particular specifications (road works) - CIDCO Maharashtra Ltd.

CIDCO OF MAHARASHTRA LTD
C.A.No.01/CIDCO/SE(KHR)/EE(KHR-I)/2010–11 Pg. No. 348
TESTING :
A sample shall be tested for every batch of cement delivered on site on
once or for every 1000 bags, whichever is more frequent. Tests shall
be carried out for consistency fineness, soundness initial and final
setting time, and compressive strength (IS : 4031) and the results
approved by the Engineer before use of the cement in permanent
works. Samples shall be taken immediately on receipt of cement at
site. The methods and procedure of sampling shall be in accordance
with IS:3535. The Engineer may specify other forms of sampling and
tests including chemical analysis, (IS : 4032) if in his opinion the
cement is of doubtful quality; the costs of such additional tests shall be
borne by the Contractor. Each and every lot of cement shall be
accompanied by the manufacturer’s Test Certificate.
5.2 FINE AGGREGATES (SAND)
5.2.1 It shall be river sand conforming to IS : 383, obtained from sources
approved by the Engineer. These sands, if found coarser, shall be
suitably blended with finer sand obtained from approved source to
obtain the desired grading. The two types of sand will be stacked
separately and their mixing in the specified proportions shall be at the
Contractor’s cost.
The sand shall not contain more than a total of 3% by weight of shale,
clay, silt and other structurally weak particles.
If permitted by the Engineer crushed stone sand produced from stones,
suitable for concrete aggregate, and manufactured in special sand
producing crushers such as impactors, hammer mills and processed
through stone on stone, vertical shaft crushers for particle shaping and
excess fines removed by suitable dust extractors. The particle shape