氧化镁改性混凝土干缩裂缝自愈合性能试验  

Experimental study on self-healing performance of drying shrinkage cracks in MgO modified concrete

作　　者：谢燕飞 XIE Yanfei(Gansu Provincial Transportation Research Institute Group Co.,Ltd.,Lanzhou 730070)

机构地区：[1]甘肃省交通科学研究院集团有限公司,甘肃兰州730070

出　　处：《中国建材科技》2021年第6期94-95,122,共3页China Building Materials Science & Technology

摘　　要：混凝土早期裂缝是影响混凝土使用质量和使用寿命的重要因素,氧化镁改性混凝土能够减少早期干缩裂缝发生率。本文对氧化镁改性混凝土进行分析,研究影响其干缩裂缝的主要因素,探讨其干缩裂缝自愈性能。研究显示,氧化镁能够限制混凝土膨胀率,促进裂缝愈合,可广泛应用于混凝土改性中。The early crack is an important factor affecting the quality and service life of concrete.Magnesium oxide modified concrete can reduce the incidence of early shrinkage cracks.In this paper,the magnesium oxide modified concrete is analyzed,the main factors affecting the shrinkage cracks are studied,and the self-healing and performance of the shrinkage cracks are discussed.The research shows that magnesium oxide can limit the expansion rate of concrete and promote its crack healing,which can be widely used in concrete modification.

关 键 词：氧化镁 混凝土 干缩裂缝 自愈合性能 

分 类 号：TU528[建筑科学—建筑技术科学]