Thank you for your detailed reply. this is prevention before rain start but incase i just finished casting of RCC (Reinforced Cement Concrete Slab) and heavy rain will fall on it then what can can be done? If i will not cover it then it will wash out? or i can do something after rain will stop to save it?

Thank you again.

Santal

Hi,

I am new to this foram and hope that i am posting the question at right place.

Just after casting a RCC ( Reinforced Cement Concrete ) Slab if it is attacked by a severe rain fall then what remedy measure can be taken to prevent damage to it.

Please guide me.

Thanks,

Santal

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6th October 2007 23:06

johngateley

Registered: Apr 02

Location: Wigan - England

Posts: 506

You'll have to cover the slab with waterproof sheeting & allow for ventilation & run off.

After that you can consider paddle floating while adding a waterproofing agent to the skim coat.

If the rain is heavy it will eventually erode the concrete to expose the rebar whatever you do. Surface finish & additives do help but the fact remains that concrete suffers badly from weathering. Its a composite: so if the weather is hot the rebar expands & flakes off the cover; if its cold the frost cracks the rebar off. But we Perthevere in Western Australia; like everywhere elthe. ■