Material and method for coloring portland cement concretes

Claim 1

IN THE PROCESS FOR MAKING AN INTEGRAL COLORES STRUCTURE BY PLACING PREVIOUSLY PREPARED PORTLAND CEMENT CONCRETE MIX WHEREIN THERE IS A DISPERSED COLORING AGENT, THE METHOD OF INTEGRALLY COLORING SAID CONCRETE STRUCTURE WHEREBY THE COLORING EFFECT OF SAID MINERAL COLORING AGENT IS GREATLY ENHANCED AND MADE MORE UNIFORM AND WHEREBY THE SAID PORTLAND CEMENT CONCRETE WHEN HARDENED IS IMPROVED IN STRENGTH AND IN RESISTANCE TO SUBSEQUENT CORROSION, WHICH COMPRISES MIXING TOGETHER WITH SAID PORTLAND CEMENT CONCRETE MIX A COLORING AGENT CONSISTING OF A FINELY GROUND MENERAL PIGMENT SELECTED FROM THE GROUP CONSISTING OF IRON OXIDE AND CHROMIUM OXIDE AND A POZZOLAN WHICH POZZOLAN IN THE PRESENCE OF WATER IS REACTIVE WITH THE PORTLAND CEMENT OF SAID CONCRETE TO FROM AN AQUEOUS REACTION PRODUCT IN WHICH SAID MINERAL COLORING AGENT REMAINS DISPERED; PLACING SAID PORTLAND CEMENT CONCRETE MIX, PIGMENT AND POZZOLAN MIXTURE, AND COLORED CONCRETE STRUCTURE,