钢渣沥青混合料体积参数测定与水稳定性影响机理
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摘要
通过浸渍试验测定了不同粒径钢渣集料的有效相对密度,提出了钢渣沥青混合料体积参数的确定方法,采用残留稳定度、冻融劈裂强度比与沥青膜厚度对不同钢渣掺量的沥青混合料水稳定性进行评价,借助X射线荧光光谱分析、扫描电镜试验和压汞试验,从钢渣化学组成与微观结构方面分析了钢渣对沥青混合料水稳定性的影响机理。分析结果表明:对于钢渣等吸水性较大集料,采用浸渍试验实测的有效相对密度较计算法得到的有效相对密度增大了1.5%,更接近集料的实际有效相对密度,因此,采用浸渍试验确定的钢渣沥青混合料体积参数更加合理;随着钢渣掺量增大,钢渣沥青混合料水稳定性逐渐提升,当钢渣掺量为70%时,钢渣沥青混合料的残留稳定度提高了12%,冻融劈裂强度比提高了13%;钢渣沥青混合料沥青膜厚度随钢渣掺量增大而增大,当钢渣掺量为70%时,沥青混合料的沥青膜厚度增大了13%,较厚的沥青膜可有效防止水分入侵,并增大集料表面"结构沥青"含量,从而提高钢渣沥青混合料的水稳定性;钢渣沥青混合料沥青膜厚度计算值为6~7μm,由于其水稳定性与沥青膜厚度正相关,故推荐基于水稳定性的钢渣沥青混合料的沥青膜厚度为7μm;钢渣呈超碱性,表面多孔隙,孔隙内部结构复杂,增大了钢渣集料与沥青间有效接触面积,并形成较好的机械咬合力,提高了钢渣集料与沥青之间的黏结性,可显著改善沥青混合料的水稳定性。
The effective relative densities of steel slag aggregates with different sizes were tested by immersion test,and the determining method of volumetric parameters for steel slag asphalt mixture was proposed.The water stabilities of asphalt mixtures with different steel slag contents were comprehensively evaluated by residual stability,freezing-thawing splitting intensity ratio and asphalt film thickness.X ray fluorescence spectrometry,scanning electron microscope,and mercury injection test were used to analyze the influencing mechanism of steel slag on the water stability of asphalt mixture based on the chemical compositions and microstructure of steel slag.Analysis result shows that for large water imbibition aggregates such as steel slag,the effective relative density measured by immersion test is 1.5% higher than the value obtained by the calculation method,and is closer to the actual density,therefore,it is more reasonable to useimmersion test to determine the volumetric parameters of steel slag asphalt mixture.The water stability of steel slag asphalt mixture improves with the increase of steel slag content.The residual stability increases by 12% and the freezing-thawing splitting intensity ratio increases by13% when the steel slag content is 70%.The asphalt film thickness of steel slag asphalt mixture gradually increases with the increase of steel slag content.When the content of steel slag is 70%,the asphalt film thickness increases by 13%.The thicker asphalt film can effectively prevent water intrusion and increase the content of structural asphalt on aggregate surface,so the water stability of steel slag asphalt mixture increases.The calculation value of asphalt film thickness of steel slag asphalt mixture is 6-7μm,and the water stability of steel slag asphalt mixture is positively related to the thickness of asphalt film,so the recommended value of asphalt film thickness is 7μm based on the water stability of steel slag asphalt mixture.The steel slag is super alkaline and porous,meanwhile,the internal structures of pores are complex,therefore,the effective contact area between steel slag aggregate and asphalt increases,the good mechanical occlusal force forms,and the adhesion increases,so that the water stability of asphalt mixture improves significantly.9 tabs,14 figs,26 refs.
The effective relative densities of steel slag aggregates with different sizes were tested by immersion test,and the determining method of volumetric parameters for steel slag asphalt mixture was proposed.The water stabilities of asphalt mixtures with different steel slag contents were comprehensively evaluated by residual stability,freezing-thawing splitting intensity ratio and asphalt film thickness.X ray fluorescence spectrometry,scanning electron microscope,and mercury injection test were used to analyze the influencing mechanism of steel slag on the water stability of asphalt mixture based on the chemical compositions and microstructure of steel slag.Analysis result shows that for large water imbibition aggregates such as steel slag,the effective relative density measured by immersion test is 1.5% higher than the value obtained by the calculation method,and is closer to the actual density,therefore,it is more reasonable to useimmersion test to determine the volumetric parameters of steel slag asphalt mixture.The water stability of steel slag asphalt mixture improves with the increase of steel slag content.The residual stability increases by 12% and the freezing-thawing splitting intensity ratio increases by13% when the steel slag content is 70%.The asphalt film thickness of steel slag asphalt mixture gradually increases with the increase of steel slag content.When the content of steel slag is 70%,the asphalt film thickness increases by 13%.The thicker asphalt film can effectively prevent water intrusion and increase the content of structural asphalt on aggregate surface,so the water stability of steel slag asphalt mixture increases.The calculation value of asphalt film thickness of steel slag asphalt mixture is 6-7μm,and the water stability of steel slag asphalt mixture is positively related to the thickness of asphalt film,so the recommended value of asphalt film thickness is 7μm based on the water stability of steel slag asphalt mixture.The steel slag is super alkaline and porous,meanwhile,the internal structures of pores are complex,therefore,the effective contact area between steel slag aggregate and asphalt increases,the good mechanical occlusal force forms,and the adhesion increases,so that the water stability of asphalt mixture improves significantly.9 tabs,14 figs,26 refs.
引文
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[17]余志凯,黄刚,胥吉.沥青膜厚度对混合料水稳定性的影响[J].北方交通,2010(7):17-19.YU Zhi-kai,HUANG Gang,XU Ji.Effect of asphalt film thickness on the moisture sensitivity of asphalt mixture[J].Northern Communications,2010(7):17-19.(in Chinese)
[18]刘寒冰,吕得保.沥青混合料沥青膜厚度的确定[J].吉林大学学报:工学版,2011,41(增2):153-158.LIU Han-bing,LU De-bao.Determination of the asphalt film thickness of asphalt mixture[J].Journal of Jilin University:Engineering and Technology Edition,2011,41(S2):153-158.(in Chinese)
[19]郭乃胜,尤占平,谭忆秋,等.考虑均匀性的沥青混合料最佳沥青用量确定方法[J].交通运输工程学报,2017,17(1):1-10.GUO Nai-sheng,YOU Zhan-ping,TAN Yi-qiu,et al.Determination method of optimum asphalt content in asphalt mixture under considering homogeneity[J].Journal of Traffic and Transportation Engineering,2017,17(1):1-10.(in Chinese)
[20]HAN Fang-hui,ZHANG Zeng-qi,WANG Dong-min,et al.Hydration heat evolution and kinetics of blended cement containing steel slag at different temperatures[J].Thermochimica Acta,2015,605:43-51.
[21]刘迪,邓敏,林长农,等.钢渣微观结构及性能分析[J].混凝土,2014(12):88-90,94.LIU Di,DENG Min,LIN Chang-nong,et al.Microstructures and properties of steel slag[J].Concrete,2014(12):88-90,94.(in Chinese)
[22]ZHANG Nan,HE Man-chao,ZHANG Bo,et al.Pore structure characteristics and permeability of deep sedimentary rocks determined by mercury intrusion porosimetry[J].Journal of Earth Science,2016,27(4):670-676.
[23]唐华瑞,韩灵杰,王杏杏,等.基于压汞实验的粘土微孔隙分布特征研究[J].广西大学学报:自然科学版,2016,41(1):228-233.TANG Hua-rui,HAN Ling-jie,WANG Xing-xing,et al.Study on distribution of clay void based on mercury penetration test[J].Journal of Guangxi University:Natural Science Edition,2016,41(1):228-233.(in Chinese)
[24]邹明清.分形理论的若干应用[D].武汉:华中科技大学,2007.ZOU Ming-qing.Fracal theory and its applications to porous media,rough surface and thermal contact conductance[D].Wuhan:Huazhong University of Science and Technology,2007.(in Chinese)
[25]武建民,郑平安,冀永安.橡胶颗粒沥青混合料级配分形与动稳定度的关系[J].长安大学学报:自然科学版,2015,35(1):8-13.WU Jian-min,ZHENG Ping-an,JI Yong-an.Correlational analysis of graded fractal dimension of rubber particle asphalt mixture and its dynamic stability[J].Journal of Changan University:Natural Science Edition,2015,35(1):8-13.(in Chinese)
[26]童申家,谢祥兵,赵大勇.沥青路面纹理分布的分形描述及抗滑性能评价[J].中国公路学报,2016,29(2):1-7.TONG Shen-jia,XIE Xiang-bing,ZHAO Da-yong.Fractal description of texture distribution and evaluation of skidresistance performance for asphalt pavement[J].China Journal of Highway and Transport,2016,29(2),1-7.(in Chinese)
[2]赵计辉,阎培渝.钢渣的体积安定性问题及稳定化处理的国内研究进展[J].硅酸盐通报,2017,36(2):477-484.ZHAO Ji-hui,YAN Pei-yu.Volume stability and stabilization treatment of steel slag in China[J].Bulletin of the Chinese Ceramic Society,2017,36(2):477-484.(in Chinese)
[3]GAO Jie,SHA Ai-min,WANG Zhen-jun,et al.Utilization of steel slag as aggregate in asphalt mixtures for microwave deicing[J].Journal of Cleaner Production,2017,152:429-442.
[4]PASETTO M,BALDO N.Mix design and performance analysis of asphalt concretes with electric arc furnace slag[J].Construction and Building Materials,2011,25(8):3458-3468.
[5]MAGADI K L,ANIRUDH N,MALLESH K M.Evaluation of bituminous concrete mixture properties with steel slag[J].Transportation Research Procedia,2016,17:174-183.
[6]李灿华,向晓东,周溪滢.钢渣开级配透水沥青混合料及性能研究[J].建筑材料学报,2015,18(1):168-171.LI Can-hua,XIANG Xiao-dong,ZHOU Xi-ying.Investigation of performance of porous open graded steel slag asphalt mixture[J].Journal of Building Materials,2015,18(1):168-171.(in Chinese)
[7]牛哲.钢渣沥青混合料的制备与性能研究[D].南京:东南大学,2016.NIU Zhe.Research on preparation and performance of steel slag asphalt pavement[D].Nanjing:Southeast University,2016.(in Chinese)
[8]谢君.钢渣沥青混凝土的制备、性能与应用研究[D].武汉:武汉理工大学,2013.XIE Jun.Research on the preparation,performance and application of basic oxygen slag based asphalt concrete[D].Wuhan:Wuhan University of Technology,2013.(in Chinese)
[9]王雅婷.钢渣集料在沥青路面超薄抗滑磨耗层中的应用研究[D].重庆:重庆交通大学,2013.WANG Ya-ting.Study on application of steel slag aggregate in ultra-thin against sliding wear layer[D].Chongqing:Chongqing Jiaotong University,2013.(in Chinese)
[10]阮文.石灰粉煤灰稳定钢渣碎石材料的路用性能研究[D].长沙:湖南大学,2012.RUAN Wen.A study on road performance of lime-fly-ash stabilized steel-slag-crushed-stone material[D].Changsha:Hunan University,2012.(in Chinese)
[11]HESAMI S,AMERI M,GOLI H,et al.Laboratory investigation of moisture susceptibility of warm-mix asphalt mixtures containing steel slag aggregates[J].International Journal of Pavement Engineering,2015,16(8):745-759.
[12]CHEN Jian-shiuh,WEI Shi-hsiu.Engineering properties and performance of asphalt mixtures incorporating steel slag[J].Construction and Building Materials,2016,128:148-153.
[13]CHEN Zong-wu,WU Shao-peng,WEN Jin,et al.Utilization of gneiss coarse aggregate and steel slag fine aggregate in asphalt mixture[J].Construction and Building Materials,2015,93:911-918.
[14]庹峻玮.钢渣碎石沥青混合料路用性能研究[D].重庆:重庆交通大学,2012.TUO Jun-wei.Study on pavement performance of steel slag and gravel asphalt mixture[D].Chongqing:Chongqing Jiaotong University,2012.(in Chinese)
[15]SENGOZ B,AGAR E.Effect of asphalt film thickness on the moisture sensitivity characteristics of hot-mix asphalt[J].Building and Environment,2007,42(10):3621-3628.
[16]LI Xin-jun,WILLIAMS C R,MARASTEANU M O,et al.Investigation of in-place asphalt film thickness and performance of hot-mix asphalt mixtures[J].Journal of Materials in Civil Engineering,2009,21(6):262-270.
[17]余志凯,黄刚,胥吉.沥青膜厚度对混合料水稳定性的影响[J].北方交通,2010(7):17-19.YU Zhi-kai,HUANG Gang,XU Ji.Effect of asphalt film thickness on the moisture sensitivity of asphalt mixture[J].Northern Communications,2010(7):17-19.(in Chinese)
[18]刘寒冰,吕得保.沥青混合料沥青膜厚度的确定[J].吉林大学学报:工学版,2011,41(增2):153-158.LIU Han-bing,LU De-bao.Determination of the asphalt film thickness of asphalt mixture[J].Journal of Jilin University:Engineering and Technology Edition,2011,41(S2):153-158.(in Chinese)
[19]郭乃胜,尤占平,谭忆秋,等.考虑均匀性的沥青混合料最佳沥青用量确定方法[J].交通运输工程学报,2017,17(1):1-10.GUO Nai-sheng,YOU Zhan-ping,TAN Yi-qiu,et al.Determination method of optimum asphalt content in asphalt mixture under considering homogeneity[J].Journal of Traffic and Transportation Engineering,2017,17(1):1-10.(in Chinese)
[20]HAN Fang-hui,ZHANG Zeng-qi,WANG Dong-min,et al.Hydration heat evolution and kinetics of blended cement containing steel slag at different temperatures[J].Thermochimica Acta,2015,605:43-51.
[21]刘迪,邓敏,林长农,等.钢渣微观结构及性能分析[J].混凝土,2014(12):88-90,94.LIU Di,DENG Min,LIN Chang-nong,et al.Microstructures and properties of steel slag[J].Concrete,2014(12):88-90,94.(in Chinese)
[22]ZHANG Nan,HE Man-chao,ZHANG Bo,et al.Pore structure characteristics and permeability of deep sedimentary rocks determined by mercury intrusion porosimetry[J].Journal of Earth Science,2016,27(4):670-676.
[23]唐华瑞,韩灵杰,王杏杏,等.基于压汞实验的粘土微孔隙分布特征研究[J].广西大学学报:自然科学版,2016,41(1):228-233.TANG Hua-rui,HAN Ling-jie,WANG Xing-xing,et al.Study on distribution of clay void based on mercury penetration test[J].Journal of Guangxi University:Natural Science Edition,2016,41(1):228-233.(in Chinese)
[24]邹明清.分形理论的若干应用[D].武汉:华中科技大学,2007.ZOU Ming-qing.Fracal theory and its applications to porous media,rough surface and thermal contact conductance[D].Wuhan:Huazhong University of Science and Technology,2007.(in Chinese)
[25]武建民,郑平安,冀永安.橡胶颗粒沥青混合料级配分形与动稳定度的关系[J].长安大学学报:自然科学版,2015,35(1):8-13.WU Jian-min,ZHENG Ping-an,JI Yong-an.Correlational analysis of graded fractal dimension of rubber particle asphalt mixture and its dynamic stability[J].Journal of Changan University:Natural Science Edition,2015,35(1):8-13.(in Chinese)
[26]童申家,谢祥兵,赵大勇.沥青路面纹理分布的分形描述及抗滑性能评价[J].中国公路学报,2016,29(2):1-7.TONG Shen-jia,XIE Xiang-bing,ZHAO Da-yong.Fractal description of texture distribution and evaluation of skidresistance performance for asphalt pavement[J].China Journal of Highway and Transport,2016,29(2),1-7.(in Chinese)