预测混凝土中碳化深度的数学模型

THE MATHEMATICAL MODEL OF PREDICTED CARBONATION DEPTH IN CONCRETE

本文运用国内外有关混凝土碳化的研究成果,着重分析了水灰比、水泥用量及品种、强度和混合材对混凝土碳化的影响。根据收集的大量试验室和室外实测值的碳化数据,考虑了上述影响因素而选择的四个较典型的预测碳化深度的公式,将实测值与四个计算值进行线性回归。由它们的相关性、离散程度,确定了预测混凝土碳化公式的形式,同时给出了普通水泥混凝土、矿渣水泥混凝土、粉煤灰水泥混凝土和掺粉煤灰矿渣水泥混凝土的碳化速度修正系数。

Based on various research results from China and other countries in the field of concrete carbonation, the effect of water-cement ratio, cement content and type, strength and the addition of fly ash on the carbonation of concrete was analysed in this paper. Considering these effecting factors, four typical equation, which were ussed to predict the carbonation depth of concrete by other researchs, had been chosen based on a lot of carbonation data collected from laboratory experiments and outdoor measurements, and the liner-regression analyses between measured and calculated data were carried out. From their correlation and dispersed deviation, the equation form for predicting concrete carbonation depth was determined and the coefficients of carbonation rate of OPC concrete, slag cement concrete, OPC concrete with fly ash, slag cement concrete with fly ash were obtained as well.