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重量m(kg)比热(kj/kg.k)热当量Wc(kj/℃)温度Ti(℃)热量TimC(kj)搅拌温度T0(℃)(1)(2)(3)=(1)*(2)(4)(5)=(3)*(4)(6)=Σ(5)/Σ(3)水泥3000.84252256300.0结论砂子6260.84525.843015775.2石子12700.841066.82829870.4砂中含水量314.20130.2253255.0石中含水量134.2054.6251365.0拌合水1364.20571.22514280.0合计2376260170845.627.2或者用公式To=[0.22(Ts*ms+Tg*mg+Tc*mc)+Ts*ws+Tg*wg+Tw*mw]/[0.22(ms+mg+mc)+mw+ws+wg]计算。输出数据材料名称T0=ΣTimC/ΣmC混凝土拌合温度T0计算表输入数据符号TsmsTs*msTgmgTg*mgTcmcTc*mcwswgTwmwTw0PT0单位℃kg℃kg℃kgkgkg℃kg℃℃数据30626187802812703556025300750031135180150.118#####Ts、Tg、Tc、Tw:砂、石、水泥、水的温度。Two:加冰前水的温度。mc、ms、mg:水泥、扣除含水量的砂、石的重量。P:加冰率,实际加水量的%。mw、ws、wg:水及砂、石中游离水的重量。混凝土加冰拌合温度公式To=[0.22(Ts*ms+Tg*mg+Tc*mc)+Ts*ws+Tg*wg+(1-P)*Tw*mw-80*P*mw]/[0.22(ms+mg+mc)+mw+ws+wg]混凝土加冰拌合温度T0计算表混凝土浇筑温度计算公式Tp=To+(Ta-To)(θ1+θ2+θ3+……+θn)Tp:混凝土浇筑温度To:混凝土拌合温度Ta:混凝土运输和浇筑时室外温度θ1、θ2、θ3、……θn:温度损失系数,按以下规定取用(1)、混凝土装卸和运转,每次θ=0.032(3)、浇筑过程中,θ=0.003t,t为浇注时间(min)混凝土浇筑温度Tp计算(2)、混凝土运输时,θ=At,t为运输时间(min),6方的搅拌车A=0.0042,用1.6方方形(圆形)吊斗起吊入模A=0.0013(0.0009)其余的运输方式A值查表。运输和起吊都要算θ1.001.251.502.503.004.001.00####1.502.503.004.00天℃kgJ/kgkJ/kg.Kkg/m3℃℃℃℃℃℃℃3241994610.962500380.360.420.490.650.680.7437.840.142.748.850.052.36241994610.962500380.290.310.460.620.670.7335.135.841.647.749.651.99241994610.962500380.170.190.380.590.630.7230.531.338.546.648.151.512241994610.962500380.090.110.290.480.570.6527.428.235.142.345.848.815241994610.962500380.050.070.210.380.450.5525.926.732.038.541.245.018241994610.962500380.030.040.150.290.360.4625.125.529.735.137.841.621241994610.962500380.010.030.120.230.300.3724.425.128.632.835.538.124241994610.962500380.080.190.250.3027.131.333.635.527241994610.962500380.050.160.210.2525.930.132.033.630241994610.962500380.040.150.190.2425.529.731.333.2Tp:混凝土浇筑温度Th:混凝土最终绝热温升值,Th=(mc*Q)/(C*ρ)ξ:不同浇筑块厚度的温降系数mc:每立方米混凝土水泥用量ρ:混凝土质量密度C:混凝土的比热在0.84~1.05kJ/kg.K之间,一般取0.96kJ/kg.KQ:每kg水泥水化热量,32.5普通硅酸盐水泥为377J/kg,42.5为461J/kg;32.5矿渣硅酸盐水泥为355J/kgT(t):不同龄期混凝土内部温度,T(t)=Tp+Th*ξ不同龄期时混凝土的内部温度计算表ξ(不同的浇筑块厚度ξ不同)T(t)龄期TpmcQCρTh重量m(kg)比热(kj/kg.k)热当量Wc(kj/℃)温度Ti(℃)热量TimC(kj)搅拌温度T0(℃)(1)(2)(3)=(1)*(2)(4)(5)=(3)*(4)(6)=Σ(5)/Σ(3)水泥3000.84252256300.0结论砂子6260.84525.843015775.2石子12700.841066.82829870.4砂中含水量314.20130.2253255.0石中含水量134.2054.6251365.0拌合水1364.20571.22514280.0合计2376260170845.627.2或者用公式To=[0.22(Ts*ms+Tg*mg+Tc*mc)+Ts*ws+Tg*wg+Tw*mw]/[0.22(ms+mg+mc)+mw+ws+wg]计算。符号TsmsTs*msTgmgTg*mgTcmcTc*mcwswgTwmwTw0PT0单位℃kg℃kg℃kgkgkg℃kg℃℃数据30626187802812703556025300750031135180150.118#####Ts、Tg、Tc、Tw:砂、石、水泥、水的温度。Two:加冰前水的温度。mc、ms、mg:水泥、扣除含水量的砂、石的重量。P:加冰率,实际加水量的%。mw、ws、wg:水及砂、石中游离水的重量。混凝土加冰拌合温度公式To=[0.22(Ts*ms+Tg*mg+Tc*mc)+Ts*ws+Tg*wg+(1-P)*Tw*mw-80*P*mw]/[0.22(ms+mg+mc)+mw+ws+wg]混凝土拌合温度T0计算表混凝土加冰拌合温度T0计算表材料名称T0=ΣTimC/ΣmC输入数据输出数据混凝土浇筑温度计算公式Tp=To+(Ta-To)(θ1+θ2+θ3+……+θn)Tp:混凝土浇筑温度To:混凝土拌合温度Ta:混凝土运输和浇筑时室外温度θ1、θ2、θ3、……θn:温度损失系数,按以下规定取用(1)、混凝土装卸和运转,每次θ=0.032(3)、浇筑过程中,θ=0.003t,t为浇注时间(min)1.001.251.502.503.004.001.00####1.502.503.004.00天℃kgJ/kgkJ/kg.Kkg/m3℃℃℃℃℃℃℃3242753770.962400450.360.420.490.650.680.7440.242.946.053.254.657.36242753770.962400450.290.310.460.620.670.7337.037.944.751.954.156.89242753770.962400450.170.190.380.590.630.7231.632.541.150.552.356.412242753770.962400450.090.110.290.480.570.6528.028.937.045.649.653.215242753770.962400450.050.070.210.380.450.5526.227.133.441.144.248.718242753770.962400450.030.040.150.290.360.4625.325.830.737.040.244.721242753770.962400450.010.030.120.230.300.3724.425.329.434.337.540.624242753770.962400450.080.190.250.3027.632.535.237.527242753770.962400450.050.160.210.2526.231.233.435.230242753770.962400450.040.150.190.2425.830.732.534.8Tp:混凝土浇筑温度Th:混凝土最终绝热温升值,Th=(mc*Q)/(C*ρ)ξ:不同浇筑块厚度的温降系数mc:每立方米混凝土水泥用量ρ:混凝土质量密度C:混凝土的比热在0.84~1.05kJ/kg.K之间,一般取0.96kJ/kg.KQ:每kg水泥水化热量,32.5普通硅酸盐水泥为377J/kg,42.5为461J/kg;32.5矿渣硅酸盐水泥为355J/kgT(t):不同龄期混凝土内部温度,T(t)=Tp+Th*ξQCρTh不同龄期时混凝土的内部温度计算表混凝土浇筑温度Tp计算(2)、混凝土运输时,θ=At,t为运输时间(min),6方的搅拌车A=0.0042,用1.6方方形(圆形)吊斗起吊入模A=0.0013(0.0009)其余的运输方式A值查表。运输和起吊都要算θξ(不同的浇筑块厚度ξ不同)T(t)龄期Tpmc
本文标题:混凝土温度计算
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