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International Journal of Concrete Structures and Materials

Table 9 Regression analysis of 28-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): 9.91E(−10)

Sample multiple coefficient of determination: R2 = 0.85

 

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

P-value

95% of confidence interval

y-intercept

− 29.275 (MPa)

0.089

(− 63.368; 4.818)

Binder

0.275 (MPa/kg/m3)

2.19E(−7)

(0.197; 0.353)

FA + SF

− 0.93778 (MPa/%)

2.59E(−6)

(− 1.251; − 0.624)

SF

1.231944 (MPa/%)

1.23E(−6)

(0.840; 1.624)

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