Quality Assurance Handbook for Rural Roads Volume-I - pmgsy

5. SECTION 1100:PIPE CULVERTS
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Quality Assurance Handbook for Rural Roads
SECTION 1200: R.C.C SLAB CULVERTS AND MINOR BRIDGES
SECTION 1400: CEMENT CONCRETE CAUSEWAYS
AND SUBMERSIBLE BRIDGES
5.1 Cross Drainage Works
1. Quality of Materials
(i) Check from the registers of quality control tests, the results of tests on constituents of cement
concrete (coarse and fine aggregates, water and setting time of cement), steel reinforcement,
bricks and stones etc.
(ii) Check the test results on 7 day/ 28 day strength as per Specifications of concrete and
workability of fresh concrete (Slump test) etc. during construction.
(iii) Check the Manufacturers’ Certificates for the physical and chemical test results on cement,
test results on concrete/ hume pipes, bearings and plasticizers where used, sealants etc.
2. Quality of Workmanship
(i) In ongoing projects, check on the time for removal of formwork.
(ii) Check for any damage to concrete members due to settlement of support system.
(iii) Check visually for any honeycombing in concrete.
(iv) For Pipe Culverts:
Check the dia of pipes and defects, if any
Check for inlet and outlet gradients of pipes
Check clear spacing between rows of pipes
Check the thickness of earth cushion over pipes
Check for plumbness in head Walls/ Return Walls.
Check dimensions for bedding of pipes.
(v) Slab Culverts/ Minor Bridges
Check the deck slab for depth and width of carriageway, overall length/ length between
bearings, and camber.
Where quality of any concrete member is in doubt, check for soundness of concrete
after hardening by striking with a 0.5 kg hammer or Schmidt’s Rebound Hammer.
Check the Railings/ Kerbs/ Parapets for the specified dimensions and irregularities
in alignment.