Answer / buntychandwani

First thing the question is not completely and correctely
typed. The stripping stress in concrete in missing and also
how 60 deg temp will be possible in Jammu & Kashmir.
Let us connsider the Stripping stress of concrete as 25 Mpa
and average temp is 6 deg.

Now,

Maturity = Submission (time x temp)
= 15 x 24 x [6 - (11)]
= 6120 deg CH

Plowman's Constant given as A = 21 and B = 61


Se/S 15 = A + B Log10 [ M /1000]

Percentage of strength = 21 + 61 log(6120/1000)
= 68.99

The strength of Concrete at 15 days = 33 x (68.99/100)

= 22.76 Mpa

Since the strength of concrete is less than the stress

Answer / buntychandwani

First thing the question is not completely and correctely
typed. The stripping stress in concrete in missing and also
how 60 deg temp will be possible in Jammu & Kashmir.
Let us connsider the Stripping stress of concrete as 25 Mpa
and average temp is 6 deg.

Now,

Maturity = Submission (time x temp)
= 15 x 24 x [6 - (11)]
= 6120 deg CH

Plowman's Constant given as A = 21 and B = 61


Se/S 15 = A + B Log10 [ M /1000]

Percentage of strength = 21 + 61 log(6120/1000)
= 68.99

The strength of Concrete at 15 days = 33 x (68.99/100)

= 22.76 Mpa

Since the strength of concrete is less than the stress to
which it is likely to be subjectd while stripping the
formwork, the concrete may fail. Therefore, the formwork
cannot be removed at 15 days time.

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