IDENTIFICATION AND PROPORTIONING OF ORGANIC MATERIALS IN SAND

IDENTIFICATION ET DOSAGE DES MATIERES ORGANIQUES DANS LES SABLES

IT HAS BEEN SHOWN THAT ORGANIC MATTER PRESENT IN SAND CAN, IN SMALL DOSES, SLOW DOWN OR PREVENT THE SETTING OF GRAVEL- SLAG MIXTURES. EXTRACTIONS IN AN AQUEOUS, CALCIC AND SODIC MEDIUM FROM PEAT AND VEGETABLE WOULD HAVE SHOWN THAT ORGANIC MATTER WHICH CAN BE EXTRACTED WITH SODA IS THE MOST HARMFUL. IT IS PROPOSED TO STUDY SODIC EXTRACTS WITH A VIEW TO IDENTIFYING THEIR CONSTITUENTS AND TO DEFINING THEIR EFFECTS IN RETARDING SETTING.