Important tips for civil Engineers ( Part 3 )

  • THE INITIAL SETTING TIME SHALL NOT BE LESS THAN 30 MINUTES.
  • THE FINAL SETTING TIME SHALL NOT BE MORE THAN 10 HOURS.
  • SAMPLES FROM FRESH CONCRETE SHALL BE TAKEN AND AT LEAST A SET OF 6 CUBES OF 150 mm SHALL BE PREPARED AND CURED. 3 CUBES EACH AT 7 DAYS AND 28 DAYS SHALL BE TESTED FOR COMPRESSIVE STRENGTH. THE TEST RESULT SHOULD BE SUBMITTED TO ENGINEER FOR APPROVAL. IF RESULTS ARE UNSATISFACTORY NECESSARY ACTION/RECTIFICATION/REMEDIAL MEASURES HAS TO BE EXERCISED.
  • WATER CEMENT RATIO FOR DIFFERENT GRADES OF CONCRETE SHALL NOT EXCEED 0.45 FOR M 20 AND ABOVE AND 0.50 FOR M 10 / M 15 CONTRACTOR / MIX DESIGNER TO CARRY OUT THE NECESSARY INITIAL (PRELIMINARY) TESTS. FOR CONCRETE GRADES M 20 AND ABOVE APPROVED ADMIXTURE SHALL BE USED AS PER MIX DESIGN REQUIREMENTS.
  • POURING OF CONCRETE. NO CONCRETING OPERATION SHALL BE CARRIED OUT DURING INCLEMENT WEATHER CONDITIONS LIKE HEAVY RAIN, STORM AND HIGH WINDS
  • ALL REINFORCEMENT SHALL BE FREE FROM MILL SCALES, LOOSE RUST & COATS OF PAINTS,OIL OR ANY OTHER SUBSTANCES.

  • BY PROVIDING PROPER COVER BLOCKS,SPACERS,CHAIRS ETC..ALL REINFORCEMENT SHALL BE PLACED AND MAINTAINED IN POSITION AS SHOWN IN STRUCTURAL DRAWING

  • CEMENT SHALL BE 43 GRADE ORDINARY PORTLAND CEMENT CONFORMING TO IS:8112 OR 53 GRADE ORDINARY PORTLAND CEMENT CONFORMING TO IS:12269-1987.

  • Electrical conduits shall not run in column

  • Earth work excavation for basement above 3 m Should be stepped form

  • Any Back filling shall be compacted 95% of dry density at the optimum moisture content and in layers not more than 200 mm for filling above structure and 300 mm for no structure
  • F SOLING IS SPECIFIED THE SOLING STONES SHALL BE LAID AT 45° TO 60° INCLINATION (AND NOT VERTICAL) WITH INTERSTICES FILLED WITH SAND OR MOORUM.

  • Y REPRESENTS TOR STEEL GRADE – Fe-415 OF IS:1786. WITH CHARACTERISTIC YIELD STRENGTH OF 415 N/MM MINIMUM.

  • BINDING WIRES SHALL BE 16 GUAGE 1.mm SOFT ANNEALED STEEL WIRES FREE FROM RUST AND OTHER CONTAMINANTS.

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