Relation between cube strength and water-cement Ratio by weight for fully compacted concrete (portland cement).
Water cement. Cube crushing strength ratio. (kg./sq. cm.)
by weight. 7days. 28days.
0.35 400 530
0.40 350 470
0.45 300 420
0.50 250 370
0.55 220 320
0.60 180 280
0.65 150 250
0.70 130 220
0.75 110 200
0.80 105 180
** Volume of one bag of cement is 0.0347 cum.
** Measuring box to be used at site (Size 35 x 25 x 40 cm.)
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