01088398

Component

https://doi.org/10.3141/2059-08

http://scholar.google.com...eese&publication_year=2008

To avoid the occurrence of early-age damage, cement-treated base (CTB) materials must be allowed to cure for a period of time before the pavement can be opened to early trafficking. As an alternative to specifying a set curing duration, a field-testing method was developed. The specific objectives of the project were to examine correlations between Clegg impact values (CIVs) determined using a heavy Clegg impact soil tester and rut depths measured in newly constructed CTB and to subsequently establish a threshold CIV at which unacceptable rutting should not occur. From data collected in the field and laboratory, one may conclude that successive wheel passes each cause less incremental rutting than previous passes and that rutting should be absent when the CIV exceeds 35. The maximum measured rut depth did not exceed 0.35 in. in this research, probably because of the high-quality limestone base material used to construct the CTB. In identifying a recommended threshold CIV at which CTB layers may be opened to early trafficking, researchers proposed a maximum tolerable rut depth of 0.10 in. for this project, which corresponds to a CIV of approximately 25. Because a CIV of 25 is also achievable within a reasonable amount of time under normal curing conditions and is consistent with earlier research, this threshold is recommended as the minimum average value that must be attained by a given CTB construction section before it can be opened to early trafficking.

01114749

English

pp 72-79

2008

Transportation Research Record: Journal of the Transportation Research Board

9780309113298

Print

Figures (3) ; Photos (4) ; References (15) ; Tables (2)

Base course (Pavements); Cement treated soils; Field tests; Laboratory tests; Rutting

Clegg impact hammer

Curing time; Rut depth

Geotechnology; Highways; I42: Soil Mechanics

TRIS, TRB, ATRI

Jan 29 2008 4:38PM

• Effects of Moisture and Time on Stiffness of Unbound Aggregate Base Course Materials
• Georgia’s Use of Lime in Full-Depth Reclamation
• Long-Term Performance of Chemically Modified Subgrade Soils in Indiana
• Material Factors That Influence Anisotropic Behavior of Aggregate Bases
• Permanent Deformation Behavior of Naturally Occurring Bituminous Sands
• Physicochemical Behavior of Cement Kiln Dust-Treated Kaolinite Clay
• Rapid Assessment of Cement and Fiber-Stabilized Soil Using Roller-Integrated Compaction Monitoring
• Results of Micro-Deval Test for Coarse Aggregates from Virginia Sources
• Shear Strength Characteristics of Recycled Glass
• Use of the Micro-Deval Test for Assessing Fine Aggregate Durability