EXPERIMENTS AND THEORIES ON CONCRETE TECHNOLOGY: PART 1 - MIX-DESIGN, MANUFACTURE AND LAYING OF CONCRETE

EXPERIENCES ET THEORIES SUR LA TECHNOLOGIES DU BETON: 1ERE PARTIE - COMPOSITION, FABRICATION ET MISE EN OEUVRE DU BETON

The mix design of concrete must fulfil a number of requirements such as mechanical strength and workability, taking into account the surface effect of moulds and laying techniques. Using the state of compaction as a criterion, the author investigates the optimum grading, but the problem involves more than one factor. A number of grading curves are recommended, and the Caquot method is discussed taking into account the reciprocal wall effect between aggregates. To be also taken into consideration are errors due to the heterogeneity of the mixture. The control of concrete during manufacture must also take account of the volume of the sample taken and its surface/volume ratio, mixing, transport and laying. To fulfil this aim rheological aspects must be compared to methods of measuring workability. The factors which influence the characteristics of fresh concrete are internal friction and cohesion. Vibration of concrete reduces or cancels internal friction and cohesion: liquid state occurs, which facilitates laying and compaction vibration propagation and its effects are studied, taking account of grading and the selective effect of frequencies. (TRRL)

• Corporate Authors:

  Societe de Diffusion de Tech du Bat et de Trav Pub

  9 rue la Perouse
  Paris 16e,   France 
• Authors:
  • L'Hermite, R
• Publication Date: 1979-7-8

Language

• French

Media Info

• Features: Figures;
• Pagination: p. 169-191
• Serial:
  • Annales de l'Institut Tech du Batiment Travaux Pub
  • Issue Number: 374
  • Publisher: Societe de Diffusion de Tech du Bat et de Trav Pub

Subject/Index Terms

• TRT Terms: Coefficient of internal friction; Cohesion; Compaction; Concrete; Design; Fresh concrete; Heterogeneity; Highway grades; Homogeneity; Internal friction; Manufactures; Mix design; Right of way (Land); Samples; Strength of materials; Surveillance; Vibration; Workability
• Uncontrolled Terms: Design criteria; Laying; Particle size distribution
• Old TRIS Terms: Grading curves
• ITRD Terms: 5775: Coefficient of internal friction; 5903: Cohesion; 3686: Compaction; 5904: Compaction (state of); 4755: Concrete; 4750: Fresh concrete; 5916: Homogeneity; 3623: Laying; 3647: Manufacture; 4714: Mix design; 6200: Particle size distribution; 5544: Strength (mater); 9101: Surveillance; 5558: Vibration; 5941: Workability
• Subject Areas: Design; Highways; Materials; Planning and Forecasting; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00311362
• Record Type: Publication
• Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
• Files: ITRD, TRIS
• Created Date: Jul 22 1980 12:00AM