PROCESSING CONTROL OF BITUMINOUS CATIONIC EMULSIONS IN THE FACTORY
Jean‐Christophe Giger · BULL LIAISON LAB PONTS CHAUSS · 1977
THE AUTHOR OUTLINES A PERMANENT PROCESSING CONTROL FOR DETECTING FIXED-VALUE DEVIATIONS AND THE CAUSES OF THESE VARIATIONS; THE METHOD IS BASED ON THE FAILURE TEST, THE PRINCIPLE OF WHICH IS RECALLED. THE FAILURE TEST IS CARRIED OUT IN CONJUNCTION WITH: (1) MEASUREMENTS OF THE TEMPERATURE OF THE AQUEOUS PHASE OF THE BITUMEN AND OF THE EMULSION; (2) DETERMINATION OF THE WATER CONTENT; (3) MEASUREMENT OF THE EMULSION PH. A TABLE SHOWS THE LINKS BETWEEN THE ADDITIONAL MEASUREMENTS, THE CAUSES OF ABNORMAL RESULTS AND REMEDIAL MEASURES TO BE TAKEN. THE PROCESSING CONTROL IS DEFINED AS FOLLOWS: (1) PRELIMINARY PHASE OF PROCESSING, DURING WHICH FAILURE INDICES ARE DETERMINED FOR APPROXIMATELY 15 SAMPLES; A FIRST MEAN VALUE IS ESTABLISHED AND THE ELEMENTS NECESSARY TO THE DRAFTING OF A CONTROL SHEET ARE RECORDED; (2) QUALITY CONTROL OF MANUFACTURE CARRIED OUT BY COMPARING INDICES OF FAILURE VALUES AND THE ZONES CORRESPONDING TO A CORRECT OR INCORRECT MANUFACTURE.