废混凝土再生粗集料性能试验与分级标准研究
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摘要
首先对中国香港及国外再生粗集料的分级建议进行了对比分析,并对不同来源(如地震灾区)再生粗集料进行了试验,分析了再生粗集料表面附着的砂浆对再生粗集料性能的影响,得出了再生粗集料表面附着的砂浆含量与再生粗集料的吸水率和饱和面干状态下的表观密度之间的关系,并分析了再生粗集料性能对再生混凝土的影响,指出了再生粗集料砖含量也是影响再生混凝土性能的主要因素之一。最后提出了中国废混凝土再生粗集料分级的建议标准。
Standards for the classification of recycled coarse aggregates(RCA) in Hong Kong and other foreign countries are firstly introduced in this paper.Then based on the test and analysis of RCAs derived from different resources(such as earthguake-hit area),the influence of the adhered mortar on the properties of RCAs is discussed particularly.The relationship between the density under saturated surface-dry(SSD) condition and water absorption of RAC and the content of mortar adhered to RCAs is put forward.The influence of properties of recycled coarse aggregate on the recycled aggregate concrete(RAC) is discussed.The content of bricks is one of important factors affecting properties of RAC is also indicated.Finally,the suggestions for the classification standard of RCAs derived from waste concrete in China are proposed.
Standards for the classification of recycled coarse aggregates(RCA) in Hong Kong and other foreign countries are firstly introduced in this paper.Then based on the test and analysis of RCAs derived from different resources(such as earthguake-hit area),the influence of the adhered mortar on the properties of RCAs is discussed particularly.The relationship between the density under saturated surface-dry(SSD) condition and water absorption of RAC and the content of mortar adhered to RCAs is put forward.The influence of properties of recycled coarse aggregate on the recycled aggregate concrete(RAC) is discussed.The content of bricks is one of important factors affecting properties of RAC is also indicated.Finally,the suggestions for the classification standard of RCAs derived from waste concrete in China are proposed.
引文
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[17]Poon C S,Dixon Chan.Feasible use of recycled concreteaggregates and crushed clay brick as unbound road sub-base[J].Construction and Building Materials,2005,19(10):578-585.
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[19]Wang Jian,Li Yi.Research on treatment and regenerationof building refuses[J].Environmental Engineering,2003,21(6):49-52.[王健,李懿.建筑垃圾的处理及再生利用研究[J].环境工程,2003,21(6):49-52.]
[20]Peng HS,Chen H J,Yen T.Strength and workability ofrecycled aggregate concrete[C]//The International Confer-ence on Composites in Constructions(CCC2003).Italy.2003.
[2]Li Jiabin,Xiao Jianzhuang,Sun Zhenping.Properties of re-cycled coarse aggregate and its Influence on recycled con-crete[J].Journal of Building Materials,2004,7(4):390-395.[李佳彬,肖建庄,孙振平.再生粗骨料特性及其对再生混凝土性能的影响[J].建筑材料学报,2004,7(4):390-395.]
[3]Works Bureau Technical Circular 12/2002,Specificationsfacilitating the use of recycled aggregates[R].Hong KongSAR Government.
[4]Hendriks C F,Pieterson H S.Sustainable raw materials-construction and demolition waste[R].RILEM Report 22,RILEM Publication Series,F-94235 Cachan Cedex,France,1998.
[5]Tomosawa F.The recycling of concrete-the Japanese experi-ence[C]//Proceedings of the 4thCanmet/ACI/JCI Interna-tional Conference on Recent Advances in Concrete Technolo-gy.Tokushima,Japan,1998:221-237.
[6]British Standard Institution.BS6543-Guide to the use of in-dustrial By-products and waste materials in Building andCivil Engineering[S].BSI,London,1985.
[7]Task force of the standing committee of concrete of spain.Draft of Spanish regulations for the use of recycled aggregatein the production of structural concrete[S].2003.
[8]German Committee for Reinforced concrete(DAFSTB)-CODE:Concrete with recycled aggregates[S].1998.
[9]CSIRO,Building,construction and Engineering.Guide forspecification of recycled concrete aggregate(RCA)for con-crete production[S].1998.
[10]Vyncke J,Rousseau E.Recycling of construction anddemolition waste in Belgium:actual situation and future evo-lution[R].Belgian Building Research institute.Brussels,Belgium.
[11]M RCIO J.Estefano de Oliveira,C SSIA Silveira de As-sis,JU RCIO Tavares de Mattos.Recycled aggregatestandardization in Brazil[R].http://congress.cimne.upc.es/rilem04/admin/Files/FilePaper/p310.pdf.
[12]Xiao Jianzhuang,Xie He,Wang Changqing,et al.Statisti-cal analysis on building waste in Wenchuan Earthquakr-hitarea[J].Journal of Sichuan University:Engineering ScienceEdtiton,2009,41(3):188-194.[肖建庄,谢贺,王长青,等.汶川地震灾区建筑废物统计分析[J].四川大学学报:工程科学版,2009,41(3):188-194.]
[13]Marta S J,Pilar A G.Influence of attached mortar contenton the properties of recycled concrete aggregate[C]//Pro-ceedings of the International Conference on SustainableWaste Management and Recycling:Construction and Demo-lition waste.2004.
[14]Hansen T C.Recycled aggregate and recycled aggregateconcrete.Second state of art report,development from 1945-1985.RILEM Technical Committee 37 DRC[J].Mate-rial and Structures,1986,19(5):201-246.
[15]Li Jiabin.Study on mechanical behavior of recycled aggre-gate concret[D].Shanghai:Tongji University,2004.[李佳彬.再生混凝土基本力学性能研究[D].上海:同济大学,2004.]
[16]M櫣ller Ch,Wiens U.Bewertung der bei der aufbereitungvon bauschutt anfallenden recyclingzuschlage hinsichtlichder eignung als betonzuschlag[C]//Baustoffkreislauf imMassivbau(BiM).Statusseminar,1998.
[17]Poon C S,Dixon Chan.Feasible use of recycled concreteaggregates and crushed clay brick as unbound road sub-base[J].Construction and Building Materials,2005,19(10):578-585.
[18]Lian Xiaoming,Zhang Hui.Experimental study on light-weight broken brick concrete[J].Shanxi Architecure,2005,31(3):101-102.[连晓明,张辉.碎砖轻混凝土的试验研究[J].山西建筑,2005,31(3):101-102.]
[19]Wang Jian,Li Yi.Research on treatment and regenerationof building refuses[J].Environmental Engineering,2003,21(6):49-52.[王健,李懿.建筑垃圾的处理及再生利用研究[J].环境工程,2003,21(6):49-52.]
[20]Peng HS,Chen H J,Yen T.Strength and workability ofrecycled aggregate concrete[C]//The International Confer-ence on Composites in Constructions(CCC2003).Italy.2003.
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