Abdelsattar Doha E, El-Demerdash Safinaz H, Zaki Elsayed G, Dhmees Abdelghaffar S, Azab Mostafa A, Elsaeed Shimaa M, Kandil Usama F, Naguib Hamdy M
Chemistry Department, Faculty of Science, Menoufia University, Shebin El-Kom 32512, Egypt.
Department of Petroleum Applications, Egyptian Petroleum Research Institute (EPRI), Nasr City, 11727Cairo, Egypt.
ACS Omega. 2023 Oct 9;8(42):39730-39738. doi: 10.1021/acsomega.3c05739. eCollection 2023 Oct 24.
The hazards of polymer waste and emitted gas on the environment pose a global challenge. As a trial to control this, the current work aims to reuse the polymer waste mix (PM) as fillers in calcium silicate to prepare new composites of environmentally friendly polymer concrete. PM was first subjected to treatment to obtain treated PM (TPM) and then was filled in new dicalcium silicate cement with different concentrations. The microstructural characterizations declare the successful preparation of the dicalcium silicate base material. After the curing reaction, the precipitated carbonate main product is responsible for the gained properties. The CO uptake% in the proposed composites reached 16.6%, referring to the successful storage of CO gas during curing. The treatment reaction led to an increase in the flexural and compression strengths due to the strengthening of the polymer waste mix-cement interface; the strengths were increased gradually with more contents of TPM fillers. 7% TPM-cement concentration achieved the highest flexural strength and compression strength of10.2 and 12.7%, respectively, compared with blank cement. The used polymer improved slightly the pull-off force of the prepared cement, and 7 and 5% TPM-cement composites have the maximum values. All the proposed composites passed the impact testing without failure, where the combination between the polymer waste and silicate cement resulted in a stable composite surface. Compared with the blank, the different concentrations of TPM-cement composites show more stability against water absorption. In addition, the proposed composites and blank cement have a very low carbon dioxide emission. The ability to recycle the polymer waste, form new type of low-energy silicate, improve the mechanical and surface properties, uptake CO gas, and reduce gas emission makes the proposed polymer waste mix-cement composites as environmentally friendly construction products.
聚合物废料和排放气体对环境造成的危害构成了一项全球性挑战。作为应对这一挑战的尝试，当前工作旨在将聚合物废料混合物（PM）作为填料用于硅酸钙中，以制备环保型聚合物混凝土的新型复合材料。首先对PM进行处理以获得处理后的PM（TPM），然后将其填充到不同浓度的新型硅酸二钙水泥中。微观结构表征表明成功制备了硅酸二钙基材料。固化反应后，沉淀的碳酸盐主要产物决定了所获得的性能。所提出的复合材料中的CO吸收百分比达到16.6%，这表明在固化过程中成功存储了CO气体。处理反应由于聚合物废料混合物与水泥界面的强化而导致抗弯强度和抗压强度增加；随着TPM填料含量的增加，强度逐渐提高。与空白水泥相比，7%TPM-水泥浓度分别实现了最高抗弯强度和抗压强度，分别为10.2%和12.7%。所使用的聚合物略微提高了所制备水泥的拉拔力，7%和5%TPM-水泥复合材料具有最大值。所有提出的复合材料均通过了冲击测试且未失效，其中聚合物废料与硅酸盐水泥的结合产生了稳定的复合材料表面。与空白相比，不同浓度的TPM-水泥复合材料在吸水性方面表现出更高的稳定性。此外，所提出的复合材料和空白水泥的二氧化碳排放量都非常低。聚合物废料的回收利用能力、形成新型低能耗硅酸盐、改善机械性能和表面性能、吸收CO气体以及减少气体排放，使得所提出的聚合物废料混合物-水泥复合材料成为环保型建筑产品。
