Abstract：
In order to study the thermal conductivity of high volume of fly ash concrete. The changing rule of the thermal conductivity of concrete was quantitatively investigated by orthogonal test. Five testing variables, including the fly ash content, water-cement ratio, sand ratio, water reducing agent dosage and aggregate concrete of dry and wet condition were considered in this test. The results indicated that sand ratio, the content of fly ash and water reducing agent were the significant factors. The significance of these factors is as follows from greatest to least:sand ratio, fly ash, water reducing agent dosage, aggregate concrete of dry and wet condition, Water-cement ratio. Based on the optimal combination of the maximum and minimum of thermal conductivity, to provide a reference for the estimated thermal diffusivity by the regression equation regression analysis.
