湖南大学学报（自然科学版）2016，Vol.43Issue(12)：62-70,9.
电脉冲下矿物掺合料对砂浆硫酸盐侵蚀的影响∗
Effect of Mineral Admixtures on Sulfate Attack for Mortars Subj ected to Electrical Pulse
摘要
Abstract
The effect of mineral admixtures on sulfate attack for mortars subj ected to electrical pulse was investiga-ted by the appearance observation and strength measurement on the mortars with and without mineral admixtures un-der electrical pulse and immersion.The microstructures of the damaged specimens were analyzed by using scanning electron microscopy and energy dispersive spectrometer.The results showed that electrical pulse accelerated the pene-tration of the external sulfate ions into the mortars,and the sulfates then reacted with the cement hydration products to form massive ettringites.As a consequence,the specimens displayed significant cracking and spalling as well as strength reduction within a short period.Mineral admixtures improve the sulfate resistance performance of the mor-tars,and the improvement is increased with the increase of the amount of the admixtures.However,the mortars blended with mineral admixtures were still subj ected to the dramatic sulfate corrosion under electrical pulse.The above findings indicate electrical pulse the accelerated sulfate attack,and also provide a new idea in rapidly evaluating the sulfate resistance of cement-based materials.关键词
硫酸盐侵蚀/电脉冲/水泥砂浆/矿物掺合料/微观结构分析Key words
sulfate attack/electrical pulse/cement mortars/mineral admixtures/microstructural analy-sis分类
建筑与水利引用本文复制引用
黄谦,王冲,周莹,杨长辉..电脉冲下矿物掺合料对砂浆硫酸盐侵蚀的影响∗[J].湖南大学学报（自然科学版）,2016,43(12):62-70,9.基金项目
国家自然科学基金资助项目(51572038),National Natural Science Foundation of China(51572038) （51572038）
