Investigation of Self-Compacting Concrete Behaviour Under Axial Load by Acoustic Emission Method

Abstract

Abstract The Acoustic Emission (AE) method is a non-destructive test method used when monitoring the damage propagation by detecting high-frequency elastic waves produced by the refraction process. Self-Compacting Concrete (SCC) is a special type of concrete that does not require vibration, has excellent fluidity, and is resistant to segregation. In this study, it is aimed to investigate the functioning of the AE technique, which is frequently used in normal concrete, in the behaviour of SCC. For this purpose, simultaneous monitoring of SCCs under uniaxial compressive load was carried out with the AE method. CEM I 42.5 R cement was used as a binder in the production of concrete, and Fly Ash (FA) and Marble Powder (MP) were used as mineral additives. In SCC mixture, stone dust was used as filler material and chemical additive Sika brand 4567 Hi-Tech was used as plasticizer. Cement dosage is 400 kg, water/powder ratio is 0.36, chemical additive ratio is 1.85%, and stone dust amount is 125 kg. The mineral additives which were used included in the mixture replaced with cement by 20%. In addition to the compressive strength of SCCs, crack analysis, AE amplitude, AE Energy, Ringing Counts and Cumulative Count results were examined as a result of AE measurements. With the AE parameters obtained as a result of the simultaneous measurement, the behaviour of SCCs under uniaxial load was successfully monitored.