Evaluation of Ratio between Splitting Tensile Strength and Compressive Strength for Concretes up...

(ProQuest Information and Learning: ... denotes formula omitted.)

The authors' evaluations on the ratio of splitting tensile strength to cylinder compressive strength of concrete as a function of compressive strength in a large scale are appreciated. In this study, it is noted that Eq. (7) is

... (7)

It has recently been shown, however, that the equations for determining splitting tensile strength as a function of compressive strength lose their validity in the condition of external or internal diffusion of chloride to concrete.37,38 It is also shown in Fig. A that Eq. (7) proposed by the authors is not valid for the 72 concrete samples with and without silica fume,39 and 60 concrete samples with and without ground granulated blast-furnace slag under chloride effect.40

In other words, the discusser put the compressive strength values of 132 concrete samples in total into Eq. (7) to predict splitting tensile strength values. It could be seen in Fig. A, however, that experimentally measured splitting tensile strength values (which were published in References 39 and 40) deviate dramatically from the predicted ones found by using Eq. (7) recommended by the authors.

Consequently, in evaluating the quality of concrete and/or reinforced concrete exposed to chloride effect, the empirical equations for the tensile strength consisting only of the compressive strength as a material parameter would not be valid; the tensile strength should be tested separately.

NOTATION

f^sub c^ = cylinder compressive strength

f^sub tsp^ = splitting tensile strength