pqcp-06.03.09 concrete crack repair

7/30/2019 PQCP-06.03.09 Concrete Crack Repair

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KAMCOContracting Division

DOCUMENT TITLE

QUALITY CONTROL PROCEDURE FOR:CONCRETE REPAIRS

DOCUMENT NO.:PQCP-06.03.09

INDEX

1.0 Purpose

2.0 Scope

3.0 References

4.0 Definitions

5.0 Procedure

6.0 Documentation

0 16/03/2008

Initial Issue AP CSUB

ISSUENO.

ISSUEDATE

DESCRIPTION PREPAREDBY

CHECKEDBY

APPROVEDBY

1.0 PURPOSE

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1.1 This method statement describes steps to be followed before and after,the activities/operation of repair works to be carried out on(honeycomb, cracks, etc.) concrete surface prior to application of theprotective coating on it.

2.0 SCOPE

2.1 All concrete works repairs, which are having major & minor honeycomb,fine cracks.

3.0 REFERENCES

3.1 Construction Specification and Design Drawings.

3.2 SES B51 S01 Cast-in Place Reinforced Concrete

3.3 000-10S-0006 Plain & Reinforced Concrete Specification

3.4 C-06.00.01 Inspection & Test Plan for Civil Works PART-1

4.0 DEFINITIONS

4.1 None

5.0 PROCEDURE

5.1 Responsibilities

5.1.1 The Civil Supervisor and/or Foremen are solely responsible forarranging the required temporary works, materials andinstallation works.

5.1.2 The QC Civil Inspector shall ensure that approved quality controlprocedure is implemented. He shall coordinate with ClientRepresentative regarding inspection and testing activities.Documentation of all inspection and tests made shall also be hisresponsibility.

5.2 Tools

5.2.1 Hand held tools.

5.3 Construction Materials5.3.1 The material to be used for the repair of major & minor

honeycomb, fine cracks, spalls, etc. shall be degauss (MBT)product "CONCRESSIVE 2200" which is high strength, non flow,

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epoxy bedding and repair mortar. For more details, please refer

attached Data Sheet for above product.

5.4 Applicable Standards

The Above product complies with the International Industrialapplicable Standards, like ISO 9001, ISO14001 and OHSAS 18001.Repair will be done as per Para. 7.17 of SES Cast-in-placereinforced concrete -SES-B51-S01 REV. 3.

5.5 Repair Works Execution

The following procedure shall be followed while repair of underground concrete surface:

5.5.1 The concrete surface shall be inspected after removal of forms tocheck the depth and size of repair to be done.

5.5.2 The concrete surface shall be made free of oil, grease, and allloose particles using hard brush & dry cloth.

5.5.3 After the surface is fully dry, surface shall be made smooth &plane by filling all honeycombs, irregularities & holes usingapproved two component epoxy mortar (CONCRESSIVE 2200)using scrappers/ steel trowel. Trowel can be dipped in solvent to

make the mortar more workable.

5.5.4 For proper mixing of one pack (3kg) trowel can be used but incase more packs to be mixed at a time it shall be mixed usingelectric drill fitted with paddle. The mix shall be used within 1hour and 45 minutes at 25C and 45 minutes at 40C.

5.5.5 Finished surface can be made smooth by using paintbrush dippedin cleaning solvent No. 2.

5.5.6 After 24 hours (min. 7 hours for tack-free) when the surface hascompletely dried, sand, clean the surface prior to apply primercoat(NITOPRIME 31)

6.0 DOCUMENTATION

6.1 Concrete Repair Checklist- C137Ar.

*****

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pqcp-06.03.09 concrete crack repair

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