THE MEASUREMENT OF THE SURFACE TEXTURE OF STONES WITH PARTICULAR REGARD TO THE EFFECT ON THE FRICTIONAL PROPERTIES OF ROAD SURFACES. VOLUME I - TEXT. VOLUME II - FIGURES AND TABLES

A theoretical and laboratory study of the frictional behaviour of rubber sliding on roadstones is described. A theory of hysteretic friction devised by the author is described. The surface texture of stone was analysed into A number of components. The coefficient of friction of each component was predicted by use of surface geometry and the authors' mechano-lattice analogy. The mechano-lattice analogy was also used to study the effect of a damping factor, Poisson's ratio and the depth of rubber and the shape of the asperities on the friction and on the disruptive stresses in the rubber sliding on the asperities. A stylus device is described which was developed to measure the three dimensional surface texture of roadstones. The theory of hysteretic sliding was largely validated using the stylus measurements in conjunction with friction tests on A number of roadstones. It is shown by the results of A factorial experiment on bombo basalt that the coefficient of water-lubricated friction decreases more when any abrasive present during polishing decreases in size or increases in hardness. /TRRL/

• Corporate Authors:

  University of New South Wales

  Gate 9, High Street
  Kensington, New South Wales  Australia  2052
• Authors:
  • Yandell, W O
• Publication Date: 1970-11

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 71 p.

Subject/Index Terms

• TRT Terms: Aggregates; Basalt; Coefficient of friction; Damping (Physics); Evaluation and assessment; Forecasting; Friction; Hardness; Hysteresis; Lubrication; Mathematical models; Measurement; Measuring instruments; Poisson ratio; Polished aggregates; Rubber; Stone; Stresses; Texture
• Old TRIS Terms: Frictional properties; Poissons ratio
• ITRD Terms: 4577: Aggregate; 6155: Apparatus (measuring); 4183: Basalt; 5460: Coefficient of friction; 9020: Evaluation (assessment); 132: Forecast; 5452: Friction; 5449: Hysteresis; 3839: Lubrication; 6473: Mathematical model; 6136: Measurement; 7494: Rubber; 3053: Surface texture
• Subject Areas: Geotechnology; Highways; Pavements; I36: Aggregates;

Filing Info

• Accession Number: 00164335
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS
• Created Date: Jan 13 1978 12:00AM