Unformatted text preview: m+
80 mm 90 to 100
IO Large, 80 to 40 mm 80 mm
41) mm 90 to 100
Oto 10 Medium, 4Omm
20 mm 90 to 100
10 20 mm
2136 mm 9O‘to 100
2 40 to 20 mm Small, 20 to 4.75 mm *There
complying 5. being no IS Skzve having an aperture larger than 100 mm a perforated plate
with IS : 2405-1963 and having a square aperture of 160 mm may be used. SAMPLING AND TESTING 5.1 Sampling-The
method of sampling shall be in accordance
IS : 2430-1969.
The amount of material required for each test shall be as
specified in the relevant method of test given in IS : 2386 (Part I)-1963
IS : 2386 ( Part VIII )-1963.
5.2 All tests shall be carried out as described in IS:2386
Unless otherwise stated in the enquiry or
to IS : 2386 (Part VIII)-1963.
order, duplicate tests shall be made in all cases and the results of both
5.2.1 In the case of all-in-aggregates,
for purposes of tests to verify its
with the requirements
given in Table 1, and when necessary
for such other tests as required by the purchaser, the aggregates shall be
first separated into two fractions, one finer than 4*75-mm IS Sieve and the
other coarser than 4*75-mm IS Sieve, and the appropriate
tests shall be
made on samples from each component,
the former being tested as fine
aggregate and the latter as coarse aggregate.
5.2.2 If further confirmation
as to the satisfactory nature of an aggregate is required, tests may be made in accordance
with 2 and 5 of
IS : 516-1959 with a view to comparing the properties of the concrete made
with the aggregate under consideration
with those of concrete made with
an- aggregate of known quality.
10 IS : 303 -1970
TABLE 4 FINE AGGREGATES’ ( Clause 4.3 )
r--- _____ PASSINQ FOR .-.-----~ ---__--___h------- Grading
zone I GradinS
Zone 11 Grading
Zone IV Grading
Zone III 10 mm 100 100 4.75 mm 90-100 90-100 90-100 95-100 2.36 mm 60-95 75-100 85-100 95-100 1.18 mm 30-70 55-90 75-100 90-100 600 micron 15-34 35-59 60-79 80-100 300 micron 5-20 8-30 12-40 15-50 150 micron O-10 O-10 O-10 o-15 100 100 NOW b--For
crushed stone sands, the dermissible
limit on 150-micron
IS Sieve is
to 20 percent.
This does not affect the 5 percent allowance
to other sieve sizes.
with the requirements
of any grading
this table is &table
for concrete but the quality of concrete produced
will depend upon
a number of factors including
proportions. Nc)TI’: 3 - Where concrete
of high strength
and good durability
to any one of the four grading
zones may be used, but the
concrete mix should
ne aggregate grading
finer, that is, from Grading
Zones I to I $ the ratio of fine aggregate
should be progressively
Tie most suitable
fine to coarse
ratio to be used for any particular
mix will, howevQer, depend upon the actual gi...
View Full Document
This document was uploaded on 10/01/2013.
- Fall '13