01333327

Component

https://doi.org/10.3141/2212-11

http://scholar.google.com...hrie&publication_year=2011

The objective of this research was to analyze the strength and deformation characteristics of a cement-treated base (CTB) constructed with full-depth reclamation, microcracked, and then surfaced with a single chip seal. In this field study, strength characteristics of the CTB layer were determined at the time of construction, and both strength and deformation characteristics were evaluated after 9 months of low-volume, heavy truck traffic. Observed distresses at 9 months included transverse cracking, rutting, and chip seal joint failure. The loss of the chip seal was caused by poor chip seal construction practices and not a deficiency in the CTB layer. The average ride qualities in and out of the wheelpath were in the fair ride category; the roughness was not likely caused by trafficking but probably resulted from construction or climatic factors. Structural testing performed after 9 months of service indicated that CTB stiffness and modulus were greater than the values measured after microcracking at the time of construction, indicating continued strength gain. However, trafficking over the 9 months had caused significantly lower stiffness in the wheelpaths than between the wheelpaths. The average unconfined compressive strength (UCS) of the cores tested at 9 months did not differ significantly from the average UCS of the field-compacted specimens tested at 6 weeks. Recommendations for improved CTB performance include the use of a thicker, stiffer, or both, CTB layer to ensure a smooth CTB surface during construction and application of a double chip seal or equivalent.

01350333

11-2850

English

pp 100-109

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309167260

Print

Figures (2) ; Photos (5) ; References (20) ; Tables (3)

Cement treated soils; Chip seals; Compressive strength; Deformation; Full-depth reclamation; Microcracking; Modulus of elasticity; Reclaimed asphalt pavements; Ride quality; Roughness; Rutting; Stiffness; Transverse cracking

Cement treated bases

Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I42: Soil Mechanics

PRP, TRIS, TRB

Feb 17 2011 6:19PM

• Applications and Performance of Geosynthetic-Reinforced Soil Abutments on Soft Subsurface Soil Conditions
• Estimating Embankment Settlement from Piezocone Penetration Test Data: Case Study
• Evaluation and Mix Design of Cement-Treated Base Materials with High Content of Reclaimed Asphalt Pavement
• Field Testing and Analyses of a Batter Pile Group Foundation Under Lateral Loading
• Forensic Investigation and Remediation of Pavement Performance Affected by Groundwater Seepage: Case History in Virginia
• Impact of Moisture Content and Density on Stiffness-Based Acceptance of Geomaterials
• Influence of Mineralogy and Plasticity Index on Stabilization Effectiveness of Expansive Clays
• Lateral Resistance of Short Rock Sockets in Weak Rock: Case History
• Long-Term Monitoring of Culvert Load Reduction Using an Imperfect Ditch Backfilled with Geofoam
• Mechanisms of Distress Associated with Sulfate-Induced Heaving in Lime-Treated Soils
• Pile Load Test and Implementation of Specifications of Load and Resistance Factor Design: Case Study of Caminada Bay Bridge Project in Louisiana
• Water Jetting to Mitigate Defects in Drilled Shafts: Laboratory Investigation