改善混凝土抗擾動(dòng)性能的三種途徑

1、1t岔幣1刪2011年2月‘Llr，J，rr十】D‘JOURNALOFBUILDINGMATERIALSVU11lU1Feb，2011文章編號(hào)：1007—9629(2011)01—002604改善混凝土抗擾動(dòng)性能的三種途徑張永娟，張悅?cè)?，張?1同濟(jì)大學(xué)材料科學(xué)與工程學(xué)院，上海201804；2同濟(jì)大學(xué)先進(jìn)土木工程材料教育部重點(diǎn)實(shí)驗(yàn)室，上海201804；3中交上海三航科研院，上海200032)摘要：通過(guò)縮短混凝土受擾期、減少表面裂縫和提高

2、自愈合率來(lái)提高混凝土的抗擾動(dòng)性能結(jié)果表明：貫入阻力為35～280MPa時(shí)，混凝土受擾后的強(qiáng)度大幅降低，這時(shí)采用調(diào)凝型功能外加劑來(lái)縮短混凝土受擾期可取得良好效果；抗裂增韌外加劑對(duì)混凝土表面裂縫有一定的控制作用；摻入適量膨脹劑可顯著改善混凝土的自愈合率關(guān)鍵詞：受擾期；混凝土表面裂縫；自愈合率中圖分類號(hào)：TU52801文獻(xiàn)標(biāo)志碼：Adoi：103969／jissn1007—9629201101006ThreeTechniquestoImpro

3、veDisturbanceResistanceofConcreteZHANGYongjuan～，ZHANGYue—r口，，u，ZHANGXiong，。(1SchoolofMaterialsScienceandEngineering，TongjiUniversity，Shanghai201804，China；2KeyLaboratoryofAdvancedCivilEngineeringMaterialsofMinistryofEduca

4、tion，TongjiUniversity，Shanghai201804，China3ShanghaiThirdHarbourEngineeringScience&TechnologyResearchInstituteCoTD，Shanghai200032。China)Abstract：CurrentlytherehasbeencrowdtrafficinChinaAlotofbridgesneedstoberepairedinthec

5、on—ditionwithoutinterruptingthetraffic，SOtheresearchonthedisturbanceresistanceofconcretehasgreateconomicalsignificanceandapplicationvalueThreetechniqueswereusedtoimprovethedisturbancere—sistanceofconcretewhichareabletosh

6、ortenthedisturbanceperiodoftheconcretebyconstruction，SOthatconcretesurfacecrackscanbereducedandconcreterateofself—healingcanbeincreasedTheresultshowsthatwhenthepenetrationresistanceoftheconcreteisintherangeof35280MPa，the

7、concrete’Sstrengthwillbereducedgreatlyafterdisturbance，SObyusingfunctionalconcreteacceleratorthedisturb—anceperiodcanbeshortenedeffectivelyAnti—crackandtougheningadmixturecanbeusedtocontrolcracksonthesurface；self—healing

8、ratereferstothecapacitytestoreorenhancetheperformanceofcon—creteafterdisturbancebyreducingtheinternalmicro—crackscausedbydisturbanceinthegrowthprocess，concreteself—healingratecanbeimprovedbyaddingexpansionagentKeywords：t

9、heperiodofdisturbed；surfacecracksofconcrete；rateofselfhealingofconcrete當(dāng)今國(guó)省干線上的在役橋梁由于交通運(yùn)輸量及汽車載重量的增加，使其損害日趨嚴(yán)重|】]，為了對(duì)其進(jìn)行加固，不得不中斷、封閉交通因此，研究抗擾動(dòng)混凝土具有重要的現(xiàn)實(shí)意義和明顯的經(jīng)濟(jì)效益]本文從縮短混凝土受擾期、減少表面裂縫和提高自愈合率三個(gè)方面研究了改善混凝土抗擾動(dòng)性能的三種途徑1試驗(yàn)材料與方法水泥為安徽