Concrete mix design (and Concrete mix design data)

"When it became apparent that stocks of the first impression of the book would be exhausted within nine months of publication a revision, rather than a reprint, seemed justified because of the issue, early in 1965, of two British Standard Codes of Practice. The new code, The structural use of precast concrete, CP 116, and the older code, The structural use of reinforced concrete in buildings, CP 114, amended to bring it generally into line with CP 116, made the following radical changes in the approach to mix design: the introduction of standard mixes and the corresponding relegation of nominal mixes, based on volume proportions, to a thing of the past; the introduction of more comprehensive requirements for the durability of concrete and for the amount of cover to reinforcing steel to provide adequate protection under various conditions of exposure; the introduction of a statistical control technique for condition of continuous production of concrete such that failure to comply with the requirements resulted in the rejection of the mix proportions used in making the concrete rather than of the concrete itself (other than in exceptional circumstances); the elimination of stringent requirements for the strength of preliminary test cubes except for nominal mixes; the general adoption of the standard deviation of cube results as the measure to be used for assessing the variability of concrete produced from a particular plant, irrespective of the average strength provided it is within the range permitted by the codes; the amplification of clauses relating to the use of high alumina cement and lightweight aggregates. Much of the early chapters of the first edition of the book was devoted to an attempt to interpret some of the inconsistencies apparent in the existing codes; but now that the first four changes listed above have been made at the author's instigation, the approach to designing mixes to comply with the new code is much..." [from preface to the second edition]