COMPOSITION BITUMINEUSE DE TYPE MASTIC POUR L'ENROBAGE DE PIPELINES

• Main Author: TERENCE REGINALD JOHN FABB ET JOHN VINCENT HEYES
• Format: Patent
• Language: French
• Published: 04.02.1977
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; BLASTING; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; ENGINEERING ELEMENTS AND UNITS; FILLING PASTES; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INKS; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PIPES; POLISHES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THEIR PREPARATION OR CHEMICAL WORKING-UP; THERMAL INSULATION IN GENERAL; USE OF MATERIALS AS ADHESIVES; USE OF MATERIALS THEREFOR; WEAPONS; WOODSTAINS

1494279 Mastic asphalt BRITISH PETROLEUM CO Ltd 30 June 1976 [10 July 1975] 29042/75 Headng C3N A mastic asphalt, suitable for coating pipelines, comprises 8-22% wt. bitumen, 8-25% wt. of filler passing a 75 microns sieve and 53-84% wt. of aggregate in the grading range from larger than 75 microns to a maximum particle size of 2À36-37À5 mm., the percentages being by total weight of bitumen, filler, and aggregate, and the aggregate having a grading curve close to a modified Fuller curve for particles of the maximum particle size chosen, said modified Fuller curve being the Fuller curve recalculated to exclude material passing 75 microns. By "close to the Fuller curve" is meant that the end points of the grading curve are not more than 5% above or below the Fuller curve and that any intermediate point on the curve is not more than 10% above or below the Fuller curve. The aggregate larger than 75 microns may be sand with or without gravel. The filler may be limestone, Portland cement or lime. The bitumen may have a penetration of 10-100 at 25‹ C. and a softening point of 40‹-115‹ C. It may be petroleum bitumen or coal tar pitch or a mixture thereof, and may be straight run or blown. It may also contain some rubber. The optimum bitumen : filler is 1 : 1.