生物沥青再生沥青结合料使用性能
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摘要
为研究生物沥青用作沥青再生剂的可能性,选用蓖麻油生物沥青为再生剂制备再生沥青,并通过试验研究了旋转薄膜烘箱(rolling thin film oven,RTFO)老化前后该种生物沥青掺量对再生沥青相关技术指标的影响.结果表明:随着生物沥青掺量的增加,再生沥青针入度增大,软化点降低,30%掺量的生物沥青可将老化沥青的针入度恢复到原样沥青水平.然而,生物沥青对延度的改善较差.此外,再生沥青135℃黏度、当量软化点和当量脆点降低,针入度指数PI和塑性温度范围逐渐增大,RTFO老化后残留针入度比减小,软化点增量、黏度老化指数逐渐增大.生物沥青的加入改善了再生沥青的感温性能和低温性能,对高温性能表现出不利影响.随着生物沥青掺量的增加,再生沥青抗老化性能逐渐减弱,但在30%掺量范围内,生物沥青再生沥青的抗老化性能仍不低于原样沥青水平.
To investigate the feasibility of using bioasphalt as a rejuvenator,castor oil-based bioasphalt was used as a rejuvenator to prepare bioasphalt rejuvenated asphalt. The effects of bioasphalt dosage on related properties of the rejuvenated asphalt binder,before and after rolling thin film oven( RTFO) aging,were investigated by laboratory tests. Results show that the penetration of the rejuvenated asphalt increases with the increment of the bioasphalt content,while the softening point decreases. In terms of penetration,the rejuvenated asphalt containing 30% bioasphalt is almost recovered to a similar level of original asphalt. However,the bioasphalt does not show desired effect on ductility. Additionally,the 135℃ viscosity,equivalent softening point,equivalent fracture point and retained penetration ratio of the rejuvenated asphalts decrease with the increase of the bioasphalt content,while the penetration index,plasticity temperature range,softening point increment and viscosity aging index increase. Namely,the bioasphalt shows a positive effect on the improvement of low temperature behavior and temperature susceptibility,while a negative effect is shown on high temperature behavior and aging resistance.Although,the aging resistance of bioasphalt rejuvenated asphalt is deteriorated with the increase of the bioasphalt content,it is still superior to that of the original asphalt when the content of bioasphal is bellow30%.
To investigate the feasibility of using bioasphalt as a rejuvenator,castor oil-based bioasphalt was used as a rejuvenator to prepare bioasphalt rejuvenated asphalt. The effects of bioasphalt dosage on related properties of the rejuvenated asphalt binder,before and after rolling thin film oven( RTFO) aging,were investigated by laboratory tests. Results show that the penetration of the rejuvenated asphalt increases with the increment of the bioasphalt content,while the softening point decreases. In terms of penetration,the rejuvenated asphalt containing 30% bioasphalt is almost recovered to a similar level of original asphalt. However,the bioasphalt does not show desired effect on ductility. Additionally,the 135℃ viscosity,equivalent softening point,equivalent fracture point and retained penetration ratio of the rejuvenated asphalts decrease with the increase of the bioasphalt content,while the penetration index,plasticity temperature range,softening point increment and viscosity aging index increase. Namely,the bioasphalt shows a positive effect on the improvement of low temperature behavior and temperature susceptibility,while a negative effect is shown on high temperature behavior and aging resistance.Although,the aging resistance of bioasphalt rejuvenated asphalt is deteriorated with the increase of the bioasphalt content,it is still superior to that of the original asphalt when the content of bioasphal is bellow30%.
引文
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[16]曾梦澜,赵宇,潘浩志,等.欧洲岩沥青改性沥青结合料使用性能研究[J].湖南大学学报(自然科学版),2016,43(5):125-130.ZENG M L,ZHAO Y,PAN H Z,et al. An Experimental study on performance of european rock asphalt modified asphalt binder[J]. Journal of Hunan University(Natural Sciences),2016,43(5):125-130.(in Chinese)
[17]张恒龙,谭邦耀,朱崇政.有机蛭石与纳米二氧化钛复配改性沥青的抗老化性能研究[J].中国科技论文,2016,11(7):728-732.ZHANG H L,TAN B Y,ZHU C Z. Effect of organic vermiculite and nano-titanium dioxide on the anti-aging properties of bitumen[J]. China Science Paper,2016,11(7):728-732.(in Chinese)
[18]朱崇政.无机纳米粒子与蛭石复配改性沥青的制备与性能研究[D].长沙:湖南大学,2016:12-20.ZHU C Z. Preparation and properties of inorganic nanoparticles and vermiculite compound modified bitumen[D]. Changsha:Hunan University,2016:12-20.(in Chinese)
[2]汪海年,高俊锋,尤占平,等.路用生物沥青研究进展[J].武汉理工大学学报,2014,36(7):55-60.WANG H N,GAO J F,YOU Z P,et al. Advances in biobinder application on road pavement[J]. Journal of Wuhan University of Technology,2014,36(7):55-60.(in Chinese)
[3] ZARGAR M, AHMADINIA E, ASLI H, et al.Investigation of the possibility of using waste cooking oil as a rejuvenating agent for aged bitumen[J]. Journal of Hazardous Materials,2012,s 233/234(10):254-258.
[4] ASLI H, AHMADINIA E, ZARGAR M, et al.Investigation on physical properties of waste cooking oil—rejuvenated bitumen binder[J]. Construction and Building Materials,2012,37(12):398-405.
[5] NIGEN S,POROT L. Rejuvenating agent and process for recycling of asphalt:CA,US7811372[P]. 2010.
[6] GONG M H,YANG J,ZHANG J Y,et al. Physicalchemical properties of aged asphalt rejuvenated by bio-oil derived from biodiesel residue[J]. Construction and Building Materials,2016,105:35-45.
[7] CHEN M Z, XIAOF P, PUTMAN B, et al. High temperature properties of rejuvenating recovered binder with rejuvenator,waste cooking and cotton seed oils[J].Construction and Building Materials,2014,59:10-16.
[8] CHEN M Z,LENG B B,WU S P,et al. Physical,chemical and rheological properties of waste edible vegetable oil rejuvenated asphalt binders[J]. Construction and Building Materials,2014,66:286-298.
[9]曾梦澜,潘浩志,田振,等.老化对生物沥青改性沥青结合料使用性能的影响[J].公路工程,2016,41(2):28-32.ZENG M L,PAN H Z,TIAN Z,et al. Aging effects on performance of asphalt binder modified with bioasphalt[J]. Highway Engineering,2016,41(2):28-32.(in Chinese)
[10]交通运输部公路科学研究院.公路沥青路面再生技术规范:JTG F41—2008[S].北京:人民交通出版社,2008:6-10.
[11]交通运输部公路科学研究院.公路工程沥青及沥青混合料试验规程:JTG E20—2011[S].北京:人民交通出版社,2011:10-124.
[12]张金升,贺中国,王彦敏,等.道路沥青材料[M].哈尔滨:哈尔滨工业大学出版社,2013:122-125.
[13]汪海年,高俊锋,赵欣,等.基于DSR和RV的生物沥青结合料流变特性研究[J].湖南大学学报(自然科学版),2015,42(6):26-33.WANG H N,GAO J F,ZHAO X,et al. Rheological properties on bio-binder based on DSR and RV[J].Journal of Hunan University(Natural Sciences),2015,42(6):26-33.(in Chinese)
[14]黄卫东,孙立军,张志全,等.沥青针入度指数的研究[J].同济大学学报(自然科学版),2005,33(3):306-310.HUANG W D,SUN L J,ZHANG Z Q,et al. Study on penetration index[J]. Journal of Tongji University(Natural Sciences),2005,33(3):306-310.(in Chinese)
[15]交通部公路科学研究所.公路沥青路面施工技术规范:JTG F40—2004[S].北京:人民交通出版社,2005:8-12.
[16]曾梦澜,赵宇,潘浩志,等.欧洲岩沥青改性沥青结合料使用性能研究[J].湖南大学学报(自然科学版),2016,43(5):125-130.ZENG M L,ZHAO Y,PAN H Z,et al. An Experimental study on performance of european rock asphalt modified asphalt binder[J]. Journal of Hunan University(Natural Sciences),2016,43(5):125-130.(in Chinese)
[17]张恒龙,谭邦耀,朱崇政.有机蛭石与纳米二氧化钛复配改性沥青的抗老化性能研究[J].中国科技论文,2016,11(7):728-732.ZHANG H L,TAN B Y,ZHU C Z. Effect of organic vermiculite and nano-titanium dioxide on the anti-aging properties of bitumen[J]. China Science Paper,2016,11(7):728-732.(in Chinese)
[18]朱崇政.无机纳米粒子与蛭石复配改性沥青的制备与性能研究[D].长沙:湖南大学,2016:12-20.ZHU C Z. Preparation and properties of inorganic nanoparticles and vermiculite compound modified bitumen[D]. Changsha:Hunan University,2016:12-20.(in Chinese)