Mix proportioning of plain and rice husk ash concrete as per draft IS 10262

With the revision of IS 456 in the year 2000, it is mandatory on the part of designers and users to follow the new specifications which are relevant for concrete mix design. Significant modifications have been made in many aspects of concrete mix design in the draft IS 10262 : 2004, which is currently being circulated by Bureau of Indian Standards (BIS). The method proposed in the draft code can be used for the design of ordinary and standard concrete grades using concreting materials and other supplementary materials identified for this purpose. Here the mix proportioning is done for plain and rice husk ash (RHA) concrete. Two percentages of RHA namely 15% and 25 % as replacement to cement have been tried in this work. The investigation is only an attempt to demonstrate the use of draft code for the design of concrete that contains cement alone and a combination of cement and rice husk ash which is a supplementary cementing material.