基于灰关联熵分析的大掺量粉煤灰混凝土导热性能影响因素研究

Grey Correlation Entropy Method to Analyze Thermal Properties of High Volume Fly Ash Concrete

为了探究各因素对大掺量粉煤灰混凝土导热性能的影响,通过试验,以导热系数为主要导热性能指标,运用灰关联熵分析的手段,定量分析了水胶比、粉煤灰掺量、减水剂掺量、砂率和骨料干湿状态对大掺量粉煤灰混凝土导热系数影响的显著程度。经计算分析得出:对大掺量粉煤灰混凝土导热性能影响最大的是砂率,其次依次为粉煤灰掺量、水胶比、减水剂掺量和骨料干湿状态。在进行大掺量粉煤灰混凝土配合比设计时,从导热性能方面考虑,必须严格控制砂率。

In order to explore the factors that influence the performance of high volume fly ash concrete heat conduction,through the test,use conductivity as the mainly thermal performance indicators, using the grey relation entropy analysis method,to analysis the effect of degree of water binder ratio,fly ash content, water reducing agent dosage, sand ratio and aggregate in dry and wet conditions to high vol- ume fly ash concrete heat conduction quantitativiy. Through calculation and analysis：the most significant factor influence on performance of high volume fly ash concrete heat conduction is sand rate,followed by the amount of fly ash, water binder ratio, dosage of water reducer and aggregate in dry and wet condi- tions. In high volume fly ash concrete mix design, considering thethermal conductivity performance, must strictly control therate of sand.