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 language | English |
|---|---|
| Place of Publication | Espoo |
| Publisher | VTT Technical Research Centre of Finland |
| Number of pages | 110 |
| ISBN (Print) | 951-38-2918-9 |
| Publication status | Published - 1987 |
| MoE publication type | D4 Published development or research report or study |
Publication series
| Series | Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports |
|---|---|
| Number | 486 |
| ISSN | 0358-5077 |
Keywords
- slag concrete
- slag cements
- F-concrete
- concrete durability
- microstructure
- alkali aggregates
- permeability
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Cite this
Häkkinen, T., Pyy, H., & Koskinen, P. (1987). Microstructural and permeability properties of alkali-activated slag concrete. VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 486