Process for coating aggregate with bituminous binder

Claim 1

THE METHOD OF COATING MINERAL AGGREGATE CONTAINING BOTH FINE AND COARSE AGGREGATE PARTICLES WHICH COMPRISES PRIMING SAID AGGREGATE WITH A FIRST PORTION OF AN OIL-INWATER EMULSION, SAID EMULSION COMPRISING AN AQUEOUS PHASE HAVING DISSOLVED THEREIN FROM ABOUT 0.1% AND ABOUT 1% BY WEIGHT OF THE EMULSION OF A WATER SOLUBLE AMPHOTERIC METAL INORGANIC SALT AND FROM ABOUT 1% TO ABOUT 6% BY WEIGHT BASED ON THE EMULSION OF A MINERAL ACID, AND A HYDROCARBON PHASE HAVING DISSOLVED THEREIN FROM ABOUT 10% TO ABOUT 20% BASED ON THE WEIGHT OF THE EMULSION OF AN ALIPHATIC AMINO COMPOUND BEARING AT LEAST ONE LIPOPHILIC RADICAL PER MOLECULE, WHEREBY THE FINE AGGREGATE PARTICLES HAVING MAXIMUM DIAMETERS LESS THAN ABOUT 5 MM. ARE COATED WITH THE PRIMER AND THE COARSER PARTICLES ARE SUBSTANTIALLY UNAFFECTED; MIXING WITH THE PRIMED AGGREGATE BETWEEN ABOUT 3% TO ABOUT 7% BY WEIGHT, BASED ON THE AGGREGATE, OF A BITUMINOUS BINDER, WHEREBY THE FINE AGGREGATE PARTICLES ARE COATED THEREWITH WHILE THE COARSER AGGREGATE PARTICLES ARE SUBSTANTIALLY UNCOATED; ADMIXING A SECOND PORTION OF SAID PRIMING EMULSION, WHEREBY THE COARSE AGGREGATE PARTICLES ARE PRIMED THEREWITH; AND MIXING THE ENTIRE COMPOSITION, WHEREBY BOTH FINE AND COARSE AGGREGATE PARTICLES ARE COATED WITH THE BINDER; THE TOTAL PROPORTION OF AMINO COMPOUND BEING BETWEEN ABOUT 0.005% TO ABOUT 0.03% BASED ON THE WEIGHT OF THE AGGREGATE.

Claim 2

THE METHOD OF COATING MINERAL AGGREGATE CONTAINING BOTH FINE AND COARSE AGGREGATE PARTICLES WHICH COMPRISES PRIMING SAID AGGREGATE WITH A FIRST PORTION OF AN OIL-INWATER EMULSION, SAID EMULSION COMPRISING AN AQUEOUS PHASE HAVING DISSOLVED THEREIN FROM ABOUT 0.1% AND ABOUT 1% BY WEIGHT OF THE EMULSION OF A WATER SOLUBLE AMPHOTERIC METAL INORGANIC SALT AND FROM ABOUT 1% TO ABOUT 6% BY WEIGHT BASED ON THE EMULSION OF A MINERAL ACID, AND A HYDROCARBON PHASE HAVING DISSOLVED THEREIN FROM ABOUT 10% TO ABOUT 20% BASED ON THE WEIGHT OF THE EMULSION OF AN ALIPHATIC AMINO COMPOUND BEARING AT LEAST ONE LIPOPHILIC RADICAL PER MOLECULE, WHEREBY THE FINE AGGREGATE PARTICLES HAVING MAXIMUM DIAMETERS LESS THAN ABOUT 5 MM. ARE COATED WITH THE PRIMER AND THE COARSER PARTICLES ARE SUBSTANTIALLY UNAFFECTED; MIXING WITH THE PRIMED AGGREGATE BETWEEN ABOUT 3% TO ABOUT 7% BY WEIGHT, BASED ON THE AGGREGATE, OF A BITUMINOUS BINDER, WHEREBY THE FINE AGGREGATE PARTICLES ARE COATED THEREWITH WHILE THE COARSER AGGREGATE PARTICLES ARE SUBSTANTIALLY UNCOATED; ADMIXING A SECOND PORTION OF SAID PRIMING EMULSION, WHEREBY THE COARSE AGGREGATE PARTICLES ARE PRIMED THEREWITH; AND MIXING THE ENTIRE COMPOSITION, WHEREBY BOTH FINE AND COARSE AGGREGATE PARTICLES ARE COATED WITH THE BINDER; THE TOTAL PROPORTION OF AMINO COMPOUND BEING BETWEEN ABOUT 0.005% TO ABOUT 0.03% BASED ON THE WEIGHT OF THE AGGREGATE.