沥青路面超薄罩面关键技术研究
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摘要
伴随我国高速公路的迅猛发展,很多沥青路面没有达到设计寿命就出现的诸多病害,严重影响车辆行驶质量。科学合理的预防性养护,既能有效提高路面的整体服务水平,又可以延长路面大、中修的到来,合理利用养护资金延长道路的使用寿命。大多数地方的高速、一级公路,都是通过罩面施工来恢复路面的使用功能。但是在技术上主要是采用AC(热拌密实型沥青混合料)来作为罩面材料。本研究提出一种最大公称粒径为7.1mm的STOC沥青混合料,这种细粒式的STOC混合料在我国的新规范中也未提及。这种小粒径的混合料可以大大降低路面加铺层的厚度,作为一种超薄罩面材料可以广泛的应用到预防性养护中。经过探索得出,STOC能设计出间断骨架密实结构,具有良好的高温稳定性能和低温抗裂性能。
本研究以甘肃省沥青路面养护超薄罩面关键技术为支撑,充分考虑当地自然、交通条件,对最大公称粒径7.1mm的细粒式STOC展开讨论,论文只要探讨集料、矿料级配、混合料的设计方法、超薄罩面的层间粘结和抗剪性能以及路用指标等。先介绍了国内外关于小粒径SMA的结构特性。其次提出了STOC型混合料的级配范围,STOC沥青混合料以2.36mm筛孔为粗、细集料的分界点,并提出这个关键筛孔的通过率范围为20%～35%。在使用传统马歇尔设计方法确定最佳油石比的基础上,又引入了力学指标SCB,有效避免了材料与结构设计的脱节。通过室内车辙试验、复合试件车辙试验、手工铺砂法测构造深度、渗水试验来检验STOC的路用性能。并通过查阅了大量文献资料,综合现有资料阐述了STOC型混合料的适用性以及可以作为预防性养护中的一种重要措施。
最后,论文还通过BISAR软件分析了超薄罩面层的层间剪应力,得出了层间连续接触的情况下最大剪应力较小,通过高温剪切试验优选层间粘结材料为LJT,LJT的综合性能比环氧沥青和SBS改性沥青更为优越,并通过拉拔试验验证了其抗拉强度。
Express way constructions are gaining momentum rapidly in recent years in China, which meanwhile gave rise to a specific phenomenon that ignoring quality for the purpose of achieving quantity. Many asphalt pavements generated road lots of disease harm long before arriving at designed life expectancy; those problems have bad effects on vehicles driving on. Scientific and reasonable preventive maintenance, not only could effectively enhance the pavement whole service level, but also postpone big and medium restorations, and make fully use of maintenance funds to prolong the road life expectancy. The major method used to restore pavement function in express ways and arterial road in most places is surface construction, but technologically mainly adopt AC as overlay materials. The essay research brings out a SMA asphalt mixture which has nominal maximum aggregate size of 7.1mm. This STOC mixture is not mentioned in China new code. This kind of micro-size particles mixture would greatly decrease road overlay thickness; it is an ultra-thin overlay materials which would extensively applied in preventive maintenance. Through researching, the essay concludes that STOC could design discontinuous skeleton dense texture, and have the properties of high-temperature stability and low temperature crack resistance.
The research took Gan Su province asphalt pavements maintenance ultra-thin overlay key technology as research facts support; fully considers the local nature, communication conditions, to discuss the 7.1mm nominal maximum aggregate size SMA mixture. The essay discussed following problems:aggregates, aggregate gradation, mixture design methods, ultra-thin overlay, interlayer bonding, shear behavior, and road indexes. I firstly introduce traditional foreign and domestic reference about micro-size particles SMA structure properties. Secondly the essay brings out gradation range of STOC mixture and that STOC asphalt mixture's coarse and fine gradation dividing point is 2.36mm screen aperture, meanwhile define this key screen aperture passing rate range is between 20% and 35%. The research is using traditional Marshall design methods so as to find the optimal asphalt-aggregate ration, then introduce into mechanical index(SCB) SCB, which effectively avoid disconnection between materials and structure design. Through indoor rutting experiment, compound specimen rutting experiment, manual sand spreading method of measuring structure deepness, and seepage test, the research aims to test STOC pavement performance.I looked up massive references, concluded STOC mixture applicability and that it could be an important method as preventive maintenance measures.
Finally, the essay analyzes ultra-thin overlay shear stress through BISAR software, comes to the conclusion:when interlayer is continuously contact, the maximum shear stress is less. Through high temperature shear test, pick LJT as the optimal interlayer bonding material. LJT's comprehensive performance is better than epoxy asphalt and SBS modified asphalt and its tensile strength was testified by pull-out test.
本研究以甘肃省沥青路面养护超薄罩面关键技术为支撑,充分考虑当地自然、交通条件,对最大公称粒径7.1mm的细粒式STOC展开讨论,论文只要探讨集料、矿料级配、混合料的设计方法、超薄罩面的层间粘结和抗剪性能以及路用指标等。先介绍了国内外关于小粒径SMA的结构特性。其次提出了STOC型混合料的级配范围,STOC沥青混合料以2.36mm筛孔为粗、细集料的分界点,并提出这个关键筛孔的通过率范围为20%～35%。在使用传统马歇尔设计方法确定最佳油石比的基础上,又引入了力学指标SCB,有效避免了材料与结构设计的脱节。通过室内车辙试验、复合试件车辙试验、手工铺砂法测构造深度、渗水试验来检验STOC的路用性能。并通过查阅了大量文献资料,综合现有资料阐述了STOC型混合料的适用性以及可以作为预防性养护中的一种重要措施。
最后,论文还通过BISAR软件分析了超薄罩面层的层间剪应力,得出了层间连续接触的情况下最大剪应力较小,通过高温剪切试验优选层间粘结材料为LJT,LJT的综合性能比环氧沥青和SBS改性沥青更为优越,并通过拉拔试验验证了其抗拉强度。
Express way constructions are gaining momentum rapidly in recent years in China, which meanwhile gave rise to a specific phenomenon that ignoring quality for the purpose of achieving quantity. Many asphalt pavements generated road lots of disease harm long before arriving at designed life expectancy; those problems have bad effects on vehicles driving on. Scientific and reasonable preventive maintenance, not only could effectively enhance the pavement whole service level, but also postpone big and medium restorations, and make fully use of maintenance funds to prolong the road life expectancy. The major method used to restore pavement function in express ways and arterial road in most places is surface construction, but technologically mainly adopt AC as overlay materials. The essay research brings out a SMA asphalt mixture which has nominal maximum aggregate size of 7.1mm. This STOC mixture is not mentioned in China new code. This kind of micro-size particles mixture would greatly decrease road overlay thickness; it is an ultra-thin overlay materials which would extensively applied in preventive maintenance. Through researching, the essay concludes that STOC could design discontinuous skeleton dense texture, and have the properties of high-temperature stability and low temperature crack resistance.
The research took Gan Su province asphalt pavements maintenance ultra-thin overlay key technology as research facts support; fully considers the local nature, communication conditions, to discuss the 7.1mm nominal maximum aggregate size SMA mixture. The essay discussed following problems:aggregates, aggregate gradation, mixture design methods, ultra-thin overlay, interlayer bonding, shear behavior, and road indexes. I firstly introduce traditional foreign and domestic reference about micro-size particles SMA structure properties. Secondly the essay brings out gradation range of STOC mixture and that STOC asphalt mixture's coarse and fine gradation dividing point is 2.36mm screen aperture, meanwhile define this key screen aperture passing rate range is between 20% and 35%. The research is using traditional Marshall design methods so as to find the optimal asphalt-aggregate ration, then introduce into mechanical index(SCB) SCB, which effectively avoid disconnection between materials and structure design. Through indoor rutting experiment, compound specimen rutting experiment, manual sand spreading method of measuring structure deepness, and seepage test, the research aims to test STOC pavement performance.I looked up massive references, concluded STOC mixture applicability and that it could be an important method as preventive maintenance measures.
Finally, the essay analyzes ultra-thin overlay shear stress through BISAR software, comes to the conclusion:when interlayer is continuously contact, the maximum shear stress is less. Through high temperature shear test, pick LJT as the optimal interlayer bonding material. LJT's comprehensive performance is better than epoxy asphalt and SBS modified asphalt and its tensile strength was testified by pull-out test.
引文
[1]沈金安.国外沥青路面设计方法总总汇[M].北京：人民交通出版社,2004.
[2]左秋英.LASTIKA超薄沥青罩面应用技术研究[D].长沙：长沙理工大学硕士学位论文,2007,1-2.
[3]Samuel B Cooper, Louay N Mohammad. NOVAC-HIPTM SURFACE TREAMENT Six Year Evaluation[R]. Louisiana Transportation Research Center Technical Assistance Report Number 04-2TA,2004.
[4]何春木,苏卫国.NovaChip技术试验路工程实践[J].公路,2007,(11)：85-89.
[5]John H Tension. Performace of NovaChip in New Mexico[R]. Rocky Mountain Asphalt Conference And Equipment Show,2003.
[6]路凯冀,宋世海,李小东.国内外NovaChip技术应用现状[J].中外公路,2006,(3)：94～97.
[7]SHC F40-01-2002,公路沥青玛蹄酯碎石路面技术指南[S].中国工程建设表准化协会公路工程委员会,2002.
[8]JTG F40-2004,公路沥青路面施工技术规范[S].北京：交通部公路科学研究所,2004.
[9]JrAllenCooleyL, JamesRobertS, Buchanan M Shane Development of mix design criteria for 4.75mm superpave mixes-final report [R]. Auburn:National Center for Asphlt Technololgy,2002.
[10]沈金安.美国的SMA配合比设计方法[J].国外公路,1998(5)：40-45.
[11]霍晓东.细粒式超薄SMA-5级配组成和路用性能研究[D].西安：长安大学硕士学位论文,2008.
[12]广东省提高路面质量对策研究
[13]范令.基于层位功能的沥青混合料设计方法研究[D].西安：长安大学硕士学位论文,2010.
[14]沙庆林.SAC和其他粗集料断级配的矿料级配设计方法[J].公路,2005(1)：143-150.
[15]曾蔚,李美江,王旭东.超薄沥青混凝土级配规律的研究[Z].北京：交通部公路科学研究院,2007.
[16]袁万杰.多级嵌挤密室级配设计方法与路用性能研究[D].西安：长安大学硕士学位论文,2004,47-49
[17]吴旷怀,张肖宁.超薄罩面层SMA-5沥青混合料的设计[J].华南理工大学学报(自然科学版),2006,34(4)：43-36.
[18]薛小刚.沥青混合料级配优化及配合比优化研究[D].西安：长安大学硕士学位论文,2005.
[19]虎东霞.嵌挤填充沥青混合料及其抗剪性能研究[D].西安：长安大学硕士学位论文,2008.
[20]刘忠根.SMA矿料级配及配合比优化设计研究[D].西安：长安大学博士学位论文,2002.
[21]AS-2, National Asphalt Specification[S].The Austalian Asphalt Pavement Association(AAPA),2004.
[22]Troutbeck R.Kennedy C.Reviewof the use of Stone Mastic Asphalt (SMA) surfacing by the Queensland Department of Main Roads[R].2005.
[23]张登良.沥青路面.人民交通出版社.1998.12.
[24]尹祖超,汪小茂,齐运华.路用环氧沥青抗剪试验及数值模拟[J].石油沥青,2010,(2).
[25]郑传超,王秉纲,夏永旭.道路结构力学计算.北京：人民交通出版社,2003.
[26]周鑫.薄层沥青加铺层间技术研究[D].西安：长安大学硕士学位论文,2006,10-11.
[27]曹志远.沥青混凝土薄罩面层技术研究与应用[D].长沙：长沙理工大学硕士学位论文2008.
[28]苏凯,山区公路沥青路面基面层间滑移分析[D].西安：西安公路交通大学硕士学位论文,2003.
[29]郑南翔,梁乃兴.张登良教授及其研究生论文集——聚珍求索[M].北京：人民交通出版社,2003.07.
[30]OliverR.Thin Bituminous Surfacings and Desirable Road User Performance. ARRB Research Report ARR325.AARB TransportResearch. Australia,1998.
[31]Cooley LA,Jr.Brown E.Potential of Using Stone Matrix Asphalt For Thin Overlays[S]. NCAT Report.
[32]Kandhal P, Lockett L.Construction and, Performace of Ulrathin Asphalt Friction Course[R]. National Center for Asphalt Technology Report No.97-5,1997.
[33]APRGUltra-thin Asphalt Surfacings. APRG Technical Notes 3 and 8.ARRB Transport Research. Australia.1994.
[34]杨斌.旧水泥混凝土路面沥青加铺层结构研究[D],西安：长安大学博士学位论文, 2005.
[35]姚祖康,路面(第三版)[M],人民交通出版社,1999.
[36]申爱琴.水泥与水泥混凝土[M].北京：人民交通出版社,2004.
[2]左秋英.LASTIKA超薄沥青罩面应用技术研究[D].长沙：长沙理工大学硕士学位论文,2007,1-2.
[3]Samuel B Cooper, Louay N Mohammad. NOVAC-HIPTM SURFACE TREAMENT Six Year Evaluation[R]. Louisiana Transportation Research Center Technical Assistance Report Number 04-2TA,2004.
[4]何春木,苏卫国.NovaChip技术试验路工程实践[J].公路,2007,(11)：85-89.
[5]John H Tension. Performace of NovaChip in New Mexico[R]. Rocky Mountain Asphalt Conference And Equipment Show,2003.
[6]路凯冀,宋世海,李小东.国内外NovaChip技术应用现状[J].中外公路,2006,(3)：94～97.
[7]SHC F40-01-2002,公路沥青玛蹄酯碎石路面技术指南[S].中国工程建设表准化协会公路工程委员会,2002.
[8]JTG F40-2004,公路沥青路面施工技术规范[S].北京：交通部公路科学研究所,2004.
[9]JrAllenCooleyL, JamesRobertS, Buchanan M Shane Development of mix design criteria for 4.75mm superpave mixes-final report [R]. Auburn:National Center for Asphlt Technololgy,2002.
[10]沈金安.美国的SMA配合比设计方法[J].国外公路,1998(5)：40-45.
[11]霍晓东.细粒式超薄SMA-5级配组成和路用性能研究[D].西安：长安大学硕士学位论文,2008.
[12]广东省提高路面质量对策研究
[13]范令.基于层位功能的沥青混合料设计方法研究[D].西安：长安大学硕士学位论文,2010.
[14]沙庆林.SAC和其他粗集料断级配的矿料级配设计方法[J].公路,2005(1)：143-150.
[15]曾蔚,李美江,王旭东.超薄沥青混凝土级配规律的研究[Z].北京：交通部公路科学研究院,2007.
[16]袁万杰.多级嵌挤密室级配设计方法与路用性能研究[D].西安：长安大学硕士学位论文,2004,47-49
[17]吴旷怀,张肖宁.超薄罩面层SMA-5沥青混合料的设计[J].华南理工大学学报(自然科学版),2006,34(4)：43-36.
[18]薛小刚.沥青混合料级配优化及配合比优化研究[D].西安：长安大学硕士学位论文,2005.
[19]虎东霞.嵌挤填充沥青混合料及其抗剪性能研究[D].西安：长安大学硕士学位论文,2008.
[20]刘忠根.SMA矿料级配及配合比优化设计研究[D].西安：长安大学博士学位论文,2002.
[21]AS-2, National Asphalt Specification[S].The Austalian Asphalt Pavement Association(AAPA),2004.
[22]Troutbeck R.Kennedy C.Reviewof the use of Stone Mastic Asphalt (SMA) surfacing by the Queensland Department of Main Roads[R].2005.
[23]张登良.沥青路面.人民交通出版社.1998.12.
[24]尹祖超,汪小茂,齐运华.路用环氧沥青抗剪试验及数值模拟[J].石油沥青,2010,(2).
[25]郑传超,王秉纲,夏永旭.道路结构力学计算.北京：人民交通出版社,2003.
[26]周鑫.薄层沥青加铺层间技术研究[D].西安：长安大学硕士学位论文,2006,10-11.
[27]曹志远.沥青混凝土薄罩面层技术研究与应用[D].长沙：长沙理工大学硕士学位论文2008.
[28]苏凯,山区公路沥青路面基面层间滑移分析[D].西安：西安公路交通大学硕士学位论文,2003.
[29]郑南翔,梁乃兴.张登良教授及其研究生论文集——聚珍求索[M].北京：人民交通出版社,2003.07.
[30]OliverR.Thin Bituminous Surfacings and Desirable Road User Performance. ARRB Research Report ARR325.AARB TransportResearch. Australia,1998.
[31]Cooley LA,Jr.Brown E.Potential of Using Stone Matrix Asphalt For Thin Overlays[S]. NCAT Report.
[32]Kandhal P, Lockett L.Construction and, Performace of Ulrathin Asphalt Friction Course[R]. National Center for Asphalt Technology Report No.97-5,1997.
[33]APRGUltra-thin Asphalt Surfacings. APRG Technical Notes 3 and 8.ARRB Transport Research. Australia.1994.
[34]杨斌.旧水泥混凝土路面沥青加铺层结构研究[D],西安：长安大学博士学位论文, 2005.
[35]姚祖康,路面(第三版)[M],人民交通出版社,1999.
[36]申爱琴.水泥与水泥混凝土[M].北京：人民交通出版社,2004.