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为了研究水泥在乳化沥青就地冷再生混合料中的作用机理,评价了不同水泥和乳化沥青含量的就地冷再生混合料路用性能,包括水稳定性、强度性能和高温稳定性。同时,根据扫描电镜测试(SEM)分析了水泥冷再生混合料、乳化沥青冷再生混合料和乳化沥青-水泥冷再生混合料的胶浆表面微观形貌。研究结果表明,水泥的加入从整体上有效地提高了再生混合料的水稳定性、强度性能和高温稳定性。SEM分析表明水泥水化物和沥青形成的胶浆复合物形成的空间立体网格结构在乳化沥青冷再生混合料中具有"加筋"作用,水泥有效地提高了乳化沥青冷再生混合料的路用性能。
Abstract：In order to study the mechanism of cement to the cold in-place recycling mixture of asphalt emulsion,its performances including the moisture stability,mechanical performance and high temperature stability were evaluated according to the different cement and asphalt emulsion contents.Additionally,the surface micro-profiles of the three mastic classes were observed using Scan Electron Microscopy(SEM).The mastics included cement mastic,asphalt emulsion mastic and cement-asphalt emulsion mastic.The results indicated that the addition of cement can improve the recycled mixture's moisture susceptibility,mechanical performance and high temperature stability.SEM analysis showed that composite mastics consisting of cement hydration products and asphalt film formed a spatial structural network which has fiber-reinforcement effect in asphalt emulsion recycled mixture,and the addition of cement improved the properties of cold in-place recycling mixtures of asphalt emulsion.
[1]Murphy D.T.,Emery J.J.Modified cold in-place asphalt recycling[J].Transportation Research Record,Washington,D.C.,1996,1545:143-150.
[2]Epps J.A.Cold recycled bituminous concrete using bituminous materials,NCHRP Synthesis of Highway Practice160[J].Transportation Research Record,Washington D.C.,1990.
[3]周谦,李荫国,田佳超.就地冷再生技术在营大线柔性基层上的应用[J].石油沥青,2007,21(2):37-38.
[4]Brayton T.E.,Lee K.W.,Harington J.,Kearney E.J.Characterization of cold in-place recycling asphalt mixtures[J].Construction and Materials Issues,2001:193-205.
[5]Lee K.W.,Brayton T.E.,Harrington J.New mix-design of cold in-place for pavement rehabilitation[R].Transportation Research Board,Washington D.C.,2003.
[6]Sebaaly P.E.,Bazi G.,Hitti E.,Weitzel D.,BemanianS.Performance of Cold In Place Recycling in Nevada[J].Transportation Research Record,Washington D.C.,2004:162-169.
[7]Pouliot N.,Marchand J.,Pigeon M.Hydration mechanisms,microstructure,and mechanical properties of mortars prepared with mixed binder cement slurry-asphalt emulsion[J].Journal of Materials in Civil Engineering,2003,15(1):54-58.
[8]Sadd M.H.,Dai Q-L,Parameswaran V.,Shukla A.Microstructural simulation of asphalt materials:modeling and experimental verification[R].15th ASCE Engineering Mechanics Conference,New York,2002.
[9]Forsberg A.,Lukanen E.,Thomas T.Blue earth county CSAH20-an engineered cold in-place recycling project[R].Transportation Research Board Record,Washington D.C.,2002.
[10]Federal Highway Administration.Pavement recycling guidelines for state and local governments[R].FHWA-SA-98-042,1997.
[11]JTJ F41-2008.沥青路面再生技术规范[S].北京:人民交通出版社,2008.
[12]美国沥青再生协会.美国沥青再生指南[M].深圳海川工程科技有限公司译.北京:人民交通出版社,2006.
[13]Stephen A.Cross.Determination of NDESIGN for CIR mixtures using the Superpave gyratory compactor[R].RMRC research project No.15(final report),2002.
[14]谭忆秋,董泽蛟,曹丽萍等.应用Superpave体积设计法设计冷再生沥青混合料[J].公路交通科技,2005,22(3):31-32.
[15][英]悉尼.明德斯,[美]J.弗朗西斯.扬著.混凝土[M].方秋清等译.北京:中国建筑工业出版社,1989.
[16][美]P.梅泰著.混凝土的结构、性能与材料[M].祝永年等译.上海:同济大学出版社,1991.
[17]沙爱民,王振军.水泥乳化沥青混凝土胶浆-集料界面微观结构[J].长安大学学报(自然科学版),2008,28(4):1-4.
基本信息:
中图分类号:U414
引用信息:
[1]严金海,倪富健,陶卓辉,等.水泥对乳化沥青就地冷再生混合料的作用机理研究[J],2009,7(04):38-44+62.
基金信息:
江苏省交通科技项目(07Y28)