Microstructural and permeability properties of alkali-activated slag concrete

Tarja Häkkinen, Hannu Pyy, Pertti Koskinen

    Research output: Book/ReportReport

    1 Citation (Scopus)

    Abstract

    The study consists of a series of experimental investigations concerning the microstructural and permeability properties of alkali-activated slag concrete. The object of study is the so-called F-concrete. F-cement is finely ground slag to be activated by a combination of alkali metal compounds and rendered consistent in its fresh state by means of ligno-sulphonates. The influence of different parameters on the structure of F-concrete was studied by means of thermal analysis, X-ray diffraction and mercury intrusion. In addition, strength properties and permeability properties were studied. The influence of slag binder on chloride penetration and on carbonation was investigated. The permeability properties of F-concrete were also studied by means of capillary suction, water penetration and gas penetration. The parameters considered in the experimental studies were the quality of slag and additive, the proportion of concrete constituents and the curing conditions of the concrete specimens. According to the results the hardened slag paste is very dense, but the structure contains microscopic cracks due to hydration shrinkage. The effect of the cracks on the permeability properties was found to be significant. On the basis of strength results it is possible to produce F-concrete with very good mechanical properties.
    Original languageEnglish
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Number of pages110
    ISBN (Print)951-38-2918-9
    Publication statusPublished - 1987
    MoE publication typeD4 Published development or research report or study

    Publication series

    SeriesValtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports
    Number486
    ISSN0358-5077

    Fingerprint

    Slags
    Concretes
    Alkali metal compounds
    Cracks
    Carbonation
    Hydration
    Thermoanalysis
    Binders
    Curing
    Cements
    X ray diffraction
    Mechanical properties
    Gases
    Water

    Keywords

    • slag concrete
    • slag cements
    • F-concrete
    • concrete durability
    • microstructure
    • alkali aggregates
    • permeability

    Cite this

    Häkkinen, T., Pyy, H., & Koskinen, P. (1987). Microstructural and permeability properties of alkali-activated slag concrete. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 486
    Häkkinen, Tarja ; Pyy, Hannu ; Koskinen, Pertti. / Microstructural and permeability properties of alkali-activated slag concrete. Espoo : VTT Technical Research Centre of Finland, 1987. 110 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 486).
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    Häkkinen, T, Pyy, H & Koskinen, P 1987, Microstructural and permeability properties of alkali-activated slag concrete. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, no. 486, VTT Technical Research Centre of Finland, Espoo.

    Microstructural and permeability properties of alkali-activated slag concrete. / Häkkinen, Tarja; Pyy, Hannu; Koskinen, Pertti.

    Espoo : VTT Technical Research Centre of Finland, 1987. 110 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 486).

    Research output: Book/ReportReport

    TY - BOOK

    T1 - Microstructural and permeability properties of alkali-activated slag concrete

    AU - Häkkinen, Tarja

    AU - Pyy, Hannu

    AU - Koskinen, Pertti

    PY - 1987

    Y1 - 1987

    N2 - The study consists of a series of experimental investigations concerning the microstructural and permeability properties of alkali-activated slag concrete. The object of study is the so-called F-concrete. F-cement is finely ground slag to be activated by a combination of alkali metal compounds and rendered consistent in its fresh state by means of ligno-sulphonates. The influence of different parameters on the structure of F-concrete was studied by means of thermal analysis, X-ray diffraction and mercury intrusion. In addition, strength properties and permeability properties were studied. The influence of slag binder on chloride penetration and on carbonation was investigated. The permeability properties of F-concrete were also studied by means of capillary suction, water penetration and gas penetration. The parameters considered in the experimental studies were the quality of slag and additive, the proportion of concrete constituents and the curing conditions of the concrete specimens. According to the results the hardened slag paste is very dense, but the structure contains microscopic cracks due to hydration shrinkage. The effect of the cracks on the permeability properties was found to be significant. On the basis of strength results it is possible to produce F-concrete with very good mechanical properties.

    AB - The study consists of a series of experimental investigations concerning the microstructural and permeability properties of alkali-activated slag concrete. The object of study is the so-called F-concrete. F-cement is finely ground slag to be activated by a combination of alkali metal compounds and rendered consistent in its fresh state by means of ligno-sulphonates. The influence of different parameters on the structure of F-concrete was studied by means of thermal analysis, X-ray diffraction and mercury intrusion. In addition, strength properties and permeability properties were studied. The influence of slag binder on chloride penetration and on carbonation was investigated. The permeability properties of F-concrete were also studied by means of capillary suction, water penetration and gas penetration. The parameters considered in the experimental studies were the quality of slag and additive, the proportion of concrete constituents and the curing conditions of the concrete specimens. According to the results the hardened slag paste is very dense, but the structure contains microscopic cracks due to hydration shrinkage. The effect of the cracks on the permeability properties was found to be significant. On the basis of strength results it is possible to produce F-concrete with very good mechanical properties.

    KW - slag concrete

    KW - slag cements

    KW - F-concrete

    KW - concrete durability

    KW - microstructure

    KW - alkali aggregates

    KW - permeability

    M3 - Report

    SN - 951-38-2918-9

    T3 - Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports

    BT - Microstructural and permeability properties of alkali-activated slag concrete

    PB - VTT Technical Research Centre of Finland

    CY - Espoo

    ER -

    Häkkinen T, Pyy H, Koskinen P. Microstructural and permeability properties of alkali-activated slag concrete. Espoo: VTT Technical Research Centre of Finland, 1987. 110 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 486).