Abstract:
An investigation was made to determine if wear resistance should be included as a design criterion for unsurfaced stabilized soil roads. Two devices were developed for applying an abrading force on soil specimens stabilized with cement, lime, and asphalt in various amounts. The specimens were compacted in a specially constructed rectangular mould (4" x 4.8" x 3") which had a volume equal to the standard cylindrical mould used in soil analyses (1/30 cu.ft.) and with a rectangular shaped hammer (5.5 lbs). One abrasion device consisted of loaded wheels rotating over specimens to simulate rolling abrasion. After a number of variations made in this device it was concluded that such a device was impractable. The device did produce relative abrasion of the specimens but no meaningful measurements of abrasion could be obtained; therefore, this device was abondoned. The second device applied attractive abrasive force to the specimens in which a specimen was loaded against a stationary 'mounted rotating grinding wheel. Abrasion was measured by the depth of penetration into the specimen at various time intervals for a period of 10 minutes. All data were consistent and were statistically different with a confidence level of 90% or better. In each of the stabilized series the same amount of agent corresponded with the greatest wear resistance and the greatest strength. Since a design of a stabilized soil mixture is generally based upon the amount of agent which producers the highest strength, it would appear that wear resistance as such need not to be considered in the design because maximum wear resistance would be obtained using the strength criterion. Further, this device could possibly be used as a substitute or at least a supplement to the standard strength tests presently used as design criterion for stabilized soil mixtures.
Page(s):
83-92
DOI:
DOI not available
Published:
Journal: Journal of Engineering and Applied Sciences, Volume: 6, Issue: 2, Year: 1987