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| Wed Jul 18, 2012 | Post #3 | ranvir kumar singh
Join date: May 2012 |  Post subject: construction methodology
After study u r comments i am sure that crack in wall is due to foundation settlement and in ceiling is due to excessive silt or fine sand.
i would like to know about following.
1 How to reduce drying and shrinkage effect.
2 How many day curing require in wall and ceiling slab.
3 how many day shuttering require for ceiling support.
4 how to construct Construction plinth protection. | | |
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| Thu Jul 19, 2012 | Post #4 | S L Gupta (Civil Engg)
Join date: Mar 2008 | Dear Singh
The drying and shrinkage effect can be minimise to use required quantity of cement. Some time mason add extra cement for the reson to enhance the strength but after some limit it will not benifit the structure and excessive cement gives greater drying and shrinkage. If you use more fine material than there is more drying and shirankage.Some time mason add more water in the mix for easy and to save time and labor is one of the main cause of cracking specially in floor. Improper curing is also one of the cause.
Curing for wall masonary should be done at least for 7 days. For Rcc Roof the theoritical curing is for28 days but practically do curing at least for10 days i.e. water should stands on the slab like POND.
At least 7 days shuttering should be kept under horizontal surface in case of slab.
In plinth protection, construct support wall/ toe wall. Than compact the earth with rammer and lay lean cement conc and compact again. Then lay floor with c.conc. 1;2;4 or any other floor finishing as per your choice.Care hould be taken that there is proper slope from building to out side. | | |
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| Fri Jan 01, 2021 | Post #6 | Azhar
Join date: Nov 2020 | Post subject: Azhar
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