Home  /  Services   /   Concrete Scanning

Bridge & Road Inspections

infrastructure inspectionAsphalt Layer Thickness Mapping, shown above.

Safely coring through a wall or effectively assessing the condition of a road or bridge requires accurate data on subsurface features.

Traditional inspection methods, when applied on their own, lack in effectiveness.  Visual data is highly subjective and influenced by technician training and interpretation.  Coring is often costly and fails to provide a quantifiable, representative sample of the entire inspection area.  
In response to these challenges, municipalities and engineering firms across the country are beginning to incorporate  non-destructive technologies such as Ground Penetrating Radar (GPR) and CCTV camera (sewer video) into the inspection process to supplement traditional techniques. Whether you need to locate conduits before cutting concrete, assess pipe condition or map deterioration along a bridge or road, these technologies provide the level of insight required to make truly informed decisions.

Our infrastructure inspection services include:

  • Bridge and road inspection: Concrete deterioration analyses, reinforcement bar amplitude indexing, reinforcement bar and density mapping, post tension cable and bridge structural imaging, PCC and asphalt thickness measurements, road granular base depth measurements, concrete crack and dowel locating with asphalt overlay
  • Concrete scanning: Concrete pipe thickness measurements and deterioration, new concrete structure inspection, ballast wall void detection, conduit tracing
  • CCTV Camera Pipe Inspection: Performance monitoring, locating cracks, breaks, sags and obstructions, investigating flow conditions and blockages, inspecting pipe walls, assessing corrosion and leak areas

A Signal Amplitude Attenuation Contour Map created with GPR data, indicates areas of potential bridge deck deterioration - image below and above.

What is Ground Penetrating Radar (GPR)?

Ground Penetrating Radar (GPR) is a non-destructive technology that is used to effectively analyze structures, assess bridge deck deterioration, measure asphalt thickness and determine the subsurface conditions of bridges, roads and highways. 
It works by transmitting high frequency radio waves into the ground or structure and analyzing the reflected energy to create a profile of the subsurface features. The reflections are caused by a contrast in the electrical properties of subsurface materials which can be indicative of changes in water content, void spaces in the ground, rebar or post tension cable corrosion, asphalt deterioration and other factors.
GPR surpasses many limitations of traditional inspection methods. For example, chain dragging is ineffective on asphalt-overlaid decks while hammer sounding is limited to areas where possible deterioration is apparent. Leveraging GPR takes the guesswork out of identifying locations for destructive testing which has historically been accomplished through visual inspection, often failing to provide a representative sample of the bridge or road survey area. 

Cross-sectional Ground Penetrating Radar profile of asphalt thickness measurements, concrete slab interfaces, granular base measurements and surface cracking.

Contact us for more information or to request an estimate.