Cold-laid bituminous paving materials

Claim 1

A PAVING MATERIAL SUITAVLE FOR STOCKPILING AND COLDLAYING TO FORM PAVEMENTS WHICH HAVE HIGH EARLY STABILITY AND HIGH HEAT STABILITY AS MEASURED BY THE MARSHALL STABILITY TEST, CONSISTING ESSENTIALLY OF AGGREGATE COATED WITH (1) A BITUMINOUS BINDER LIQUID AT AMBIENT TEMPERATURES; (2) A SUBSTANTIALLY UNAMALGAMATED POWEDERED NATURAL ASPHALTITE HAVING A SOFTENING POINT OF AT LEAST ABOUT 33* F. DISSOLVED THROUGHOUT SAID LIQUID BINDER SAID LIQUID BINDER HAVING A VISCOSITY OF AT LEAST 7,000 CPS. AT THE CRITICAL AMALGAMATION TEMPERATURE OF SAID POWDERED NATURAL ASPHALITE IN SAID LIQUID BINDER, THE CRITICAL AMALGAMATION TEMPERATURE BEING THAT TEMPERATURE AT WHICH THE AMALGAMATION RATE (D) IN VISCOSITY /D IN TEMPERATURE) OF SAID NATURAL ASPHALITE IN SAID LIQUID BINDER AFTER 100 HOURS IS BETWEEN ABOUT 0.1 AND ABOUT 0.3, SAID CRITICAL AMALGAMATION TEMPERATURE BEING AT LEAST AOUT 5* F. HIGHER THAN THE MAXIMUM TEMPERATURE ANTICIPATED DURING THE STOCKPILING PERIOD, THE VISCOSITY OF SAID LIQUID COMPONENT OF THE BINDER BEING NOT GREATER THAN ABOUT 200,000 CPS. AT ANY TEMPERATURE ANTICIPATED FOR THE WORKING OF SAID COATED AGGREGATE.