Changes in Mix Proportions for the Cement Mortars with the Use of High Grade Ordinary Portland Cement

Abstract

The latest technological developments in the manufacture of Ordinary Portland Cement have led to the production of high grade cements viz., 43 and 53 grades. The in crease in strengths results in economy in consumption of cement in the production of concrete (l,2l.The mix proportions for the cement mortars which are now in use were fixed when only 33 grade OPC was available. Since then no modifications were made in the proportions of cement mortars used as a binder in masonry even after the introduction of high grade cements. Hence, there is a need for an investigation in the direciion of fixing the mix proportions of high grade cement mortars. This paper presents an experimental investigaiion carried out to know whether any changes can be made in the mix proportions of mortars wiih the use of high grade ce ments. In fixing the mix proportions with high grade cements the parameters selected were the flow value and cumpression strength of mortars.