Experimental Study on the Compressive Strength of Big Mobility Concrete with Nondestructive Testing Method

Abstract

An experimental study of C20, C25, C30, C40, and C50 big mobility concrete cubes that came from laboratory and construction site was completed. Nondestructive testing (NDT) was carried out using impact rebound hammer (IRH) techniques to establish a correlation between the compressive strengths and the rebound number. The local curve for measuring strength of the regression method is set up and its superiority is proved. The rebound method presented is simple, quick, and reliable and covers wide ranges of concrete strengths. The rebound method can be easily applied to concrete specimens as well as existing concrete structures. The final results were compared with previous ones from the literature and also with actual results obtained from samples extracted from existing structures.

Effect of natural carbonation on the pore structure and elastic modulus of the alkali-activated fly ash and slag pastes

“…carbonated and noncarbonated, 12 because its composition consisted of only 30 wt.% of GBFS and the results suggest that Mg 13 has not formed other reaction products except being distributed in the gel. The results of 14 Mg/Si ratio for S50 and S70 pastes suggest that the Mg is sporadically distributed throughout 15 the gel and that some other reaction products consisting Mg, such as hydrotalcite showed by 16 Haha et al [53], are intermixed with the gel, causing the data scattering. 17…”

“…Gel pore structure properties by N 2 adsorption, evolution of the BET surface area. 16 Reference S30 S50 S70 S100 1 Fig. 13.…”

Estimating Flexural Reliability of Carbonated Rc Bridge Beams Using Particle Filter

“…The relationship between the rebound number and the compressive strength can be represented by the equation (Shang 2012 …”

A Study on Testing Concrete Strength by Inversely Regressed Synthesis Ultrasonic-rebound Method

“…Presently many researches raise multi means to enhance the precision of concrete nondestructive testing [4][5][6][7][8][9][10]. UCM is a widely recognized method now in engineering [11] and it improves rebound method and ultrasonic method to some extent.…”