12-11-2014, 08:39 AM
Specifications for Flakiness & Elongation Indices
a) Bureau of Indian Standards publication IS-383 deals with Specifications for Coarse
& Fine Aggregates from Natural sources for Concrete. It gives references of IS 2386 (Part I) for the Flakiness Index & Elongation Index
b) Similarly IS-1343: Code of practice for Pre-stressed Specification also refers to IS- 383 for Aggregates.
c) Indian Roads Congress publication IRC-21: Standard Specifications and Code of
Practice for Road Bridges refers to the same IS-383 for aggregates. This code also
mentions that coarse aggregate shall not contain pieces of disintegrated stones, soft,
flaky, elongated particles etc. But, the limits for the same are not mentioned therein.
d) MORT&H and NPC specifications limit Flakiness index and Elongation index to 15%
each.
a) Bureau of Indian Standards publication IS-383 deals with Specifications for Coarse
& Fine Aggregates from Natural sources for Concrete. It gives references of IS 2386 (Part I) for the Flakiness Index & Elongation Index
b) Similarly IS-1343: Code of practice for Pre-stressed Specification also refers to IS- 383 for Aggregates.
c) Indian Roads Congress publication IRC-21: Standard Specifications and Code of
Practice for Road Bridges refers to the same IS-383 for aggregates. This code also
mentions that coarse aggregate shall not contain pieces of disintegrated stones, soft,
flaky, elongated particles etc. But, the limits for the same are not mentioned therein.
d) MORT&H and NPC specifications limit Flakiness index and Elongation index to 15%
each.