Cement

The cement used shall he any of the following and the type selected should be appropriate for the intended use: a) 33 Grade ordinary Portland cement conforming to IS 269 b) 43 Grade ordinary Portland cement conforming to IS 8112 c) S3 Grade ordinary Portland cement conforming to IS 12269 d) Rapid hardening Portland cement conforming to IS 8041 e) Portland slag cement conforming to IS 4;5 f) Portland pozzolana cement (fly ash based) conforming to IS 1489 (Part 1) g) Portland pozzolana cement (calcined clay based) conforming to IS 1489 (Part 2) h) Hydrophobic cement conforming to IS 8043 j) Low heat Portland cement conforming to IS 12600 k) Sulphate resisting Portland cement conforming to IS 12330 Other combinations of Portland cement with mineral admixtures (see $.2) of quality conforming with relevant Indian Standards laid down may also be used in the manufacture of concrete provided that there are satisfactory dati on their suitability, such as performance test ~ concrete containing them. 5.1.1 Low heat Portland cement conforming to IS 12600 shall be usedwith adequate precautionswith regard to removal of formwork, etc. 5.1.Z Hiah alumina cement conforming to IS 6452 or supersulphated cement conforming to IS 6909 may be used only under special circumstances with the prior approval of the engineer-in-charge. Specialistliterature Inay be consu Ited for guidance regarding the use of these types of cements. 5.1.3 The attention of the engineers-in-charge and users of cement is drawn to the fact that quality of various cements mentioned in 5.1 is to be determined on the basis of its conformity to the performance characteristics given in the respective Indian Standard Specification for thatcement. Any trade-mark or any trade nameindicating any special features not covered in. the standard or any qualification or other special performance characteristics sometimes claimedl indicatedon the bass or containersor in advertisements alongside the 'Statutory QualityMarking' or otherwise have no relation whatsoever with the characteristics guaranteed by the Quality Marking as relevant to that cement. Consumers are, therefore, advised to go by the characteristics as given in the corresponding Indian Standard Specification or seek specialist advise to avoid any problem in concrete making and construction.