Common use of MIX DESIGN Clause in Contracts

MIX DESIGN. 45.1 The following instructions shall be followed as regards preliminary design of mix and methods of batching of plain cement concrete and reinforced cement concrete. These instructions should be treated as supplementary to the relevant provision in the specifications for the respective items contained in the book of standard specifications and will override the provisions contained therein wherever they are contrary to the following instructions. The preliminary mix design and batching for various grades of concrete shall be governed by the following guidelines. Concrete Grade Guidelines 1) Upto M-15: This should only be ordinary concrete. No change may be prescribed in the present practice as regards preliminary design of mix and permitting volume batching. Only cement to weight batched 2) M-20 to M-25 : Preliminary mix design must be carried out for these mixes. However, weight batching shall be insisted for cement .only for concrete m-20 and above

MIX DESIGN. 45.1 The following instructions shall be followed as regards preliminary design of mix and methods of batching of plain cement concrete and reinforced cement concrete. These instructions should be treated as supplementary to the relevant provision in the specifications for the respective items contained in the book of standard specifications and will override the provisions contained therein wherever they are contrary to the following instructions. The preliminary mix design and batching for various grades of concrete shall be governed by the following guidelines. Concrete Grade Guidelines 1) Upto M-15: This should only be ordinary concrete. No change may be prescribed in the present practice as regards preliminary design of mix and permitting volume batching. Only cement to weight batched 2) M-20 to M-25 : Preliminary mix design must be carried out for these mixes. However, weight batching shall be insisted for cement .only for concrete m-20 and abovebatched