运用DMA方法研究基质沥青组成对SBS改性沥青黏弹性能的影响
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摘要
选取4种组成不同的基质沥青制备SBS改性沥青,运用动态力学分析(DMA)方法分析改性沥青黏弹性能。结果表明,采用温度扫描、频率扫描和稳态流动试验得到的改性沥青高温性能具有一致性,基质沥青中芳香分含量是影响改性沥青黏弹性能的主要因素,芳香分含量越高,制备的改性沥青高温黏弹性能越好,饱和分含量过高,会减弱改性沥青内聚力,降低高温黏性。低温弯曲梁流变试验结果表明,胶质和沥青质主要影响改性沥青低温性能,基质沥青沥青质含量越高,改性沥青低温延伸性能越差。
SBS modified asphalts were prepared by using four kinds of matrix asphalts with different components,and the viscoelastic properties of the modified asphalts were analyzed by dynamic mechanical analysis(DMA).The results showed that the high temperature properties of modified asphalts obtained by temperature scanning,frequency scanning and steady flow test are consistent.The aromatic content of matrix asphalts is the main factor influencing the viscoelastic properties of modified asphalts.The viscoelastic performance of modified asphalts gets better with the rise of aromatic content,while the content of high saturated component would weaken the cohesion of modified asphalts,reducing the high-temperature viscosity.The bending beam rheometer tests showed that the resin and asphaltene mainly affect the low-temperature performance of the modified asphalts.The low-temperature extensibility of modified asphalts becomes poor when asphaltene content is too high.
SBS modified asphalts were prepared by using four kinds of matrix asphalts with different components,and the viscoelastic properties of the modified asphalts were analyzed by dynamic mechanical analysis(DMA).The results showed that the high temperature properties of modified asphalts obtained by temperature scanning,frequency scanning and steady flow test are consistent.The aromatic content of matrix asphalts is the main factor influencing the viscoelastic properties of modified asphalts.The viscoelastic performance of modified asphalts gets better with the rise of aromatic content,while the content of high saturated component would weaken the cohesion of modified asphalts,reducing the high-temperature viscosity.The bending beam rheometer tests showed that the resin and asphaltene mainly affect the low-temperature performance of the modified asphalts.The low-temperature extensibility of modified asphalts becomes poor when asphaltene content is too high.
引文
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[2]詹小丽.基于DMA方法对沥青黏弹性能的研究[D].哈尔滨:哈尔滨工业大学,2007
[3]何立平.基于DMA方法的橡胶沥青黏弹特性和高温性能研究[D].西安:长安大学,2014
[4]谭华,胡松山,刘斌清,等.基于流变学的复合改性橡胶沥青黏弹特性研究[J].土木工程学报,2017,50(1):115-122
[5]王威,马德崇,樊长昕,等.不同沥青流变性能分析与路用性能比较[J].公路,2016(11):189-194
[6]Bayarmaa Bold.沥青零剪切黏度试验方法及计算模型研究[D].大连:大连理工大学,2016
[7]曾诗雅,曹正,朱宗凯.基于多应力蠕变恢复试验的改性沥青高温性能研究[J].公路工程,2014,39(1):246-268
[8]唐乃膨,黄卫东.基于MSCR试验的SBS改性沥青高温性能评价与分级[J].建筑材料学报,2016,19(4):665-671
[9]王晓倩,陆江银,曹敏娜.废橡胶改性沥青的储存稳定性研究[J].石油炼制与化工,2014,45(4):27-30
[10]单越,李玉环,赵磊.沥青的组成特点及其改性沥青的性能研究[J].石油沥青,2015,29(5):52-56
[11]刘斌清,胡松山,谭华,等.沥青四组分与橡胶沥青性能指标的相关性分析[J].中外公路,2015,35(6),321-326