A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Calcium aluminate cement as binder for textile reinforced concrete
The research project 'Textile reinforced concrete-development of a new technology' is investigating basic mechanisms regarding bond, durability and load-carrying capacity of textile reinforced concrete. In this paper efforts for optimization of the matrix with regard to compatibility with the textile materials (alkali resistant glass fibres) as well as a suitable consistency, rapid hardening, and high early strengths were reported. Guidelines and standards for designing textile reinforced concrete structures and the production of precast concrete elements for suitable applications were provided. Different binder systems based on ordinary Portland cement, blast furnace slag cement and calciumaluminate cement were tested. The properties of fresh concrete, the mechanical properties and a range of durability and micromechanical properties, for example, damage of the glass fibres by hydration products were investigated. The investigated binders were CEM I 52,5, CEM III/B 42.5, CEM III/C 32.5 and Fondu, Lafarge. The alkali-resistant glass fibres used for tension tests were CEMFIL-2400 tex and CEMFIL-320 tex. The glass fibre rovings were stored in synthetic pore solutions of pH-values 14 and 11 and exposed to accelerated aging for 4 days at 50 deg C. They were tested by tensile tests and SEM-investigations. Mechanical attack due to ongrowing hydration products was investigated by SEM-analysis. A significant reduction of the tensile strengths indicating a severe chemical attack showed the importance for optimization the formulation of the matrix to avoid glass corrosion. The results of the tests showed the suitability of calciumaluminate cement as binder for textile-reinforced concrete in principle, but indicated a need for further optimization and research.
Calcium aluminate cement as binder for textile reinforced concrete
The research project 'Textile reinforced concrete-development of a new technology' is investigating basic mechanisms regarding bond, durability and load-carrying capacity of textile reinforced concrete. In this paper efforts for optimization of the matrix with regard to compatibility with the textile materials (alkali resistant glass fibres) as well as a suitable consistency, rapid hardening, and high early strengths were reported. Guidelines and standards for designing textile reinforced concrete structures and the production of precast concrete elements for suitable applications were provided. Different binder systems based on ordinary Portland cement, blast furnace slag cement and calciumaluminate cement were tested. The properties of fresh concrete, the mechanical properties and a range of durability and micromechanical properties, for example, damage of the glass fibres by hydration products were investigated. The investigated binders were CEM I 52,5, CEM III/B 42.5, CEM III/C 32.5 and Fondu, Lafarge. The alkali-resistant glass fibres used for tension tests were CEMFIL-2400 tex and CEMFIL-320 tex. The glass fibre rovings were stored in synthetic pore solutions of pH-values 14 and 11 and exposed to accelerated aging for 4 days at 50 deg C. They were tested by tensile tests and SEM-investigations. Mechanical attack due to ongrowing hydration products was investigated by SEM-analysis. A significant reduction of the tensile strengths indicating a severe chemical attack showed the importance for optimization the formulation of the matrix to avoid glass corrosion. The results of the tests showed the suitability of calciumaluminate cement as binder for textile-reinforced concrete in principle, but indicated a need for further optimization and research.
Calcium aluminate cement as binder for textile reinforced concrete
Calciumaluminatzement als Binder für gewebe-verstärkten Beton
Brameshuber, W. (author) / Brockmann, T. (author)
2001
8 Seiten, 5 Bilder, 3 Tabellen, 8 Quellen
Conference paper
English
Calciumaluminatzement , Werkstoffeignung , Werkstoffeigenschaft , Bewehrungsmatte , Kompatibilität , Werkstoffverträglichkeit , Werkstoffauswahl , Richtlinie , Norm , glasfaserverstärkter Zement , Rezeptur , chemische Zusammensetzung , Additiv , Gehalt (Zusammensetzung) , Konsistenz , Erhärten (Zementabbinden) , mechanische Festigkeit , Bindemittel , Korrosion , chemische Beständigkeit , Zugfestigkeit , Rheologie , Abbindung
Calcium Aluminate Cement as Binder for Textile Reinforced Concrete
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