Title:
Durability of Concrete Made With Alkali-Activated Slag
Author(s):
K. Byfors, G. Klingstedt, V. Lehtonen, H. Pyy, and L. Romben
Publication:
Symposium Paper
Volume:
114
Issue:
Appears on pages(s):
1429-1466
Keywords:
activators; alkalies; concrete durability; freezing; microstructure; reinforcing steels; salts; slag cements; strength; Materials Research
DOI:
10.14359/1827
Date:
5/1/1989
Abstract:
Durability properties of concrete and mortar based on a special type of alkali-activated slag called F-cement have been studied. The microstructure was found to possess a high occurrence of microcracks that had an obvious influence on the flexural strength and rate of carbonation. The rate of chloride-ion diffusion was about 30 times lower than in the portland cement concrete. Salt scaling was found to depend solely on the water-to-binder ratio and is independent of the air content. Early freezing takes place when the strength exceeds 5 MPa, and F-mortar shows high chemical resistance against solutions of sodium, calcium, and magnesium chloride.