Numerical simulation of temperature rise of highstrength concrete incorporating silica fume and superplasticiser
Numerical simulation of temperature rise of highstrength concrete incorporating silica fume and superplasticiser
复制标题
硅灰高效减水剂高强混凝土温升数值模拟
DOI：
10.1680/adcr.2003.15.4.161
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发表时间：
2003
影响因子：
2
通讯作者：
M. H. Zhang
中科院分区：
文献类型：
--
作者：
S. Swaddiwudhipong;H. Wu;M. H. Zhang
建立了硅粉和高效减水剂掺入高强混凝土绝热温升过程的数值模型。在对素混凝土放热水化过程进行预测的基础上，考虑了超塑化剂对水化过程的阻滞作用和顺水粉对水化过程的影响。利用不同水胶比和初始温度下的几组混凝土试验数据对模型进行了验证。该数值模型能较好地预测含SF和高效减水剂的HSC的绝热温度史。计算模型需要的相关材料参数有：硅酸盐水泥的矿物组成、SF的掺量、高效减水剂的掺量、配合比和混凝土的初始浇筑温度。该模型可用于水化热、大体积混凝土内部温度分布的预测。
A numerical model is proposed to predict the process of adiabatic temperature rise of high-strength concrete (HSC) incorporating silica fume (SF) and superplasticisers. On the basis of predicting the exothermic hydration process of plain concrete, the proposed numerical model takes the retardation caused by the superplasticisers and the effect caused by the SF into consideration. The verification of the proposed model is carried out with several groups of experimental data on concrete at different water to cementitious material ratios and initial temperatures. This numerical model is able to predict the adiabatic temperature history of HSC with SF and superplasticiser. The computing model requires the following relevant material parameters, namely, the mineral composition of Portland cement, the amount of SF, the dosage of superplasticiser, mix proportions and initial placing temperature of concrete. The model is useful in the prediction of heat of hydration, temperature distribution in mass concrete prov...