水泥混凝土桥面水泥基防水黏结层材料性能评价
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摘要
为了使水泥混凝土桥面水泥基防水黏结层兼具优异的防水性能和黏结性能,开发了一种新型水泥基防水黏结层材料,选用3种传统沥青基材料(SBS改性沥青、橡胶沥青、水性环氧树脂改性乳化沥青)与其进行性能对比.通过剪切试验确定了水泥混凝土桥面板的最佳处理方式以及水泥基防水黏结层材料的最佳凝结时间.利用斜剪和拉拔试验分别评价了不同温度、浸水和冻融循环等因素对水泥基和沥青基防水黏结层材料强度的影响规律.试验结果表明:水泥混凝土桥面板宜采用拉毛处理,水泥基防水黏结层材料的最佳凝结时间为0. 5 h;随着温度的升高,水泥基和沥青基防水黏结层材料的剪切和拉拔强度均呈线性下降,但水泥基防水黏结层材料的剪切和拉拔强度下降幅度明显低于3种沥青基材料,在70℃高温条件下,3种沥青基材料的剪切和拉拔强度接近0 MPa,而水泥基材料的剪切和拉拔强度仍能分别达1. 37、0. 36 MPa,说明水泥基防水黏结层材料的耐高温性能优异;浸水和冻融循环对水泥基防水黏结层材料的剪切和拉拔强度的影响远小于其对沥青基材料的影响,这主要得益于水泥基防水黏结材料在有水条件下持续的水化反应.
To develop and evaluate performances of a new cement-based waterproof adhesive layer in cement concrete bridge deck,three traditional types of asphalt-based materials( SBS modified asphalt,rubber modified asphalt,and water-based epoxy resin modified emulsified asphalt) were compared. The best treat method of cement concrete bridge deck and the optimal setting time of cement-based material were determined by shear tests. The influences of different temperatures,water immersions and freezethaw cycles on strength of cement-based and asphalt-based materials were evaluated by using shear and pullout test respectively. The test results show that cement concrete bridge deck should be roughed and the best setting time of cement-based material is 0. 5 h. With increasing temperature,the shear and pullout strength of cement-based and asphalt-based materials linearly declines; however the shear and pullout strengths of cement-based material are significantly lower than that of asphalt-based materials. The shear and pullout strengths of the three asphalt-based materials are close to 0 MPa at 70 ℃; however the shear and pullout strength of cement-based material can reach 1. 37 MPa and 0. 36 MPa,which indicates that the cement-based material has excellent high-temperature performance. The effect of water immersion and freeze-thaw cycle on the shear and pullout strength of cement-based material is much less than that of asphalt-based material,due to its continuous hydration reaction under water condition.
To develop and evaluate performances of a new cement-based waterproof adhesive layer in cement concrete bridge deck,three traditional types of asphalt-based materials( SBS modified asphalt,rubber modified asphalt,and water-based epoxy resin modified emulsified asphalt) were compared. The best treat method of cement concrete bridge deck and the optimal setting time of cement-based material were determined by shear tests. The influences of different temperatures,water immersions and freezethaw cycles on strength of cement-based and asphalt-based materials were evaluated by using shear and pullout test respectively. The test results show that cement concrete bridge deck should be roughed and the best setting time of cement-based material is 0. 5 h. With increasing temperature,the shear and pullout strength of cement-based and asphalt-based materials linearly declines; however the shear and pullout strengths of cement-based material are significantly lower than that of asphalt-based materials. The shear and pullout strengths of the three asphalt-based materials are close to 0 MPa at 70 ℃; however the shear and pullout strength of cement-based material can reach 1. 37 MPa and 0. 36 MPa,which indicates that the cement-based material has excellent high-temperature performance. The effect of water immersion and freeze-thaw cycle on the shear and pullout strength of cement-based material is much less than that of asphalt-based material,due to its continuous hydration reaction under water condition.
引文
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[15]李萍,念腾飞,张雅莉,等.基于剪切试验的水泥混凝土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.LI P,NIAN T F,ZHANG Y L,et al.Study on shear resistance of cement concrete bridge deck asphalt pavement based on shear test[J].Journal of Wuhan University of Technology,2015,37(11):48-53.(in Chinese)
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[2]黄晓明.水泥混凝土桥面沥青铺装层技术研究现状综述[J].交通运输工程学报,2014,14(1):1-10.HUANG X M.Review of research status of asphalt pavement on cement concrete bridge deck[J].Journal of Traffic and Transportation Engineering,2014,14(1):1-10.(in Chinese)
[3]马涛,黄晓明,居浩.桥面防水粘结材料性能研究[J].公路交通科技,2007,24(1):43-46.MA T,HUANG X M,JU H.Research on performance of bridge surface waterproof adhesive materials[J].Journal of Highway and Transportation Research and Development,2007,24(1):43-46.(in Chinese)
[4]杨育生,李振霞,王选仓,等.桥面铺装同步碎石防水粘结层的路用性能[J].长安大学学报(自然科学版),2009,29(6):19-23.YANG Y S,LI Z X,WANG X C,et al.Road performance of bridge deck paving synchronous gravel waterproof bonding layer[J].Journal of Chang'an University(Natural Science Edition),2009,29(6):19-23.(in Chinese)
[5]顾兴宇,王文达.水泥混凝土桥面粘结层抗剪性能要求及简化计算[J].交通运输工程学报,2010,10(2):20-25.GU X Y,WANG W D.Shear performance requirements and simplified calculation of cement concrete bridge deck bonding layer[J].Journal of Traffic and Transportation Engineering,2010,10(2):20-25.(in Chinese)
[6]刘黎萍,彭一川,邵静.混凝土桥面铺装黏结防水层材料关键性能研究[J].建筑材料学报,2010,13(1):48-51.LIU L P,PENG Y C,SHAO J.Research on key properties of bonded waterproof layer materials for concrete bridge deck pavement[J].Journal of Building Materials,2010,13(1):48-51.(in Chinese)
[7]张娟.水泥混凝土桥面防水粘结层剪切性能研究[J].公路交通科技,2011,28(10):29-34.ZHANG J.Research on shear properties of waterproof adhesive layer of cement concrete bridge deck[J].Journal of Highway and Transportation Research and Development,2011,28(10):29-34.(in Chinese)
[8]YE F,ZHOU K,JIA X Y,et al.Evaluation of shear performance of flexible waterproof-adhesive layer in concrete bridge pavement based on grey correlation analysis[J].Road Materials&Pavement Design,2009,10(Suppl1):349-360.
[9]LIU Y,WU J,CHEN J.Mechanical properties of a waterproofing adhesive layer used on concrete bridges under heavy traffic and temperature loading[J].International Journal of Adhesion&Adhesives,2014,48(1):102-109.
[10]XU Q,ZHOU Q,MEDINA C,et al.Experimental and numerical analysis of a waterproofing adhesive layer used on concrete-bridge decks[J].International Journal of Adhesion&Adhesives,2009,29(5):525-534.
[11]MAZZOTTA F,LANTIERI C,VIGNALI V,et al.Performance evaluation of recycled rubber waterproofing bituminous membranes for concrete bridge decks and other surfaces[J].Construction&Building Materials,2017,136:524-532.
[12]汪洁,周彬,陈拴发,等.国产环氧沥青桥面防水黏结材料路用性能研究[J].公路,2012(7):35-38.WANG J,ZHOU B,CHEN S F,et al.Study on road performance of domestic epoxy asphalt bridge deck waterproof adhesive materials[J].Highway,2012(7):35-38.(in Chinese)
[13]李正中,宋晓燕,肖庆一,等.橡胶沥青防水粘结层层间抗剪性能试验分析[J].武汉理工大学学报(交通科学与工程版),2012,36(6):1212-1216.LI Z Z,SONG X Y,XIAO Q Y,et al.Experimental analysis of interlaminar shear resistance of rubber asphalt waterproofing layer[J].Journal of Wuhan University of Technology(Transportation Science&Engineering),2012,36(6):1212-1216.(in Chinese)
[14]钱国平,刘佩,刘迪中.桥面铺装粘结层剪切性能试验[J].长沙理工大学学报(自然科学版),2015,12(4):7-10.QIAN G P,LIU P,LIU D Z.Shear performance test of bridge deck pavement layer[J].Journal of Changsha University of Science and Technology(Natural Science),2015,12(4):7-10.(in Chinese)
[15]李萍,念腾飞,张雅莉,等.基于剪切试验的水泥混凝土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.LI P,NIAN T F,ZHANG Y L,et al.Study on shear resistance of cement concrete bridge deck asphalt pavement based on shear test[J].Journal of Wuhan University of Technology,2015,37(11):48-53.(in Chinese)
[16]交通部公路科学研究院.公路工程沥青及沥青混合料试验规程(JTG E20-2011)[S].北京:人民交通出版社,2011.