01-06-2012, 11:46 AM
METHODS OF TEST FOR AGGREGATES FOR CONCRETE
Method of test for aggregate for concrete.PDF (Size: 1.07 MB / Downloads: 409)
FOREWORD
0.1 This Indian Standard (&rt I) was adopted by the Indian Standards
Institution on 22 August 1963, after the draft finalized by the Cement
and Concrete Sectional Committee had been approved by the Building
Division Council.
0.2 One of the major contributing factors to the quality of concrete is
the quality of aggregates used therein. The test methods given in this
standard are intended to assist in assessing the quality of aggregates. In
a given situation, for a particular aggregate, it may not be necessary to
assess all the qualities and therefore it is necessary to determine beforehand
the purpose for which a concrete is being used and the qualities of
the aggregate which require to be assessed. Accordingly, the relevant
test methods may be chosen from amongst the various tests covered in
this standard. For the convenience of the users.
DETERMINATION OF MATERIALS FINER THAN 75-MICRON
3.1 Object - This method of test deals with the procedure for determining
the total quantity of material finer than 75micron IS Sieve in
aggregates by washing.
NOTE - Clay particles that are dispersed by wash water as well as water
soluble materials will be removed from the aggregate during the test.
3.2 Apparatus - The apparatus shall consist of the following:
a) Balance -The balance or scale shall be of sufficient capacity
and sensitivity ( see 3.3.1 and 3.4.1 ) and shall have an accuracy
of 0.1 percent of the weight of the test sample.