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首页> 外文期刊>Journal of materials in civil engineering >Reclaimed Asphalt Pavement as a Substitution to Natural Coarse Aggregate for the Production of Sustainable Pervious Concrete Pavement Mixes
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Reclaimed Asphalt Pavement as a Substitution to Natural Coarse Aggregate for the Production of Sustainable Pervious Concrete Pavement Mixes

机译：再生沥青路面作为自然粗骨料的替代品，用于生产可持续的透水混凝土路面混合

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摘要

This study discusses the effect of utilizing coarse reclaimed asphalt pavement (RAP) aggregates as a replacement to natural coarse aggregates (NCAs) for the production of pervious concrete pavement (PCP) mixes. Coarse RAP (RC) aggregates were utilized in proportions of 0%, 25%, 50%, 75%, and 100%, respectively. It was observed that the porosity and permeability coefficient of the PCP mixes increases considerably as the RAP replacement level increases. Meanwhile, the incorporation of RC was also found to negatively affect the mechanical properties of the PCP mixes. However, the compressive and flexural strength values were noted to be well within the prescribed limits (5-25 MPa and 1-3.2 MPa) required for a PCP mixture. On the other hand, the incorporation of RC was observed to reduce the hardened density, resistance to abrasion, and resistance against aggressive environment of chlorides and sulfates. Therefore, in order to prepare a PCP mixture such that there exists a fine balance in various properties, it is recommended that RC up to 50% may be utilized as a replacement to NCA. In view of achieving maximum sustainability, RC up to 100% may be completely utilized for the production of PCP mixes provided a binary gradation is adopted. Utilization of RAP in preparation of pervious concrete pavement mix will not only resolve the issues related to clearance of an enormous amount of RAP dumps, but would go a long way in dealing with various other environmental and ecological impacts.
机译：本研究讨论了利用粗再生沥青路面（RAP）骨料作为对天然粗骨料（NCAS）的替代品的效果，用于生产渗透混凝土路面（PCP）混合物。粗RAP（RC）聚集体分别以0％，25％，50％，75％和100％的比例使用。观察到，随着说唱替代水平的增加，PCP混合物的孔隙率和渗透系数随着时间的增加而增加。同时，还发现RC的掺入对PCP混合物的力学性能产生负面影响。然而，注意到PCP混合物所需的规定限制（5-25MPa和1-3.2MPa）内的压缩和弯曲强度值。另一方面，观察到RC的掺入以降低硬化密度，耐磨损和抗氯化物和硫酸盐的侵蚀环境的抗性。因此，为了制备PCP混合物，使得在各种性质中存在细平衡，建议高达50％的RC可以用作NCA的替代品。考虑到实现最大可持续性，可以完全利用高达100％的RC用于生产PCP混合物，所以采用二元灰度。利用说唱在制备透水混凝土路面混合中的利用率不仅可以解决与巨额垃圾垃圾的许可证相关的问题，而且在处理各种其他环境和生态影响方面会走很长的路要走。

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