IS GRADED AGGREGATE BASE THE SOLUTION IN FROST AREAS?
Design considerations are reviewed which are applicable to areas where severe frost action is to be expected. The significance is cited of the strength loss that might occur in subgrades and in some base courses during the spring thaw. Data are presented which indicate that unless graded aggregate bases have little or no dust (minus No. 200) and are provided with an even more permeable drainage layer above, they might not be expected to perform well in frost areas. The argument is considered that graded aggregate base, while helping to protect against the effects of subgrade weakening during the spring thaw, may itself be weakened during thawing and may itself contribute to premature pavement distress. Design features are suggested that will counter this, and a plea is made for the support research in areas where a sound technical basis for the counter arguments may be lacking.
- Proceedings from A Conference on Utilization of Graded Aggregate Base Materials in Flexible Pavements, held March 25-26, 1974, Oakbrook, Illinois.
National Crushed Stone Association1415 Elliot Place, NW
Washington, DC United States 20007
- Johnson, T C
- Publication Date: 1974-3
- Features: Figures; References;
- Pagination: 19 p.
- TRT Terms: Aggregate gradation; Aggregates; Base course (Pavements); Defects; Dust; Frost; Pavement design; Pavement distress; Pavements; Research; Subgrade (Pavements); Thaw
- Subject Areas: Geotechnology; Highways; Pavements; Research;
- Accession Number: 00265135
- Record Type: Publication
- Report/Paper Numbers: Conf Paper
- Files: TRIS
- Created Date: Feb 11 1975 12:00AM