GRANULAR SUBGRADES, SUBBASES AND ROADBASES

EXPLANADAS MEJORADAS, SUB-BASES Y BASES GRANULARES

THIS REPORT DEALS WITH THE CONSTRUCTION OF GRANULAR LAYERS, AND EXCLUSIVELY WITH FLEXIBLE PAVEMENTS. COMMENTS ARE MADE ON THE DEFINITIONS OF GRANULAR ROADBASES, SUBBASES AND SUBGRADES, ON THE ROLE OF EACH COURSE, AND ON THE CONDITIONS THAT MUST BE FULFILLED BY THE GRANULAR MATERIALS USED. ATTENTION IS DRAWN TO THE IMPORTANCE OF GRADING, OF THE RELATIVE ARRANGEMENT OF THE PARTICLES, THEIR SHAPE AND DIMENSIONS, THE CORRECT USE OF CURVES AND KNOWN GRADING ENVELOPES, FACTORS INFLUENCING THE STRENGTH, COMPACTION, STABILITY, LOAD DISTRIBUTION, ETC. A STUDY IS CONDUCTED OF THE IN-SITU USE OF MATERIALS AND OF THE PROBLEMS ARISING FROM THE ABSENCE OF CONTROL OF THE GRADING SELECTED. GUIDELINES ARE GIVEN FOR SPREADING, LEVELLING, COMPACTION, AND FOR THE CHOICE OF THE MECHANICAL EQUIPMENT BEST ADAPTED TO EACH CASE AS A FUNCTION OF THE TYPE OF SOIL. MENTION IS MADE OF THE BEHAVIOUR OF GRANULAR LAYERS INCORPORATED IN THE PAVEMENT STRUCTURE. FOR THE COVERING ABSTRACT SEE IRRD ABSTRACT NO 106958.

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  • Accession Number: 01293893
  • Record Type: Publication
  • Source Agency: Institut Francais des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
  • ISBN: 84-7146-016-5
  • Files: ITRD
  • Created Date: Nov 21 2010 4:21AM