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Water for Construction

Wed Mar 31, 2010Total posts : 10
nuwan77
nuwan77
Join date: Mar 2010
Topic: Water for Construction

TO : Mr. S L Gupta (Civil Engg) and Other friends of this forum Dear Sir, This article is very helpful. Thanks so much for posting this. This will be much more useful for me, if you can let me know what is meant by: >> Quantity of Water for One Bag Mix >> # Approximate 32 liters of water is required where the ratio 1:2:4 of cement concrete is used. What is One Bag Mix (please)? Is it one bag of cement(50KG) : 2 bags of sand (same size bag as cement bag) : 4 bags of 3/4" size chip-stones (same size as cement bag) : 32 liters of water? On the other hand how can I identify by observing the qualities/properties of concrete mix and determine my contractor does not mix more water than it is recommended? Thanks in advance for your comments.

The comment above talks about the article   "Water for Construction"
Fri Apr 02, 2010Post  #1
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Post subject: Reply- water for construction

Dear Nuwan,

In the batching/ mixing process, the unit measurement of cement is one bag contains   50 kg cement and 0.035cum  volume . The accurate method of batching should be by weight i.e. 50 kg of cement, 100 kg of coarse sand and 200 kg of coarse aggregate or stone ballast. But on small work weight-batching is not possible than volume batching is done i.e, one bag of cement/ 1.25 cft/ 0.035 cum of cement, 2.5 cft of coarse sand and 5 cft of coarse aggregate which are measured by box of 1’x1’x1.25’ = 1.25 cft. Technically there are three methods for testing water cement ratio i.e. slump test, compacting factor test and Vee- Bee consistency test. But on small work  and in general observation, the mix should be stable there should not be the problem of segregation of material i.e. Coarse Aggregate and cement paste separate from each other, the other problem is bleeding i.e. water or water with cement comes at the surface of the concrete. These both problems create when there is excess water in the mix. The mix should be homogeneous, cohesive and mobile.

Regards
S.L.Gupta
 
Wed Oct 27, 2010Post  #2
Iqbal Naviwala
Iqbal Naviwala

Join date: Oct 2010
Post subject: Water for Construction

I have ground water. Test show PH value 8.9 and TDS 3400. Can I use water for RCC work and CC work or can I use for CC work only?
 
Wed Oct 27, 2010Post  #3
Iqbal Naviwala
Iqbal Naviwala

Join date: Oct 2010
Post subject: Water for Construction

IS:456-20000
 
Wed Oct 27, 2010Post  #4
Iqbal Naviwala
Iqbal Naviwala

Join date: Oct 2010
Post subject: Water for Construction

what is Is:456-2000
 
Sat Oct 30, 2010Post  #5
Ajith
Ajith

Join date: Oct 2010
Post subject: Water for Construction

Amazing and realy worth.
 
Mon Feb 06, 2012Post  #6
sathya
sathya

Join date: Feb 2012
Post subject: Water for Construction

i am planning to buy a house built in a area where the gound water is extremely salty. The builder confirms that only potable water has been used. The building is now complete. How am i to verify what water has been used for building. Is there any possibility of finding. Assuming the builder has used salt water what would be the detrimental effects.
 
Fri Jun 21, 2013Post  #7
Navneet Jharia
Navneet Jharia

Join date: Dec 2010
Post subject: Water for Construction

"The water for construction should be potable water"...but it is not in practice because of UNAWARENESS, THANKS for such an Important Information
 
Thu Jun 12, 2014Post  #8
yoga
yoga

Join date: Jun 2014
Post subject: Water for Construction

For my house construction i had got the groundwater pH 6.8 All parameters were good except'water neutralization to neutralize 100 ml of sample water using phenolpthalein as an indicator 0.02N NaOH (ml)0.6,and To neutralize 100 ml of sample water using mixed indicator using 0.02N H2s04(ml)57.0 max permissible 25. how can i treat the water if not treated what would be the problem kindly help me.
 
Fri Jan 02, 2015Post  #9
Sunayana
Sunayana

Join date: Jan 2015
Post subject: Water for Construction

Thanks for the information provided on this site.It was very helpful.I would be glad to know the remedial measures which can be taken at site.Can we do any treatments if possible incase the water available doesnt meet the requirements?
 

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