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A platform for research: civil engineering, architecture and urbanism
Incorrect Air Void Parameters in Fly Ash Concretes
The influence of fly ash on air void systems in hardened concretes is analyzed in the paper. The tests of air voids characteristics in hardened concretes were conducted on an air void analyzer. The tests were performed on 56 non-air-entrained and air-entrained fly ash concretes with varied losses on ignition, percentages of cement replacement with fly ash, and water-cementitious materials ratio (w/cm). The results show that the total content of air in airentrained concretes with fly ash addition equals the sum of air content coming from air entrainment and the pores in grains of fly ashes. The analysis of the tests results showed that the air-void parameters are disturbed by fly ash. The paper includes a multistep procedure for the explanation why and how fly ash affects the air-void parameters in the hardened concretes. On this basis, it has been proved that the total air content in hardened concretes with fly ash is the sum of the contents of air voids and the pores contained in the grains of fly ash.
Incorrect Air Void Parameters in Fly Ash Concretes
The influence of fly ash on air void systems in hardened concretes is analyzed in the paper. The tests of air voids characteristics in hardened concretes were conducted on an air void analyzer. The tests were performed on 56 non-air-entrained and air-entrained fly ash concretes with varied losses on ignition, percentages of cement replacement with fly ash, and water-cementitious materials ratio (w/cm). The results show that the total content of air in airentrained concretes with fly ash addition equals the sum of air content coming from air entrainment and the pores in grains of fly ashes. The analysis of the tests results showed that the air-void parameters are disturbed by fly ash. The paper includes a multistep procedure for the explanation why and how fly ash affects the air-void parameters in the hardened concretes. On this basis, it has been proved that the total air content in hardened concretes with fly ash is the sum of the contents of air voids and the pores contained in the grains of fly ash.
Incorrect Air Void Parameters in Fly Ash Concretes
Aneta Nowak-Michta (author)
ACI materials journal ; 114
2017
Article (Journal)
English
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