Regulation of the Properties of Asphalt Concrete Pavement by the Use of Porous Mineral Powders

The use of porous mineral powders, including industrial waste, is the perspective direction in the solution of a problem of receiving quality asphalt. The use of such fillers can promote increased heat resistance, crack resistance, and shift resistance of a road composite. It also saves on preparation of asphalt mix and reduces environmental pollution. Porous fine fillers make for stronger structuring rather than denser. Micropores differ the high adsorptive potential. Therefore, a considerable part of the surface-active components of bitumen are occluded. Conversely, bitumen impoverishment by easy fractions, which is caused by a selective filtration, can accelerate processes of aging of bitumen considerably. Therefore, inclusion in road construction of such raw materials causes the necessity of its comprehensive investigation. In this work, features of interaction of porous mineral materials with bitumen are described. The analysis of influence of porous mineral powder from a ceramsite dust on crack resistance of asphalt and bitumen aging in a composite is carried out. It is shown that mineral powder from expanded clay allows increased crack resistance of asphalt. However, it is necessary to control its influence on the intensity of material aging.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 224-228
  • Monograph Title: Design, Analysis, and Asphalt Material Characterization for Road and Airfield Pavements

Subject/Index Terms

Filing Info

  • Accession Number: 01535065
  • Record Type: Publication
  • ISBN: 9780784478462
  • Files: TRIS, ASCE
  • Created Date: Jul 21 2014 3:02PM