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Inspection of concreting works is an important step to achieve greater strength and durability of the structure. Although it is easy to remember number of checks during inspection of concrete member, a checklist is always required for record of the placement of concrete and quality control measures taken at site.

Stages of Inspection of Concrete Works

Inspection of concrete is done in 3 stages,

  • Pre-placement
  • During placement
  • Post-placement.

Type of inspection of concrete depends on type of concrete, i.e. PCC or RCC, type of elements to be casted, such as RCC slab, columns, footing, beams, walls etc.  It is both beneficial to contractor as well as engineer to maintain the record of checks, so that they can produce it in case of any discrepancy.

It also allows becomes a proof of quantity of concrete work done by the contractor, so that no discrepancy arises during billing.

The checklist also notes the number of cubes taken for the given work and its id is noted in the checklist, so that when cube test results arrive, it becomes easy to identify the structural elements for the given cube test results.

Concrete Placement Inspection Checklist

Fig 1: Concrete Placement Inspection Checklist

1. Concrete Pre-Placement Checklist

Table 1: Standard Inspection Checklist for pre-placement of concrete.

Sl. NoCHECKLISTREQUIREMENT
1Centre lineAs per drawing
2Formwork & StagingAs per drawing & in exact plum
3Construction joint location*As per drawing
4Steel reinforcement diameter / spacing & coating*As per drawing
5Cover to the reinforcement and overlap*As per drawing
6ShutteringAligned as per drawing and in plumb
7RLs and reference levelsAs per drawing
8Embedment part check, i.e. insert plates, nipple etcAs per drawing
9Placement of water stoppers, if any*
10Location of construction joint
11Water tightness of shuttering, if requiredNo water seepage allowed
12Quality of waterPotable and clean
13Measuring jar for water pouringAs per water content requirement
14Quality of materialsAs per specification

2. Inspection during Placement of Concrete

Table 2: Standard Inspection Checklist during placement of concrete

Sl. NoCHECKLISTREQUIREMENT
1Water cement ratioAs per specification
2Surface preparation by mortar beddingFresh mortar
3Slump testing*As per requirement
4Adequacy of vibration40mm and 60mm needle required
5Segregation of aggregatesNot allowed
6Removal of temporary spacers and ties*To be removed
7Check for shuttering prop displacement / settlementNot Allowed
8Number of cubes taken for testing with identification No.: ________ Id: __________3 No’s for RCC > 6m33 No’s for every 5m3
9Continuity of operationsNo break in between concreting

3. Post placement Concrete Inspection Checklist

Table 3: Standard Inspection Checklist for Post placement of concrete.

Sl. No.CHECKLISTREQUIREMENT
1Observation for honeycombingNot Allowed
2Line and LevelAs per drawing
3Surface finishAs per drawing
4Cracks and air bubblesNot Allowed
5Method of curingAs specified
6Checked for stripping/Removing of formwork support etc. after specified duration of stripping time.YesNoNA
7Checked for position of embedmentYesNoNA
8Repair and finish all surface defects by specification / approved methodYesNoNA
9Surface of part of structure is alright and allowed for subsequent activity / backfillingYesNoNA
10Others, if any

* The above checklist are valid for Reinforced Concrete works only.

Note:

  • All the empty space has to be filled and remarks if any shall be written in remarks column.
  • Date of inspection of pre-concrete, during placement and post-concrete placement shall be noted as these steps may not be performed on the same day.
  • Signature by contractor supervisor and engineer is done after each inspection.

About Gopal MishraVerified

Gopal Mishra is a Civil Engineer from NIT Calicut and has more than 10 years of experience in Civil Engineering and Construction. He is the founder of The Constructor.