掺粉煤灰水泥砂浆抗稀硫酸侵蚀的试验研究

Experiment and Study for Corrosion of Fly Ash Cement Mortar by Sulfuric Acid

为研究稀硫酸侵蚀掺粉煤灰水泥砂浆的规律,对砂浆试块进行长期浸泡试验,用滴酸法间接测得腐蚀速率并结合偏相关理论分析了影响砂浆试块腐蚀速率各个因素。分析表明：pH值相同时,粉煤灰掺量0%~30%的砂浆试块的腐蚀过程符合浓度边界层溶解反应模型;试块的流动度与抗腐蚀能力呈负相关;掺粉煤灰并不能明显改善水泥砂浆的抗稀硫酸侵蚀的性能。

A long time immersion test of fly ash cement mortar in dilute sulfuric acid was carried out to study the mechanisms of corrosion-resistant.The rate of mortar corrosion was indirectly recorded and combining with the theory of partial correlation,the parameters that can affect the rate were obtained.It was showed that in soak solution with the same pH value,corrosion process of cement mortar with 0%~30% fly ash can reflect the dissolving reaction model of consistency boundary,with the fluidity of cement mortar inversely related to corrosion-resistant capability of cement mortar.The corrosion-resistant capability of cement mortar can not be improved remarkably by fly ash.