparticles increase. The thermal conductivity tests showed that chemically depolymerized PET nanoparticles derived from plastic wastes reduced the heat conduction capacity of the mortar. Therefore, the innovative mortars here tested can be considered for thermal insulation applications in the construction field with the advantage of recycling waste PET.

中文翻译：

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新的砂浆与化学解聚的废PET骨料混合

纳米颗粒用于创新的砂浆中，以改善其工程性能。在本文中，再生的PET（聚对苯二甲酸乙二醇酯）纳米粒子被用作砂浆中沙子的替代品。通过将水瓶废料切成许多小块而获得PET聚集体，并通过化学解聚工艺处理塑料纤维。测试了具有不同百分比的PET的砂浆，以确定其物理和机械（抗弯强度和抗压强度）性能。应特别注意所研究的水泥浆的传热能力。力学测试的结果表明，当PET纳米颗粒的数量增加时，抗弯强度和抗压强度值会降低。导热性测试表明，源自塑料废料的化学解聚PET纳米颗粒降低了砂浆的导热能力。因此，可以利用这里回收利用的废弃PET的优势，将经过测试的创新砂浆考虑用于建筑领域的隔热应用。