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TYPES OF CONCRETE STRUCTURES INSPECTION

Source: | Updated: May 18, 2016

NEED FOR INSPECTION OF CONCRETE STRUCTURES:

Inspection  is  the  first  step  towards  any  maintenance  programme. The purpose of structural inspection can be classified as under:

i)  To  provide  assurance  that  the  concrete structure is  structurally  safe  and fit for  it’s designed use.

ii)  To  identify  actual  and  potential  sources  of   trouble  at  the earliest possible stage.

iii)  To  record  systematically  and  periodically  the  state  of  the structure.  This  enables  one  to  know  the  time  when  defects occurred  and  to  identify  any  significant  structural  changes like deformation, loss of camber, et c.

iv)  To  provide  necessary  information  on  which  decision  will  be made  for  carrying  repairs,  strengthening,  replacement  in the concrete structure.

TYPES OF INSPECTION OF CONCRETE STRUCTURE:

There  should  be  three  types  i.e.  Routine  inspection,  Detailed inspection and Special inspection

1.  Routine  Inspection:  It  is  the  periodic  examination  of  the  general conditions  of  the  structure competent  and  qualified  engineers. Each  inspection  is  to  be  recorded  in  the  register. It will be primarily a visual  inspection supplemented by  simple  instrumental  aids.   The  inspection  should  be  such  as  to discover  all  indications  of  deterioration/damage  such  as  texture  or colour  of  concrete,  exudation,  cracks,  spalling,  delamination, leaching, rust streaks, deformation, loss of camber, etc.

2.  Detailed  Inspection:  This  is  a  more  intensive  and  thorough inspection  than  the  routine  inspection.  All  parts  are  closely examined,  and  if  necessary,  special  equipments are used for this inspection. Specially  trained  engineers conduct  detailed  inspection.

3.  Special  Inspection:  Special  inspections of concrete structures are  done  in  the event of unusual occurrences  such as:

i)  When  signs  of  weaknesses  discovered  during routine  or detailed inspection or by any other observation.

ii)  When  the  structure loading  is  to be increased due to  revised or increased loading standard.

iii)  Distressed concrete structures.

iv)  When  subsidence  occurs  in  areas  of  mineral  or  coal extraction.

v)  When settlement of foundation takes place.

vi)  When seismic activity takes place.

vii)  In  case  of  exceptional  event s  e.g.   flood,  storm,  fire, accidents, et c.

As  described  above,  special  inspection  is  need-based  and  will  be carried  as  and  when  required.  However,  special  inspection  may require  supplementary  testing  and  structural  analysis  and  may require detailed involvement of a structural engineer.


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