Transportation

Triad provided testing and construction observation services for the rehabilitation of the Tuscarora Tunnel. The scope of services included the following:

1. Concrete:

Cast-in-Place:

• Prior to concrete placement, Triad observed the formwork and reinforcing steel to ensure compliance with project plans.
• During concrete placement, Triad documented the concrete supplier, placement and consolidation methods, and weather conditions at the time.
• Composite samples were obtained.
• Testing of the composite samples included Slump (ASTM C 143), Air Content (ASTM C 231), and Temperature (ASTM C 1064), along with additional tests like unit weight.. View Full Project

Triad was contracted by various contractors to perform construction testing and inspection services on multiple sections of this major U.S. Highway upgrade.

Construction testing consisted of compaction testing on fill and backfill materials, concrete testing during concrete placement for bridge sub and super structures, site drainage features, and concrete paving, and sampling and materials testing on aggregates used for base stone and drainage applications. Laboratory testing for this project consisted of gradation testing and Atterberg limits tests on aggregates and compressive strength testing of concrete test cylinders. All construction testing and inspection services were controlled and monitored by the WVDOT,.. View Full Project