Specification Part 3 - Road & Bridge Works - Urban Administration ...

S. No. Nominal size of
aggregate
Designation of sieve
through which the
aggregates shall
wholly pass
Designation of sieve on
which the aggregates
shall be wholly retained
(i) 75 mm 106mm 63mm
(ii) 63 mm 90mm 53 mm
(iii) 45mm 53 mm 26.5 mm
(iv) 26.5 mm 45mm 22.4mm
(v) 22.4mm 26.5 mm 13.2mm
(vi) 13.2mm 22.4 mm 11.2mm
(vii) 11 .2 mm 13.2mm 6.7mm
(viii) 6.7mm 11 .2 mm 2.8 mm
514.3. Stacking
1. Coarse Aggregates:
(i)Only the aggregates satisfying the Specification requirements shall be conveyed to the
roadside and stacked.
(ii)Each size of aggregate shall be stacked separately.
(iii)Likewise, materials obtained from different quarry sources shall be stacked separately and in
such a manner that there is no contamination of one source with another.
2. Fine Aggregate:
(i)As stated in the individual relevant Specification Clauses.
(ii)The aggregates shall be stacked entirely clear of the roadway on even clear hard ground, 01
on a platform prepared in advance for the purpose by the Contractor at his own cost and in a
manner that allows correct and ready measurement.
(iii)If the stockpile is placed on ground where the scraping action of the loader can contaminate
the material with underlying soil, then the stockpile shall be rejected by the Engineer in charge.
(iv)Materials shall not he stacked in locations liable to inundation or flooding.
(v)The dimensions of the stockpiles and their location shall be approved by the Engineer in
charge. Where the material is improperly stacked, the Engineer in charge shall direct complete re
-stacking of the materials in an approved manner at the Contractor’s cost. (vi)Stone filler shall be
supplied in a dry state in bags or other suitable containers approved by the Engineer in charge
and shall be protected from the environment, so as to prevent deterioration in quality.
514.4. Quality Control of Materials
(i)The Engineer in charge shall exercise control over the quality of the materials so as to ascertain
their conformity with the Specification requirements, by carrying out tests for the specified
properties.
(ii)Testing shall be to the following frequencies and the Engineer in charge may, at his discretion,
direct these to be modified according to requirements:
(a)Coarse and fine:
(b)Stone filler:
One test for each specified property per 50 m3 of stone aggregates.
One test for each specified property for every five tonnes, subject
to a minimum of one test for each consignment.
(iii)Materials shall only be brought to site from a previously tested and approved source, and any
materials not conforming to the requirements of the Specification shall be rejected by the
Engineer in charge and removed from the work site.
514.5. Measurement for Payment
(i)Coarse and fine aggregates supplied to the site shall be paid for in cubic meters.