BID Document for Guest House with Boundary Wall.pdf - Integrated ...

The water cement ratio is to be determined by proper slump test or as per provision of relevant I.S. In case of
slump test the slump cones 30 cm. high 20 cm. dia. at bottom and 10 cm. at top are to be kept at site at the
cost of the contractor.
8.3 Finishing:
If the surface of the concrete is found uneven or spongy in the appearance, the contractor will have to rectify
or reconstruct at his own cost.
All R.C.C. work in wall, column, beam, roof, foundation etc., not forming part of water retaining structure
shall be done in M20 grade concrete as per I.S.: 456 with cement content not less than 300 Kg/cu.m. of
concrete. Plasticizer @ 0.2% by weight of cement shall be used. The water cement ratio should not exceed
0.45.
All R.C.C. work forming part of water retaining structure shall be done in M25 grade of concrete as per IS:
456 ;with cement content not less than 350 Kg/cu.m. of concrete. Plasticizer @ 0.2% by weight of cement
shall be used. The water cement ratio should not exceed 0.50.The concrete shall be cured as per I.S.: 456
8.4 Cement and Aggregate:
8.4.1 Cement: The cement shall be OPC, Slag or Pozolana conform to relevant I.S. grade not less 43. Selection of
type and grade of cement shall be approved by the EIC. Cement tests shall have to be carried out at
contractor’s expenses as and when directed. The contractor shall make arrangement with necessary equipment
to carry out crushing strength of 150 cm. Cube concrete block for 7 day’s & 28 day’s of proper curing.
Testing procedure, sample size shall be in accordance with relevant I.S.
8.4.2 Aggregate:
The fine and course aggregates shall conform to relevant I.S. Stone chips and sand for construction work shall
have to be supplied as per clause 3.0 of this specification.
Concrete shall be sampled, analysed tested in accordance with I.S. as furnished in the list.
8.5 Joints in Concrete Structure:
Type of joints, spacing of joints, use of all jointing materials and other features pertaining to the provision of
movement joints in liquid-retaining structures shall be as per relevant I.S. Codes.
8.6 Reinforcement of R.C.C. Works:
The M.S. work should include cutting to sizes, bending, hooking and fabricating including the supply of
B.W.G. wire, and all other works according to specification, drawing or otherwise.
The M.S. reinforcement rods if to be procured by the tenderer shall be HYSD bars (Fe-415) as per relevant IS
Code. The contractor shall intimate the department regarding the quantity of steel to be procured by him in the
works and the same may be supplied at the agreed rate specified in General terms and conditions.
8.7 Clear Cover:
The clear cover to reinforcement shall be maintained as per IS-456-2000 based on the actual exposure
conditions which shall not be less than the followings unless otherwise specified in drawing.
a) Water retaining face 30 mm
b) Other than water retaining face 25 mm for beam and 15 mm for roof and floor
c) Column, Pedestal Foundation and Pile 50 mm
8.8 Lap Length:
The Lap length of reinforcement shall be provided as given below; unless otherwise specified in drawing.
Compression members like column, struts @ 40 times the dia of bar. Tension members like beam, slab,
wall etc @ 50 times the dia of bar.
Following Development length/Anchorage length shall be provided.
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