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Asked by : Vivek Singh, Project Manager, L&T
Industry : Construction
Activity: Question posted: 06 28 2008 01:55:07 +0000, 14 answers, 27415 views, last activity 11 07 2014 03:15:14 +0000
 
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It is said that one of its role is drainage. But drainage in which direction? Is it from median to shoulder (or otherwise)? or from top to botttom (very less possibility of water to reach GSB from bottom without damaging the top coarses)? or capillary cut off i.e. bottom to top (this will happen only after saturation of Subgrade which is disaster in itself)?

 

 
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Rating : +1 

GSB is a protective layer for Subgrade which works as a drainage layer in certain conditions when all pavements layers are cracked or damaged at that time this layer drain out the water and protect the sub grade from major loss.

                                     Bhartiya khojkarta

                                                                  please give comment on my research



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by   Bhartiya Khojkarta, Freelancer, khoj  | 09 17 2013 12:25:35 +0000
  Answered by     Kumar K, QS&E, KNK Group  | 11 07 2014 03:17:16 +0000
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% age of reduction GSB after compaction 

  Answered by     Selva Kumar, Owner, Contractor  | 10 25 2014 06:49:39 +0000
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witch metal using the GSB

  Answered by     Narendra Gogula, Project Engineer, IIT Madras  | 08 06 2014 11:20:55 +0000
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what is density of GSB??

  Answered by     Bhartiya Khojkarta, Freelancer, khoj  | 09 17 2013 12:28:21 +0000
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difference between grider & joist

  Answered by     Sirish Rooney, student , Hogwarts School of Witchcraft and Wizardry  | 09 12 2013 19:37:29 +0000
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about the base layer can anyone give me information about the base layer?

  • function
  • materials made out of
  • types 
  • advantages 
  • disadvantages

i need this information for my project. REPLAY ASAP.

thank you.

  Answered by     Vijay Kanakdande, DGM, L & T  | 08 03 2011 09:29:30 +0000
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Role of GSB is like a shock absorver 

 

  Answer modified by     naveenkumar Chilakwad, QC INSPECTOR, SGS INDIA PVT. LTD  | 12 27 2010 08:56:58 +0000
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But can we transport the GSB material in dry condition from plant to site? if yes then how can we control the moisture by adding water at site? and if no then wats solution for long distance materials transportation. which is code/Morth section refers regarding the same? Thax please reply

  Answered by     suraj singh, Deputy Project Manager  | 09 02 2008 01:07:13 +0000
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GSB's main roles are:-

   Load bearing/distribution

   Drainage: water find way through GSB voids towards slope under gravitational force. Subgrade, GSB and all pavement layers are constructed always in slope to facilitate drainage. Water may enter from any side during rainy season. Understood subgrade is required to be protected from water and Subgrade(compacted soil) generally being have low permeability, water drains out without affecting much depth of subgrade soil.

   In case water reaches pavement through saturated soil subgrade, then also GSB will provide quick drainage to water and reduce damaging effects of water in soil. 

 

  Answered by     Yogendra Singh Chauhan, Civil Engineer-Highway Roadway, AECOM  | 07 04 2008 23:47:39 +0000
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filter layer will minimise the damages...............

 
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