IS 3558 -1983 Code Book PDF free download
This Indian Standard ( First Revision) was adopted by the Indian Standards Institution on 24 February 1983, after the draft finalized by the Construction Plant and Machinery Sectional Committee had been approved by the Civil Engineering Division Council. Consolidation of concrete by vibration has almost completely revolutionized the concept of concrete technology, making possible the use of low slump stiff mixes for economic production of‘ vigil quality concrete with required strength and impermeability. The use of vibration may be essential for the production of all good concretes particularly where the reinforcement is congested or where to produce quality concrete. Vibration IS often adopted to improve the compaction and strength of concrete. In this way vibration can, antler illimitable conditions, produce better quality concrete than by hand compaction, or by permitting lower cement content and lower water/ctn ratio, produce equally ‘strong concrete more economically than by hand compaction. While vibration properly applied is a great step forward in the production of quality concrete, it dis also employed as a method of placing ordinary concrete more easily than as a method of obtaining high grade concrete at an economical cost. All the potential advantages of \,vibration can be fully realized only if proper control is exercised in the lesion an d manufacture of concrete and certain rules are observed regarding proper use of different types of vibrators. This code covers the use of immersion type concrete vibrators and is intended to give guidance in obtaining maximum benefit from the technique of vibration with immersion vibrators.This standard was first published in 1966. Based on the work done at Central Building Research Institute, Doorkeeper the frequency of vibration has been redefined and a service log book for flexible shaft. vibrators has been included. Also, the maximum thickness of concrete layer, that can be complected, and vibration time for optimum compaction has been specified in this revision. X Essential requirements regarding the quality and manufacture of concrete suitable for vibration have been covered but detailed methods for the actual design of concrete mixes have not been included, these being beyond the scope of this code.In the formulation of this standard due weight age has been given to international co-ordination among the standards and practices prevailing in different countries in addition to relating it to the practices n the field in this country. 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 : 2-1’360”. 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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