Military traffic, maintenance and parking areas are among the most heavily stressed infrastructure surfaces. They must withstand not only high static and dynamic loads, but also fuel exposure, oil contamination, abrasion, point loads and continuous vehicle traffic. The Camp Lejeune project in Jacksonville, North Carolina, demonstrates how a semi-flexible UHPC Phalt system can be used for these demanding conditions.
Camp Lejeune is a major Marine Corps base with extensive infrastructure for operations, training, maintenance and support of military units. In 2003, a new maintenance, storage and parking area was constructed for various types of military vehicles. The pavement had to be suitable for rubber-wheeled vehicles such as jeeps, Hummers, heavy-duty trucks and tractors, as well as tracked vehicles, tanks and armored personnel carriers.
The technical requirements for the pavement were correspondingly high. The structure had to prevent deformation, rutting and erosion under heavy static loads and continuous vehicle movement. At the same time, the surface had to reduce the penetration of fuels, lubricants and contaminated water into the sub-base in order to prevent damage to the supporting layers and reduce potential environmental impact. In addition, very high abrasion resistance was required because military vehicles generate substantial friction, shear and surface stress.
For this application, UHPC Phalt was installed as a semi-flexible, nearly joint-free and highly load-bearing surface system. The system combines the flexibility of an asphalt-based load-bearing skeleton with the high strength, density and mineral durability of a UHPC mortar. This creates a robust composite pavement structure that can offer significantly improved resistance to rutting, compression, abrasion and liquid ingress compared with conventional asphalt.
At Camp Lejeune, approximately 27,000 m² of UHPC Phalt was installed as a 5 cm thick wearing course. This layer was applied over a 7.5 cm bituminous asphalt layer and a 20 cm stone base course. The pavement structure combines high load-bearing capacity with relatively rapid installation and a nearly joint-free surface. For military facilities, this is a significant advantage because mission-critical areas require short construction periods, reduced downtime and robust long-term performance.
A key advantage of the system is its dense structure. Fuels, oils and lubricants have a significantly reduced ability to penetrate into the underlying pavement structure compared with open-textured or damaged conventional asphalt surfaces. This improves not only the technical service life of the pavement, but also reduces the risk of sub-base deterioration and environmentally relevant contamination. For maintenance and parking areas where operating fluids are regularly present, this property is of major importance.
UHPC Phalt also provides technical advantages under mechanical loading. The surface is designed to resist compression, impact, friction and abrasion. Military vehicles generate stress not only through high axle loads, but also through maneuvering movements, tracked contact, braking forces and concentrated stationary loads. A pavement for such areas must therefore be load-bearing, tough, dense and low-maintenance.
The Camp Lejeune project shows that UHPC Phalt can be a high-performance solution for military maintenance areas, vehicle parking zones, logistics areas, workshop zones and heavily loaded traffic surfaces. Compared with conventional asphalt or concrete solutions, the system provides a combination of high mechanical resistance, reduced liquid absorption, nearly joint-free construction and economic long-term use. For military infrastructure projects where operational readiness, durability and environmental protection are required at the same time, WPE-DK UHPC Phalt is a technically relevant protection and service-life extension system.
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