Table 3 Proposed conversion functions between cubes and cylinders for UHPC compressive strength.

From: Compressive strength and maturity of UHPC cubes and cylinders: new conversion factors and recommendations for early-age quality control

 

convert 50-mm cubes

to 100-mm cubes

convert 50-mm cubes

to 75-mm cylinders

convert 100-mm cubes to 75-mm cylinders

Function

p-value

R2

Function

p-value

R2

Function

p-value

R2

Linear with intercept

0.8x + 12.1

< 0.001

 < 0.001

0.86

1.1x + 6.2

0.022

< 0.001

0.90

1.3x − 5.7

0.0144

< 0.001

0.94

Linear without intercept

0.90x

< 0.001

0.83

1.10x

< 0.001

0.89

1.20x

< 0.001

0.94

Power function

1.50 × 0.9

0.0352

< 0.001

0.87

1.04 × 1.03

0.733

< 0.001

0.91

0.80 × 1.1

0.0052

< 0.001

0.96

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