TAF-10环氧沥青混合料动态弹性模量及路用性能试验研究
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摘要
近些年来,环氧沥青混合料以其耐久性好、强度高、冲击韧性优越等特点,广泛地应用于大型桥梁桥面铺装之中。以TAF-10型环氧沥青混合料为研究对象,对其进行不同温度与频率下的动态模量试验,结合时温等效原理,通过Origin数学计算软件,采用西格摩德(Sigmoidal)模型对试验结果进行非线性拟合;并通过高温车辙试验、小梁弯曲试验及冻融劈裂试验,对其高温稳定性、低温抗裂性、水稳定性等路用性能进行检测。结果表明:随着加载频率的增大,TAF-10环氧沥青混合料的动态模量不断增大,而随试验温度的升高其值不断减小;拟合所得到的主曲线方程,可以对任何给定温度与加载频率下该种混合料的动态模量进行有效预估; TAF-10环氧沥青混合料的高温稳定性、低温抗裂性及水稳定性等性能均超出规范要求,满足桥面铺装要求。研究成果可以为TAF-10环氧沥青混合料桥面铺装的动态设计提供参考。
In recent years,epoxy asphalt mixture has been widely used in large bridge deck pavement due to its good durability,high strength and excellent impact toughness. This paper chose TAF-10 epoxy asphalt mixture as the research object and conducted the dynamic elastic modulus test at different temperatures and frequencies. Combined with the time-temperature equivalence principle,the Sigmoidal model was applied to nonlinear fitting of the dynamic modulus test results of epoxy asphalt mixture by Origin software. Through high temperature rutting test,bending test of trabeculae and freeze-thaw splitting test, road performance of epoxy asphalt mixture such as high temperature stability, low temperature cracking resistance and water stability were tested. The results show that the dynamic modulus of TAF-10 epoxy asphalt mixture increases with the loading frequency,and decreases with the increase of test temperature; master curve equation obtained by fitting can effectively predict the dynamic modulus of the mixture at any given temperature and loading frequency; water stability,high temperature stability,low temperature crack resistance of TAF-10 epoxy asphalt mixture are all beyond the standard requirements,and meet the requirements of bridge deck pavement. The research results can provide reference for the dynamic design of TAF-10 epoxy asphalt mixture on bridge deck pavement.
In recent years,epoxy asphalt mixture has been widely used in large bridge deck pavement due to its good durability,high strength and excellent impact toughness. This paper chose TAF-10 epoxy asphalt mixture as the research object and conducted the dynamic elastic modulus test at different temperatures and frequencies. Combined with the time-temperature equivalence principle,the Sigmoidal model was applied to nonlinear fitting of the dynamic modulus test results of epoxy asphalt mixture by Origin software. Through high temperature rutting test,bending test of trabeculae and freeze-thaw splitting test, road performance of epoxy asphalt mixture such as high temperature stability, low temperature cracking resistance and water stability were tested. The results show that the dynamic modulus of TAF-10 epoxy asphalt mixture increases with the loading frequency,and decreases with the increase of test temperature; master curve equation obtained by fitting can effectively predict the dynamic modulus of the mixture at any given temperature and loading frequency; water stability,high temperature stability,low temperature crack resistance of TAF-10 epoxy asphalt mixture are all beyond the standard requirements,and meet the requirements of bridge deck pavement. The research results can provide reference for the dynamic design of TAF-10 epoxy asphalt mixture on bridge deck pavement.
引文
[1]李萍,念腾飞,张雅莉,等.基于斜剪试验的水泥砼桥面沥青铺装层抗剪切性能研究[J].武汉理工大学学报,2015,37(11):48-53.
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[11]陈磊磊,钱振东.基于简单性能试验的环氧沥青混合料动态模量研究[J].建筑材料学报,2013,16(2):341-344.
[12]罗桑,钱振东,Harvey J.环氧沥青混合料动态模量及其主曲线研究[J].中国公路学报,2010(6):16-20.
[13]黄明.环氧沥青混合料的疲劳行为研究[J].重庆交通大学学报:自然科学版,2016,35(2):46-50.
[14]冉武平,孔二春.环氧沥青混合料动态模量时温特性[J].中外公路,2015(12):282-285.
[15]陈明星,赵凯.环氧沥青混合料路用性能研究[J].山西交通科技,2013(6):22-29.
[16] Wang W Q,He H Y. Study on performance of epoxy asphalt concrete applied in the deck pavement of pingsheng steel bridge[J]. Advanced Materials Research,2011:150-151.
[17] Wang T,Lin J T,Pang L,et al. Study on the viscoelastic performance of asphalt mixture based on dynamic modulus[J]. Advanced Materials Research,2013:753-755.
[18] Liu H Q,Luo R. Development of master curve models complying with linear viscoelastic theory for complex moduli of asphalt mixtures with improved accuracy[J]. Construction and Building Materials,2017,152:259-268.
[2] Chen F,Ma R,Sheng X J. Study and application on cold blended epoxy asphalt mixture for steel bridge deck pavement[J]. Key Engineering Materials,2017,744:190-195.
[3] Lv Q,Huang M,Huang W D. A conception of application epoxy asphalt mixture on airport pavement[J]. Advanced Materials Research,2014(838-841):1240-1244.
[4]钱振东,陈磊磊,尹祖超.国产环氧沥青混合料抗剪性能试验研究[J].建筑材料学报,2011,14(2):282-286.
[5]晏永,郭大进,封基良,等.钢桥铺装用环氧沥青的研究现状及展望[J].公路交通科技,2016,33(9):69-77.
[6]徐志荣,常艳婷,陈忠达,等.沥青混合料动态模量试验标准研究[J].交通运输工程学报,2015,15(3):1-8.
[7]王昊鹏,杨军,施晓强,等.高模量沥青混合料动态模量及其主曲线研究[J].公路交通科技,2015,32(8):12-17.
[8] Seyed A F,Fereidoon M N,Ali K. A comparative study of temperature shifting techniques for construction of relaxation modulus master curve of asphalt mixes[J]. Construction and Building Materials,2014,53:74-82.
[9] Luo S,Wang J W,Qian Z D. Research on the performance of locally developed epoxy asphalt mixes[C]. Proceedings of the 26th Southern African Transport Conference. Pretoria:SATC,2007:736-744.
[10]李萍,念腾飞,魏定邦,等. FTIR定量分析方法与老化沥青流变参数新探[J].华中科技大学学报(自然科学版),2018,46(2):34-39.
[11]陈磊磊,钱振东.基于简单性能试验的环氧沥青混合料动态模量研究[J].建筑材料学报,2013,16(2):341-344.
[12]罗桑,钱振东,Harvey J.环氧沥青混合料动态模量及其主曲线研究[J].中国公路学报,2010(6):16-20.
[13]黄明.环氧沥青混合料的疲劳行为研究[J].重庆交通大学学报:自然科学版,2016,35(2):46-50.
[14]冉武平,孔二春.环氧沥青混合料动态模量时温特性[J].中外公路,2015(12):282-285.
[15]陈明星,赵凯.环氧沥青混合料路用性能研究[J].山西交通科技,2013(6):22-29.
[16] Wang W Q,He H Y. Study on performance of epoxy asphalt concrete applied in the deck pavement of pingsheng steel bridge[J]. Advanced Materials Research,2011:150-151.
[17] Wang T,Lin J T,Pang L,et al. Study on the viscoelastic performance of asphalt mixture based on dynamic modulus[J]. Advanced Materials Research,2013:753-755.
[18] Liu H Q,Luo R. Development of master curve models complying with linear viscoelastic theory for complex moduli of asphalt mixtures with improved accuracy[J]. Construction and Building Materials,2017,152:259-268.