Abstract Conventional plain concrete (PC) leads to large design thickness when used in applications where high flexural strength is required. Therefore, to minimize the consumption of natural resources and to avoid large design thickness, it is fundamental to upgrade the flexural strength of PC by using supplementary materials i.e. steel rebars, fibers. This study evaluated the environmental and economic performance of the pavements designed with different fibrous concrete composites (FCCs). FCCs were manufactured by incorporating 0.5 and 1.0% volume fractions of glass fiber (GF), hooked steel fiber (HSF), and polypropylene fiber (PPF) in the normal strength concrete (C30). Initially, the flexural properties of FCCs were evaluated and then these properties were utilized to design the thickness of jointed plain concrete pavement (JPCP). Using the cost and carbon emissions per cubic meter of each concrete mix, the environmental and economic performance of JPCP construction was estimated. The performance of different FCCs in the JPCP was compared with that of the conventional PC. The results of mechanical testing showed that HSF-FCC outperforms both PPF-FCC and GF-FCC by a significant margin. Despite inferior mechanical performance compared to HSF-FCC, both PPF-FCC and GF-FCC are very effective in reducing the carbon footprint and cost of JPCP. JPCPs with GF-FCC and PPF-FCC are also ecofriendly and economical than the JPCP with conventional PC for the same load-carrying capacity. Overall, FCC can yield cheaper and eco-friendlier pavements compared to conventional PC if the dosage and type of fiber are correctly chosen as recommended in this study.

中文翻译：

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钢、玻璃和聚丙烯纤维增强水泥复合材料在接缝素混凝土路面中应用的环境和经济效益

摘要 传统素混凝土 (PC) 用于需要高抗弯强度的应用时会导致设计厚度较大。因此，为了尽量减少自然资源的消耗，避免设计厚度过大，利用钢筋、纤维等辅助材料提高PC的抗弯强度是根本。本研究评估了采用不同纤维混凝土复合材料 (FCC) 设计的路面的环境和经济性能。FCC 是通过在普通强度混凝土 (C30) 中加入体积分数为 0.5% 和 1.0% 的玻璃纤维 (GF)、钩状钢纤维 (HSF) 和聚丙烯纤维 (PPF) 来制造的。最初，评估了 FCC 的弯曲性能，然后利用这些性能来设计连接素混凝土路面 (JPCP) 的厚度。使用每种混凝土混合物的每立方米成本和碳排放量，估计 JPCP 施工的环境和经济性能。JPCP 中不同 FCC 的性能与传统 PC 的性能进行了比较。力学测试结果表明，HSF-FCC 的性能明显优于 PPF-FCC 和 GF-FCC。尽管与 HSF-FCC 相比机械性能较差，但 PPF-FCC 和 GF-FCC 在减少 JPCP 的碳足迹和成本方面都非常有效。在承载能力相同的情况下，采用 GF-FCC 和 PPF-FCC 的 JPCP 也比采用传统 PC 的 JPCP 环保且经济。总的来说，如果按照本研究的建议正确选择纤维的用量和类型，与传统 PC 相比，FCC 可以生产出更便宜、更环保的路面。