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建筑废弃物再生粉末在沥青混凝土中作为填料的应用

Utilization of Construction Waste Recycled Powder as Filler in Asphalt Concrete.

作者信息

Guo Zemeng, Chen Zongwu

机构信息

Zhejiang Zhongnan Construction Group Co., Ltd., Hangzhou 310052, China.

Faculty of Engineering, China University of Geosciences (Wuhan), Wuhan 430074, China.

出版信息

Materials (Basel). 2022 Aug 19;15(16):5742. doi: 10.3390/ma15165742.

DOI:10.3390/ma15165742
PMID:36013879
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9416733/
Abstract

Processing construction waste into aggregate and reusing it in asphalt pavement is beneficial in terms of environmental protection and resource utilization. However, recycled aggregate (RA) possesses some property defects. Therefore, RA usually needs to be strengthened by modification technologies prior to use. In order to promote the convenient and low-cost utilization of construction waste, a new method of preparing construction waste into powder and using recycled powder (RP) as asphalt filler is proposed in this research. The property defects of RA and the applicability of RP used as filler were first analyzed based on their material characteristics. Then, asphalt concrete with RP was designed according to the Superpave method, and the engineering performance of the asphalt mixture was further investigated. According to the results, we recommend the use of acidic RP in combination with other highly alkaline fillers, such as Portland cement (PC), with a suitable blending ratio of RP to PC of 1:1. Preparing asphalt concrete with filler composed of RP and PC can achieve satisfactory engineering performance.

摘要

将建筑废弃物加工成集料并在沥青路面中再利用，在环境保护和资源利用方面是有益的。然而，再生集料（RA）存在一些性能缺陷。因此，RA在使用前通常需要通过改性技术进行强化。为了促进建筑废弃物的便捷和低成本利用，本研究提出了一种将建筑废弃物制备成粉末并将再生粉末（RP）用作沥青填料的新方法。首先根据RA和RP的材料特性分析了RA的性能缺陷以及RP用作填料的适用性。然后，按照Superpave方法设计了含RP的沥青混凝土，并进一步研究了沥青混合料的工程性能。根据结果，我们建议使用酸性RP与其他高碱性填料（如波特兰水泥（PC））组合，RP与PC的合适掺配比例为1:1。用由RP和PC组成的填料制备沥青混凝土可以获得令人满意的工程性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3b3/9416733/abfc3e485bf0/materials-15-05742-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3b3/9416733/abfc3e485bf0/materials-15-05742-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3b3/9416733/df6d5806eb4b/materials-15-05742-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3b3/9416733/0c431aaab1e7/materials-15-05742-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3b3/9416733/83f8d5c6b409/materials-15-05742-g004.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3b3/9416733/225179023b01/materials-15-05742-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3b3/9416733/6fc633c451ff/materials-15-05742-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3b3/9416733/9126ed2c66bc/materials-15-05742-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3b3/9416733/a5b43dd1ec11/materials-15-05742-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3b3/9416733/020861afc507/materials-15-05742-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3b3/9416733/abfc3e485bf0/materials-15-05742-g012.jpg

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