USE OF POROUS STONE IN BITUMINOUS PAVEMENTS. DURABILITY AND PERFORMANCE OF BITUMINOUS HIGHWAY MATERIALS, HATFIELD POLYTECHNIC, 3-4 APRIL 1989

This paper describes tests undertaken to ascertain the effects of porosity upon the following characteristics of different basaltic rocks from the faroe islands, Norway, Sweden and Iceland: adhesion; drying time; adsorption; freeze/thaw breakdown; asphalt absorption; indirect tensile strength; and adsorption of Marshall samples. Effective and total porosity were calculated from the density and water absorption measurements. The test programme did not reveal whether porosity has a positive or negative effect on adhesion properties directly, but it is evident that porous aggregates demand more asphalt because of absorption, which is strongly correlated to porosity. No significant correlation was found between porosity and: (a) adsorption of aggregates and Marshall samples; (b) breakdown of aggregates and indirect tensile strength after a freeze/thaw test or (c) drying time of aggregates. The general conclusion is that porosity alone does not exclude use of aggregate and it is possible to make good road surfacings out of porous aggregate if higher production costs and strict production control are accepted. For the covering abstract of this conference see IRRD 823743.

• Corporate Authors:

  Hatfield Polytechnic, England

  School of Engineering, College Lane, P.O. Box 109
  Hatfield, Hertfordshire,   England 
• Authors:
  • PETURSSON, P
• Publication Date: 1989

Language

• English

Media Info

• Pagination: 11 p.

Subject/Index Terms

• TRT Terms: Absorption; Adhesion; Adsorption; Aggregates; Basalt; Bitumen; Conferences; Drying; Freeze thaw durability; Porosity; Strength of materials; Tensile properties; Water
• Uncontrolled Terms: Tensile
• Geographic Terms: Iceland; Norway; Sweden
• Subject Areas: Construction; Data and Information Technology; Geotechnology; Materials;

Filing Info

• Accession Number: 00498693
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM