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

Hand railing of parapets and elevated floor of the Electrical panel shall be painted
with two coats of approved synthetic enamel paint over a coat of zinc chromate.
All other steel surfaces shall have two coats of synthetic enamel paint over a coat of
priming as specified by the manufacturer of the paint.
The make, shade and color of the paints shall have to be approved by the Engineerin-charge
before use.
Water.
The water to be used in making and curing of concrete, mortar etc. shall be free
from objectionable quantities of silts, organic matter, injurious amount of oils,
acids, salts and other impurities etc. as per IS-456-1978.
The Engineer-in-charge or his authorized representatives will determine whether or
not such quantities of impurities are objectionable.
Such comparison will usually be made by comparison of compressive strength,
water requirement, time of setting and other properties of concrete made with
distilled or every clean water and concrete made with the water proposed for use,
Permissible limit for solids when tested in accordance with I.S. 3025-1964 shall be
as tabulated below:
1. Organic Permissible limit for solids maximum permissible limit 200
mg/litre.
2. Inorganic 3000 mg/litre.
3. Sulphate (As So 4) 500 mg/litre.
4. Chloride (As CI.) 2000 mg/litre for P.C.C and 1000 mg/litre for R.C.C. work
5. Suspended matter 2000 mg/litre.
If any water to be used in concrete, suspected by the engineer-in-charge/or his
authorized representative of exceeding the permissible limits of solids, samples of
water will be obtained and get it tested by Engineer-in-charge in accordance with
IS- 3025-1964.
Cement Concrete.
The concrete shall consist of an aggregate of the proportion by volume defined in
relevant schedule item or work. Only measured quantity shall be used.
GTS : General Technical Specification. Page 8