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International Journal of Concrete Structures and Materials

Table 8 Regression analysis of 7-day compressive strength.

From: Mass Concrete Placement of the Offshore Wind Turbine Foundation: A Statistical Approach to Optimize the Use of Fly Ash and Silica Fume

P-value (F test): 4.09E(-11)

Sample multiple coefficient of determination: R2 = 0.89

 

y-intercept (βo) and the linear regression coefficients (β1, β2, β3)

P-value

95% of confidence interval

y-intercept

− 66.938 (MPa)

0.0003

(− 99.486; − 34.390)

Binder

0.330556 (MPa/kg/m3)

4.07E(−9)

(0.256; 0.405)

FA + SF

− 0.86 (MPa/%)

4.65E(−6)

(− 1.159; − 0.561)

SF

1.454167 (MPa/%)

3.94E(−8)

(1.080; 1.828)

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