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以聚氨酯、环氧树脂和氯化橡胶3种典型有机成膜涂层混凝土试件为研究对象,通过实验室加速碳化试验研究了涂层类别和涂膜厚度对不同水灰比混凝土抗碳化能力改善的定量影响规律。结果表明:敷设有机成膜涂层可有效改善混凝土的抗碳化能力。涂刷一遍涂层可提高普通混凝土的抗碳化能力50%以上,涂刷两遍涂层可达70%以上。基于单位涂层厚度对混凝土抗碳化能力的改善指标γ,3种涂层对混凝土抗碳化能力改善效果的排序依次为:聚氨酯涂层>氯化橡胶涂层>环氧树脂涂层;敷设有机成膜涂层对高水灰比混凝土抗碳化能力的改善更有效。最后基于最小二乘回归拟合建立了3种有机成膜涂层混凝土的碳化深度实用预测模型。
Taking three types of typical organic film-coated concrete specimens of polyurethane, epoxy resin and chlorinated rubber as test objects, the effects of coating type and coating film thickness on the carbonation resistance of concrete with different water-cement ratio were studied through laboratory accelerated carbonation test The quantitative impact of the law. The results show that laying organic film coating can effectively improve the anti-carbonation ability of concrete. Brush the coating again to improve the anti-carbonation capacity of ordinary concrete more than 50%, brushing twice over the coating up to 70%. Based on unit coating thickness on the anti-carbonation of concrete to improve the performance indicators γ, three kinds of coatings on the anti-carbonation of concrete to improve the effect of the sort order: polyurethane coating> chlorinated rubber coating> epoxy coating; Film coating is more effective in improving the carbonation resistance of high-water-cement than concrete. Finally, based on the least-squares regression fitting, three practical models for predicting carbonation depth of organic-coated concrete were established.