煤矸石粉沥青胶浆路用性能及微观机理研究
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摘要
为了拓宽煤矸石加工再利用的途径,探究其在道路工程中的应用前景,采用5种粉胶比制备了分别掺入煤矸石粉(CWP)、煤矸石灰(CWA)和石灰岩(LS)3种填料的沥青胶浆,对其路用性能进行了对比研究,并对煤矸石粉沥青胶浆的微观机理进行了分析.结果表明:与矿粉相比,煤矸石粉尤其是煤矸石灰颗粒更细,比表面积更大,表面更粗糙,并且含有更多的活性矿物成分和孔隙结构,提高了与沥青的黏结力;煤矸石粉和煤矸石灰的孔隙吸收了沥青中的轻质组分,使胶质和沥青质的相对含量增大,从而显著提高了沥青胶浆的高温稳定性能,并改善了感温性,但其低温性能有所降低.
To broaden the way of utilizing coal waste, explore its application prospect in road engineering, coal waste powder(CWP), coal waste ash(CWA) and limestone(LS) powder were used to prepare asphalt mortar with 5 kinds of filler-asphalt ratio. Technical performance tests were conducted to compare the road performance of different asphalt mortar. Furthermore, microscopic tests were conducted to analyse the microcosmic action mechanisms of coal waste powder asphalt mortar. The results show that compared with limestone powder, CWP and especially CWA particles are finer, the surface is rougher and the specific surface area is larger, and which contain more activemineral contents and poring structure, thereby the adhesion of filler-asphalt is improved. In addition, the pores of CWP and CWA can absorb light components in asphalt, which resulting the relative contents of colloid and asphaltene in asphalt increase, thus apparently improving the high temperature property and temperature sensitivity of asphalt mortar, but the low-temperature performance of asphalt mortar is slightly reduced.
To broaden the way of utilizing coal waste, explore its application prospect in road engineering, coal waste powder(CWP), coal waste ash(CWA) and limestone(LS) powder were used to prepare asphalt mortar with 5 kinds of filler-asphalt ratio. Technical performance tests were conducted to compare the road performance of different asphalt mortar. Furthermore, microscopic tests were conducted to analyse the microcosmic action mechanisms of coal waste powder asphalt mortar. The results show that compared with limestone powder, CWP and especially CWA particles are finer, the surface is rougher and the specific surface area is larger, and which contain more activemineral contents and poring structure, thereby the adhesion of filler-asphalt is improved. In addition, the pores of CWP and CWA can absorb light components in asphalt, which resulting the relative contents of colloid and asphaltene in asphalt increase, thus apparently improving the high temperature property and temperature sensitivity of asphalt mortar, but the low-temperature performance of asphalt mortar is slightly reduced.
引文
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[13] 熊锐,杨晓凯,杨发,等.活化煤矸石改性沥青胶浆粉胶比确定及粘温特性研究[J].材料导报,2017,31(1):121-125.XIONG Rui,YANG Xiaokai,YANG Fa,et al.Research on filler-bitumen ratio and viscosity-temperature property of activated coal gangue modified asphalt mortar[J].Materials Review,2017,31(1):121-125.(in Chinese)
[14] 冯新军,赵梦龙,李猛.煤矸石粉与传统填料沥青混凝土力学性能和环境影响的对比研究[J].中外公路,2017,37(5):251-256.FENG Xinjun,ZHAO Menglong,LI Meng.Effect of coal waste powder in hot mix asphalt compared to conventional fillers:mix mechanical properties and environmental impacts[J].Journal of China and Foreign Highway,2017,37(5):251-256.(in Chinese)
[15] 徐欧明,韩森,李洪军.紫外线对沥青特征官能团和玻璃化温度的影响[J].长安大学学报(自然科学版),2007,27(2):16-20.XU Ouming,HAN Sen,LI Hongjun.Impact of ultraviolet radiation on changes of typical functional groups and vitrification on temperature for asphalt[J].Journal of Chang'an University(Natural Science),2007,27(2):16-20.(in Chinese)
[2] 许超,康鑫.煤矸石危害及其综合利用[J].环境科技,2010,23:102-104.XU Chao,KANG Xin.Harm and comprehensive utilization of coal gangue[J].Environmental Science and Technology,2010,23:102-104.(in Chinese)
[3] 李伟,程培峰,李国栋.煤矸石沥青混合料路用性能的试验[J].东北林业大学学报,2009,37(6):54-58.LI Wei,CHENG Peifeng,LI Guodong.Experiment on road performance of asphalt mixture of coal gangue[J].Journal of Northeast Forestry University,2009,37(6):54-58.(in Chinese)
[4] 敖清文,江洲.煤矸石活化及在水泥稳定碎石基层中的使用研究[J].中外公路,2016,36(4):331-334.AO Qingwen,JIANG Zhou.Study on activation of coal gangue and its application in cement stabilized macadam base[J].Journal of China and Foreign Highway,2016,36(4):331-334.(in Chinese)
[5] 张映雪,雷强,罗润洲,等.掺入煤矸石及煤矸石灰的再生沥青混合料性能分析研究[J].中外公路,2016,36(3):278-280.ZHANG Yingxue,LEI Qiang,LUO Runzhou,et al.Performance analysis of recycled asphalt mixture with coal gangue and coal gangue limes[J].Journal of China and Foreign Highway,2016,36(3):278-280.(in Chinese)
[6] 熊锐,杨晓凯,杨发,等.活化煤矸石改性沥青胶浆高温性能影响因素研究[J].重庆交通大学学报(自然科学版),2015,34(5):44-48.XIONG Rui,YANG Xiaokai,YANG Fa,et al.Influence factors of high temperature performance of activated coal gangue modified asphalt binder[J].Journal of Chongqing Jiaotong University(Natural Science),2015,34(5):44-48.(in Chinese)
[7] 杨晓凯,熊锐,范天奇等.活化煤矸石改性沥青胶浆流变性能实验研究[J].材料导报,2015,29(6):135-139.YANG Xiaokai,XIONG Rui,FAN Tianqi,et al.Laboratory investigation upon the rheological property of activated coal gangue-modified asphalt binder[J].Materials Review,2015,29(6):135-139.(in Chinese)
[8] 程文静.掺活化煤矸石SMA混合料路用性能及改性机理研究[J].公路工程.2016,41(3):232-237.CHENG Wenjing.Study on activated coal gangue modified SMA mixture road performance and modification mechanism[J].Highway Engineering,2016,41(3):232-237.(in Chinese)
[9] AMIR M,MORTEZA R.Application of coal waste powder as filler in hot mix asphalt[J].Construction and Building Materials,2014,66:476-483.
[10] AMIR M,MORTEZA R,POOYAN A.Effect of coal waste powder in hot mix asphalt compared to conventional fillers:mix mechanical properties and environmental impacts[J].Journal of Cleaner Production,2014,11(78):1-7.
[11] 刘丽.沥青胶浆技术性能及评价方法研究[D].西安:长安大学,2004.LIU Li.Study on technical performance and evaluation method of asphalt mortar[D].Xi'an:Chang'an University,2004.(in Chinese)
[12] 周燕,张凯,陈拴发,等.改性沥青测力延度试验[J].长安大学学报(自然科学版),2012,32(3):30-39.ZHOU Yan,ZHANG Kai,CHEN Shuanfa,et al.Research on force ductility test of modifild asphalt[J].Journal of Chang'an University(Natural Science),2012,32(3):30-9.(in Chinese)
[13] 熊锐,杨晓凯,杨发,等.活化煤矸石改性沥青胶浆粉胶比确定及粘温特性研究[J].材料导报,2017,31(1):121-125.XIONG Rui,YANG Xiaokai,YANG Fa,et al.Research on filler-bitumen ratio and viscosity-temperature property of activated coal gangue modified asphalt mortar[J].Materials Review,2017,31(1):121-125.(in Chinese)
[14] 冯新军,赵梦龙,李猛.煤矸石粉与传统填料沥青混凝土力学性能和环境影响的对比研究[J].中外公路,2017,37(5):251-256.FENG Xinjun,ZHAO Menglong,LI Meng.Effect of coal waste powder in hot mix asphalt compared to conventional fillers:mix mechanical properties and environmental impacts[J].Journal of China and Foreign Highway,2017,37(5):251-256.(in Chinese)
[15] 徐欧明,韩森,李洪军.紫外线对沥青特征官能团和玻璃化温度的影响[J].长安大学学报(自然科学版),2007,27(2):16-20.XU Ouming,HAN Sen,LI Hongjun.Impact of ultraviolet radiation on changes of typical functional groups and vitrification on temperature for asphalt[J].Journal of Chang'an University(Natural Science),2007,27(2):16-20.(in Chinese)