IS 5892 -1970 Code Book PDF free download

IS 5892 -1970 Code Book PDF free download


This Indian Standard was adopted by the Indian Standards Institution on 26 October 1970, after the draft finalized by the Construction Plant and Machinery Sectional Committee had been approved by the Civil Engineering Division Council.  The transit mixer as the name implies, basically consists of a mixer mounted more commonly on a truck, but sometimes on other suitable mobile haulage unit, so that concrete is mixed or agitated during its transit. In view of the increasing use of transit mixers and agitators on heavy construction projects and also in view of the fact that the manufacture of transit mixers has already been started in the country by some of the manufacturers, it has been considered necessary to lay down standards for transit mixers and agitators. This Indian Standard, therefore, has been prepared with the following main objectives: a) To guide the manufacturers and the purchasers by specifying working limits for the capacity, general construction and other features of the machine; b) To assist in efficient production by standardization of the sizes; and c) To guide the purchaser in acquiring machines which meet certain minimum performance requirements.  A transit mixer can perform three functions, that &it can mix a batch of coarse and tine aggregates, cement and water into concrete while it is moving or stationary; it c%n also keep already mixed concrete from segregation during transit by agitation as a result of slow revolution of the drum; it can also completely mix the ‘shrink mixed’ concrete ( that is concrete partially mixed in the central plant) during transit. 1 On the other hand, the transit agitator alone is a comparatively simpler equipment which cannot work as a mixer; if loaded with concrete fully or partially mixed at a central plant, it can prevent segregation of fully mixed concrete or fully mix the partially mixed ‘concrete during transit by agitation as a result of slow rotation of the drum.  Whereas the requirements of the specification have been specifically laid for the transit mixer as described in 0.3, they may also apply with suitable modifications, wherever necessary, to the transit agitator alone as described in 0.3.1. This standard contains clauses which call for agreement between the purchaser and the supplier and also clauses which permit the purchaser to use his option for selection to suit his requirements. The relevant clauses are 3.2 A 9.2 and 11.1.  For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS : Z-1960*. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.



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