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SITE CONCRETE <br />Section 03000 <br />15-1207 <br />3.11 DEFECTIVE CONCRETE <br />A. Determination of defective concrete shall be made by the Architect or Engineer. His opinion <br />shall be final in identifying areas to be replaced, repaired or patched. <br />B. The Owner reserves the right to survey the flatwork, if it is determined to be outside of the <br />maximum tolerance for flatness. If the flatwork is found to be out of tolerance, then the <br />Contractor will be required to replace concrete. The Contractor will be responsible for <br />reimbursing the Owner for any surveying costs incurred. Determination of flatwork flatness, <br />surveying and any remedial work must be completed far enough in advance so that the <br />project schedule is maintained, delays are avoided and the new flatwork or flatwork repairs <br />are properly cured. <br />C. As directed by Architect, cut out and replace defective concrete. All defective concrete shall <br />be removed from the site. No patching is to be done until surfaces have been examined by <br />Architect and permission to begin patching has been provided. <br />D. Permission to patch any area shall not be considered waiver of right, by the Owner, to require <br />removal of defective work, if patching does not, in opinion of Architect, satisfactorily restore <br />quality and appearance of surface. <br />E. Defective concrete is: <br />1. Concrete that does not match the approved mix design for the given installation type. <br />2. Concrete not meeting specified 28 -day strength. <br />3. Concrete which contains rock pockets, voids, spalls, transverse cracks, exposed <br />reinforcing, or other such defects which adversely affect strength, durability or <br />appearance. <br />4. Concrete which is incorrectly formed, out of alignment or not plumb or level. <br />5. Concrete containing embedded wood or debris. <br />6. Concrete having large or excessive patched voids which were not completed under <br />Architect's direction. <br />7. Concrete not containing required embedded items. <br />8. Excessive Shrinkage, Traverse cracking, Crazing, Curling; or Defective Finish. <br />Remove and replace if repair to an acceptable condition is not feasible. <br />9. Concrete that is unsuitable for placement or has set in truck drum for longer than <br />90 minutes from the time it was batched. <br />10. Expansion joint felt that is not isolating the full depth of the concrete section, and <br />recessed as required for backer rod and sealant where required. <br />11. Concrete that is excessively wet or excessively dry and will not meet the minimum <br />or maximum slump required per mix design. <br />12. Finished concrete with oil stains from equipment use, and or rust spots that <br />cannot be removed. <br />13. Control joints (weakened planed joints) that do not meet the required minimum <br />depth shown on the drawings. <br />F. Patching: Install specified Patching Mortar per manufacturer's recommendations. <br />REPAIRS TO DEFECTIVE CONCRETE WHICH AFFECT THE STRENGTH OF ANY <br />STRUCTURAL CONCRETE MEMBER OR COMPONENT ARE SUBJECT TO <br />APPROVAL BY THE ARCHITECT AND DSA. <br />12 <br />