PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

1.11 Roof and roof treatment.
R.C.C. roof slab of M 25 grade concrete of adequate thickness shall be constructed.
The roof shall be treated with water proofing treatment as per CPWD specification
and as per direction of E.I.C.
40 mm thick fine dressed stone flooring over 20mm (average thickness) base of
cement mortar (1:2 proportion; 1 cement and 2 stone dust.) with an admixture of
pigment shall be added.
1.12 Snowcem washing.
The Raw water pump house shall have two coat of snowcem wash of approved
shade over a coat of cement primer including preparing the plastered surface
smooth with sand paper, scaffolding, centering etc. all complete as per building
specification.
1.13 Moorum.
Moorum shall be of the best quality free from clay and must not be too brittle when
dry nor too sticky when wet.
1.14 Jhama metals (for road works).
Jhama metals shall be obtained from uniformly vitrified and heavy picked Jhama
brick bats. The colour of jhama metal shall be Copper red to black and shall not be
spongy or with any coating of foreign materials. The jhama metals shall be more or
less cubical in shape and size shall be well graded in between 90 mm to 45 mm.
1.15 Stone Aggregates (for road works).
Stone aggregates for road work shall be hard, clean, uniform and fine texture. These
must be free from loam, clay or any surface coating, and free from organic matter
and other impurities. Stone aggregates shall be well graded and size between 63 mm
to 45 mm.
The quality and size of all road metals shall be approved by EIC.
GTS : General Technical Specification. Page 14