欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
研究了不同龄期受损混凝土经过相同养护期后的自然愈合现象．混凝土受损后的自愈合实质上是损伤部位未水化或水化不充分的胶凝材料加速水化或进一步水化生成新的水化产物弥合裂缝的过程．以超声波速的变化表征混凝土受压开裂后的损伤程度，建立了混凝土损伤量与愈合状况之间的关系．结果表明，混凝土材料存在一个损伤阈值：当混凝土的损伤低于损伤阈值时，自愈合率随着损伤量的增大而增大；当混凝土损伤超过损伤阈值时，自愈合率随着损伤量的增大而降低．
英文摘要：
The self-healing process of concretes damaged at different ages and then cured was investigated. The self-healing of damaged concrete is a processes of crack closure with new hydrated products from further hydration of unhydrated or insufficiently-hydrated cement particles in damaged regions. The relation between damage degree and self-healing ratio of concrete was set up by ultrasonic velocity change expressing the damage degree after cracking. The results showed that there existed a damage threshold： when the damage of concrete was below the threshold, the self-healing ratio was increased with the increase of damage degree; while the concrete damage exceeded the threshold, the self-healing ratio was decreased with the increase of damage degree.
同期刊论文项目
同项目期刊论文
位置：