Cementitious material

Abstract

Synthetic pozzolans are produced using local materials to provide a cementitious material that is uniform in chemistry and properties independent of the location where the materials are obtained. Two methods of production are described. One is a high temperature process in which materials are processed in a semi-molten or molten state. The second process is a low temperature aqueous process.

1 .- 25 . (canceled) 
     
     
         26 . A cementitious material, comprising:
 a crystalline phase and an amorphous phase, and   an activator selected from the group of materials comprising inorganic bases.   
     
     
         27 . The cementitious material of  claim 26 , wherein the activator is selected from one of OPC (1-70 wt %), free lime (1-20 wt %), calcium hydroxide (1-20 wt %), and alkali hydroxides (NaOH, KOH 1 to 10 wt %), and combinations thereof. 
     
     
         28 . The cementitious material of  claim 26 , wherein the amorphous material comprises amorphous calcium aluminum silicate. 
     
     
         29 . The cementitious material of  claim 26 , wherein the crystalline phase comprises in its majority crystalline gehlenite. 
     
     
         30 . The cementitious material of  claim 26 , wherein the crystalline phase comprises in its majority crystalline anorthite.