室内老化和自然老化沥青性能及其对应关系研究
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摘要
沥青老化问题关乎沥青路面的耐久性,是道路工程的研究重点之一。而受制于自然老化试验的诸多困难,长期以来沥青老化研究多开展于实验室内,造成了研究与实际应用一定程度上的脱节。以沥青三大指标为载体,对其老化后的性能进行分析研究;以自然老化、室内试验模拟老化及从旧沥青混合料抽提等四种方法获取老化沥青,从而获得了不同老化方式下沥青性能的对应关系。研究结果表明沥青三大指标的变化均能反映沥青的老化过程,其中针入度和延度可较好地作为对应自然老化和室内老化关系的指标。总体上看,经室内TFOT过程的老化程度相当于自然老化60～90d;经室内PAV过程的老化程度相当于自然老化120～140d。
The aging problem of asphalt is highly involved with the durability of asphalt pavement, thus becomes an important research point in road engineering. However, limited by the difficulties of natural aging tests, research on asphalt aging has long been carried out inside the laboratory, which to some extent led to the disconnection between research and practical application. In this article, the three major indicators are taken to study the performance of aged asphalt. Natural aging, indoor simulation aging and extraction from aged asphalt mixture are used to acquire aged asphalt, and the corresponding relationship between the performances of aged asphalt form different aging methods has been discovered. The results show that the three major indicators of asphalt can describe its aging process, and that the penetration and the ductility are the better indicators to correspond natural aging with indoor simulation aging. Generally speaking, after the process of TFOF, the asphalt aging degree is equivalent to that after 60 d to 90 d natural aging. After the process of PAV, the asphalt aging degree is equivalent to that after 120 d to 140 d' s natural aging.
The aging problem of asphalt is highly involved with the durability of asphalt pavement, thus becomes an important research point in road engineering. However, limited by the difficulties of natural aging tests, research on asphalt aging has long been carried out inside the laboratory, which to some extent led to the disconnection between research and practical application. In this article, the three major indicators are taken to study the performance of aged asphalt. Natural aging, indoor simulation aging and extraction from aged asphalt mixture are used to acquire aged asphalt, and the corresponding relationship between the performances of aged asphalt form different aging methods has been discovered. The results show that the three major indicators of asphalt can describe its aging process, and that the penetration and the ductility are the better indicators to correspond natural aging with indoor simulation aging. Generally speaking, after the process of TFOF, the asphalt aging degree is equivalent to that after 60 d to 90 d natural aging. After the process of PAV, the asphalt aging degree is equivalent to that after 120 d to 140 d' s natural aging.
引文
[1]张登良.沥青路面[M].北京:人民交通出版社,1998.
[2] Traxler R N. Relation between asphalt composition and hardening by volatilization and oxidation[C]//Assoc Asphalt Paving Technol Proc. 1961.
[3] Herrington P R, Patrick J E, Ball G F A. Oxidation of Roading Asphalts[J]. Industrial&EngineeringChemistry Research, 2002, 33(11):2801-2809.
[4] Petersen J C, Harnsberger P M, Robertson R E. Factors affecting the kinetics and mechanisms of asphalt oxidation and the relative effects of oxidation products on age hardening[J]. Preprints of Papers,American Chemical Society, Division of Fuel Chemistry, 1996,41(CONF-960807--).
[5] Airey G D. State of the Art Report on Ageing Test Methods for Bituminous Pavement Materials[J]. International Journal of Pavement Engineering, 2003, 4(3):165-176.
[6]沈金安.沥青与沥青混合料路用性能[M].北京:人民交通出版社,2001.
[7] Lewis R H, Welborn J Y. THE PROPERTIES OF THE RESIDUES OF 50-60 AND 85-100 PENETRATION ASPHALTS FROM OVEN TESTS AND EXPOSURE[J]. Public Roads, 1941.
[8] Hveem F N, Zube E, Skog J. PROPOSED NEW TESTS AND SPECIFICATIONS FOR PAVING GRADE ASPHALTS[C]//Association of Asphalt Paving Technologists Proceedings. 1963.
[9] Standard Specification for Performance Graded Asphalt Binder[J]. Astm.
[10] SHRP superior performing asphalt pavements(superpave):the product of SHRP asphalt research program. Strategic Highway Research Program A-410,National Research Council, Washington, DC, 1994.
[11] Braham A F, Buttlar W G, Clyne T R, et al. The effect of long-term laboratory aging on asphalt concrete fracture energy[J]. Journal of the Association of Asphalt Paving Technologists, 2009, 78.
[12]陈华鑫,陈拴发,王秉纲.基质沥青老化行为与老化机理[J].山东大学学报:工学版,2009,39(2):125-130.
[13] Juristyarini P, Davison R, Glover C J. Development of an Asphalt Aging Procedure to Assess Long-Term Binder Performance[J]. Liquid Fuels Technology,2011, 29(21):2258-2268.
[14] Islam M R, Hossain M I, Tarefder R A. A study of asphalt aging using Indirect Tensile Strength test[J]. Construction&Building Materials,2015,95:218-223.
[2] Traxler R N. Relation between asphalt composition and hardening by volatilization and oxidation[C]//Assoc Asphalt Paving Technol Proc. 1961.
[3] Herrington P R, Patrick J E, Ball G F A. Oxidation of Roading Asphalts[J]. Industrial&EngineeringChemistry Research, 2002, 33(11):2801-2809.
[4] Petersen J C, Harnsberger P M, Robertson R E. Factors affecting the kinetics and mechanisms of asphalt oxidation and the relative effects of oxidation products on age hardening[J]. Preprints of Papers,American Chemical Society, Division of Fuel Chemistry, 1996,41(CONF-960807--).
[5] Airey G D. State of the Art Report on Ageing Test Methods for Bituminous Pavement Materials[J]. International Journal of Pavement Engineering, 2003, 4(3):165-176.
[6]沈金安.沥青与沥青混合料路用性能[M].北京:人民交通出版社,2001.
[7] Lewis R H, Welborn J Y. THE PROPERTIES OF THE RESIDUES OF 50-60 AND 85-100 PENETRATION ASPHALTS FROM OVEN TESTS AND EXPOSURE[J]. Public Roads, 1941.
[8] Hveem F N, Zube E, Skog J. PROPOSED NEW TESTS AND SPECIFICATIONS FOR PAVING GRADE ASPHALTS[C]//Association of Asphalt Paving Technologists Proceedings. 1963.
[9] Standard Specification for Performance Graded Asphalt Binder[J]. Astm.
[10] SHRP superior performing asphalt pavements(superpave):the product of SHRP asphalt research program. Strategic Highway Research Program A-410,National Research Council, Washington, DC, 1994.
[11] Braham A F, Buttlar W G, Clyne T R, et al. The effect of long-term laboratory aging on asphalt concrete fracture energy[J]. Journal of the Association of Asphalt Paving Technologists, 2009, 78.
[12]陈华鑫,陈拴发,王秉纲.基质沥青老化行为与老化机理[J].山东大学学报:工学版,2009,39(2):125-130.
[13] Juristyarini P, Davison R, Glover C J. Development of an Asphalt Aging Procedure to Assess Long-Term Binder Performance[J]. Liquid Fuels Technology,2011, 29(21):2258-2268.
[14] Islam M R, Hossain M I, Tarefder R A. A study of asphalt aging using Indirect Tensile Strength test[J]. Construction&Building Materials,2015,95:218-223.
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