IS 9103-1979

标准号：IS 9103-1979
发布日期：1979/9/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：1.1 This standard covers the chemical and air-entraining admixtures, solid or liquid or emulsion, to be added to cement concrete at the time of mixing so as to achieve the desired property in concrete, in the plastic or hardened state.1.2 The different types of admixtures covered in this standard are as follows:a) Accelerating admixtures,b) Retarding admixtures,c) Water-reducing admixtures, andd) Air-entraining admixtures.Note 1 — The chloride content in the admixture shall be declared by the manufacturer.Note 2 — Admixtures that contain relatively large amounts of chloride may accelerate corrosion of prestressing steel. Where corrosion of such steel is of major concern, compliance with the requirement of this specification does not constitute assurance of acceptability of the admixture for use in prestressed concrete. In case of reinforced concrete, to minimize the chances of deteriora-tion of concrete, the total chloride content in the concrete should be limited as specified in IS : 456-1978〓..Note 3 — The purchaser should ensure that the admixture supplied for use in the work ia equivalent to the admixture for the purpose indicated, when subjected to the tests under this specification.