GAIL (India) Limited

31d) The mix of concretee) Date and timef) Crushing strength at 7 daysg) Crushing strength at 28 daysh) Any other information directed by the Engineer.3.31.4 Acceptance Criteria for Test CubesThe acceptance criteria of concrete on strength requirement shall be in accordance with the stipulationsunder clause 15 of IS:456.3.31.5 Non-destructive Tests on Hardened ConcreteIf there is doubt about the strength or quality of a particular work or the test results do not comply withthe acceptance criteria as stipulated under clause 15 of IS:456, non-destructive tests on hardenedconcrete like core tests and/or load tests or other type of non destructive tests like ultrasonic impulsetest etc. shall be carried out, as may be directed by the Engineer, by the Contractor at entirely his owncost.The core tests and load tests shall comply with the requirements of clause 16.6 of IS: 456 shall beapplicable.3.31.6 Concrete Below Specified StrengthIn case of failure of test cubes to meet the specified requirements, the Engineer may take one of thefollowing actions:1. Reject the work and instruct that section of the works to which the failed cubes relate shall becut out and replaced at the Contractor's expense.2. Instruct the Contractor to carry out additional tests and/or works to ensure the soundness ofthe structure at the Contractor's expense.3. Accept the work with reduction in the rate in appropriate item.3.31.7 Concrete failed in Non-destruction TestsIn case test results of the core tests or load tests in a particular work do not comply with requirements ofrespective clause (16.3 for core test and 16.5 for load tests) of IS 456, the whole or part of the work concernedshall be dismantled and replaced by the Contractor as may be directed by the Engineer no extra cost to GAIL(INDIA) LTD., and to the satisfaction of the Engineer. No payment for the dismantled concrete includingrelevant form work, reinforcement, embedded fixtures etc. shall be made. In the course of dismantling if anydamage occurs to the adjacent structure or embedded item, the same shall be made good, free of charge by theContractor, to the satisfaction of the Engineer.3.32 EXPANSION JOINTS3.32.1 GENERALExpansion joints shall be provided where shown on the drawings or as directed by Consultant. They shallbe constructed with an initial gap between the adjoining parts of the works of the width specified in thedrawings.The contractor shall ensure that no debris is allowed to enter expansion jointsExpansion joints shall be provided as per drawings.Contractor shall ensure that expansion joints are made water-tight and that no leakage occurs throughthese joints for which he shall be responsible to redo at his own cost.3.32.2 OPEN JOINT FILLERSWhere shown on the drawings, open joints in the structure shall be filled with joint fillers.