Flexure response of thermal loaded concrete specimens by acoustic emission method

Abstract

Abstract. The response to fire of concrete structural members depends on the thermal, mechanical, and deformation properties of concrete. These properties vary significantly with temperature depending on the composition and characteristics of the concrete batch mix as well as heating rate and other environmental conditions. The paper presents the effects of a high temperature on selected physical properties of concrete. The main aim of the article is the evaluation of monitoring concrete properties loaded in a few thermal steps up to 1200 °C. Therefore, the concrete specimens were heated in a programmable laboratory furnace at a heating rate of 5 °C/min. The specimens were loaded at six temperatures, 200 °C, 400 °C, 600 °C, 800 °C, 1000 °C, and 1200 °C maintained for 60 minutes. The acoustic emission activity and some material characteristics were evaluated in a three-point bending test.

Application of Acoustic Emission Method and Impact Echo Method to Structural Rehabilitation

“…Non-destructive acoustic methods such as impact-echo (IE) and acoustic emission (AE) can provide rapid non-destructive measurements of concrete defects and the condition of concrete degraded by various factors [4], [5], [6]. These methods can be used as a continual test procedure in terms of structural health monitoring [7] or as a diagnostic tool in a post-fire survey.…”