Author: Concrete Bridge Development Group (CBDG)
1st May 2014
First published: 1st May 2014
Standard: £9 + VAT
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Concrete Bridge Development Group (CBDG)
This final article in the composite part of this construction compendium looks at three aspects of construction; the provision of lateral restraint to the beams, whether the steelwork is propped and how the concrete is levelled.
This Technical Guidance Note describes how steel fibre reinforced concrete ground bearing slabs are designed. This is a relatively recent innovation that continues to evolve. As such, this note aims to motivate the design and development of steel fibre reinforced ground bearing slabs, based on the most up-to-date information available at the time of writing.
During remediation of distressed buildings in Dublin, horizontal cracks more than 20mm wide have been seen in the concrete block sub-structure walls. When pyrite-rich calcareous aggregate oxidises beneath a ground floor slab, it can raise and crack the concrete floor. In addition, it has been found that when tightly compacted fill expands, it may grip the substructure walls such that the whole super-structure is lifted off these support walls.