The paper presents studies performed on polymer-cementitious composite made of epoxy resin coating modified with aggregate and cementitious substrate. Epoxy resin is a perfect material that can be used to protect cementitious materials. According to its manufacturer, it can be mixed with fine aggregate. Coarse aggregate made of building demolition wastes is mostly utilized in concrete mixtures or road structures. Fine aggregate is not widely used. Therefore, the novelty of this research was the utilization of recycled fine aggregate (RFA) in epoxy resin coatings. Natural fine aggregate (NFA) was also used as an extender in the coating. The natural aggregate in the coating was partially replaced with recycled aggregate in amounts of 0, 20, 40, 60, 80, and 100% of its weight. Sixteen specimens of polymer-cementitious composites were prepared for the flexural tensile strength test, and thirty-two specimens for the compressive strength test. The macroscale tests were performed after 35 days of curing (28 days – cementitious substrate, and 7 days – epoxy resin). The results show that the epoxy resin coating does not affect the flexural tensile and compressive strength of the analyzed composites. Moreover, the type of aggregate used in the coating does not have a significant impact on the measured properties of polymer-cementitious composites. Economic analysis was performed in order to estimate the cost of the natural and RFAs used in epoxy resin coatings. The calculations show that a higher amount of RFA should be used to increase savings.

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再生细骨料改性环氧树脂复合材料的工程

本文介绍了对由骨料和水泥基体改性的环氧树脂涂料制成的聚合物-水泥基复合材料的研究。环氧树脂是可用于保护水泥材料的理想材料。根据其制造商的说法，它可以与细骨料混合。由建筑拆除废料制成的粗骨料主要用于混凝土混合物或道路结构中。细骨料没有被广泛使用。因此，这项研究的新颖之处在于在环氧树脂涂料中利用了回收的细骨料（RFA）。天然细骨料（NFA）也用作涂料中的增量剂。涂层中的天然骨料被其重量的0％，20％，40％，60％，80％和100％的回收骨料部分替代。制备了十六种聚合物胶结性复合材料的样品进行弯曲抗拉强度测试，并制备了三十二个样品进行抗压强度测试。固化35天（28天–水泥基和7天–环氧树脂）后进行了宏观测试。结果表明，环氧树脂涂层不会影响所分析复合材料的弯曲拉伸和压缩强度。此外，涂料中使用的骨料类型对聚合物水泥复合材料的测量性能没有重大影响。为了估算环氧树脂涂料中使用的天然和RFA的成本，进行了经济分析。计算表明应使用更多的RFA来增加节省。还有32个样品用于抗压强度测试。固化35天（28天–水泥基和7天–环氧树脂）后进行了宏观测试。结果表明，环氧树脂涂层不会影响所分析复合材料的弯曲拉伸和压缩强度。此外，涂料中使用的骨料类型对聚合物水泥复合材料的测量性能没有重大影响。为了估算环氧树脂涂料中使用的天然和RFA的成本，进行了经济分析。计算表明应使用更多的RFA来增加节省。还有32个样品用于抗压强度测试。固化35天（28天–水泥基和7天–环氧树脂）后进行了宏观测试。结果表明，环氧树脂涂层不会影响所分析复合材料的弯曲拉伸和压缩强度。此外，涂料中使用的骨料类型对聚合物水泥复合材料的测量性能没有重大影响。为了估算环氧树脂涂料中使用的天然和RFA的成本，进行了经济分析。计算结果表明，应使用更多的RFA来增加节省。结果表明，环氧树脂涂层不会影响所分析复合材料的弯曲拉伸和压缩强度。此外，涂料中使用的骨料类型对聚合物水泥复合材料的测量性能没有重大影响。为了估算环氧树脂涂料中使用的天然和RFA的成本，进行了经济分析。计算表明应使用更多的RFA来增加节省。结果表明，环氧树脂涂层不会影响所分析复合材料的弯曲拉伸和压缩强度。此外，涂料中使用的骨料类型对聚合物水泥复合材料的测量性能没有重大影响。为了估算环氧树脂涂料中使用的天然和RFA的成本，进行了经济分析。计算表明应使用更多的RFA来增加节省。