Mix design 1
29
MIX DESIGN: CONCRETE PROPORTIONING OF CONCRETE
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Transcript of Mix design 1
MIX DESIGN: CONCRETEPROPORTIONING OF CONCRETE
Left 50%
Right50%
NORMALISED DISTRIBUTION
95%
5%
DesignSD depends on QC
5% 2%1.65 XX>1.65
5% 10%1.65 XX<1.65
Tm = fck + Kσ
VALUES OF K
Percentage of result below the
Characteristic strength
K
50 016 1.010 1.285 1.65
2.5 1.961.0 2.330.5 2.580.0 Infinity
(w/c ratio )1 > (w/c ratio )2
s/a =0s/a =1
The end