STUDY ON DURABILITY CHARACTERISTICS OF HIGH PERFORMANCE CONCRETE (HPC)
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Date
2006-05
Authors
EL OTTOL, RAED M A
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Abstract
The recent developments in the field of high-performance concrete (HPC)
represent a giant step toward making concrete a high-tech material with
enhanced characteristics and durability. These developments have even led to
it being a more ecological material in the sense that the components
admixtures, aggregates, cementitious materials and water are used to their full
potential to produce a material with a superior durability and longer life cycle.
Environmental factors, especially the climate, have significant influence
on durability of concrete material. This dissertation aims to investigate the
durability characteristics of High-performance concrete material which can resist
the environmental factors more than-ordinary' con crate not only because H:ghperformance
concrete is less porous, but also because its capillary and pore
networks are somewhat disconnected due to the development of self desiccation
and the effects of cementitious materials such as Fly ash, Silica
Fume and Slag result reduces the water demand, improve the workability, and
enhances durability to reinforcement corrosion, sulfate attack, and alkali-silica
expansion. In high-performance concrete (HPC), the penetration of aggressive
agents is quite difficult and only superficial. Therefore, HPC must be cured
quite differently from ordinary concrete. Field experience in many researches
has shown that if HPC is properly designed and cured, performs satisfactorily in
very harsh environments.
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Keywords
PERFORMANCE CONCRETE