Benchmark Service: Pavement Construction Phase Services
Issue:
Aging infrastructure can pose significant challenges, especially in environments subjected to heavy, continuous use. Benchmark provided construction observation and inspection services for the rehabilitation of pavement at two neighboring distribution facilities. The project involved repaving approximately 8,700 square yards of asphalt, addressing the deteriorated conditions of the existing pavement. After more than a decade of use, the asphalt exhibited extensive raveling and cracking, necessitating comprehensive restoration to ensure safety and functionality. These issues were primarily attributed to the intense traffic demands, with heavy-duty trucks continuously entering and exiting the facilities, which operate 24/7. The deteriorated pavement not only jeopardized operational efficiency but also posed safety risks and necessitated immediate corrective action.
Solution:
To address these challenges, Benchmark deployed a dedicated staff consultant for full-time on-site observation and budget management throughout the construction phase. Collaboration was a key element of this undertaking—a representative from the contractor was also present to maintain clear communication with the client, ensuring alignment at every step of the process.
Removal and Evaluation
The rehabilitation process began with the removal of the aging asphalt pavement using a milling machine. Following this, the underlying stone base was examined through proof rolling with a loaded dump truck to identify and address instability. Several sections were deemed unsuitable and required undercutting to create a solid foundation for the new pavement.
Stabilization and Reconstruction
To stabilize these problematic areas, an additional 6 inches of material were milled out and replaced with hot-mix asphalt binder course. This was applied in two-inch lifts, ensuring proper compaction and a sturdy base for subsequent layers.
Pavement Installation
With the foundation stabilized, the first lift—a 3-inch asphalt binder layer—was installed and allowed a full day to cool, promoting stability and durability. A tack coat was then applied to this binder, followed by the installation of a 2-inch surface lift. Advanced equipment, including a vibratory drum compactor and a rubber tire roller, was utilized to achieve optimal compaction and pavement density.
Quality Assurance
Rigorous quality control measures were implemented, including on-site density testing by a technician to ensure adherence to specifications. Additionally, samples were taken at the plant to ensure air voids, voids in mineral aggregate, and gradation aligned with the job mix formula that was approved for use.
Impact:
By addressing unstable areas in the stone base and implementing a methodical paving process, they ensured that the new pavement could handle the anticipated high traffic loads. The focus on quality assurance during construction further guaranteed that the asphalt mix adhered to the highest standards.
With proper preventive maintenance, these newly rehabilitated pavements are expected to offer long-term serviceability, reducing the need for frequent repairs and associated costs. This project highlights Benchmark's commitment to delivering solutions that are not only functional but also durable and tailored to the client's operational needs.
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| A vibratory drum compactor was utilized to achieve optimal pavement density. | On-site density testing by a technician for quality control. |