高掺量粉煤灰混凝土路面应用性能的试验研究

:2005-12-16:(1978-),,,.E2mail:[e-mail]1,2,2(1.,200092;2.,110004):,,,.13,30%7%1%,,.:;;;;;:TU416.222:A:02532374X(2007)01-0050-06ExperimentalStudyonApplicationofHighContentFlyAshConcretetoRoadPavementCAOChangwei1,ZHANGWenxian2,WANGYanfei2(1.KeyLaboratoryofRoadandTrafficEngineeringoftheMinistryofEducation,TongjiUniversity,Shanghai200092;2.SchoolofResourcesandCivilEngineering,NortheasternUniversity,Shenyang110004,China)Abstract:Torevealtheperformanceofhighcontentflyashconcreteandaccelerateitsapplicationtotheroadpavement,theperformanceoftheconcreteaddedbyflyash,silicafumeandtheadmixturesofair2inducerandwater2reducerisstudiedfromtheperspectiveofthemechanicsbehavior,durability,dry2shrinkageandabrasionresistance.Basedonacontrastivestudyoftheperformanceof13mixpro2portionsconcrete,thehighcontentflyashconcretewiththeproportionof30%flyash,7%silicafumeand1%admixtureofair2inducerandwater2reducerisrecommandedforroadpavementduetoitshighflexuralandcompressivestrength,highfrostresistanceandabrasionresistanceaswellasitslowperme2ability,dryingshrinkageandcost.Keywords:flyash;concretepavement;mechanicsbehavior;durability;dryingshrinkage,abrasionresistance,,,(30%)[1],,,35120071()JOURNALOFTONGJIUNIVERSITY(NATURALSCIENCE)Vol.35No.1Jan.2007.[2,3]:,,,,.,,,,,,..,,,,,,,,.11.1,1.1.24%(5%),(GBl59691).,2.SiO286.99%,(GB288191)86%90%.1Tab.1Componentofflyash%w(SiO2)w(Al2O3)w(Fe2O3)w(CaO)w(MgO)w(SO3)w(K2O)w(Na2O)/(m2kg-1)55.0128.508.052.392.190.791.711.361031.245402Tab.2Componentofsilicafume%w(SiO2)w(Al2O3)w(Fe2O3)w(CaO)w(MgO)w(SO3)86.993.201.600.521.411.373.69LJ165.42.5R.,2.9,,()0.8%,(JGJ521992).,530mm,4.7%(10%),0.89%(1%),(JGJ531992)..1.2[4].()25%35%,5%,,1.2.()6%,7%8%,,1%.13,3.1.3:3,150mm150mm550mm;3,100mm100mm400mm;6,175mm185mm150mm;3,150mm150mm70mm.(205)1d,,((203),90%)28d..(JTGE302005).151,:3Tab.3Laboratorymixproportions/mm/kg/%/%00.432338054013300001650010.37222855211330114233.9915025620.37222855211330114273.9915025730.37222855211330114303.9915025840.37222665171330137234.0315130650.37222665171330137274.0315130760.37232665171330137304.0315130870.37232475131330160234.0715235680.37232475131330160274.0715235790.37242475131330160304.07152358100.37242285101330182234.10153406110.37242285101330182274.10153407120.37242285101330182304.1015340822.1,.28d4.12,,;34,,,,,.4Tab.4Resultsofflexuralstrength,compressivestrength,permeabilityandabrasionresistance/%/%/%/MPa/MPa/MPa/(kgm-2)00006.2844.94.2410.894125617.1951.35.3520.869225717.3851.65.6550.872325817.6252.25.7560.876430616.4744.65.2510.871530716.8445.25.4530.877630817.1345.85.5540.887735616.1542.15.0490.896835716.3042.45.2510.908935816.3942.65.3520.9131040616.1239.94.8470.9201140716.1740.84.9480.9281240816.2041.65.0490.93313,1%LJ165,25%30%,6%8%,(30%6%,);35%7%8%,,.40%,.,,CSH,,,.SiO2Al2O3Ca(OH)2,,25()35,,.,,Ca(OH)2,CSH,,,,().1Fig.1Flexuralstrengthvs.flyashpercentage2Fig.2Compressivestrengthvs.flyashpercentage3Fig.3Flexuralstrengthvs.silicafumepercentage4Fig.4Compressivestrengthvs.silicafumepercentage2.2,45.S=10p-1:S;p,MPa.5,1%LJ165,25%40%6%8%,,,,..,;CSH,,,,;,,,.,.,.,.5Fig.5Permeabilityperformancevs.flyashpercentage2.3,,(-172)(62),34h.,.,7%.25,50,75100,6.351,:6Fig.6Weightlosspercentagevs.freeze2thawcycles6,,25%30%,,.,,,,,.2.47%1%.3,7,14,28,60d,57.7,14d,21d,.,(25%35%),.60d,35%30%,,.5Tab.5Concretedryingshrinkage/%/10-63d7d14d28d60d1011020132039044022590180250330380330801502202803504357513520025033077%1%Fig.7Dryingshrinkageof7%silicafumeand1%air2inducer2.5,8.8:(3.6kgm-2);,,,.,,,,25%30%.30%35%,;35%,,;,,.8Fig.8Concreteabrasionresistance2.69.181.1,25%8%,.8,(4,7,1013),;(2,34),.,25%30%6%8%1%,,,.,,30%6%,.1%30%7%,172.4,4.8%.:151kg,266kg,517kg,1330kg,137kg,27kg4.0345()35kg.1;213,41129Fig.9Comparisonofconcreteprices3(1),25%35%,(35%6%);25%30%,(30%6%),.(2),;,(6%8%).(3).1%LG16525%40%6%8%,.(4)25%30%,.(5),25%35%,.(6),25%30%,,,,,.(7),:151kg,266kg,517kg,1330kg,137kg,27kg,4.03kg;6.84MPa(5.0MPa),45.2MPa(40MPa),;6.28MPa44.9MPa;,1000.107%,0.267%;,53,41;(60d350%)(60d440%),;(0.877)(0.894),(3.6);4.8%.,.(8),,,,.:[1].[J].,1994(1):25.SUNQingping.Theperformanceofhighcontentflyashconcrete[J].Concrete,1994(1):25.[2]RangarajuP.Investigatingtheprematuredeteriorationofacon2cretehighway[C/CD]81stAnnualMeetingofTRB.WashingtonDC:NationalResearchCouncil,2002.[3]OzyildirimC.HPCbridgedecksinvirginia[J].ConcreteInterna2tional,1999,21(2):59.[4],,.[J].,2005,21(6):21.CAOChangwei,LINGJianming,ZHANGWenxian.Theinflu2enceandapplicationstudyofactiveadmixturestotheperformanceofcementconcretepavement[J].BuildingScience,2005,21(6):21.(:)551,: