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Concrete mix design optimisation

Minimizing binder content for better durability performance


Current concrete mix design standards are largely of the prescriptive type, i.e. recipe-based specifications that prescribe limiting values for certain mix design parameters, such as minimum cement content and maximum water/binder ratio. This has numerous economical, techni- cal and environmental disadvantages and is one of the driving factors behind the development of performance-based specifications to act as alternative means of design of concrete mixes. Despite this, a dominant assumption among professionals in the industry is that the dura- bility of a concrete mixture is directly proportional to its binder content. This may result in uneconomical, unsustainable and often non- durable concretes due to various implications of high cement contents, such as thermal effects, higher risks of alkali-silica reaction, dura- bility problems associated with higher paste contents, etc.

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 12 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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