Research Article

Optimization of River Sand with Spent Garnet Sand in Concrete Using RSM and R Programming Packages

Table 3

ANOVA response 1: compressive strength at 28 days (Design Expert).

SourceSum of squaresdfMean square value valueRemarks

Model37.72218.86203.5<0.0001Significant
A- river sand34.12134.12368.14<0.0001Significant
B- spent garnet sand0.00000Insignificant
AB5.9315.9363.98<0.0001Significant
A20.00000Insignificant
B20.00000Insignificant
Residual0.9267100.0927
Lack of fit0.926710.9267
Pure error0.000090.0000
Correlation total38.6512