ASSESSMENT OF STRENGTH IN STRUCTURE OF HIGH-STRENGTH CONCRETE BY BOSS SPECIMEN : Study on soundness evaluation of reinforced concrete structures

Abstract

New method of evaluating the compressive strength of high-strength concrete in structures using BOSS, Broken off Specimens by Splitting Method, was developed. Applicability of BOSS specimen was examined by comparing the compressive strength of specimens taken from a model structure by coring and by BOSS. Effects of water-cement ratio and the sampling height on compressive strength were studied with the variance analysis. It was confirmed that high correlation was found between compressive strengths of BOSS and those of core. Therefore the BOSS strength may be applicable to the prediction of compressive strength of concrete in structures represented by the core strength making use of the proposed formula.