The project also aims to explore the potential of combining novel calcium different types of cement with recycled construction and demolition waste (CDW) streams, initially in precast non-structural units (e.g., kerbing and blocks) through to ‘minimal requirement’ structural units (e.g., lintels, window jambs etc). However using recycled materials must not have an adverse effect on durability or the engineering properties of concrete. There is evidence that certain ‘green’ concretes may have poor carbonation resistance and properties can be adversely affected. Technically these issues can be resolved by careful specification writing for both the aggregates and their use in concrete.
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