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REQUEST FOR HELP TO DESIGN OF CONCRETE PAVEMENT WITH AMERICAN OR BRITISH STD

 
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nestlejin
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Joined: 16 Jul 2010
Posts: 22

PostPosted: Mon Jun 25, 2018 6:48 am    Post subject: REQUEST FOR HELP TO DESIGN OF CONCRETE PAVEMENT WITH AMERICAN OR BRITISH STD Reply with quote

Dear Sefian;
I am involved in one of the assignment of Concrete Pavement design with below data (customer/client requirement) and request your help on this regards;


  1. Show design calculations that road is sufficient to resist a minimum standard vehicle with a 13 tonne axle load under a 7.5 bar tire pressure;  that the road has  sufficient capacity for the load of a vehicle transporting transformers (Total Weight of transformer = 143 Ton whereas Transport weight = 100 Ton).  
  2. Settlement should also be checked.
  3. Indicate traffic load on the drawing .

If you can help me with some design example/spreadsheet then its great help to me.

Your immediate response on subject matter, highly appreciated.

Regards
NSJ
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SATYAPAUL
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Joined: 18 Sep 2008
Posts: 119

PostPosted: Mon Jun 25, 2018 1:30 pm    Post subject: design of concrete pavement Reply with quote

please refer to AASHTO code for design of concrete pavement.the design is not dependent on total  load.it is based on axle load.the three condition shall be checked. 1)axle wheel load one meter from corner. 2) axle wheel load acting on middle of concrete slab, 3)axle wheel load acts at edge of slab above condition shall be met with. M40 GRADE CONCRETE(40N/MM2) FOR 28 DAYS CUBE STRESS SHALL BE USED. 150mm thick dry lean concrete shall be used as base course, if it is not on rocky area.(m10 grade conc.  shall be used) use steel fiber reinforced concrete 25kg per cubic meter of concrete to arrest shrinkage cracks.use  super plasticizer 1 % in cold climate and 2% in country like middle east.concrete shall always be laid  when atmospheric temp. is 27 degree centigrade or below 27 degree Cent. my experience i can say dry lean conc. shall be 150 mm thick. and PQC 400 MM FOR HIGHEST AXLE LOAD  PERMITTED IN u.s.a. otherwise provide full detail of earthwork(density and CBR value) this information is enough to help you to design.country's annual mean temperature is equally  important. regards satya pal

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nestlejin
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Joined: 16 Jul 2010
Posts: 22

PostPosted: Wed Jun 27, 2018 4:31 am    Post subject: Thanks for your information Reply with quote

Dear Sir;
Thanks for your information.
Could you please suggest me how to convert given load to axle load?
and what is the significance for wheel pressure 7.5 bar mentioned in my post.
also would like to know, how we can calculate / determine settlement in rigid pavement. As i know there is field test known Benkelman Deflection method which not co relate in design calculation.
Sir; if you have any ready reference example then please let me know or simply you can attached here.

Regards;
NSJ
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nestlejin
SEFI Regulars
SEFI Regulars


Joined: 16 Jul 2010
Posts: 22

PostPosted: Thu Jul 05, 2018 8:14 am    Post subject: Re: Thanks for your information Reply with quote

Dear Engineers;
Your help in designing of Rigid Pavement highly appreciated.

nestlejin wrote:
Dear Sir;
Thanks for your information.
Could you please suggest me how to convert given load to axle load?
and what is the significance for wheel pressure 7.5 bar mentioned in my post.
also would like to know, how we can calculate / determine settlement in rigid pavement. As i know there is field test known Benkelman Deflection method which not co relate in design calculation.
Sir; if you have any ready reference example then please let me know or simply you can attached here.

Regards;
NSJ
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