稳定型橡胶沥青厂拌热再生混合料性能研究
|
摘要
为提升厂拌热再生沥青路面的使用性能,探索应用稳定型橡胶沥青改善再生混合料综合性能。在试验对比70#道路石油沥青、SBS改性沥青、传统湿法橡胶沥青以及稳定型橡胶沥青等胶结料性质的基础上,基于高模量混合料组成原理对橡胶沥青再生料进行了配合比设计。通过基本性能试验、高温车辙、低温弯曲、冻融劈裂及半圆弯曲试验探究了稳定型橡胶沥青再生料的路用性能。结果表明:稳定型橡胶沥青在针入度、软化点和弹性恢复率等指标方面与SBS改性沥青接近,施工和易性和存储稳定性显著优于传统湿法橡胶沥青;在旧料掺量低于50%的条件下,稳定型橡胶沥青再生混合料的各项路用性能均满足规范要求,高温、低温稳定性及水稳定性得以兼顾;随着旧料掺量的提高,稳定型橡胶沥青再生混合料动态模量、高温抗车辙能力、抗水损能力提高,低温稳定性及抗裂性能有所下降。
In order to improve the comprehensive road performance of asphalt pavement built by hot in-plant recycling technology, the adaptability and improvement of stable asphalt rubber in hotrecycled asphalt mixture was investigated. The elementary physical property of NO. 70 paving asphalt,SBS modified asphalt,traditional asphalt rubber and stable asphalt rubber were analyzed,and the hotrecycled asphalt mixture regenerated by stable asphalt rubber was designed. With regard to EME-20,the effect of RAP content hot-recycled asphalt mixture was studied by simple performance test,rutting test,beam bending test and freeze-thaw splitting experiment. The results show that the stable asphalt rubber is close to SBS modified asphalt in penetration,softening point and elastic recovery rate. Under the condition that the amount of the RAP is less than 50%,road performance of hot-recycled asphalt mixture regenerated by stable asphaltrubber meets standard requirements. Dynamic modulus, high temperature stability and water stability is enhanced with the increase of RAP content, but low temperature stability and crack resistance is weaken.
In order to improve the comprehensive road performance of asphalt pavement built by hot in-plant recycling technology, the adaptability and improvement of stable asphalt rubber in hotrecycled asphalt mixture was investigated. The elementary physical property of NO. 70 paving asphalt,SBS modified asphalt,traditional asphalt rubber and stable asphalt rubber were analyzed,and the hotrecycled asphalt mixture regenerated by stable asphalt rubber was designed. With regard to EME-20,the effect of RAP content hot-recycled asphalt mixture was studied by simple performance test,rutting test,beam bending test and freeze-thaw splitting experiment. The results show that the stable asphalt rubber is close to SBS modified asphalt in penetration,softening point and elastic recovery rate. Under the condition that the amount of the RAP is less than 50%,road performance of hot-recycled asphalt mixture regenerated by stable asphaltrubber meets standard requirements. Dynamic modulus, high temperature stability and water stability is enhanced with the increase of RAP content, but low temperature stability and crack resistance is weaken.
引文
[1]黄晓明,赵永利.沥青路面再生利用理论与实践[M].北京:科学出版社,2014.
[2]马涛,黄晓明,赵永利.SMA路面就地热再生关键技术[M].北京:科学出版社,2016.
[3]周洲.不同RAP料掺量热再生改性沥青混合料耐久性能研究[D].南京:东南大学,2015.
[4]甘新立,郑南翔,刘羽.不同再生方式的再生SBS改性沥青老化性能研究[J].公路工程,2014,39(05):47-49.
[5]王真.SBS改性沥青路面性能恢复技术研究[D].南京:东南大学,2012.
[6]马涛.SMA路面现场热再生技术研究[D].南京:东南大学,2009.
[7]孙祖望.橡胶沥青路面技术应用手册[M].北京:人民交通出版社,2014.
[8]董夏鑫,黄晓明,陈怡林.反应型橡胶改性沥青的微观改性机理分析[J].中外公路,2016,36(05):212-215.
[9]吴春颖,李爱芳,于明明.新型反应型活性橡胶沥青SHRP性能研究[J].石油沥青,2015,29(6):1-6.
[10]JTG F41-2008,公路沥青路面再生技术规范[S].
[11]耿磊.基于旧料再生的高模量沥青混合料研究[D].南京:东南大学,2013.
[12]JTG F40-2004,公路沥青路面施工技术规范[S].
[13]JTG E20-2011,公路工程沥青及沥青混合料试验规程[S].
[14]Mohammad L N,Cooper Jr S B,Elseifi M A.Characterization of HMA mixtures containing high reclaimed asphalt pavement content with crumb rubber additives[J].Journal of Materials in Civil Engineering,2011(11).
[15]Wu Z,Mohammad L,Mull M A.Characterization of fracture resistance of Superpave mixture using the semi-circular bending test[J].Journal of ASTM International(JAI),2005,2(3).
[16]Mohammad L N,Kim M,Elseifi M.Characterization of asphalt mixture’s fracture resistance using the semi-circular bending(SCB)test[C]//7th RILEM international conference on cracking in pavements.Springer Netherlands,2012:1-10.
[2]马涛,黄晓明,赵永利.SMA路面就地热再生关键技术[M].北京:科学出版社,2016.
[3]周洲.不同RAP料掺量热再生改性沥青混合料耐久性能研究[D].南京:东南大学,2015.
[4]甘新立,郑南翔,刘羽.不同再生方式的再生SBS改性沥青老化性能研究[J].公路工程,2014,39(05):47-49.
[5]王真.SBS改性沥青路面性能恢复技术研究[D].南京:东南大学,2012.
[6]马涛.SMA路面现场热再生技术研究[D].南京:东南大学,2009.
[7]孙祖望.橡胶沥青路面技术应用手册[M].北京:人民交通出版社,2014.
[8]董夏鑫,黄晓明,陈怡林.反应型橡胶改性沥青的微观改性机理分析[J].中外公路,2016,36(05):212-215.
[9]吴春颖,李爱芳,于明明.新型反应型活性橡胶沥青SHRP性能研究[J].石油沥青,2015,29(6):1-6.
[10]JTG F41-2008,公路沥青路面再生技术规范[S].
[11]耿磊.基于旧料再生的高模量沥青混合料研究[D].南京:东南大学,2013.
[12]JTG F40-2004,公路沥青路面施工技术规范[S].
[13]JTG E20-2011,公路工程沥青及沥青混合料试验规程[S].
[14]Mohammad L N,Cooper Jr S B,Elseifi M A.Characterization of HMA mixtures containing high reclaimed asphalt pavement content with crumb rubber additives[J].Journal of Materials in Civil Engineering,2011(11).
[15]Wu Z,Mohammad L,Mull M A.Characterization of fracture resistance of Superpave mixture using the semi-circular bending test[J].Journal of ASTM International(JAI),2005,2(3).
[16]Mohammad L N,Kim M,Elseifi M.Characterization of asphalt mixture’s fracture resistance using the semi-circular bending(SCB)test[C]//7th RILEM international conference on cracking in pavements.Springer Netherlands,2012:1-10.