再生混凝土物理力学性能试验研究

43120131BuildingStructureVol．43No．1Jan．2013*450002、5。、、、。、。TU528A1002-848X201301-0073-03ExperimentalstudyonmechanicalperformancesofrecycledconcreteHaoTongShiLeiChenJingjingSchoolofCivilEngineeringZhengzhouUniversityZhengzhou450002ChinaAbstractPreparationoffivedifferentmixofrecycledbrickconcreteblockswasdone．Thecompressivestrengthcarbonationdepthelasticmodulusshrinkageandothermechanicalperformanceswereobtainedthroughthetests．Therelationshipsbetweentheaxialcompressivestrengthandcubecompressivestrengthelasticmodulusandcompressivestrengthwereobtained．Carbonationandshrinkageformulasofconcretewerealsofitted．Keywordsrecycledconcretecompressivestrengthcarbonationshrinkageelasticmodulus*20102010-18。[e-mail]。0、、“”、。100%、100%53728d、、、。11.1PC32.51。1/mm5～750～5/kg/m316102590/kg/m37751198/kg/m38751317/%5254/%464924h/%16.35.8/%0.54.7—4.71.21-55RARBRCRDRE2。2/%/kg/m3/kg/m3/kg/m3/kg/m3/kg/m3RA0.605116026776472198RB0.5549160291718738100RC0.5047160320672752102RD0.4545160356624763103RE0.404316040057677010422.153728d3《》GB/T50081—2002、、、。20132.22.2.11。3d7d0.55～0.628d521～25MPa37d28d。2.2.2《》GB50010—2010fckfcukfck=0.88αc1αc2fcuk1αc1C50αc1=0.76C80αc1=0.82αc2C40αc2=1.0C80αc2=0.870.88。C40αc10.76αc21.0fckfcuk10.88。fckfcukfck=0.76fcuk228d0.72～1.020.86。20.76。fckfcuk。2.2.328dEcEc=1055．2+29．8/fcuk3fcuk28d。28d2。33μ=0.97δ=0.0261。3/MPa/MPa3/MPa3RA1430017.0143820.99RB1490019.5148631.00RC1450023.3154350.94RD1440021.3151540.95RE1520024.4155730.981228d2.2.4RE4。4/mm4/mm/47d28d7d28d7d28d0.600.61.150.431.181.400.970.550.31.300.281.141.071.140.500.31.110.291.161.030.960.450.30.710.391.030.770.6943。3dCO2。3～7d47431．CO2。7dCa2+CaCO3。《》CECS2202007xc=KCO2·Kk1·Kks·T0．25·RH1．5·1－RH·－12．860/fRCcu+1．105·槡t4KCO2CO2KCO2=C0/0．槡03C0CO2/%Kk11.41.0Kks1.01.7T/℃RH/%fRCcu/MPat/d。44μ=1.00δ=0.221。2.2.55。54。。0～7d。5/d/×10-35/×10-35100.0122020.02750.02341.1730.03200.03380.9540.04050.04340.9350.04620.05230.8860.05510.06070.9170.05820.06840.85140.10290.11120.93280.18180.16161.1234。εt0=t78．62+3．38t×10－355μ=0.97δ=0.111。31、。C20。2《》GB50010—2010fckfcuk。3。43d3～7d7d。。5。。1．D．2010．2．D．2006．3．D．2010．4．J．200128818-20．5．J．200217-9．57