Strengthening of slab or Retrofitting of slab

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[@arshadshaikh5632]

Sir, why dont we provide crank bent up bars in new mesh ...how will it resist negative bending moment if bent up bar is not provided in new mesh ???

[@arshadshaikh5632]

And how can we know if slab is weak by positive bending moment or negative moment

[@AdityaSingh-jn1kw]

Thank u sir for this awesome lecture 🙏

[@civilbasics21]

Thanks

[@firozali4337]

Sir kya aap ka watsapp number milega

[@subhashmedhi386]

Sir, Is there any construction firm based in India specialised in providing such retrofitting services in Guwahati?

[@haiderali-ey5rp]

Sir how to concrete it becuase we have no exposed surface to do it? please guide me

[@civilbasics21]

It can be done by drilling holes in slab from the top at a suitable interval and pouring concrete into holes and using vibrator at the same time from top or bottom side by keeping some steel pannel open.

[@sush6999]

For positive BM strengthening. How to place concrete after steel mesh is installed? Top slab is as it is so how can we pour the concrete at bottom of slab?

[@civilbasics21]

This is typical job but not impossible. This can be done by pumping concrete from bottom. Complete bottom shuttering is not done,it is done in strips.when this strip is poured,another strip is fixed.
Pouring concrete may be done by drilling holes at suitable interval in old slab and pouring fresh concrete by pumping into formwork.

[@sush6999]

Sone Lal Sharma workability of concrete need to be check specifically so that the poured concrete should move horizontally

[@civilbasics21]

Yes, special type of workable concrete is required for it.

[@mcnakum7567]

Can you tell me special type of workable concrete is which one?

[@vinaykumaryadav5267]

​@@mcnakum7567 micro concrete