Values of slip resistance of samples.

The exponential growth of plastic production has led to a dramatic increase in plastic waste, creating significant environmental and public health challenges. Among the available disposal methods, recycling is widely regarded as the most environmentally and economically advantageous. The development of effective strategies for recycling plastic waste is therefore a critical area of research, particularly in the construction industry. Incorporating plastic waste into concrete not only minimizes landfill disposal, but also has the potential to improve the performance of the material. This study investigates the effect of recycled polymer shot, incorporated at levels of 5% and 10% by cement mass, on the physical, mechanical, and microstructural properties of concrete. Comprehensive tests were performed, including measurements of density, thermal conductivity, slump, slip resistance, compressive, flexural, and tensile strength, as well as elastic modulus. The results demonstrate that the use of polymer shot significantly improves key properties of concrete, with increases of up to 45% in flexural strength and 62% in tensile strength at the higher addition level. Image-based microstructural analysis further revealed modifications in porosity and fracture surface complexity, supporting the observed performance enhancements. Overall, the incorporation of recycled polymer shot in concrete provides a promising approach for valorizing plastic waste, improving concrete performance, and supporting sustainable construction and resource management strategies.塑料生产的指数级扩张导致塑料废弃物总量大幅攀升，给生态环境与公众健康带来了严峻挑战。在现有塑料废弃物处置手段中，回收利用被普遍认为是兼具环境效益与经济效益的最优方案。因此，开发高效的塑料废弃物回收利用策略已成为关键研究方向，在建筑业中这一需求尤为突出。将塑料废弃物掺入混凝土中，不仅可减少填埋处置量，还有望改善该建材的性能表现。本研究探讨了以水泥质量5%和10%的掺量掺入再生聚合物粒料（recycled polymer shot）对混凝土物理、力学及微观结构性能的影响。研究开展了全面的性能测试，涵盖密度、导热系数、坍落度（slump）、抗滑性、抗压强度、抗弯强度（flexural strength）、抗拉强度以及弹性模量的测定。结果表明，掺入聚合物粒料可显著改善混凝土的关键性能：在较高掺量（10%）下，抗弯强度最高提升45%，抗拉强度最高提升62%。基于图像的微观结构分析进一步揭示了孔隙率与断裂面复杂度的变化，佐证了所观测到的性能提升效果。总体而言，在混凝土中掺入再生聚合物粒料，为塑料废弃物资源化利用、改善混凝土性能以及支撑可持续建筑与资源管理策略提供了一条极具前景的可行路径。