混凝土构件锈胀裂缝宽度与锈蚀量关系的试验研究

摘要

主要研究了混凝土开裂后裂缝宽度与钢筋锈蚀量之间的关系，并通过18组150 mm ×150 mm ×150 mm的标准立方体试件的锈蚀对比试验，得出了锈胀裂缝宽度与钢筋锈蚀深度之间呈线性关系，并分析了钢筋截面损失率对钢筋锈蚀深度的影响；鉴于锈胀裂缝相对钢筋锈蚀率的观测更容易，给出了由裂缝宽度推测钢筋锈蚀量的公式。不仅对工程实践中钢筋锈蚀量的无损检测有很大帮助，而且可以为建筑结构的耐久性评估提供依据。%T he paper focuses on the relationship betw een crack w idth and steel corrosion extent after concrete cracking. Through analysis of 18 groups cube specimens ( 150 mm ×150 mm ×150 mm) ,the relation between crack w idth and steel corrosion depth,w hich is linear,can be got. T he relation betw een steel corrosion depth and steel section loss rate can also be indicated. T herefore,T he extent of steel corrosion can be forecasted by crack w idth. T he results can be used to get the extent of steel corrosion with nondestructive testing( NDT ) ,and provide a basis for the durability assessm ent in engineering practice.