Table 4 Regression statistics of the calibrated models.

From: Designing sustainable cement free compositions with rice husk ash to improve mechanical performance in next generation ecoblocks

 

Ultimate stress

Young modulus

Yield stress

Plastic work

 

Lineal model

Quadratic model

Lineal model

Quadratic model

Lineal model

Quadratic model

Lineal model

Quadratic model

Multiple R

0.763

0.879

0.121

0.236

0.816

0.884

0.755

0.812

R square

0.582

0.773

0.015

0.056

0.666

0.781

0.571

0.660

Adjusted R square

0.547

0.732

−0.067

−0.116

0.638

0.742

0.535

0.598

Standard error

0.328

0.252

30.9

31.6

0.250

0.211

0.052

0.048

Observations

14

14

14

14

14

14

14

14

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