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CURING ON ROOF CONCRETE

Thu Mar 13, 2014Total posts : 7
K Umapathi
K Umapathi
Join date: Jun 2013
Topic: CURING ON ROOF CONCRETE

Sir,

The roof concrete was finished yesterday evening (12/03/2014)  for my house. I cured the roof completely today morning. By the time, I returned from the office around 5pm, the roof was completely dry. It must have been dry from mid day. Then again I cured it after 6'o clock. I am bit worried as everybody says the concrete should not have been left dry. Will it affect my roof concreting? kindly advice sir. I had used drinking water for complete concreting as well as curing.  Snaps of morning curing attached for your reference.

Thank You sir.

With Regards,
K Umapathi.

Attachments: IMG_0296.JPG on Thu Mar 13, 2014, 
IMG_0297.JPG on Thu Mar 13, 2014, 
IMG_0298.JPG on Thu Mar 13, 2014,&n
Sat Mar 15, 2014Post  #1
Navneet Jharia
Navneet Jharia

Join date: Dec 2010
Post subject: CURING ON ROOF Slab

Dear Mr. K Umapathi, It was left for 3 to 4 hrs. without curing ,don't worry sir , its all okay..The presence of water is essential to cause the chemical action which accompanies the setting of concrete.Normally, there is an adequate quantity of water at the time of mixing to cause hardening of concrete,but it is necessary to retain water until the concrete has fully hardened. As you are using 'Ponding', is a very effective method..the depth of water should be 50 mm  to prevent evaporation...Regards.
 
Sun Mar 16, 2014Post  #2
K Umapathi
K Umapathi

Join date: Jun 2013
Post subject: CURING ON ROOF Slab

Dear Navneet Jharia sir,

Thank you very much for your prompt reply. Your positive answer given me a sigh of relief. Thanks again sir.



With Regards,
K Umapathi.
 
Mon Mar 17, 2014Post  #3
Ahmed
Ahmed

Join date: Aug 2013

Hi sir

How many days we have to do the curing and ponding for the good strength

 
Mon Mar 17, 2014Post  #4
Navneet Jharia
Navneet Jharia

Join date: Dec 2010
Post subject: CURING ON ROOF Slab

Hello..! Ahmed...The curing period for Reinforced Cement Concrete (RCC) slab is 21 days to attain its strength according to Mix of Concrete..Regards

 
Tue Mar 18, 2014Post  #5
Ahmed
Ahmed

Join date: Aug 2013

Tks navneet sir, but when can we remove shutters and sheets used for concrete slab.

Even it has to be for 21 days

 
Tue Mar 18, 2014Post  #6
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008

 Dear Ahmed

       Recommended Period for Removal of Shuttering

  • 48 hours for sides of foundations, columns, beams and walls. 
  • 7 days for underside of slab up to 4.5 meter span
  • 14 days for underside of slab, beams, arches above 4.5 meter up to 6 meter span.  
  • 21 days for underside of beams arches above 6 meter span and up to 9 meter span.
  • 28 days for underside of beams arches above 9 meter span. For more detail see the construction section of gharexpert in which in concrete sub section you wil find the detail of concrete and shuttering. 
 
Wed Mar 19, 2014Post  #7
Ahmed
Ahmed

Join date: Aug 2013
Tks for Mr. Gupta
 

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