Posted by The Bureau of Indian Standards has stipulated SP 23 (1982) to aid IS-10262, a code of practice for concrete mix design.
You can download relevant IS codes from the following list.
- IS-10262 : 2019, a code for the mix design of concrete
- SP 24-1978 explanatory handbook on IS-456 (1978)
- IS 800-2007, code of practice for design of steel structures