国内外混凝土力学性能预测模型对比研究
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摘要
分析了英标、国标、水运标准等规范关于标准养护条件下混凝土早期强度、弹性模量的预测模型,利用国内外多个工程的实测数据,评估了国内外混凝土早期力学性能预测模型的适用性,得出了英标模型较适合用于混凝土早期力学性能预测的结论。根据工程实测数据,提出了与混凝土胶凝材料体系相关的修正掺合料系数,拟合了修正掺合料系数与英标公式中胶凝材料系数的关系,形成了一套利用3d或7d力学性能参数预测28d力学性能参数的实用模型。
The British standard, GB and specification for waterway prediction model of early strength and elastic modulus of concrete under standard curing conditions were compared, the applicability of different prediction models was compared using a set of measured data of many projects, results show that the British standard model is suitable for the prediction of early mechanical properties of concrete. According to the measured data, a parameter related to the concrete admixture coefficients was proposed, the relationship between the concrete admixture coefficients and the coefficient in the British standard formula was fitted, and a more applicable prediction model of the early mechanical properties of concrete was formed, which can be used for the 28 d mechanical parameters prediction by using 3 d or 7 d mechanical parameters.
The British standard, GB and specification for waterway prediction model of early strength and elastic modulus of concrete under standard curing conditions were compared, the applicability of different prediction models was compared using a set of measured data of many projects, results show that the British standard model is suitable for the prediction of early mechanical properties of concrete. According to the measured data, a parameter related to the concrete admixture coefficients was proposed, the relationship between the concrete admixture coefficients and the coefficient in the British standard formula was fitted, and a more applicable prediction model of the early mechanical properties of concrete was formed, which can be used for the 28 d mechanical parameters prediction by using 3 d or 7 d mechanical parameters.
引文
[1]建筑工程冬期施工技术规程:JGJ/T 104―2011[S].北京:中国建筑工业出版社,2011.
[2]孙双鑫,周晓明.冬期施工采用电伴热混凝土早期强度发展的研究[J].建筑技术,2017,48(10):1092-1095.
[3]Eurocode 2 design of concrete structures-part1-1-general rules and rules for buildings:BS EN 1992-1-1:2004[S].Brussels:European Committee for Standardization,2004.
[4]大体积混凝土施工规范:GB 50496-2018[S].北京:中国建筑工业出版社,2018.
[5]水运工程大体积混凝土温度裂缝控制技术规程:JTS202-1―2010[S].北京:人民交通出版社,2010.
[6]郭志福,郭杰,朱胜名.成熟度法推算混凝土早期强度的应用[J].建筑技术,2001,32(10):664-665.
[7]于方,熊建波,邓春林等.养护方式对C100超高强混凝土抗压强高度的影响规律[J].硅酸盐通报,2017,36(增刊):194-198,218.
[2]孙双鑫,周晓明.冬期施工采用电伴热混凝土早期强度发展的研究[J].建筑技术,2017,48(10):1092-1095.
[3]Eurocode 2 design of concrete structures-part1-1-general rules and rules for buildings:BS EN 1992-1-1:2004[S].Brussels:European Committee for Standardization,2004.
[4]大体积混凝土施工规范:GB 50496-2018[S].北京:中国建筑工业出版社,2018.
[5]水运工程大体积混凝土温度裂缝控制技术规程:JTS202-1―2010[S].北京:人民交通出版社,2010.
[6]郭志福,郭杰,朱胜名.成熟度法推算混凝土早期强度的应用[J].建筑技术,2001,32(10):664-665.
[7]于方,熊建波,邓春林等.养护方式对C100超高强混凝土抗压强高度的影响规律[J].硅酸盐通报,2017,36(增刊):194-198,218.