IS 9103 : 1999 Concrete Admixtures - Specification

1 Scope

1.1 This standard covers the chemical and air-entrainingadmixtures including superplasticizers, solid or liquid oremulsion, to be added to cement concrete at the time of mixing soas to achieve the desired property in concrete, in the plastic orhardened state.

1.2 The different types of admixtures covered in this standardare as follows:

a) Accelerating admixtures,

b) Retarding admixtures,

c) Water-reducing admixtures,

d) Air-entraining admixtures, and

e) Superplasticizing admixtures.

1.3 The chloride content in the admixture shall be declared bythe manufacturer. SuperPlasticizers are expected to be chloridefree.

1.3.1 Admixtures that contain relatively large amounts ofchloride may accelerate corrosion of prestressing steel, Wherecorrosion of such steel is of major concern, compliance with therequirement of this specification does not constitute assurance ofacceptability of the admixture for use in prestressed concrete. Incase of reinforced concrete, to minimize the chances ofdeterioration of concrete, the total chloride content in theconcrete should be limited as specified in IS 456.

2 References

IS 269 :1989Specification for 33 grade ordinary Portlandcement

IS 383 :1970 Specification for coarse andfine aggregatesfrom natural sources for concrete

IS 456 :1978Code of practice for plain and reinforcedconcrete

IS 516 :1959Method of test for strength of concrete

IS 1199 :1959Methods of sampling and analysis of concrete

IS 2386 : Part 3 :1963 Methods of test for aggregates forconcrete :Part 3 Specific gravity, density, voids,absorption and bulking

IS 3535 :1966Methods of sampling hydraulic cement

IS 6925 :1973Methods of test for determination of watersoluble chlorides in concrete admixtures

IS 8112 :1989Specification for 43 grade ordinary Portland cement

IS 8142 :1976Methods of test for determining setting time ofconcrete penetration resistance

IS 12269 :1987Specification for 53 grade ordinary Portlandcement