Recommended Method For Earlier Nondestructive Inspection Of Concrete Quality In structures -Quality inspection methods of concrete in structures by nondestructive testing Part 3-

摘要

The recommended method consists of 24-hour ultrasonic testing and 3-day rebound hammer testing after placing on concrete in structures The merits of this method are as follows: (1) The earlier determination (2) Getting information of qualities very early and accurately step by step; combining 24-hour pulse velocity with 3-day rebound number (3) The age of 24-hour or 3-day is the optimum age for each nondestructive testing respectively (4) The direct inspection of structures (5) Getting the alternative quality characteristics of strength and durability. This paper describes the investigation results that have brought the basis of the above items.