QUALITY CONTROL OF

CONSTRUCTION MATERIALS(Water)

by

K. RAMESH

Research Officer,Engineering Materials Laboratory,

A.P. Engineering Research Laboratories,Himayatsagar, HYDERABAD-500030.

Water for concrete

• Water used for mixing and curing of concrete shall be clean and free from injurious amounts of oils, acids, alkalis, salts, sugar, organic materials and other substances that may be deleterious to concrete or steel.

• Potable water is generally considered satisfactory for concrete.

Tests on water• Neutralization

• Organic solids

• Inorganic solids

• Sulphates

• Chlorides

• Suspended matter

• pH value

Permissible limits for solids in water

S.No. Particulars Tested as per Permissible limit, Max

1. Organic IS:3025(P.18) 200mg/l

2. Inorganic IS:3025(P.18) 3000mg/l

3. Sulphates IS:3025(P.24) 400mg/l

4. Chlorides IS:3025(P.32) 2000mg/l for PCC

500mg/l for RCC

5. Suspended matter

IS:3025(P.17) 200mg/l

pH value

• pH value of water shall not be less than 6.