Tender Document - irpmu.railnet.gov.in
Tender Document - irpmu.railnet.gov.in
Tender Document - irpmu.railnet.gov.in
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It may clearly be noted that the CAO/IRPMU/ Dy Chief Eng<strong>in</strong>eer/IRPMU shall<br />
have full power to make alterations <strong>in</strong> the draw<strong>in</strong>gs and to give such further<br />
<strong>in</strong>struction directions as may appear to him necessary for the guidance of the<br />
contractor and for the officials for execution, completion and ma<strong>in</strong>tenance of the<br />
work, if required dur<strong>in</strong>g execution of the work.<br />
The plan, sites and items of work are subject to alterations to suit the local<br />
conditions as per requirement of the Railway and the contractors will have no<br />
claim on account of the change <strong>in</strong> plan, sites and items of work etc.<br />
6.0 CEMENT:<br />
6.1 Portland Pozolona cement grade-33/43 conform<strong>in</strong>g to IS: 8112 capable of<br />
achiev<strong>in</strong>g the required Design concrete strength shall only be used, If contractor<br />
desire to use ready factory made blended cement with the precautions regard<strong>in</strong>g<br />
cur<strong>in</strong>g and limitations with the specific approval of Dy, Chief Eng<strong>in</strong>eer.<br />
6.2 To improve the workability of concrete admixtures conform<strong>in</strong>g to IS: 6925 AND is:<br />
9103 could be permitted subject to satisfactory proven use. Admixtures<br />
generat<strong>in</strong>g hydrogen, nitrogen, chlorides etc, shall not be used.<br />
6.3 Cement content <strong>in</strong> concrete for PSC work shall neither be less than 400 kg/cum<br />
of concrete nor more than 500 kg/cum of concrete <strong>in</strong> design mix.<br />
6.4 Quality test certificate for cement from manufacturer as per IS Code shall be<br />
produced by the contractor before use of Cement supplied.<br />
6.5 The contractor shall procure cement for use <strong>in</strong> the works from the ma<strong>in</strong><br />
producers or their authorized dealers only.<br />
6.6 Cement older than 6 weeks from the date of manufacture as marked on the bags<br />
shall not be accepted. Cement bags preferably <strong>in</strong> HDPE bags pack<strong>in</strong>g should<br />
bear the follow<strong>in</strong>g mark<strong>in</strong>gs:-<br />
(i)<br />
(ii)<br />
(iii)<br />
(iv)<br />
(v)<br />
Manufacturer’s Name<br />
Registered trademark of manufacturer, if any.<br />
Type of cement.<br />
Weight of each bad <strong>in</strong> Kg or No. of Bags/Tonne.<br />
Time/Period of manufacture generally marked as week of the year/year of<br />
manufacture.<br />
6.7 Every delivery of cement shall be accompanied by a producer’s certificate<br />
confirm<strong>in</strong>g that the supplied cement conforms to relevant specifications, Every<br />
consignment of cement must have identification marks on packages <strong>in</strong>dicat<strong>in</strong>g<br />
date of manufactur<strong>in</strong>g and grade and type of cement.<br />
OS/Works 48
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