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首页> 外文期刊>Magazine of Concrete Research >A Model For Predicting Thermal Conductivity Of Concrete
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A Model For Predicting Thermal Conductivity Of Concrete

机译：混凝土导热系数的预测模型

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摘要

This study investigates the thermal conductivity of fly ash concrete. Experiments were conducted to obtain the thermal conductivity of fly ash-cement pastes and mortars. Pastes were prepared to investigate the effect of fly ash, and mortar specimens were prepared for studying the effect of aggregates. It was found from the test that the replacement of cement by fly ash resulted in lower thermal conductivity. Thermal conductivity of mortar was higher than that of the cement paste. A simple parallel model for predicting thermal conductivity of fly ash concrete was proposed as a time-, material- and mix-proportion-dependent function. Thermal conductivity of concrete was computed based on the volumetric fractions and respective thermal conductivity values of each ingredient including the hydrated and pozzolanic products. Thermal conductivity of all ingredients in concrete are obtained from other studies except for the fly ash powder and hydrated products. In this study, thermal conductivity of hydrated product was obtained by the use of regression analysis together with the test results of cement paste, and thermal conductivity of fly ash powder was derived from the test results of cement-fly ash paste. The model was satisfactorily verified with various experimental results for pastes, mortars and concretes.
机译：这项研究调查了粉煤灰混凝土的导热系数。进行实验以获得粉煤灰水泥浆和砂浆的热导率。制备糊状物以研究粉煤灰的作用，并准备灰浆标本以研究骨料的作用。从测试中发现，用粉煤灰代替水泥导致较低的热导率。砂浆的导热系数高于水泥浆的导热系数。提出了一种简单的预测粉煤灰混凝土导热系数的并行模型，该模型是时间，材料和配合比例的函数。根据包括水合和火山灰产品在内的每种成分的体积分数和各自的热导率值计算混凝土的热导率。除粉煤灰粉和水合产品外，混凝土中所有成分的导热系数均来自其他研究。在这项研究中，通过回归分析与水泥浆的测试结果一起获得了水合产品的导热系数，粉煤灰粉的导热系数是从水泥-粉煤灰浆的测试结果中得出的。该模型已通过糊，砂浆和混凝土的各种试验结果令人满意地验证。

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  • 来源
    《Magazine of Concrete Research》 |2009年第4期|271-280|共10页
  • 作者

    P. Choktaweekarn; W. Saengsoy; S. Tangtermsirikul;

  • 作者单位

    School of Civil Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani, 12121, Thailand;

    Division of Solid Waste, Resources and Geoenvironmetal Engineering, Graduate School of Engineering, Hokkaido University, Japan;

    Construction and Maintenance Technology Research Center (CONTEC), School of Civil Engineering and Technology, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani, 12121, Thailand;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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