Overlay Tester (Texas)

Overlay Tester (Texas)

Product Options

  Part Number & Name Price QTY
Asphalt Overlay Tester, 120V 60HzHA-5600
Asphalt Overlay Tester, 120V 60Hz
Asphalt Overlay Tester, 220V 50HzHA-5600.5F
Asphalt Overlay Tester, 220V 50Hz
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Overlay Tester (Texas)

Supports the following standards: ASTM WK26816, CS-TOT

In recent years many mixture design methods have produced materials that are stiffer, leaner and more resistant to rutting, however, such materials are often more susceptible to fatigue and reflection cracking. The Texas Overlay Tester (CS-TOT) was designed to simulate the expansion and contraction movements that occur in the vicinity of joints or cracks and which result in reflection cracking in overlays. With the CS-TOT it is possible to characterize both the crack initiation and crack propagation properties of asphalt mixtures. Cox & Sons has developed the CS-TOT, which is a dedicated, state-of-the-art piece of equipment for carrying out this test.


  • Dedicated no compromise Texas Overlay machine
  • Designed according to the proposed ASTM
  • Integral surface-mounted, touch-screen control
  • Double GSF cold rolled container slides for ultra accurate inline sample deformation
  • Intelligently designed specimen gluing and “zero stress” carrying frame
  • Fitted with high performance hydraulic actuator and powerpack
  • Ergonomically designed for easy operation
Measurement Interval0.01
Waveform TypeCyclic triangular and constant displacement or a combination
Maximum Displacement0.025 to 0.2 (0.6 to 5.1mm)
Resolution of Displacement Measurment0.00004" (1 μm)
Control Loop Rate>1000 Hz
Load Cell Capacity5500 lb (25kN)
Load Cell Accuracy0.25 %FS
Cycle Time5 to 1000 s
Cycle Time Measurement Resolution0.1%
Temperature Control Range23 to 104°F (-5 to 40°C)
Temperature Control Accuracy±0.9°F (0.5°C)
Ambient Temperature Range59 to 86°F (15 to 30°C)
Test End Conditions(0 to 100)% load reduction and/or (0 to 10000) cycles
Specimen Dims Length: Height: Width:5.9 ± 0.08" (150 ± 2mm) 1.5 to 2 ± 0.02" (38 to 50 ± 0 5mm) 3" (76mm)
Plate Dims Length: Height: Width:11.8" (300mm) 0.51 or 0.75" (13 or 19mm) 5.9" (150mm)
Base Plate MaterialStainless steel
Base Plate Hardness (Brinell)95 (Not lower than that of 6061-T6 aluminum)
Plate Groove Depth x Width0.059 x 0.051" (1.5 x 1.3mm)
Plate Groove Separation0.25" (6.35mm)
Initial Separation of Plates0.079" (2mm)
Vertical movement of sample (% of crack opening)<3
Dimensions (WxDxH)62" x 25" x 43" (1580 x 650 x 1100mm)


  Part Number & Name Price QTY
Disc-shaped, compact tension fixture
Semi-circular bending (-5°C to +40°C)
“Zero Stress” carrying frame to align the two base plates and fix the specimen prior to testing with specimen alignment
0.25" (6.25 mm) spacer bar for plate separation and alignment
10 lb (4.5kg) weight
Calibration kit
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Manuals, Data Sheets & Safety Data Sheets
HA-5600-Overlay-Tester (Data Sheet PDF)


ASTM WK26816

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