Concrete Playground

Dear Jibu

        1. First dress the earth properly and dress it in level and line as per level given by mason. Second step is lay 3''-4'' lean cement concrete 1;8;16 as base coat and copact it by raming with rammer. After that lay cement concrete 1;2;4 ratio topping 2'' to 3'' thick and finish it.

2.It will approximate cost about Rs50-00 per sft.

3.Mason mark the level point for giving proper slope.

4.Lay the top layer i.e. topping in to panneles by using wooden stripus to avoid cracks.

       See the web site gharexpert.com for flooring and also there is lot about construction procss ,materials and interior.See the link given below.

http://www.gharexpert.com/articles/Flooring-1829/Guidelines-Laying-Cement-Concrete-Floor_0.aspx

Thank you Sir for the quick reply and useful information you have provided. I have few more queries on the same topic please

1. My contractor is claiming to dig 12" into the ground .. then fill it with 8" old buildlng debris ... compact the same with hand rammer  .... and then top it with 4" cement. Will this be ok  or do you recomend some alternative ?!

2. Do we need to fill the gaps due to the strips / panels with some tar or anything else the way it is done while concreteing road in the metro

3. Can we mix the top cement layer with some green colour to blend with the grass. Will this affect the cement strength or create cracks in future ?!

4. Which brand of cement would you recommend for this please ?!

5. Will this require steel-rod RCC reinforcements in any way ?!

Many thanx in advance itself !!!!

Dear Jibu

          In my view, excavate the ground 6'' only to Keep the floor at least 2'' high from ground for easy draiage of rain water and lay lean concrete 4'' with broken brick bats compact them but not  fill with debris the next 4'' is cement concrete  1:2:4 ratio.

2. Donot lay glass striups as these are broken in sunrays after some time.Either have zero joint by laying alternative pannels or fillthe gaps with tar etc.

3 you can mix the color but not so effective.

4. use any reputated brand of company made cement.

5. no steel rod required.

Thank you very much foraall your replies Dear Mr. Gupta

Just to confirm that we have understood it right ... Cement Ratio 1:2:4 can be taken as 1 bag of 50kg cement and 2 bags of fine aggregate and 4 bags of coarse aggregate. How much gamelas is normally considered as 1 bag of fine/coarse aggregate ?!

After laying the base lean concreted 1:8:16 and compacting it .... should this be cured for some days before laying the topping of cement concrete 1:2:4

For alternate panels if we take example of chess board ... then first day all the white squares should be filled with concrete and next day the panels should be removed and black squares should be filled ..... is that correct ?!  if yes .. then next day the panels will be required only for the outer edges and not in the centres ... is that correct ?! And how does this prevent cracking for the second day panels because it will have no place to expand / contract ?!

Can you give me the below Hindi->English  & English->Hindi translations so that my local contractor can uderstand the same please. Also anything that we may have missed out please !!!
   Hindi         -> English
1. Rethi    ->
2. Khadi(1 No)   -> ?????
3. Khadi(2 No)   -> ?????
4. Rabit    -> Broken Brick Bats
5. ?????         -> Coarse Aggregate
6. ????          -> Fine Aggregate
7. ????          -> Fine Sand
8. ????          -> Panels
9. ???           -> Strips
10.?????         -> Screeds

Thank you very much in advance itself !!!!

Dear Jibu

   You under stand the meaning of ratio.

    Cure the lean concrete before laying the topping.

Alternate paneling are this as you have stated. There is negligible expanson in cement concrete, donot worry about expanson.

Dear Sir, 

Due to contractor inexperience, we are not able to do the Onsite Concrete Mix with alternate panels as recommended by you.

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 !!