A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluation of Premature PCCP Longitudinal Cracking in Colorado
This report presents an evaluation of several portland cement concrete pavements with premature longitudinal cracking. All of the locations discussed are in Region 1 of the Colorado Department of Transportation (CDOT). Included in this report is an overview of the causes of the premature longitudinal cracking, a description of field and laboratory investigations, and a list of strategies to eliminate such occurrences. Although there were some isolated cases of differential settlements related to the high swell potential (high PI/lower Rvalue) of the subgrade soil and/or poor subgrade compaction, this study found the shallow depth of the longitudinal saw-cuts at the shoulder joint to be the main reason for longitudinal cracking. Malfunctioning paver vibrators and unsuitable soils also contributed to the problem. The tests also proved that the wider slab design (14-foot slab) was not a contributing factor. Implementation: This study resulted in 2 new specifications: (1) Requiring the engineer to measure saw-cut depth at intervals of 1 per 1/10 of a mile (528 ft.). (2) Requiring paving contractors to equip their paving machines with vibrator monitoring devices.
Evaluation of Premature PCCP Longitudinal Cracking in Colorado
This report presents an evaluation of several portland cement concrete pavements with premature longitudinal cracking. All of the locations discussed are in Region 1 of the Colorado Department of Transportation (CDOT). Included in this report is an overview of the causes of the premature longitudinal cracking, a description of field and laboratory investigations, and a list of strategies to eliminate such occurrences. Although there were some isolated cases of differential settlements related to the high swell potential (high PI/lower Rvalue) of the subgrade soil and/or poor subgrade compaction, this study found the shallow depth of the longitudinal saw-cuts at the shoulder joint to be the main reason for longitudinal cracking. Malfunctioning paver vibrators and unsuitable soils also contributed to the problem. The tests also proved that the wider slab design (14-foot slab) was not a contributing factor. Implementation: This study resulted in 2 new specifications: (1) Requiring the engineer to measure saw-cut depth at intervals of 1 per 1/10 of a mile (528 ft.). (2) Requiring paving contractors to equip their paving machines with vibrator monitoring devices.
Evaluation of Premature PCCP Longitudinal Cracking in Colorado
A. Ardani (author) / S. Hussain (author) / R. LaForce (author)
2003
48 pages
Report
No indication
English
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