Robert F. Stierli - Lexington MA Clayton C. Tarver - Everett MA James M. Gaidis - Columbia MD
Assignee:
W. R. Grace & Co. - Cambridge MA
International Classification:
C04B 904 C04B 3504
US Classification:
106 58
Abstract:
The setting time of quick-setting magnesium oxide-ammonium phosphate concretes is extended by the addition of specified oxy-boron compounds such as sodium borate. The incorporation of the oxy-boron compound in the composition has also been found to increase the extended or overall compressive strength of the composition.