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PLASTICS LAYER PROTECTS ROAD FROM FROST

A MOBILE PLASTICS FOAM PRODUCTION PROCEDURE FOR USE IN COVERING ROADS WITH A FROST PROTECTIVE LAYER HAS BEEN DEVELOPED BY A FIRM IN LEVERKUSEN, GERMANY. IN THE NEW TECHNIQUE PLASTICS LAYERS OF ANY DIMENSIONS CAN BE PRODUCED CONTINUOUSLY ON THE SITE. TWO FOAM-PRODUCING COMPONENTS ARE MIXED TOGETHER AND IMMEDIATELY SPREAD IN LIQUID FORM STRAIGHT ON TO THE LEVELLED AND BITUMEN SEALED BED FROM A SPECIAL FOAM MAKING MACHINE RUNNING ON RAILS ON EITHER SIDE OF THE ROAD. AFTER ONLY A FEW SECONDS THE COMPONENTS REACT AND SWELL TO THE DESIRED CONSISTENCY, THUS PRODUCING A SEAM FREE AND LEVEL UPPER SURFACE. THE MACHINE PRODUCES AN UNBROKEN INSULATING LAYER 3 CM THICK AT A RATE OF ABOUT 6 CUBIC METERS PER MINUTE. SINCE ABOUT 20 CUBIC METERS OF POLYURETHANE FOAM ARE PRODUCED FROM ABOUT 1 CUBIC METER OF THE BASIC COMPONENTS THE SPACE REQUIRED FOR TRANSPORT CAN BE REDUCED TO ABOUT 5 PER CENT OF THAT REQUIRED FOR THE READY MADE SHEETS WITH A CORRESPONDING REDUCTION IN COSTS. /AUTHOR/