The Mix Design of Conventional Concrete

Concrete Mix Design

There are many methods of concrete mix design. But the British or American methods will not be applicable for our country, as the specific relationships constituting figures and tables are based on their materials. The IS 10262 recommends procedure for designing concrete mixes for general types of construction using the concreting materials normally available1. The procedure was developed in 1982 based on the experiments carried out at the National Council for Cement and Building Materials (NCBM), New Delhi.
Concrete Mix Design
Concrete Mix Design
The method is primarily based on the basic assumption that the compressive strength of concrete is governed generally, by the water-cement ratio. The recent development of using chemical and mineral admixtures in concrete has not alterted the applicability of the age-old Abram’s water-cement ratio ‘law’, and the compressive strength of concrete is governed by the water-cementitious materials ratio used in concrete.
The cementitious materials include cement (OPC, PPC and PSC) and mineral admixtures, like, flyash, ggbs and silica fume.  In this paper, an attempt has been made to highlight that in the procedure of concrete mix design, the water-cement (or water-cementitious materials) ratio must be selected from an established relationship between this and the 28-day compressive strength of concrete.

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