Our company, leveraging its central government-owned enterprise background and multiple high-level qualifications (including CMA certification and Comprehensive Class A testing qualification for highway engineering), possesses the capability to perform over 1,800 testing parameters. Our services cover the entire process from materials to structural entities. In terms of technical equipment, we possess advanced instruments such as a 20,000 kN computer-controlled compression-shear testing machine for rubber bearings, imported ground-penetrating radar (GPR), pavement inspection vehicles, and bridge inspection vehicles. Regarding independent research and development capabilities, we hold multiple patents, including a patent for a pavement strength tester used in highway testing technology and a patent for an asphalt performance testing device capable of simulating rainfall to evaluate the drainage performance of asphalt pavements.
Testing Products
Degree of Compaction
Bearing Capacity (Deflection)
Geometric Dimensions and Elevation
Roughness (Evenness)
Rutting Depth
Pavement Distress Condition
Skid Resistance Performance
Structural Layer Thickness
Cement Concrete Strength
Testing Items
Degree of Compaction:
Dry density, moisture content, particle size analysis (gradation), liquid limit, plastic limit, compaction test (to determine maximum dry density and optimum moisture content), field testing methods such as ring knife method, sand cone method, nuclear density gauge method.
Bearing Capacity (Deflection):
Resilient deflection value (unit: 0.01mm), Benkelman beam method, Falling Weight Deflectometer (FWD) method, dynamic/static load test (e.g., plate load test), subgrade reaction modulus (K-value), California Bearing Ratio (CBR), dynamic penetration test (light/heavy).
Geometric Dimensions and Elevation:
Pavement width, thickness, cross slope, longitudinal slope, centerline deviation, edge line deviation, elevation measurement (level, total station), cross-sectional dimensions (rutting zone, shoulder, etc.), structural layer thickness (core drilling method, radar method).
Roughness (Evenness):
International Roughness Index (IRI, unit: m/km), maximum gap of 3m straightedge (unit: mm), continuous profilometer testing, vehicle-mounted bump integrator (BPR), measuring points every 10m or 20m, continuous measurement.
Rutting Depth:
Maximum rutting depth (unit: mm), rutting width, rutting length, rutting depth ratio (depth change rate), Rutting Depth Index (RDI), laser profilometer, 3D laser scanner testing, statistical values every 10m.
Pavement Distress Condition:
Pavement distress types: cracks (longitudinal/transverse/alligator), potholes, raveling, depressions, rutting, corrugation, shoving, bleeding, patching, etc.; Pavement Distress Ratio (DR), Pavement Condition Index (PCI), statistical distress area and density every 10m or 100m, automated survey vehicle or manual inspection, image recognition + GPS positioning (recognition accuracy ≥ 90%).
Skid Resistance Performance:
BPN (British Pendulum Number, pendulum tester), texture depth (TD, sand patch method or laser method), Side Force Coefficient (SFC, side force coefficient tester), coefficient of friction (μ), one test point per 10m or 1000 m², testing under wet conditions, temperature correction.
Structural Layer Thickness:
Thickness of each structural layer (surface course, base course, subbase course), core drilling method (diameter typically φ100 mm), non-destructive testing with GPR, one test point per 1000 m², thickness deviation (allowable deviation: -5mm ~ +10mm).
Cement Concrete Strength:
Compressive strength (cubic specimen 150mm × 150mm × 150mm), flexural strength (small beam specimen 150mm × 150mm × 550mm), elastic modulus, core drilling strength (field core, φ100mm or φ150mm), rebound hammer method, ultrasonic-rebound combined method (non-destructive testing), at least one set of specimens (3 pieces) per 1000 m² or per shift, strength evaluation at standard age of 28 days.
Testing Standards
Degree of Compaction:
Ring knife method compaction degree, sand cone method compaction degree, nuclear density gauge method compaction degree, non-nuclear density gauge method compaction degree.
Standards: JTG F80/1-2017, JTG F10-2006, JTJ 034-2000, JTG E40-2007, JTG E60-2008
Bearing Capacity (Deflection):
Benkelman beam resilient deflection, Falling Weight Deflectometer (FWD), automatic deflectometer (high-speed continuous), plate load static load test (K30, Evd, Ev2).
Standards: JTG 3450-2019, JTG F80/1-2017, JTG/T J21-2011, JTG E60-2008
Geometric Dimensions and Elevation:
Centerline deviation, pavement width, longitudinal profile elevation, cross-sectional elevation (cross slope), structural layer thickness (core/radar), slope grade.
Standards: JTG F80/1-2017, JTG F10-2006, JTG F40-2004, CJJ 1-2008
Roughness (Evenness):
Maximum gap of 3m straightedge, continuous profilometer (profile class), vehicle-mounted laser roughness (IRI), bump integrator (BPR).
Standards: JTG 3450-2019, JTG F80/1-2017, JTG F40-2004, JTG E60-2008, JTG/T E61-2017
Rutting Depth:
Manual rutting measurement with cross-section ruler, rutting measurement with laser profilometer, 3D line laser rutting (full coverage).
Standards: JTG 3450-2019, JTG 5210-2018, JTG F80/1-2017, JTG/T E61-2017
Pavement Distress Condition:
Cracking (longitudinal, transverse, alligator, block), deformation (rutting, depression, shoving), surface defects (potholes, raveling, exposed aggregate, bleeding), patching classes (patch, sealed crack), automated image recognition distress survey (PCI).
Standards: JTG 5210-2018, JTG F80/1-2017, JTG/T 5211-2019, JTG/T 5212-2019
Skid Resistance Performance:
Pendulum tester friction coefficient (BPN), Side Force Coefficient (SFC), texture depth (sand patch method, laser method), Dynamic Friction Tester (DFT).
Standards: JTG 3450-2019, JTG 5210-2018, JTG F80/1-2017, JTG E60-2008, JTG/T E61-2017
Structural Layer Thickness:
Core drilling method thickness, GPR thickness, pit digging and ruler measurement thickness (for base course).
Standards: JTG F80/1-2017, JTG 3450-2019, JTG E60-2008, JTG/T E61-2017
Cement Concrete Strength:
Cubic compressive strength (28d standard curing), core sample compressive strength (core drilling method), flexural tensile strength (small beam method), splitting tensile strength (cylinder or cube), field rebound hammer method for strength estimation, field ultrasonic-rebound combined method for strength estimation.
Standards: GB/T 50081-2019, GB 50204-2015, JGJ/T 384-2016, JGJ/T 23-2011, JTG F30-2003, JTG F80/1-2017
Service Advantages
Technologically Leading: Equipped with over 800 sets of high-end equipment, including 3D ground-penetrating radar (GPR) and multi-functional road inspection vehicles, enabling intelligent and non-destructive testing.
Authoritative Qualifications: Holds Class A testing qualification for highway engineering, covering over 20 key indicators and all related parameters.
Full-Chain Service: Relying on the dual-wheel drive system of "Transportation + Construction", providing full-chain testing support from construction to acceptance.
Smart Empowerment: Innovating "BIM + Testing" technology to build digital laboratories, enhancing efficiency and accuracy.
