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1、第42卷第12期哈爾濱工業(yè)大學(xué)學(xué)報(bào)Vol.42No.122010年12月JOURNALOFHARBININSTITUTEOFTECHNOLOGYDec.2010再生混凝土粘結(jié)性能試驗(yàn)研究121胡瓊,陳偉偉,鄒超英(1.哈爾濱工業(yè)大學(xué)土木工程學(xué)院,哈爾濱150080;2.溫州市建筑設(shè)計(jì)研究院,溫州325000,chenweiwei@live.com)摘要:為進(jìn)一步在實(shí)際工程中推廣應(yīng)用再生混凝土,通過再生混凝土拔出試驗(yàn),研究再生粗骨料、細(xì)骨料取代率,水灰比及錨固條件對(duì)再生混凝土抗壓強(qiáng)度、粘結(jié)性能的影響.結(jié)果表明:再生混凝土的粘結(jié)強(qiáng)度隨再生粗
2、骨料取代率增加而增加,在粗骨料取代率約為60%時(shí)取得最大值,隨后降低;再生混凝土的粘結(jié)強(qiáng)度隨再生細(xì)骨料取代率增加而降低;再生混凝土的粘結(jié)強(qiáng)度優(yōu)于普通混凝土;過多摻入再生粗、細(xì)骨料會(huì)降低再生混凝土抗壓強(qiáng)度;降低水灰比可提高再生混凝土抗壓強(qiáng)度及粘結(jié)強(qiáng)度,水灰比變化對(duì)再生混凝土抗壓強(qiáng)度的影響較普通混凝土小;適當(dāng)增加保護(hù)層厚度(≤3d)及錨固長度可以提高再生混凝土粘結(jié)強(qiáng)度.關(guān)鍵詞:再生混凝土;粘結(jié)性能;再生骨料取代率;保護(hù)層厚度;錨固長度中圖分類號(hào):TU502文獻(xiàn)標(biāo)志碼:A文章編號(hào):0367-6234(2010)12-1849-06Experi
3、mentalstudyonbondingpropertiesofrecycledconcrete121HUQiong,CHENWei-wei,ZOUChao-ying(1.SchoolofCivilEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.WenzhouArchitectureDesign&ResearchInstitute,Wenzhou325000,China,chenweiwei@live.com)Abstract:Topromotetheuseofr
4、ecycledconcreteinpracticalengineering,pull-outtestswerecarriedouttostudytheinfluenceofCoarse/FineRecycledConcreteAggregate(CRCA/FRCA)replacementrate,water-cementratioandtheanchoringconditionsonthecompressivestrengthandbondingpropertiesofRecycledAg-gregateConcrete(RAC).Th
5、eresultsshowthat:thebondstrengthofRACriseswiththeincreasingofCRCAreplacementrate,andarrivesatthemaximumwhentherate=60%,thenreduces;thebondstrengthofRACreduceswhiletheFRCAreplacementrateincreases,anditisbetterthanthatofordinaryconcrete;toomuchCRCA/FRCAreplacementwillreduc
6、ethecompressivestrengthofRAC;lowerwater-cementratiocanim-provethecompressivestrengthandbondstrengthofRAC,andwater-cementratiovariationhaslessinfluenceonRACthanthatofordinaryconcrete;appropriateincreaseinthethicknessofconcretecover(≤3d)andtheanchoragelengthcanincreasetheb
7、ondstrengthofRAC.Inaddition,byconcerningtherelationshipbe-tweenthebondstrengthofRACandCRCA/FRCAreplacementrate,water-cementratio,compressivestrength,anchoragelength,aformulawasestablished.Keywords:recycledconcrete;bondingproperty;recycledaggregatereplacementratio;concret
8、ecoverthick-ness;anchoragedevelopmentlength[1-3]隨著國民經(jīng)濟(jì)的高速發(fā)展,一方面大量土木筑垃圾得不到有效處理,造成環(huán)境污染.將廢工程的興建導(dǎo)致天然砂石過度開采,