TY - JOUR AU - Kopecký, Lukáš PY - 2016/06/30 Y2 - 2024/03/29 TI - NONDESTRUCTIVE TESTING OF SHOTCRETE JF - Czech Journal of Civil Engineering JA - CzeJCivEng VL - 2 IS - 1 SE - DO - 10.51704/cjce.2016.vol2.iss1.pp76-82 UR - https://cjce.cz/journal/article/view/72 SP - 76-82 AB - <p>Sprayed concrete is recently used mainly for creating small structures in building construction, where&nbsp;sprayed concrete is placed by manual spraying way. Quality of small constructions is not often&nbsp;checked because of difficulties of making ordinarily used destructive tests. For description of concrete&nbsp;construction quality is possible to use nondestructive testing based on velocity of ultrasound impulse&nbsp;through structure. Experiment was based on checking of appropriateness of using ultrasound testing&nbsp;measured on test slab and cores made from test slab. Experiment shows that the best results for&nbsp;describing homogeneity were obtained by semi-direct ultrasonic testing and direct ultrasonic testing on&nbsp;cores. Verification of the shotcrete quality using direct or semi - directultrasonic testing is difficult to&nbsp;do in the reality and therefore this article proposes a solution.</p> ER -