IS 3085 -1965 Code Book PDF free download

IS 3085 -1965 Code Book PDF free download

This Indian Standard was adopted by the Indian Standards Institution on 20 April 1965, after the draft finalized by the Cement and Concrete Sectional Committee had been approved by the Civil Engineering Division Council. Permeability of cement mortar or concrete is of particular significance in structures which are intended to retain water or which come into contact with water. Besides functional considerations, permeability is also intimately related to the durability of concrete, specially its resistance,against progressive deterioration under exposure to severe climate, and leaching due to prolonged seepage of water, particularly when it contains aggressive gases or minerals in solution. The determination of the permeability characteristics of mortar and concrete, therefore, assumes considerable importance. As the test for the permeability of mortar or concrete falls outside the scope of IS : 516-1959* and IS : 1199-19591_ and in view of its great importance, the Sectional Committee took up the formulation of this standard. In the preparation of this standard, due weight age has been given to the need for international co-ordination among standards prevailing in different countries and the practices that are at present being followed in the country in this field. 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 : 2-1960$. 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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