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Sorptivity of concrete composite systems. A measure of non-destructive testing
The movement of water into concrete is controlled by capillary suction forces existing in the empty capillary cavities within the paste matrix. This in turn depends on the saturation gradient through the cover region which varies depending on the time of the year. As the degree of saturation of a material increases, capillary suction forces reduce, being zero in a fully saturated state. Movement of water and ions into concrete is thus a combination of movement by capillary suction forces and diffusion process. The sorptivity is an easily measured material property which characterizes the tendency of a porous material to absorb and transmit fluids by capillarity. This is a simple parameter to determine and is increasingly being used as a measure of a material's resistance to exposure to fluids (especially moisture and reactive solutes) in aggressive environments. In this investigation sorptivity measurements were carried out for various concrete composite systems containing fly ash and microsilica. It was found that the incorporation of fly ash resulted lower sorptivity, especially with lower fly ash contents and inclusion of microsilica reduced sorptivity significantly.
Sorptivity of concrete composite systems. A measure of non-destructive testing
The movement of water into concrete is controlled by capillary suction forces existing in the empty capillary cavities within the paste matrix. This in turn depends on the saturation gradient through the cover region which varies depending on the time of the year. As the degree of saturation of a material increases, capillary suction forces reduce, being zero in a fully saturated state. Movement of water and ions into concrete is thus a combination of movement by capillary suction forces and diffusion process. The sorptivity is an easily measured material property which characterizes the tendency of a porous material to absorb and transmit fluids by capillarity. This is a simple parameter to determine and is increasingly being used as a measure of a material's resistance to exposure to fluids (especially moisture and reactive solutes) in aggressive environments. In this investigation sorptivity measurements were carried out for various concrete composite systems containing fly ash and microsilica. It was found that the incorporation of fly ash resulted lower sorptivity, especially with lower fly ash contents and inclusion of microsilica reduced sorptivity significantly.
Sorptivity of concrete composite systems. A measure of non-destructive testing
Sorptionsvermögen von Verbund-Beton-Systemen. Eine messende zerstörungsfreie Prüfung
Khan, Mohammad Iqbal (author)
2009
6 Seiten, 5 Bilder, 7 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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