水泥基混凝土材料抗硫酸盐侵蚀性能研究  

Study on sulfate resistance of cement-based concrete materials

作　　者：仝雨焕 TONG Yuhuan(China Railway 16th Bureau Group First Engineering Co.,Ltd.,Beijing 101300)

机构地区：[1]中铁十六局集团第一工程有限公司,北京101300

出　　处：《中国建材科技》2024年第4期95-97,63,共4页China Building Materials Science & Technology

摘　　要：硫酸盐侵蚀是影响混凝土耐久性的重要原因。本研究开展不同浸渗方式和不同离子侵蚀测试,以研究水泥基混凝土材料硫酸盐侵蚀作用下的特性。结果显示,在水泥中加入30%的矿渣粉可显著提高混凝土的抗硫酸盐腐蚀性能。掺加30%粉煤灰时,在硫酸钠侵蚀下混凝土耐蚀系数随时间增长逐渐减弱,在硫酸镁侵蚀下混凝土耐蚀系数在180d后迅速下降。就长期抗硫酸盐腐蚀性能来看,在钠、镁含量较高的环境下,掺入30%的矿渣微粉可有效改善混凝土的抗冲性。Sulfate attack is a significant factor impacting the durability of concrete.This paper investigates the characteristics of cement-based concrete materials under sulfate attack through tests involving various immersion methods and types of ionic erosion.The results show that adding 30% slag powder to cement can significantly enhance the sulfate resistance of concrete.When added with 30% fly ash,the corrosion resistance coefficient of concrete gradually decreases with time under sodium sulfate attack,and rapidly decreases after 180 days under magnesium sulfate attack.In terms of long-term resistance to sulfate attack,adding 30% slag powder can effectively improve the impact resistance of concrete in environments with high sodium and magnesium content.

关 键 词：水泥基混凝土 硫酸盐侵蚀 矿渣微粉 粉煤灰 

分 类 号：TU528[建筑科学—建筑技术科学]