Improved utilisation of blast furnace and steel works slags
This publication contains two technical reports. The first concerns one of the main drawbacks to using steel slags in road construction, which is the possibility of disruptive expansion caused by hydration of free lime. An accelerated test would be of help in characterising slags at an early stage. It is important that conditions imposed to accelerate the process do not cause different reactions to occur. A series of tests was carried out using expansion cells, and based on these results, a temperature of 80 C and a relative humidity of 90% were selected as giving the most rapid and reliable results. The second technical report deals with quenched blast furnace slag for use in cementitious applications, produced by granulating with large amounts of water. Pelletising offers the possibility of lower capital costs and a drier product. The glass content of such pelletised material may not be as high as in granulated slag. This glass content has been regarded as a factor governing the hydraulic activity, in combination with the overall chemical composition. This report describes tests on the strength development in mixtures of quenched blast furnace slag and ordinary portland cement, to investigate this effect.
Bibliographic Reference: EUR 11681 EN (1988) MF, 98 pp., ECU 8, blow-up copy ECU 12.50
Record Number: 198910307 / Last updated on: 1994-12-01
Original language: en
Available languages: en