多次孔隙水压作用下沥青混合料性能演化试验

doi:10.13229/j.cnki.jdxbgxb20200225

摘要/Abstract

摘要：

为研究沥青混合料在水-力共同作用下的性能演化过程，在实验室内制备了3种不同沥青含量（3.5%、4.5%、5.5%）的SBS改性沥青混合料试件，利用沥青混合料水敏感性试验（MIST）进行不同次数（500次~7000次）孔隙水压作用的湿度处理，通过湿度处理后试件的物理指标（体积、毛体积密度）来表征沥青混合料的内部结构变化。利用间接拉伸试验（IDT）测得的不同孔隙水压作用次数下的ITS以及TSR来表征沥青混合料力学性能的演化过程。结果发现：随着孔隙水压作用次数的增加，试件内部结构发生了变化，导致试件体积先增大、后减小，毛体积密度有微小的下降。ITS以及TSR结果表明，试件力学性能先降低、后上升。在对不同MIST作用次数湿度处理后试件的含水率进行测量后发现：500次孔隙水压循环是试件由不饱和状态向饱和状态转变的临界作用次数。小于500次作用时，试件未饱和，MIST循环产生孔隙水压较大，因此力学性能不断降低；大于500次作用时，试件已饱和，温度作用取代孔隙水压作用成为主要影响，导致力学性能上升。因此，对于孔隙率为4%左右的小型密级配沥青混合料试件，推荐采用500次MIST循环作为湿度处理来进行沥青混合料的抗水损害能力的评价。

关键词: 多次孔隙水压作用, 沥青混合料水敏感性试验, 间接拉伸试验, 性能演化

Abstract:

To study the performance evolution of asphalt mixture under the impact of multiple pore water pressure cycles, three kinds of SBS modified asphalt mixture specimens with different asphalt content (3.5%, 4.5% and 5%) were prepared. Different cycles of pore water pressure (500 to 7000 cycles) were applied on specimens by Moisture Induced Sensitivity Tester (MIST), and then the change of internal structure of asphalt mixture is characterized by the physical indicators (volume, bulk relative density) of the moisture conditioned specimens. Indirect Tensile Strength (ITS) and Tensile Strength Ratio (TSR) under different times of pore water pressure measured by Indirect Tensile Test (IDT) are used to characterize the evolution of mechanical properties of asphalt mixture. The results show that the volume of the specimens increases first and then decreases, the Bulk Relative Density (BRD) slightly decreases with the pore water pressure cycles. ITS and TSR results show that the mechanical properties decrease first and then improve. It is found that 500 pore water pressure cycles are the critical times for specimens to change from unsaturated state to saturated state. When cycles are less than 500, the specimens are unsaturated and the pore water pressure produced by MIST is large, so the mechanical properties are continuously reduced. When cycles are higher than 500, the specimens are saturated, MIST cycle has little contribution to pore water pressure and the effect of temperature becomes the main impact, resulting in the improvement of mechanical properties. Thus, for the small dense asphalt mixture specimen with porosity of about 4%, it is recommended to use 500 MIST cycles as moisture condition to evaluate the water damage resistance of asphalt mixture.

Key words: multiple pore water pressure, moisture induced sensitivity test, indirectly tensile test, performance evolution

中图分类号:

U416.217

任敏达,丛林,孙思林,冯汉卿. 多次孔隙水压作用下沥青混合料性能演化试验[J]. 吉林大学学报(工学版), 2021, 51(4): 1277-1286.

Min-da REN,Lin CONG,Si-lin SUN,Han-qing FENG. Experiment of performance evolution of asphalt mixtures under multiple pore water pressure cycles[J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(4): 1277-1286.

图/表 11

图1

图2

表1

图3

图4

图5

图6

图7

图8

图9

图10

参考文献 22

1	Shakiba Maryam,Darabi Masoud K, K Abu Al-Rub Rashid, et al. Constitutive modeling of the coupled moisture-mechanical response of particulate composite materials with application to asphalt concrete[J]. Journal of Engineering Mechanics, 2015, 141(2):24.
2	Gorkem C, Sengoz B. Predicting stripping and moisture induced damage of asphalt concrete prepared with polymer modified bitumen and hydrated lime[J]. Construction & Building Materials, 2009, 23(6):2227-2236.
3	de Carlo C, Dave E, Sias G Airey J, et al. Comparative evaluation of moisture susceptibility test methods for routine usage in asphalt mixture design[J]. Journal of Testing and Evaluation,2020, 48(1): 88-106.
4	Shu X, Huan B, Shrum E, et al. Evaluation of moisture damage in hot mix asphalt using simple performance and superpave indirect tensile tests[J]. Construction and Building Materials,2012:22: 1950-1962.
5	AA. Resistance of compacted hot mix asphalt (HMA) to moisture-induced damage[S].American Association of State Highway and Transportation Officials, Washington, DC, 2011.
6	Hicks R G, Santucci L, Ashchenbrener T. Introduction and seminar objectives on moisture sensitivity of asphalt pavements[C]∥Transportation Research Board National Seminar, Transportation Research Board of the National Academies, San Diego, California, 2003: 3-19.
7	Epps J P E, Sebaaly J, Penaranda M R, et al. Compatibility of a test for moisture-induced damage with superpave volumetric design[R]. NCHRP Report 444, Transportation Research Board of the National Academies, 2000.
8	Solaimanian M, Kennedy T W. Precision of the Moisture Susceptibility Test Method Tex 531-C[R]. Research Report4909-1
	F, Center for Transportation Research, University of Texas at Austin, 2000.
9	Azari H. Precision estimates of AASHTO T283: resistance of compacted hot mix asphalt (HMA) to moisture-induced damage[R]. Web-Only Document 166, Final Task Report for N-CHRP Project9-26
	A, Transportation Research Board, 2010.
10	Jimenez R A. Testing of debonding of asphalt from aggregates[C]∥Transportation Research Board of the National Academies, Washington, DC, 1974: 1-17.
11	Mallick R B, Gould J S, Bhattacharjee S, et al. Development of a rational procedure for evaluation of moisture susceptibility of asphalt paving mixes[S].Transportation Research Board Annual Meeting, Transportation Research Board of the National Academies, Washington DC, 2003.
12	ASTM International. D7870/D7870M-20 standard practice for moisture conditioning compacted asphalt mixture specimens by using hydrostatic pore pressure[R]. West Conshohocken, PA; ASTM International, 2020.
13	Gao J Q, Chen H, Ji T J, et al. Measurement of dynamic hydraulic pressure in asphalt pavement using fiber bragg grating[J]. Transducer and Microsystem Technologies, 2009, 28(9): 59-61.
14	Vishala Utsav, Golib Arunkumar, Chowdaryc Venkaiah. Comparison of AASHTO T283 and moisture induced sensitivity tester conditioning process on the moisture resistance of bituminous concrete mixtures[C]∥The 3rd Conference of Transportation Research Group of India,Mumbai, India, 2018.
15	Mohiuddin Ahmad, Amina Mannan Umme, Rashadul Islam Md, et al. Tarefder: chemical and mechanical changes in asphalt binder due to moisture conditioning[J]. Road Materials and Pavement Design, 2018, 19(5):1216-1229.
16	Tarefder R, Weldegiorgis M, Ahmad M. Assessment of the effect of pore pressure cycles on moisture sensitivity of hot mix asphalt using mist conditioning and dynamic modulus[J]. Journal of Testing and Evaluation, 2014, 42(6): 1530-1540.
17	李达. 旧料掺量对温拌再生沥青混合料耐久性的影响分析[J]. 长安大学学报:自然科学版, 2018, 38(5):31-37, 54.
	Li Da. Influence of RAP content on durability of warm-mix recycled asphalt mixture[J]. Journal of Chang'an University(Natural Science Edition), 2018,38(5):31-37, 54.
18	Chen X, Huang B. Evaluation of moisture damage in hot mix asphalt using simple performance and superpave indirect tensile tests[J]. Construction and Building Materials, 2008, 22(9):1950-1962.
19	周水文, 张晓华, 张蓉, 等. 再生剂对热再生混合料性能影响研究[J]. 石油沥青, 2018, 32(4):6-11.
	Zhou Shui-wen, Zhang Xiao-hua, Zhang Rong,et al. Research on the influence of recycling agent to hot recycling mixture performance[J]. Petroleum Asphalt, 2018, 32(4):6-11.
20	周水文, 张蓉, Mouhamed,等. MIST评价乳化沥青冷再生混合料水稳性研究[J]. 中外公路, 2017(3):208-211.
	Zhou Shui-wen, Zhang Rong, Mouhamed, et al. Study on water stability evaluation of emulsified asphalt cold recycling mixture by MIST[J]. Journal of China & Foreign Highway, 2017(3):208-211.
21	LaCroix A, Regimand A, James L. Proposed approach for evaluation of cohesive and adhesive properties of asphalt mixtures for determination of moisture sensitivity[C]∥Journal of Transportation Research Board, 2016,2575: 61-69.
22	Stuart K D. Moisture damage in asphalt mixtures: a state of art report[R]. Research Development and Technology, Turner-Fairbank Highway Research Center, 1990.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

沥青含量/%	毛体积密度/（g· cm^-3）	空隙率/%	矿料间隙率/%	沥青饱和度/%	马歇尔稳定度/kN	流值/mm
3.5	2.46	4	12.6	68	14.2	5.35
4.5	2.48	2	13.0	87	16.9	4.04
5.5	2.48	0	13.3	100	16.1	5.66