Alkali-activated slags and glasses
Conference
·
OSTI ID:214895
- Pennsylvania State Univ., University Park, PA (United States)
Granulated blast-furnace slags and other glassy materials used in modern cementing systems typically are subject to slower hydration reaction. To overcome is disadvantage slags are used in combination with other more alkaline materials. Portland cement is the most common material, although now alkali and alkaline earth metal oxides chlorides, hydroxides, sulfates and occasionally silicates are also used as activators for slags, fly ashes and other amorphous materials. These alkali activated materials hydrate to form a C-S-H that is in many ways similar to the C-S-H found in ordinary Portland cement, but it exhibits a lower CaO/SiO{sub 2} ratio and more long-range order. The hydration is controlled by a combination of chemical and physical factors, resulting in a denser microstructure, generating lower permeability that characteristics of ordinary portland cement paste. This is very significant for controlling long term performance.
- OSTI ID:
- 214895
- Report Number(s):
- CONF-950801--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Alkali-slag cements for the immobilization of radioactive wastes
Study of the properties of slag-alkali cements based on nickel slags
Effect of alkali bypass dust on the hydration of granulated blast furnace slag blended cement
Conference
·
Mon Dec 30 23:00:00 EST 1996
·
OSTI ID:549380
Study of the properties of slag-alkali cements based on nickel slags
Journal Article
·
Sat Sep 20 00:00:00 EDT 1986
· J. Appl. Chem. USSR (Engl. Transl.); (United States)
·
OSTI ID:6123401
Effect of alkali bypass dust on the hydration of granulated blast furnace slag blended cement
Journal Article
·
Mon May 01 00:00:00 EDT 1995
· Cement and Concrete Research
·
OSTI ID:63244