TECHNICAL INTEREST OF HARD BITUMEN
INTERET TECHNIQUE DES BITUMES DURS
An attempt is made to justify the increased use of hard bitumen (penetration 25 degrees C lower than 80) in road construction in France. The reasons put forward are as follows: (1) the stiffness of bituminous mixtures increases with the hardness of the bitumen; (2) if hard bitumen is used in bituminous mixtures, a marked increase in their resistance to plastic deformations (tracking) is observed; (3) this trend is followed in other countries such as Austria, Spain, Italy, the Netherlands, Switzerland. The use of 180/220 bitumen, which ten years ago was common, is becoming rarer in all countries; (4) the only countries which do not seem to follow the general trend are those with severe winters where the risk of brittleness would be too great. /TRRL/
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Corporate Authors:
Laboratoire Central des Ponts et Chausees (LCPC)
Boulevard Lefebvre 58
Paris Cedex 15, France F-75732 -
Authors:
- SAUTEREY, R
- Publication Date: 1975-7-8
Language
- French
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 138-139
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Serial:
- Bulletin de Liaison des Lab des Ponts et Chaussees
- Issue Number: 78
- Publisher: Laboratoire Central des Ponts et Chausees (LCPC)
Subject/Index Terms
- TRT Terms: Bitumen; Bituminous mixtures; Deformation; Hardness; Pendulum tests; Plastic deformation; Plasticity; Road construction; Rutting; Stiffness; Temperature
- Uncontrolled Terms: Use
- Geographic Terms: France
- Old TRIS Terms: Tracking (Wheel)
- ITRD Terms: 4963: Bitumen; 4967: Bituminous mixture; 5595: Deformation; 8036: France; 5914: Hardness; 3665: Road construction; 3081: Rutting (wheel); 5931: Stiffness; 5544: Strength (mater); 9084: Use
- Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;
Filing Info
- Accession Number: 00149867
- Record Type: Publication
- Source Agency: Central Laboratory of Bridges & Highways, France
- Report/Paper Numbers: Analytic
- Files: ITRD, TRIS
- Created Date: Apr 13 1977 12:00AM