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Crushing Characteristics of Coarse Aggregates for Asphalt Mixtures under Simulated Laboratory Compaction Loads and Repeated Traffic Loads.

作者信息

Jiang Shijia, Yu Hao, Mo Liantong

机构信息

School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.

State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.

出版信息

Materials (Basel). 2022 Aug 25;15(17):5865. doi: 10.3390/ma15175865.

DOI:10.3390/ma15175865
PMID:36079246
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9457100/
Abstract

The crushing characteristics of coarse aggregates for asphalt concrete were investigated under static and dynamic aggregate crushing value tests (ACVTs). The effect of various compaction loads was also examined by using a Marshall hammer, gyratory compactor and steel roller. Six types of coarse aggregates were tested, including basalt aggregate, steel slag, limestone aggregate, marble aggregate, recycled concrete aggregate and slightly weathered limestone aggregate. Test results indicate that static ACVT failed to reflect the crushing behavior of coarse aggregates under traditional traffic and compaction loads. The type of aggregate strongly influenced the crushing resistance, independent of type of load. The compaction loads simulated by using a Marshall hammer, gyratory compactor and steel roller resulted in a high aggregate breakage ratio and can distinguish the coarse aggregates with high crushing susceptibility. The crushing resistance was evaluated by using various crushing parameters and the corresponding critical value of these parameters was established. Gyratory compactor compaction resulted in more serious aggregate crushing when compared to Marshall hammer and steel roller compaction. Finite element modelling results on roller compaction and Marshall hammer compaction are in agreement with the aggregate crushing results. The aggregate crushing mechanism was found to be controlled by the fracture mode; the contribution of the attrition and abrasion modes was relatively small. When coarse aggregates with low crushing resistance are considered for the use for asphalt mixture, proper compaction is proved to be vital to prevent excessive aggregate breakage during mixture preparation and construction.

摘要
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/a6d711d9e074/materials-15-05865-g020.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/34397b1ca2c7/materials-15-05865-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/35bf970b2def/materials-15-05865-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/8f67d3f2e260/materials-15-05865-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/82d3b877a0cd/materials-15-05865-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/7239011dd85b/materials-15-05865-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/3e2969072fdc/materials-15-05865-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/277b94cde145/materials-15-05865-g003.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/5ecf50f4d441/materials-15-05865-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/7b5f3cf5cc8f/materials-15-05865-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/95e55073cdce/materials-15-05865-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/73a0035fd08d/materials-15-05865-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/c7bb7da855ed/materials-15-05865-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/7dfcdbf5741e/materials-15-05865-g014.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/c3231c98901d/materials-15-05865-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/d7674e1e2b52/materials-15-05865-g017.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/46bc18ccd4bc/materials-15-05865-g018.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/9964c84cad18/materials-15-05865-g019.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/a6d711d9e074/materials-15-05865-g020.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/34397b1ca2c7/materials-15-05865-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/35bf970b2def/materials-15-05865-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/8f67d3f2e260/materials-15-05865-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/82d3b877a0cd/materials-15-05865-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/7239011dd85b/materials-15-05865-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/3e2969072fdc/materials-15-05865-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/277b94cde145/materials-15-05865-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/a64c9fc5ecb2/materials-15-05865-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/5ecf50f4d441/materials-15-05865-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/7b5f3cf5cc8f/materials-15-05865-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/95e55073cdce/materials-15-05865-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/73a0035fd08d/materials-15-05865-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/c7bb7da855ed/materials-15-05865-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/7dfcdbf5741e/materials-15-05865-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/ffee35191b09/materials-15-05865-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/c3231c98901d/materials-15-05865-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/d7674e1e2b52/materials-15-05865-g017.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/46bc18ccd4bc/materials-15-05865-g018.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/9964c84cad18/materials-15-05865-g019.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3c2/9457100/a6d711d9e074/materials-15-05865-g020.jpg

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