GRAVEL-CEMENT: (1) MECHANICAL AND PHYSICAL CHARACTERISTICS - RESEARCH ON METHODS OF DETERMINING THE THE TIME OF WORKABILITY OF GRAVEL-CEMENT

GRAVES-CIMENT: 1) CARACTERISTIQUES MACENIQUES ET PHYSIQUES- RECHERCHE SUR LES MOYENS DE DETERMINATION DU DELAI DE MANIABILITE DES GRAVES-CIMENT

Because cement is a rapidly setting hydraulic binder, gravel-cement technique has always encountered in-situ dipficulties: difficult and incomplete compaction because of the stiffening of the material, complete lack of ease of use to meet hazards on site (rain, breakdown of machinery). It was therefore necessary to characterize the workability time of gravel-cement and to study means of increasing it as required. Using results of a study of hydration heat and scanning electron microscopy observations during early age, the authors show the mechanism of cement hydration (standardized and special binders) in a gravel-cement medium. Simultaneously the dynamic non-destructive testing of fresh samples enables the speed of setting of gravel-cement to be evaluated. It is therefore possible to define the workability time of gravel-cement as the time during which gravel-cement can be laid without the long-term strength being markedly altered. Special binders were studied together with the addition of retarders (TRRL)

• Corporate Authors:

  Laboratoire Central des Ponts et Chausees (LCPC)

  Boulevard Lefebvre 58
  Paris Cedex 15,   France  F-75732
• Authors:
  • PAUTE, J L
  • Alexandre, J
• Publication Date: 1978-3-4

Language

• French

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 96-110
• Serial:
  • Bulletin de Liaison des Lab des Ponts et Chaussees
  • Issue Number: 94
  • Publisher: Laboratoire Central des Ponts et Chausees (LCPC)

Subject/Index Terms

• TRT Terms: Aggregates; Base course (Pavements); Cement; Chemical composition; Compaction; Continuously graded aggregates; Field tests; Gravel; Heat; Hydration; Hydraulic binders; Measurement; Mechanical properties; Microscopes; Physical properties; Retarders (Concrete); Soil stabilization; Stabilized materials; Surveillance; Time; Ultrasonics; Workability
• Old TRIS Terms: Insitu methods
• ITRD Terms: 4577: Aggregate; 4758: Cement; 3686: Compaction; 4598: Continuously graded aggregate; 6743: Heat; 7195: Hydration; 6136: Measurement; 6790: Microscope; 4727: Retarder (concrete); 3688: Roadbase stabilization; 5937: Structure (physicochem); 9101: Surveillance; 5414: Time; 6739: Ultrasonic; 5941: Workability
• Subject Areas: Construction; Geotechnology; Highways; Materials; I33: Other Materials used in Pavement Layers;

Filing Info

• Accession Number: 00309228
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: May 21 1980 12:00AM