Similarly, the glass windows, lenses and other optical units may be affected by atmospheric vapors, which will produce a dimming or fogging of the surfaces due to extraction of
alkalies (Mclellan and Shand, 1984).
The insurance company denied coverage for the policybolder's liability for the damage to the cars on the ground that paint is either a liquid, or alternatively, because of its chemical composition, an acid or
alkali, and thus was excluded by the above-cited policy language.
In this regard, factors such as type and contents of the activator [6, 8, 10-12], curing conditions [13-16], and mineral admixtures [17-19] in the
alkali activation process were considered important.
The powerful
alkali has been used assaults in East London schools.
Use of blended cements, especially pozzolanic cements, in the construction of concrete dams is generally considered as an effective measure for minimizing the risk of deleterious AAR expansion, thanks to the ability of their hydration products to incorporate most of the
alkalis initially available in the pore solution of the cementitious matrix [9, 10].
Mohanty, "Alternative
alkalis for ASP flooding in anhydrite containing oil reservoirs," Fuel, vol.
The capture of volatile
alkalis by Aurora increased the ash melting temperature and lessoned the slagging intensity.
These materials were first produced on a significant scale by Purdon in the 1940s (Purdon 1940), but the worldwide awareness of this technology started to develop in 1950s with the work developed by Glukhovsky in Eastern Europe, who investigated the binders used in ancient Roman and Egyptian structures (Glukhovsky 1994), discovering the possibility of producing binders using low basic calcium or calcium-free aluminosilicates (clays) and solutions containing
alkali metals (Glukhovsky 1959).
The objective of present experimental program was to study effect of
alkali content (%[Na.sub.2]O) of fly ash based geopolymer mortar specimens on its performance in nitric acid solution.
One of the first studies of
alkali activated fly ash concerned the synthesis of zeolites.
Plagioclase dramatically removes Sr at intermediate stages and
alkali feldspars sequester Ba and Rb as late-stage trachytes and phonolites form in alkaline magmas.
In 1995, a team using the
alkali metal rubidium raced past them to make the first sample of the remarkable form of matter (SN: 7/15/95, p.
