Report BR 235 High alumina cement concrete in existing building superstructures
Publication Year
1985
Document Status
Withdrawn
Abstract
Concerned with high alumina cement concrete in existing building superstructures, and has the object of giving information to engineers, who may from time to time be required to undertake structural appraisals. The results of more recent research have led to a better understanding of hydration processes and of the effect of conversion of the metastable calcium aluminate hydrates to the stable form on the strength and durability of the concrete. The strength of high alumina cement concrete with the mix proportions used in prestressed concrete components reduces as a result of conversion at the temperatures for normal building occupancies. The extent of the loss of strength is critically dependent on temperature, particularly during the early life of the concrete, and on water/cement ratio. Generally, the durability of prestressed concrete, including embedded tendons, in dry buildings should be adequate for normal building lives.
Author
Bate, S. C. C.
Publisher Information
BRE
BRE is a building science centre that generates new knowledge through research. This is used to create products, tools and standards that drive positive change across the built environment. BRE helps its government and private sector clients meet the significant environmental, social and economic challenges they face in delivering homes, buildings and communities. BRE is owned by the BRE Trust, a registered charity. The Trust uses the profits made by the BRE companies to fund research and education that advances knowledge of the built environment.
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