IS 5891 -1970 Code Book PDF free download

IS 5891 -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 Giant and Machinery Sectional Committee had been approved by the Civil Engineering Division Council. Proper and efficient mixing of concrete is an important factor affecting the quality of concrete and the progress of concrete operations. Thorough mixing of the concrete ingredients would depend to a large extent on the efficiency of mixer. Batch type concrete mixer which b one of the most common type of mixers has been covered by IS : 1791-1968* and IS :4-634 1968 t. Hand-operated concrete mixer may be used with advantage as an efficient substitute for platform n$axing on small building works and on construction jobs where small quantity of concrete is required at a place, such as pedestal foundations for pipe lines and minor repairs in concrete. This equipment has considerably improved performance compare,d to hand mixing on platform. 1 This standard covering hand-operated concrete mixers has been prepared mainly with the following objectives: a) To guide the purchasers in obtaining machine with some minimum guaranteed performance, b) To help the manufacturers and purchasers by laying down working limits for Capacity and other features of machine, and c) To aid in production by limiting the number of standard sizes. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS : Z-1960$. 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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