Table 7 Standard deviation and coeffiecient of variation of compressive strength results (MPa).

From: A step towards sustainable glass fiber reinforced concrete utilizing silica fume and waste coconut shell aggregate

Mix ID

7 days

28 days

Standard deviation

Coefficient of variation

Standard deviation

Coefficient of variation

Control

0.655744

6.071702

0.3

1.369863

Mix 1

0.351188

2.94292

0.360555

1.547447

Mix 2

0.404145

2.635729

0.378594

1.543182

Mix 3

0.251661

1.495017

0.264575

1.013698

Mix 4

0.378594

3.957427

0.493288

2.487168

Back to article page