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首页> 外文期刊>Journal of materials in civil engineering >Performance Evaluation of Recycled-Concrete Aggregates and Reclaimed-Asphalt Pavements for Foam-Mix Asphalt Mixes
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Performance Evaluation of Recycled-Concrete Aggregates and Reclaimed-Asphalt Pavements for Foam-Mix Asphalt Mixes

机译：用于泡沫混合沥青混合物的再生混凝土聚集和再生沥青路面的性能评价

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摘要

Mechanical foaming of bitumen is a popular technique employed to reduce the viscosity of binder for ensuring coating of aggregates at lower temperature. The potential of this technique is being utilized widely for producing sustainable reclaimed-asphalt pavement (RAP) inclusive mixtures, but usage of recycled concrete-aggregates (RCA) in foamed technology is very scanty. The present study is the first of its kind attempting to investigate the optimum proportion of hydrophobic RAP aggregates and hydrophilic RCA (separately as well as combined) for the preparations of foam-mix asphalt (FMA). It was observed that incorporation of RCA in FMA affects the quality of mixes but RCA inclusive FMA was found to qualify the stipulated specifications for pavement applications. From the present study, it is found that up to 20% RCA and 40% RAP proportions individually could be utilized for the preparation of foam mixes. Also, it is interesting to note that delayed hydration of residual cement grains could enhance the performance of FMA. Furthermore, 30% RCA coupling with 10% RAP was found to exhibit acceptable performance. The present study suggests that 0.1% fiber reinforcement could enhance the performance of the foam mixes considerably.
机译：沥青的机械发泡是一种用于降低粘合剂粘度的流体技术，以确保在较低温度下涂覆聚集体。这种技术的潜力被广泛用于生产可持续的再生 - 沥青路面（RAP）包容性混合物，但泡沫技术中再生混凝土聚集体（RCA）的使用非常稀少。本研究首先试图研究疏水式RAP聚集体和亲水性RCA（单独和组合）的最佳比例，用于泡沫混合物沥青（FMA）的制备。观察到，在FMA中掺入RCA会影响混合物的质量，但发现RCA包容性FMA有资格符合路面应用规定的规格。从本研究中，发现高达20％的RCA和40％的RAP比例可用于制备泡沫混合物。此外，有趣的是注意，残留水泥晶粒的延迟水合可以提高FMA的性能。此外，发现与10％RAP的30％RCA偶联表现出可接受的性能。本研究表明，0.1％的纤维增强可以提高泡沫混合的性能大大。

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