Accession Number : AD0753033

Title :   Definition of Bearing Capacity, Stability, and Fine-Particle Content of Gravels for Subgrades and Their Determination in the Laboratory (Definition de la Portance, de la Stabilite et de la Teneur en Elements en Laboratoire),

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s) : Recordon,E. ; Rechsteiner,G.

Report Date : OCT 1972

Pagination or Media Count : 14

Abstract : The foundation materials should be insensitive to the action of frost, easily compacted, and low in fine-particle content. It is shown that sands and silts are the most sensitive because they contain a large amount of fine constituents and are rather permeable. The clays are less sensitive as they are very slightly permeable, and the gravels, mixtures of gravel and sand, are not sensitive at all if they contain less than 3% in fine constituents (gravel I). Gravels II (containing 3-10% of fine constituents) are slightly sensitive to freezing. It is for this reason that the new standard introduces new quality criteria and new tests which make it possible to establish that their loss in bearing capacity due to freezing will remain sufficiently slight to render them acceptable. The laboratory tests undertaken on these materials included compactification, CBR tests, and a test to determine fine-constituent content. (Author)

Descriptors :   (*CONSTRUCTION MATERIALS, FOUNDATIONS(STRUCTURES)), (*ROADS, FREEZING), LOADS(FORCES), STABILIZATION, PARTICLE SIZE, PRESSURE, MOISTURE, COMPRESSIVE PROPERTIES, ACCEPTABILITY, TEST METHODS, SWITZERLAND

Subject Categories : Civil Engineering
      Construction Equipment, Materials & Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE