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首页> 外文期刊>Journal of Civil, Construction and Environmental Engineering >Evaluation of Marshall Compactor Effect on the Degradation of Recycled Concrete Aggregate
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Evaluation of Marshall Compactor Effect on the Degradation of Recycled Concrete Aggregate

机译：马歇尔压实机对再生混凝土骨料降解影响的评价

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Demolishing structures presents the problem of disposing of crushed cement and concrete. This form of pollution is a cause for anxiety for environmental awareness agencies, inspiring the creation of more construction and structural policies and regulations that aim to address handling and disposing of crushed concrete. In place of throwing away crushed concrete, it ought to be reused. This study explores the feasibility of reusing crushed concrete in pavement construction applications, by adding it as substitute for aggregate in asphalt mixtures. The study focuses on the physical properties of crushed concrete and its degradation after the compaction of aggregates; in particular, it takes into account its absorption and abrasion qualities. The generally accepted advice is to mix crushed concrete with naturally sourced conventional aggregates. This study evaluated the suitability of variously proportioned and graded mixtures of conventional aggregates and Recycled Concrete Aggregate (RCA); six different proportions (0%, 20%, 40%, 60%, 80% and 100%) and five grades of crushed cement concrete were assessed using a 5 mm aggregate passing sieve and a 1.18 mm retaining sieve. The resulting mixtures were subjected to compaction of 20, 40, 60, 80 or 100 blows, using a Marshall Compactor. The results of the study reveal that the crushed concrete and the mixtures with the recommended ranges of sieve sizes and conventional aggregates are suitable for roads that have a medium volume of traffic.
机译：拆除建筑物提出了处置粉碎的水泥和混凝土的问题。这种污染形式使环保意识的机构感到不安，促使人们制定更多的建筑和结构性政策法规，以解决破碎混凝土的处理和处置问题。代替扔掉破碎的混凝土，应该重新使用它。这项研究通过将碎混凝土用作沥青混合料中的骨料的替代品，探索了在路面施工应用中重新使用碎混凝土的可行性。该研究的重点是压碎混凝土的物理性能及其在集料压实后的降解。特别是考虑到其吸收和耐磨性。普遍接受的建议是将粉碎的混凝土与天然来源的常规骨料混合。这项研究评估了不同比例和等级的常规骨料和再生混凝土骨料（RCA）混合物的适用性。使用5毫米骨料通过筛和1.18毫米保留筛对六种不同的比例（0％，20％，40％，60％，80％和100％）和五种等级的水泥混凝土进行了评估。使用马歇尔压实机对所得混合物进行20、40、60、80或100次吹塑的压实。研究结果表明，压碎的混凝土以及具有推荐筛孔尺寸范围的混合物和常规骨料适用于交通量中等的道路。

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