Nitto CTS-02V4, Руководство пользователя

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Nitto Construction
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Regarding estimation of strength, the relationship between the mechanical impedance index
value and the elastic coefficient of the concrete is shown in the following Equation (3.5).
N
aZ E

(3.5)
Here, a is a constant number and N is used as 4 if the elastic coefficient is unchanged at NDT
range of strain and at the end (breaking time) or 3 in the case of the normal concrete in
taking account the reducing rate of the elastic coefficient. The constant number a depends on
the maximum strain amount of the concrete. In the case of the concrete that is led the
compressive breakdown at 2250
μ strain, the calibration value in the parameter will be about
10-12.