SmartRock-Based Research on Gyratory Locking Point for Stone Mastic Asphalt Mixture
For gyratory compaction, the concept of the locking point was initially developed to identify the compactability of asphalt mixes and to alleviate potential aggregate crushing in the mold. Most previous studies on the locking point were based on specimens’ height change. Recent studies have indicate...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/12/2/97 |
| _version_ | 1827656416608911360 |
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| author | Zhiqiang Cheng De Zhang Shengjia Xie Pawel Andrzej Polaczyk Tao Wang |
| author_facet | Zhiqiang Cheng De Zhang Shengjia Xie Pawel Andrzej Polaczyk Tao Wang |
| author_sort | Zhiqiang Cheng |
| collection | DOAJ |
| description | For gyratory compaction, the concept of the locking point was initially developed to identify the compactability of asphalt mixes and to alleviate potential aggregate crushing in the mold. Most previous studies on the locking point were based on specimens’ height change. Recent studies have indicated that the gyratory locking point of cold mix asphalt mixtures could be determined by the rotation angle range indicator using SmartRock. However, height or rotation angle change ultimately reflects a change in volume. Additionally, there is no clear physical and mechanical connection between the volume change and the gyratory locking point. In this paper, a stone mastic asphalt mixture (SMA 13) was selected for gyratory compaction applying various compaction temperatures. The compaction data were recorded by a SmartRock embedded in different positions. Collected data included stress, rotation angle, and acceleration. The major findings are as follows: (1) the specimen’s locking point could be determined based on a representative stress value when the SmartRock was embedded in the specimen’s center, and the results are close to the traditional evaluation results (LP3 or LP2-2-3); (2) the representative rotation angle value reached a plateau earlier than the representative stress value; (3) the representative acceleration value is not suitable for characterizing the interlocking process during gyratory compaction. |
| first_indexed | 2024-03-09T22:26:12Z |
| format | Article |
| id | doaj.art-8f4319a1c9934cc5b79d4f7dfb3e1ecf |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-09T22:26:12Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-8f4319a1c9934cc5b79d4f7dfb3e1ecf2023-11-23T19:04:52ZengMDPI AGBuildings2075-53092022-01-011229710.3390/buildings12020097SmartRock-Based Research on Gyratory Locking Point for Stone Mastic Asphalt MixtureZhiqiang Cheng0De Zhang1Shengjia Xie2Pawel Andrzej Polaczyk3Tao Wang4Shanghai Road and Bridge (Group) Co., Ltd., Shanghai 200433, ChinaShanghai Road and Bridge (Group) Co., Ltd., Shanghai 200433, ChinaShanghai Road and Bridge (Group) Co., Ltd., Shanghai 200433, ChinaDepartment of Civil and Environmental Engineering, The University of Tennessee, Knoxville, TN 37996, USADepartment of Highway and Railway Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, ChinaFor gyratory compaction, the concept of the locking point was initially developed to identify the compactability of asphalt mixes and to alleviate potential aggregate crushing in the mold. Most previous studies on the locking point were based on specimens’ height change. Recent studies have indicated that the gyratory locking point of cold mix asphalt mixtures could be determined by the rotation angle range indicator using SmartRock. However, height or rotation angle change ultimately reflects a change in volume. Additionally, there is no clear physical and mechanical connection between the volume change and the gyratory locking point. In this paper, a stone mastic asphalt mixture (SMA 13) was selected for gyratory compaction applying various compaction temperatures. The compaction data were recorded by a SmartRock embedded in different positions. Collected data included stress, rotation angle, and acceleration. The major findings are as follows: (1) the specimen’s locking point could be determined based on a representative stress value when the SmartRock was embedded in the specimen’s center, and the results are close to the traditional evaluation results (LP3 or LP2-2-3); (2) the representative rotation angle value reached a plateau earlier than the representative stress value; (3) the representative acceleration value is not suitable for characterizing the interlocking process during gyratory compaction.https://www.mdpi.com/2075-5309/12/2/97gyratory compactionSmartRockstone mastic asphaltstressrotation angle |
| spellingShingle | Zhiqiang Cheng De Zhang Shengjia Xie Pawel Andrzej Polaczyk Tao Wang SmartRock-Based Research on Gyratory Locking Point for Stone Mastic Asphalt Mixture Buildings gyratory compaction SmartRock stone mastic asphalt stress rotation angle |
| title | SmartRock-Based Research on Gyratory Locking Point for Stone Mastic Asphalt Mixture |
| title_full | SmartRock-Based Research on Gyratory Locking Point for Stone Mastic Asphalt Mixture |
| title_fullStr | SmartRock-Based Research on Gyratory Locking Point for Stone Mastic Asphalt Mixture |
| title_full_unstemmed | SmartRock-Based Research on Gyratory Locking Point for Stone Mastic Asphalt Mixture |
| title_short | SmartRock-Based Research on Gyratory Locking Point for Stone Mastic Asphalt Mixture |
| title_sort | smartrock based research on gyratory locking point for stone mastic asphalt mixture |
| topic | gyratory compaction SmartRock stone mastic asphalt stress rotation angle |
| url | https://www.mdpi.com/2075-5309/12/2/97 |
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