Home -> Forums -> Construction -> Ground work -> RMC for Concrete Playground

RMC for Concrete Playground

Tue Sep 03, 2013Total posts : 3
Jibu
Jibu
Join date: Mar 2013
Topic: RMC for Concrete Playground

Dear Sir, 

Due to contractor inexperience, we are not able to do the Onsite Concrete Mix with alternate panels as recommended by you in  http://www.gharexpert.com/Forum/Concrete-Playground/

Instead,  we are planning to use the easier option of RMC for making the Concrete Playground with a smooth finish.

Khoba Work Completed So Far - Contractor has dug and levelled the ground sloping from 6 inches upto 9 inches. He then placed big 10 inch stones and filled all gaps with medium/small/fine stones & coarse sand. He then compacted the whole thing manually with a Giant Hammer

Can you advise how to go about RMC work please.

1. How much RMC will be required for 83 ft x 29ft x 4inch thick ?

2. Which Grade (M10/M15/M20) of RMC to use and its cost per Cubic Metre

3. What precaution to take for RMC laying, vibration and curing ?

4. How to prevent cracks - ( We have seen in Concrete Roads - they do some sort of cutting lines with machine and filling with tar. Is this required ?)

5. What requires to be done after the RMC is fully cured after 10-15 days

Thanks in advance !!

Thu Sep 05, 2013Post  #1
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear
     The quantity of RMC = 802.33 CFT OR 22.71 CUM
    Use M 20 mix
    Lay the mix uniformly, vibrate the mix and finally dress the top surface according to levels and line and finish it.
The paneling is to be done at least 4-5 length wise and 1 -2 width wise.
Do curing i.e  . water to be filled on the concrete for 10 to 15 days, than after curing use the platform.
 
Wed Sep 25, 2013Post  #2
Jibu
Jibu

Join date: Mar 2013
Post subject: Concrete Leveling and Polishing

We made use of the RMC as per your advice and it has worked out very well. Thank you very much !!!
The slope is perfect, but there are few spots where the concrete leveling is not uniformly done, which has resulted in high and low spots and water is collecting at these spots

Is there any way to do a polish to level the surface into a smooth finish ? 
Can we use the machine which they use to polish mosaic tiles to get a uniform finish and what would be the typical cost per sq ft. ? 
Is this machine called concrete grinder ?

Thanks in advance

 
Thu Sep 26, 2013Post  #3
S L Gupta (Civil Engg)
S L Gupta (Civil Engg)

Join date: Mar 2008
Dear Jibu
         Spots are due to slackness done on the part of mason. If these pot holes you want to repair than roughened the pot holes by chiseling, clean them and cure with  wet gunny bag. After that fillthe pot hole with cement concrete mix 1;1.5;3 using small size bazri.and cured with gunny bags at least for 7 days.
      If you made finishing at the time of laying with Iron float than there is no need of polishing.Now get polishing according to your requirement.
 

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