Abstract
This dissertation presents the results of an experimental study on mix design and durability of fly ash concrete. The resistance to chloride penetration and the resistance to water penetration were investigated. The resistance to chloride penetration is expressed by the coefficient of chloride diffusion, and the resistance to water penetration is expressed by the coefficient of water permeability. The experiments were carried out using Ordinary Portland Cement (ASTM type I) and Lavalkali Sulphate Resistant Cement (ASTM type V) together with two different types of fly ash. The first fly originated from the burning of Polish coal and second fly ash from the burning of Columbian coal. Resistance of concrete against penetration of chloride ions was investigated by means of an electrochemical method which determines the so-called initiation period. It was found that the raw materials used to produce the concrete are significant. The type of cement is the dominant factor, while the type of fly ash and curing time exceeding a certain minimum is of less importance. The chloride investigation has shown that knowledge of the strength of a fly ash concrete is of no use in predicting the resistance against corrosion of steel in the same concrete. The penetration
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Citation Formats
Hedegaard, S E.
Fly ash concrete. Proportioning and density in relation to penetration of chloride ions and water; Flyveaskebeton. Proportionering og taethed overfor indtraengning af kloridioner og vand.
Denmark: N. p.,
1990.
Web.
Hedegaard, S E.
Fly ash concrete. Proportioning and density in relation to penetration of chloride ions and water; Flyveaskebeton. Proportionering og taethed overfor indtraengning af kloridioner og vand.
Denmark.
Hedegaard, S E.
1990.
"Fly ash concrete. Proportioning and density in relation to penetration of chloride ions and water; Flyveaskebeton. Proportionering og taethed overfor indtraengning af kloridioner og vand."
Denmark.
@misc{etde_10133553,
title = {Fly ash concrete. Proportioning and density in relation to penetration of chloride ions and water; Flyveaskebeton. Proportionering og taethed overfor indtraengning af kloridioner og vand}
author = {Hedegaard, S E}
abstractNote = {This dissertation presents the results of an experimental study on mix design and durability of fly ash concrete. The resistance to chloride penetration and the resistance to water penetration were investigated. The resistance to chloride penetration is expressed by the coefficient of chloride diffusion, and the resistance to water penetration is expressed by the coefficient of water permeability. The experiments were carried out using Ordinary Portland Cement (ASTM type I) and Lavalkali Sulphate Resistant Cement (ASTM type V) together with two different types of fly ash. The first fly originated from the burning of Polish coal and second fly ash from the burning of Columbian coal. Resistance of concrete against penetration of chloride ions was investigated by means of an electrochemical method which determines the so-called initiation period. It was found that the raw materials used to produce the concrete are significant. The type of cement is the dominant factor, while the type of fly ash and curing time exceeding a certain minimum is of less importance. The chloride investigation has shown that knowledge of the strength of a fly ash concrete is of no use in predicting the resistance against corrosion of steel in the same concrete. The penetration of water in concrete will be determined by voids and defects in the concrete surface. The results of this investigation indicated that the current limitations in the national Danish concrete code with regard to the use of fly ash in reinforced concrete are not justified and should be modified. (AB) 101 refs.}
place = {Denmark}
year = {1990}
month = {Jul}
}
title = {Fly ash concrete. Proportioning and density in relation to penetration of chloride ions and water; Flyveaskebeton. Proportionering og taethed overfor indtraengning af kloridioner og vand}
author = {Hedegaard, S E}
abstractNote = {This dissertation presents the results of an experimental study on mix design and durability of fly ash concrete. The resistance to chloride penetration and the resistance to water penetration were investigated. The resistance to chloride penetration is expressed by the coefficient of chloride diffusion, and the resistance to water penetration is expressed by the coefficient of water permeability. The experiments were carried out using Ordinary Portland Cement (ASTM type I) and Lavalkali Sulphate Resistant Cement (ASTM type V) together with two different types of fly ash. The first fly originated from the burning of Polish coal and second fly ash from the burning of Columbian coal. Resistance of concrete against penetration of chloride ions was investigated by means of an electrochemical method which determines the so-called initiation period. It was found that the raw materials used to produce the concrete are significant. The type of cement is the dominant factor, while the type of fly ash and curing time exceeding a certain minimum is of less importance. The chloride investigation has shown that knowledge of the strength of a fly ash concrete is of no use in predicting the resistance against corrosion of steel in the same concrete. The penetration of water in concrete will be determined by voids and defects in the concrete surface. The results of this investigation indicated that the current limitations in the national Danish concrete code with regard to the use of fly ash in reinforced concrete are not justified and should be modified. (AB) 101 refs.}
place = {Denmark}
year = {1990}
month = {Jul}
}