NONDESTRUCTIVE TESTING OF SHOTCRETE

Abstract

Sprayed concrete is recently used mainly for creating small structures in building construction, where sprayed concrete is placed by manual spraying way. Quality of small constructions is not often checked because of difficulties of making ordinarily used destructive tests. For description of concrete construction quality is possible to use nondestructive testing based on velocity of ultrasound impulse through structure. Experiment was based on checking of appropriateness of using ultrasound testing measured on test slab and cores made from test slab. Experiment shows that the best results for describing homogeneity were obtained by semi-direct ultrasonic testing and direct ultrasonic testing on cores. Verification of the shotcrete quality using direct or semi - directultrasonic testing is difficult to do in the reality and therefore this article proposes a solution.