3. CONCRETE WORK

1. Testing-
   All concrete shall be tested in accordance with specification clauses and the Contractor shall allow for all costs and charges involved in sampling and testing. He shall maintain on site in good order and condition, all equipment necessary for taking of slump and compression test specimens. Laboratory tests shall be carried out by an organization acceptable to the Employer and the Contractor shall be responsible for making arrangements to submit test samples to the testing organization and obtain reports and submit same to the Employer.
   
   
2. Ready Mixed Concrete-
   Ready mixed concrete manufactured and delivered to the site by an organization of repute acceptable to the Employer will be permitted. The Contractor shall give all details such as place of purchase, time in transport, admixtures, etc and obtain prior approval of the Employer before orders are placed.
   
   
3. Curing-
   All concrete surfaces shall be effectively protected from rain until a hard set has occurred. All necessary materials for the protection and curing shall be on the site, before any mixing or delivery of concrete to the site.
   
   
4. Surface finish-
   The Contractor shall provide formwork appropriate to the required formed finish and to the dimensional tolerance given by the Employer.
   
   All concrete surfaces not exposed in the finished work, including substructure and concrete surfaces to be subsequently plastered, shall be of "Basic Formed Finish" as mentioned in the clause specifications.
   All other concrete surfaces that will not be plastered but will be painted shall have a "Plain Formed Finish" as mentioned in the clause specifications.
   
   
5. Concrete surfaces in areas specified by the Employer that will remain unplastered and unpainted, shall have a "Fine Formed Finish" as mentioned in the clause specifications.
   
   
6. Rates for concrete work shall include for :
   
   1. Mixing, deposition, handling, and hoisting into position.
   2. Packing and tamping around reinforcement including vibrating.
   3. Finishing to slopes and falls and prepare surface ready for screeds or paving where necessary.
   4. All necessary expansion joints or sealers including cutting to sizes and temporary supports, required to form necessary grooves, if not measured separately.
   5. Curing as specified and stop pour construction joints etc.
   6. Cutting or forming chases, rebates, and grooves, forming holes and subsequently making good around pipes, sleeves, conduits, ducting metal sections and fittings and for forming all holes or openings.
   7. All necessary shuttering to edges of blinding concrete
      
      
7. Rate for reinforcements shall include for straightening as necessary, cutting to length, bending as required, hoisting to any height and fixing in foundations, columns, beams, slabs, stair cases, and any other position, cleaning, etc., and supporting in position during concreting including all necessary supports, except special chairs and spacer bars, including stirrups and links, steel binding wire and approved distance pieces.
8. Rates for formwork shall include for:
   
   1. General formwork, working in narrow widths and small quantities, for setting up, strutting and supporting at any height, together with any necessary strutting and supporting through lower floors, coating with form releaser, easing, striking and removing, cleaning, preparing for reuse, and removal when no longer required, including all props, stays, struts, wedges and bolts, all overlaps and passing at angles and labours at intersections, rubbing and making good the surface of the concrete after removal of the shuttering.
   2. All fillets to form grooves, rebates, and throats, splays or chamfers, raking, circular cutting, cutting around all pipes, sleeves, conduits, ducting metal and sections, and fittings.
   3. Providing samples as required by the Employer of different formed finishes specified.
      

NOTE :-
No payment shall be made when face of bricks, concrete, and rubble, etc. are used as formwork.

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