新型复合砂浆对混凝土抗渗及加固性能的研究

采用HS-4型混凝土抗渗仪以及抗渗标号法分别对素混凝土试块、未掺加添加剂的水泥砂浆涂抹在混凝土迎水面的试块及掺加新型添加剂的复合砂浆涂抹在混凝土迎水面的试块进行抗渗试验，改变砂浆的涂抹厚度及添加剂的掺入量，分析各组试验所得混凝土抗渗等级数据.研究结果表明,厚度为20 mm及添加剂掺加量为18%的高性能复合砂浆涂抹在混凝土表面可大幅提高混凝土的抗渗性能.高性能水泥复合砂浆钢筋网薄层可有效加固混凝土结构.
The impermeability experiments were conducted by adopting a HS-4 concrete permeability instrument and the permeability labeling method on the concrete block covered with composite mortar mixed without additives and with new additive respectively, with emphasis on the thickness of the added mortar and incorporation of additives. The obtained permeability grades of all specimens were then investigated. The results showed that the concrete impermeability was improved effectively by applying high performance composite mortar with 20 mm thickness and 18 % additive content on the concrete surface. Furthermore， the reinforced mesh thin layer of high performance composite mortar reinforced the concrete structure effectively.