2013 Volume 69 Issue 2 Pages 138-153
In the test method for estimation of compressive strength of structural concretes by Impact elastic wave method, the velocity of elastic wave is measured and the compressive strength of concrete is estimated from the relational expression which is calculated by relation between the velocity and the compressive strength. In this paper, firstly, to discuss method for calculating the relational expression in structural concretes, the relation between the velocity and the compressive strength in 66 kinds concretes with different mix proportions were investigated. Secondly, to discuss the effect of the measured velocity in established concrete structures, a comparison of various test results was carried out. From the results these experiments, the measuring method for velocity of elastic wave which is applicable to established concrete structures and the correction method for estimated compressive strength of structural concretes were devised. In addition, it was verified that the compressive strengths of structural concretes were estimated within around 15 percent range of error by this devised method.
