摘要: |
THE USE OF SOME COAL BY-PRODUCTS IN EARTHWORKS CAN, IN SOME CASES, LEAD TO CONSIDERABLE SAVINGS BY REDUCING TRANSPORT COSTS. IT ALSO HELPS ENVIRONMENTAL PROBLEMS BY SOLVING THE QUESTION OF REUSING BY-PRODUCTS, BY ELIMINATING THE NEED TO START NEW BORROW PITS, AND BY ENABLING EXISTING BALLAST PITS, WHICH HAVE BECOME WILD AREAS, TO BE FILLED. IN 1977, IT IS ENVISAGED TO STUDY THE USE OF THE FOLLOWING BY-PRODUCTS: (1) BY-PRODUCTS FROM GARDANNE: LABORATORY TESTS ON CARBONATED AND NON-CARBONATED BY-PRODUCTS; BEHAVIOUR UNDER MECHANICAL STRESSES AND UNDER HYDRAULIC CONDITIONS; STUDY OF MIXTURES FOR IMPROVED SUBGRADES (CARBONATED BY-PRODUCTS PLUS NON-CARBONATED BY-PRODUCTS, AND CARBONATED BY-PRODUCTS PLUS MARLS) AND (2) BY-PRODUCTS FROM THE POTASSIUM CARBONATE MINES IN ALSACE: STUDY OF POLLUTION RISKS, STUDY OF SENSITIVITY TO FROST, STUDY OF THE POSSIBILITY OF STABILIZATION WITH HYDRAULIC BINDERS, CONSTRUCTION OF AN EXPERIMENTAL EMBANKMENT TO INVESTIGATE THE BEHAVIOUR OF SHALE UNDER HEAVY TRAFFIC, AND THE CONDITIONS OF DRAINAGE AND POLLUTION RISKS. THIS RESEARCH PROJECT SUPERSEDES IRRD RESEARCH PROJECT 500586. |