NEW AGGREGATES

GRANULATS NOUVEAUX

THE AIM OF THE RESEARCH IS TO FIND REPLACEMENT MATERIALS TO SOLVE SOME PROBLEMS OF LOCAL SHORTAGE OF AGGREGATES AND TO DEVELOP PRODUCTS FULFILLING SPECIFIC NEEDS (NON-SKID AGGREGATES AND HARD WEARING AGGREGATES). ENCOURAGING RESULTS WERE OBTAINED WITH SAND-RESIN MIXTURES, CRUSHED BASALT STABILIZED WITH LIME AND STEEL-WORK SLAGS. IN 1976 EFFORTS WILL BE MADE TO IMPROVE THE USE OF CERTAIN BY-PRODUCTS (OLD CONCRETE, SLAG, WASHING FINES), AND SOME UNUSED DEPOSITS (VOLCANIC ASH) WILL BE INVESTIGATED.