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Performance Evaluation of Stone Mastic Asphalt Involving Coarse Steel Slag and Fine RAP.

作者信息

Wu Yan, Cao Weidong, Xu Chao, Meng Fanshuo, Wang Guangyong, Liu Shutang

机构信息

Qilu Expressway Co., Ltd., Jinan 250100, China.

School of Qilu Transportation, Shandong University, Jinan 250002, China.

出版信息

Materials (Basel). 2025 Jun 2;18(11):2598. doi: 10.3390/ma18112598.

DOI:10.3390/ma18112598
PMID:40508595
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12156236/
Abstract

Stone mastic asphalt (SMA) is the most widely adopted asphalt mixture on highway pavement in China. However, the cost of SMA is rising continually due to the increasing shortage of high-quality basalt aggregate. On the other hand, China's steel slag and reclaimed asphalt pavement (RAP) stock is abundant, and steel slag has excellent strength and wear-resistant performance, which can fully or partially replace part of the basalt aggregate. The content of asphalt may be increased due to the porosity of the steel slag. If fine RAP rich in asphalt is also used for SMA, it can partially fill the voids of steel slag and reduce the amount of new asphalt and fine aggregate. For this objective, SMA 13 was designed with two particle sizes of coarse steel slag aggregate (5-10 mm, 10-15 mm) and one fine RAP (0-5 mm), named SR-SMA. The fundamental pavement performance of SR-SMA was evaluated through a wheel-tracking test, low-temperature beam bending test, freeze-thaw indirect tensile test, and four-point bending fatigue test. For comparison, the mix design and performance tests of two SMAs involving coarse steel slag and fine basalt aggregate (named SB-SMA), and coarse and fine basalt aggregates (named B-SMA), respectively, were conducted. The results indicated that SR-SMA (dynamic stability of 4865 passes/mm) shows the best rutting resistance, followed by SB-SMA (dynamic stability of 4312 passes/mm), and B-SMA (dynamic stability of 4135 passes/mm) comes in last. Additionally, the dynamic stability values of three SMAs have significant differences. SR-SMA has better low-temperature cracking resistance with a failure strain of 3150 με, between SB-SMA and B-SMA (failure strain values are 4436, 2608 με). Compared to B-SMA and SB-SMA, the moisture stability of SR-SMA is relatively poor but meets Chinese specification. While the fatigue resistance of SR-SMA is the worst among three SMAs, their differences are insignificant. Furthermore, SR-SMA reduces material cost by approximately 35% per ton compared to conventional B-SMA. Overall, SR-SMA is cost-effective and can be used as an alternative material to traditional B-SMA.

摘要
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/0db1aa7f16ab/materials-18-02598-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/886300bdbf7c/materials-18-02598-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/a577840b2cda/materials-18-02598-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/c5a40c738859/materials-18-02598-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/ed8a172e156c/materials-18-02598-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/cb70652cf070/materials-18-02598-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/fee2735c85a4/materials-18-02598-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/d4aee2bc3d2a/materials-18-02598-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/9b89703baabf/materials-18-02598-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/5ed858a74481/materials-18-02598-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/0db1aa7f16ab/materials-18-02598-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/886300bdbf7c/materials-18-02598-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/a577840b2cda/materials-18-02598-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/c5a40c738859/materials-18-02598-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/ed8a172e156c/materials-18-02598-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/cb70652cf070/materials-18-02598-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/fee2735c85a4/materials-18-02598-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/d4aee2bc3d2a/materials-18-02598-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/9b89703baabf/materials-18-02598-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/5ed858a74481/materials-18-02598-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a42/12156236/0db1aa7f16ab/materials-18-02598-g010.jpg

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本文引用的文献

1
Quantitative Assessment of Road Performance of Recycled Asphalt Mixtures Incorporated with Steel Slag.掺钢渣再生沥青混合料路用性能的定量评估
Materials (Basel). 2022 Jul 19;15(14):5005. doi: 10.3390/ma15145005.
2
Characterization of Sustainable Asphalt Mixtures Containing High Reclaimed Asphalt and Steel Slag.含高再生沥青和钢渣的可持续沥青混合料的特性研究
Materials (Basel). 2021 Aug 30;14(17):4938. doi: 10.3390/ma14174938.
3
Evaluation of steel slag coarse aggregate in hot mix asphalt concrete.热拌沥青混凝土中钢渣粗集料的评价
J Hazard Mater. 2009 Jun 15;165(1-3):300-5. doi: 10.1016/j.jhazmat.2008.09.105. Epub 2008 Oct 7.