REPORT ON EXPERIENCE WITH THE USE OF INTERMEDIATE BLANKETING IN ROAD CONSTRUCTION IN BADEN-WURTTEMBERG

IN BADEN-WURTTEMBERG, INTERMEDIATE BLANKETING HAS EVOLVED FROM THE NECESSITY OF FINDING A SYSTEM OF CONSTRUCTION WHICH BY SIMPLE MEANS, WOULD REDUCE THE FROST SENSITIVITY OF ROAD STRUCTURES. THE GOOD RESULTS OBTAINED IN MANY COUNTRIES WITH THE USE OF HOT TARMAC FOR MAKING BITUMINOUS COATINGS SUGGESTED THE USE OF THIS MATERIAL ALSO IN BADEN-WURTTEMBERG ON A LARGE SCALE FOR IMPROVING FROST-BOUND ROADS. THE FORMER METHOD OF INTERMEDIATE BLANKETING TO IMPROVE FROST RESISTANCE BY THE SIMPLE APPLICATION OF A 30-40 KG/SQ.M BLANKET HAD BEEN FOUND INSUFFICIENT TO PREVENT THE PENETRATION OF SURFACE WATER INTO THE SURFACING AND SUBSTRUCTURE. SINCE 1965, AFTER RAISING THE ROAD VERGES AND ANY NECESSARY WIDENING, A BITUMINOUS COATING OF AT LEAST 7 CM THICKNESS OF HOT TARMAC WAS APPLIED AND REINFORCED WHERE NECESSARY TO 10-12 CM THICKNESS. THE SURFACING AND WEARING COAT WAS A 70 KG/SQ.M HEAVY ASPHALT CONCRETE LAYER. SUCH REINFORCEMENT OF THE ROADWAY EDGES BY HIGH OR SHALLOW CURB STONES LAID IN CONCRETE HAS BEEN FOUND HIGHLY EFFECTIVE. THIS FORM OF INTERMEDIATE BLANKETING WAS FOUND TO BE GOOD, AFTER INITIAL TROUBLES, SO THAT THE SYSTEM IS NOW IN GENERAL USE IN BADEN-WURTTEMBERG. THE DECISIVE FACTOR WAS THE FACT THAT LENGTHS CONSTRUCTED IN THIS MANNER SHOWED NO FURTHER SIGNS OF DAMAGE, REMAINED CONTINUOUS IN STRUCTURE AND IN NO WAY DETERIORATED IN APPEARANCE. THE POSSIBILITY OF USING MATERIAL OF LOCAL ORIGIN FOR A LARGE PART OF THE ROAD STRUCTURE IS PARTICULARLY IMPORTANT FOR THIS REGION WHICH IS DEFICIENT IN STONE. /RRL/

• Supplemental Notes:
  • Vol 27, No 3, PP 70-78, 13 FIG, 1 TAB
• Authors:
  • Mauch, W
• Publication Date: 1965-5

Media Info

• Serial:
  • Bitumen /Germany/

Subject/Index Terms

• TRT Terms: Asphalt concrete; Bituminous macadam; Bituminous materials; Coatings; Curbs; Durability; Frost susceptibility; Highways; Material reinforcement; Pavements; Reduction (Chemistry); Road construction; Roadside; Surfacing
• Geographic Terms: Baden-Wurttemberg (Germany)
• Old TRIS Terms: Highway pavement; Intermediate blanketing; Reduction
• Subject Areas: Highways; Maintenance and Preservation; Materials; Pavements;

Filing Info

• Accession Number: 00210551
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: Feb 15 1994 12:00AM