Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Material Properties of F-Concrete at High Temperatures
F-cement is a binder for concrete based on finely ground granulated blast furnace slag activated with an alkaline admixture. The base material consists mainly of Ca-silicates of considerably lower CaO/SiO2-ratio than ordinary Portland Cement (OPC) clinker. It has a lower water requirement than pure clinker, it liberates little or no Calcium hydroxide during hydration and the liquidizing effect of superplasticizers is much stronger than on OPC clinker. The leads to a different mineralogical and structural composition of the cement paste that significantly influences the thermal behavior of the concrete. It has been necessary to investigate the properties of F-concrete also at high temperatures to answer the question whether concrete members and structures made with F-concrete indicate the same fire safety level as those made with OPC-concrete. All the concretes behaved nearly in the same way up to a temperature of almost 350 deg C. Owing to a different mineralogical and structural composition (especially low Calcium hydroxide-content), the F-concrete indicates in many respects a more advantageous high temperature behavior than OPC-concrete. Strong increase in transient strain and loss of strength occur first above 600 deg C.
Material Properties of F-Concrete at High Temperatures
F-cement is a binder for concrete based on finely ground granulated blast furnace slag activated with an alkaline admixture. The base material consists mainly of Ca-silicates of considerably lower CaO/SiO2-ratio than ordinary Portland Cement (OPC) clinker. It has a lower water requirement than pure clinker, it liberates little or no Calcium hydroxide during hydration and the liquidizing effect of superplasticizers is much stronger than on OPC clinker. The leads to a different mineralogical and structural composition of the cement paste that significantly influences the thermal behavior of the concrete. It has been necessary to investigate the properties of F-concrete also at high temperatures to answer the question whether concrete members and structures made with F-concrete indicate the same fire safety level as those made with OPC-concrete. All the concretes behaved nearly in the same way up to a temperature of almost 350 deg C. Owing to a different mineralogical and structural composition (especially low Calcium hydroxide-content), the F-concrete indicates in many respects a more advantageous high temperature behavior than OPC-concrete. Strong increase in transient strain and loss of strength occur first above 600 deg C.
Material Properties of F-Concrete at High Temperatures
U. M. Jumppanen (Autor:in) / U. Diederichs (Autor:in) / K. Hinrichsmeyer (Autor:in)
1986
64 pages
Report
Keine Angabe
Englisch
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