掺活化煤渣粉混凝土表面氯离子浓度的时变规律

发布时间：2018-08-22 08:45

【摘要】：为研究活化煤渣粉掺量和腐蚀时间对再生混凝土表面氯离子浓度的影响,测试了不同活化煤渣粉掺量的再生混凝土在3.5%Na Cl溶液中浸泡不同时间的各混凝土的表面氯离子浓度。试验结果表明:混凝土的表面氯离子浓度随腐蚀时间的延长而增长,且随着腐蚀时间的增加而趋于稳定;混凝土表面氯离子浓度随着活化煤渣粉掺量的增加先增大后降低,当煤渣粉掺量为30%时,其值达到最小。建立了活化煤渣掺量与混凝土表面氯离子浓度的指数模型,并对模型进行验证;该模型计算数据与实测数据很相近,可用来预测混凝土表面氯离子浓度,并作为预测掺活化煤渣粉混凝土结构寿命的理论依据。
[Abstract]:In order to study the influence of activated cinder powder content and corrosion time on the surface chlorine ion concentration of recycled concrete, the surface chlorine ion concentration of recycled concrete with different activated cinder powder content immersed in 3.5%Na Cl solution for different time was tested. The experimental results show that the chloride ion concentration on the surface of concrete increases with the increase of corrosion time, and tends to be stable with the increase of corrosion time, and the chloride ion concentration on concrete surface increases first and then decreases with the increase of activated cinder powder content. When the amount of cinder powder is 30%, its value reaches the minimum. An exponential model of activated coal slag content and chloride ion concentration on concrete surface is established and verified. The calculated data of the model are very close to the measured data and can be used to predict the chloride ion concentration on concrete surface. It also serves as the theoretical basis for predicting the structural life of concrete mixed with activated cinder powder.
【作者单位】：南昌工程学院;
【基金】：江西省教育厅基金(GJJ151140) 国家重点基础研究发展计划(“973”计划)项目(2009CB623203) 国家自然科学基金项目(51178221);国家自然科学基金联合基金项目(U1507120)
【分类号】：TU528

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