关于《对〈质疑“回弹法检测混凝土抗压强度”〉一文中几个问题的看法》的讨论

Discussions on "views on some problems about the paper:questions on utilizing method of schmidt for testing strength of concrete"

在过去条件下所造成合理的存在,在新的条件下就可能并不合理,需要根据新的认识进行修正。对混凝土这种高度不均匀的材料,按宏观上均匀整体评价其宏观行为是可以的,但是在厘米数量级的尺度上就不能认为它是均匀的。现行回弹法剔除6/16回弹数据所得数据只能属于砂浆,而砂浆表面硬度和混凝土强度之间没有固定的关系,因为混凝土是变化的。当代混凝土的"碳化层"更增加了回弹法检测混凝土强度的不可用性。回弹法用于评价混凝土结构匀质性才是各得其所。

Existent is not always reasonable because of change and development of external world.It is necessary to be amended endlessly according to new cognition.For concrete being highly heterogeneous body,to evaluate macrostructure and behavior of it in the light of macroscopical homogeneous is acceptable in principle,but it can not be considered as homogeneous in scale of centimeter, Rebound data taken by eliminating 6 of 16 are only belong to mortar,and relationship between the surface hardness of mortar and strength of concrete is not aptotic, because concrete is various.So-called Carbonated layer of contemporary concrete has augmented impossibility of Schmidt hammer method used for testing strength of concrete.The best usage of Schmidt hammer method is evaluation on uniformity of concrete structure.