Contrete reaches its full strength in 28 days. Then, why
are we removing shutter in 7/ 14 days?
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Answer Posted / mhbkpr
We cannot deshutter in all type of concrete works. for e.g
footing, plinth, beam sides like we can remove within this.
But roof slab likes we need provide back proping before
removing.
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As per Kandal suggestions, we have implemented rolling starts on 140 (+/- 5) degrees and we kept 3 rollars to complete the rolling before falling 125 degrees and the Aggregate AIV is below 22. But When the DBM bed is being rolled 3rd high viabration, (Before 1 plain & low ,2 high Viabrations), the aggregate is getting sharp edge agg. projections are damaged. As the literature is said that, the VG-30 Grade having better control the temp. susceptibility than Penetration grade. if so we could not get this problem at site. But we are facing on site. let me know.
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