Pavement Engineering

GESTRA’s pavement engineering services include field and laboratory evaluation, and engineering services for highway pavement, airport runways and parking lots as required by Wisconsin Department of Transportation (WisDOT), Illinois Department of Transportation (IDOT), Federal Highway Administration (FHWA) and National Cooperative Highway Research Program (NCHRP).

Field Evaluation

Pavement Surface Evaluation Rating (PASER) & Pavement Failure Investigation
Pavement Profiling, Roughness & Skid-resistance Testing
Falling Weight Deflectometer (FWD) Testing
Dynamic Cone Penetration (DCP) Testing
Sub-surface Exploration (Drilling Services)
Pavement (Asphalt & Concrete) Coring
Ground Penetrating RADAR (GPR) Pavement Layer Evaluation
Profilograph
Construction Material Testing and Inspection

Laboratory Evaluation

Subgrade and Base Course Testing (Index properties/gradation/permeability)
Maximum Density (Asphalt & Soil)
Specific Gravity (Asphalt & Soil)
Marshal Stability (Asphalt & Soil)
Concrete Compression
Asphalt Content

Engineering Services

Pavement Analysis & Design (MEPDG, WisPAVE, WAPA, IDOT Spreadsheet & AASHTO 1993)
Material Characterizations (Asphalt, Concrete & Aggregate)
Subgrade Evaluation
Superpave Mix Design
Remaining Life Prediction of Existing Pavement
Back Calculation of Layer Moduli
Pavement Rehabilitation Recommendation
Drainage Layer System Design & Evaluate Filter Media
Statistical Analysis & Probabilistic Design.