|
|
|
| AC-20 gradation optimization based on triaxial test |
| School of Highway, Chang′an University, Xi′an, Shaanxi 710064, China |
|
|
|
|
Abstract To improve the high temperature stability of asphalt mixture, the three-axis numerical test method of asphalt mixture was constructed by partical flow code in 3 dimensions (PFC3D), and the reliability was evaluated by indoor triaxial test. The effects of coarse aggregate grading, fine aggregate grading and coarse aggregate ratio on the shear strength of asphalt mixture were investigated by numerical triaxial test and laboratory test. The AC-20 mineral gradation was proposed based on the shear strength, and the road performance was verified according to the effects of 19.000, 4.750, 0.075 mm mesh pass rates on AC-20 performance. The results show that the three-axis numerical test of asphalt mixture has good similarity with the indoor test. When the volume ratio of coarse aggregates of 19.000~26.500，16.000~19.000，13.200 ~16.000，9.500~13.200 and 4.750~9.500 mm is 4 ∶12 ∶4 ∶10 ∶15, and the fine aggregate takes the corresponding gradation for I equaling to 0.75 with the volume ratio of coarse aggregate of 60 ∶40, the asphalt mixture has the highest shear strength. The coarse aggregates are recommended to be 19.000, 4.750 and 0.075 mm with the pass rate ranges of 90.0%~100.0%, 35.0%~45.0% and 4.0%~7.0%, respectively, and the AC-20 optimized gradation is proposed based on shear strength. Compared with the standard gradation, the shear strength and the dynamic stability of the optimized AC-20 gradation are increased by 26% and 29%, respectively.
|
|
Received: 04 March 2019
|
|
|
|
| ［1］ |
KHODAII A , HAGHSHENAS H F , TEHRANI H K . Effect of grading and lime content on HMA stripping using statistical methodology\[J\]. Construction & Buil-ding Materials, 2012, 34:131-135.
|
| ［2］ |
HUANG X, YUAN L, WEI R M, et al. Optimization design and research on gradation of ATB-25\[J\]. Advanced Materials Research, 2013，671:1225-1230.
|
| ［3］ |
HUANG W R, LIU T, YANG D L.Research of gra-ding′s influence on asphalt mixture′s water stability\[C\]∥IEEE International Conference on Automation & Logistics. Piscataway，USA:IEEE, 2011:456-460.
|
| ［4］ |
LIU H F, QIAN G P, ZHENG J L, et al. Investigation into gradation optimization of hot mix asphalt\[C\]∥Pavements and Materials: Recent Advances in Design, Testing and Construction,2011:250-258.
|
| ［5］ |
蒋玮, 沙爱民, 肖晶晶,等. 基于抗车辙稳定性的多孔沥青混合料级配优化\[J\]. 华南理工大学学报(自然科学版), 2012, 40(11):127-132.
|
|
JIANG W, SHA A M, XIAO J J, et al. Gradation optimization of porous asphalt mixture based on rutting stability\[J\]. Journal of South China University of Techno-logy(Natural Science Edition), 2012, 40(11):127-132. (in Chinese)
|
| ［6］ |
张业茂,陈拴发,胡光伟. 逐级填充式沥青混合料粗集料骨架级配设计\[J\]. 武汉理工大学学报,2011, 33(11):44-48，59.
|
|
ZHANG Y M, CHEN S F, HU G W. Coarse aggregate gradation design of asphalt mixture by gradually filling test \[J\]. Journal of Wuhan University of Technology, 2011, 33 (11):44-48，59. ( in Chinese)
|
| ［7］ |
陈志忠. AC-20改性沥青混合料矿料级配优化研究\[J\]. 合肥工业大学学报(自然科学版),2009, 32(9):1402-1408.
|
|
CHEN Z Z. Study on optimization of aggregate gradation design for AC-20 modified asphalt mixture in pavement\[J\]. Journal of Hefei University of Technology(Natural Science), 2009, 32(9):1402-1408. (in Chinese)
|
| ［8］ |
陈渊召, 李振霞. 橡胶颗粒沥青混合料的级配设计\[J\]. 公路交通科技, 2012, 29(11):19-24.
|
|
CHEN Y Z, LI Z X. Gradation design of rubber granular asphalt mixture\[J\]. Journal of Highway and Transportation Research and Development, 2012, 29(11):19-24. ( in Chinese)
|
| ［9］ |
黄维蓉,宋涛,何兆益,等. 基于抗车辙性能的AC-13沥青混合料级配范围研究\[J\]. 武汉理工大学学报,2012, 34(5):44-48.
|
|
HUANG W R, SONG T, HE Z Y, et al. Study of AC-13 grading envelope based on rutting resistance perfor-mance for hot-mix asphalt \[J\]. Journal of Wuhan University of Technology, 2012, 34 (5): 44-48. ( in Chinese)
|
| ［10］ |
赵吉坤, 李骅, 张慧清. 基于离散元法的岩土细观破坏及参数影响研究\[J\]. 防灾减灾工程学报, 2013,33(2):218-224.
|
|
ZHAO J K, LI H, ZHANG H Q. Study on meso-scopic failure and parameter influence of rock-soil based on discrete element method \[J\]. Journal of Disaster Prevention and Mitigation Engineering, 2013,33(2): 218-224. ( in Chinese)
|
| ［11］ |
裴建中,常明丰,陈拴发,等.沥青混合料间接拉伸试验的数值模拟\[J\]. 长安大学学报(自然科学版),2010, 30(5):6-10.
|
|
PEI J Z, CHANG M F, CHEN S F, et al. Numerical simulation of indirect tensile test for asphalt mixture \[J\]. Journal of Chang′an University（Natural Science Edition）, 2010, 30(5): 6-10. ( in Chinese)
|
| ［12］ |
蒋应军, 李思超, 王天林. 级配碎石动三轴试验的数值模拟方法\[J\]. 东南大学学报(自然科学版), 2013, 43(3):604-609.
|
|
JIANG Y J, LI S C, WANG T L. Numerical method of dynamic triaxial test on graded crushed rock \[J\]. Journal of Southeast University（Natural Science Edition）, 2013, 43(3):604-609. ( in Chinese)
|
| ［13］ |
朱洪洲,唐伯明,何兆益,等.基于综合性能的沥青混合料组成结构优化\[J\].公路交通科技,2007, 24(10):1-5.
|
|
ZHU H Z,TANG B M,HE Z Y,et al. Research on asphalt mixture constituent structure optimization based on comprehensive performance \[J\]. Journal of Highway and Transportation Research and Development,2007, 24(10):1-5. ( in Chinese)
|
|
|
|
2020, Vol. 41 
