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首页> 外文期刊>Construction and Building Materials >Enhanced washing resistance of photocatalytic exposed aggregate cementitious materials based on g-C_3N_4 nanosheets-recycled asphalt pavement aggregate composites
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Enhanced washing resistance of photocatalytic exposed aggregate cementitious materials based on g-C_3N_4 nanosheets-recycled asphalt pavement aggregate composites

机译：基于g-C_3N_4纳米片-再生沥青路面骨料复合材料的光催化暴露的骨料胶凝材料的耐洗性增强

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The photocatalytic exposed aggregate cementitious materials (PEACM) have been proposed and successfully utilized for environmental remediation in recent years. In this work, we develop a novel photocatalytic recycled asphalt pavement aggregate (PRAPA), namely g-C3N4 nanosheets-recycled asphalt pavement aggregate composites. The cohesive property of residual asphalt is beneficial to the attachment of g-C3N4 nanosheets (CNNs) on the surface of recycled asphalt pavement aggregate (RAPA) due to a strong bond between CNNs and RAPA. The results show that with a higher concentration of CNNs suspension, the NOx removal efficiency of both the PRAPA and the associated PEACM increases first and then tends to be constant. Compared with the CNNs-standard sand composites and the associated PEACM, the PRAPA and the associated PEACM hold the higher photocatalytic activity and better resistance to rain wash, respectively. The findings of this work provide a new route for preparation of highly cost-effective photocatalytic building materials, and contribute to a desirable option for recycling waste asphalt mixtures. (C) 2019 Elsevier Ltd. All rights reserved.
机译：近年来，提出了光催化暴露的骨料胶凝材料（PEACM），并成功地将其用于环境修复。在这项工作中，我们开发了一种新型的光催化再生沥青路面骨料（PRAPA），即g-C3N4纳米片材-再生沥青路面骨料复合材料。由于CNN和RAPA之间的牢固结合，残余沥青的内聚性有利于g-C3N4纳米片（CNN）在再生沥青路面骨料（RAPA）上的附着。结果表明，随着CNNs悬浮液浓度的升高，PRAPA和相关PEACM的NOx去除效率首先增加，然后趋于恒定。与CNNs标准砂复合材料和相关的PEACM相比，PRAPA和相关的PEACM分别具有更高的光催化活性和更好的耐雨水冲刷性。这项工作的发现为制备高成本效益的光催化建筑材料提供了一条新途径，并为回收废沥青混合物提供了理想的选择。 （C）2019 Elsevier Ltd.保留所有权利。

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