Inspection Checklist for Concrete Placement

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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.

1. Concrete Pre-Placement Checklist

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

Sl. No	CHECKLIST	REQUIREMENT
1	Centre line	As per drawing
2	Formwork & Staging	As per drawing & in exact plum
3	Construction joint location*	As per drawing
4	Steel reinforcement diameter / spacing & coating*	As per drawing
5	Cover to the reinforcement and overlap*	As per drawing
6	Shuttering	Aligned as per drawing and in plumb
7	RLs and reference levels	As per drawing
8	Embedment part check, i.e. insert plates, nipple etc	As per drawing
9	Placement of water stoppers, if any*
10	Location of construction joint
11	Water tightness of shuttering, if required	No water seepage allowed
12	Quality of water	Potable and clean
13	Measuring jar for water pouring	As per water content requirement
14	Quality of materials	As per specification

2. Inspection during Placement of Concrete

Table 2: Standard Inspection Checklist during placement of concrete

Sl. No	CHECKLIST	REQUIREMENT
1	Water cement ratio	As per specification
2	Surface preparation by mortar bedding	Fresh mortar
3	Slump testing*	As per requirement
4	Adequacy of vibration	40mm and 60mm needle required
5	Segregation of aggregates	Not allowed
6	Removal of temporary spacers and ties*	To be removed
7	Check for shuttering prop displacement / settlement	Not Allowed
8	Number of cubes taken for testing with identification No.: ________ Id: __________	3 No’s for RCC > 6m33 No’s for every 5m3
9	Continuity of operations	No break in between concreting

3. Post placement Concrete Inspection Checklist

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

Sl. No.	CHECKLIST	REQUIREMENT
1	Observation for honeycombing	Not Allowed
2	Line and Level	As per drawing
3	Surface finish	As per drawing
4	Cracks and air bubbles	Not Allowed
5	Method of curing	As specified
6	Checked for stripping/Removing of formwork support etc. after specified duration of stripping time.	Yes	No	NA
7	Checked for position of embedment	Yes	No	NA
8	Repair and finish all surface defects by specification / approved method	Yes	No	NA
9	Surface of part of structure is alright and allowed for subsequent activity / backfilling	Yes	No	NA
10	Others, 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.