Highway engineering materials are the physical foundation for constructing and maintaining highway subgrades, pavements, bridges, culverts, and their ancillary facilities. Their performance directly determines the load-bearing capacity, durability, comfort, safety, and service life of highways. The science of highway engineering materials is continuously evolving, and its progress directly promotes quality improvement and sustainable development of transportation infrastructure. With continued investment in new projects, national investment in highway engineering fixed assets is expected to remain at a high level over the next 3-5 years, with a total expected scale exceeding 7 trillion yuan.
We now possess advanced testing equipment and a professional technical team, holding the highest-level qualification issued by the Ministry of Transport, "Highway Engineering - Class A". We are able to provide clients with full-process, full-lifecycle, full-field one-stop testing technical services.
Testing Products
Cement
Mineral Admixtures (Supplementary Cementitious Materials)
Chemical Admixtures
Grouting Materials
Cement Concrete and Mortar
Rock
Aggregates
Geosynthetics
Waterproofing Materials
Steel and Connections/Joints
Water
Prestressing Steel, Anchors, Grips, and Couplers
Prestressed Corrugated Ducts
Prestressing Steel (Rebar/Strand)
Anchors, Grips, and Couplers
Bridge Bearings
Bridge Expansion Joints
Testing Items
Cement:
Density; Fineness (sieve residue, specific surface area); Water requirement for normal consistency; Setting time; Soundness; Mortar strength; Chloride ion content; Alkali content (flame photometry only); Mortar fluidity; Loss on Ignition (LOI); Sulfur trioxide (SO₃) content; Magnesium oxide (MgO) content; Insoluble residue content.
Mineral Admixtures:
Density; Fineness; Specific surface area; Water demand ratio; Fluidity ratio; Loss on Ignition (LOI); Moisture content; Sulfur trioxide (SO₃) content; Free calcium oxide (f-CaO); Chloride ion content; Calcium oxide (CaO) content; Magnesium oxide (MgO) content; Soundness; Activity index; Silicon dioxide (SiO₂) content; Alkali content.
Chemical Admixtures:
pH value; Chloride ion content (potentiometric titration only); Total alkali content (flame photometry only); Water-reducing rate; Bleeding ratio; Compressive strength ratio; Shrinkage ratio; Setting time difference; Air content; Time-dependent change (slump, air content); Relative durability; Solid content; Moisture content; Density; Fineness; Sodium sulfate content; Fluidity of cement paste; Water permeability pressure ratio; Penetration height ratio; Restricted expansion rate; Setting time; Compressive strength.
Grouting Materials:
Chloride ion content; Setting time; Fluidity; Flexural strength, Compressive strength; Bleeding rate; Free expansion rate; Pressure bleeding rate; Degree of fullness; Sulfur trioxide (SO₃) content; Specific surface area.
Cement Concrete and Mortar:
(1) Cement Concrete:
Consistency; Apparent density; Air content; Setting time; Compressive strength; Compressive elastic modulus; Flexural tensile strength; Impermeability; Mix design; Splitting tensile strength; Bleeding rate; Flexural tensile elastic modulus; Freeze-thaw grade and dynamic elastic modulus; Drying shrinkage; Slump flow and slump flow loss over time; Electric flux (chloride ion penetration resistance).
(2) Mortar:
Consistency; Density; Cubic compressive strength; Mix design; Water retention; Setting time; Layer segregation; Freeze-thaw resistance.
Rock:
Uniaxial compressive strength; Moisture content; Particle density; Block density; Water absorption; Freeze-thaw resistance.
Aggregates:
(1) Coarse Aggregate:
Particle size distribution (gradation); Density; Water absorption; Moisture content; Clay, silt and dust content; Clay lump content; Flat and elongated particle content; Soundness; Crushing value; Los Angeles abrasion loss; Polished stone value (PSV); Alkali reactivity; Sulfide and sulfate content; Organic matter content; Weak particle content; Crushed particle content.
(2) Fine Aggregate:
Particle size distribution (gradation); Density; Water absorption; Moisture content; Clay, silt and dust content; Clay lump content; Soundness; Crushing value; Sand equivalent; Methylene blue value (MBV); Water-soluble chloride ion content; Angularity; Alkali reactivity; Sulfide and sulfate content; Mica content; Lightweight material content; Shell content; Flat and elongated particle content.
(3) Mineral Filler (for asphalt mixtures):
Particle size distribution (gradation); Density; Moisture content; Hydrophilic coefficient; Plasticity index; Heating stability.
Geosynthetics:
Thickness; Mass per unit area; Geometric dimensions; Tensile strength; Elongation; CBR puncture resistance; Trapezoidal tear strength; Puncture resistance; Node/joint/weld strength; Apparent opening size (AOS); Vertical permeability coefficient; Effective opening size; Clogging potential; Resistance to hydrostatic pressure; Direct shear friction; Pull-out friction.
Waterproofing Materials:
(1) Waterproofing Sheets/Boards:
Tensile strength; Elongation at break; Tear strength; Low temperature bendability; Impermeability (watertightness); Heating shrinkage/expansion; Appearance quality; Dimensional (length, thickness, width).
(2) Waterstops:
Dimensional tolerances; Appearance quality; Hardness; Tensile strength; Elongation at break; Tear strength; Heat aging (hardness change (Shore A), tensile strength, elongation at break); Brittleness temperature.
(3) Water-swellable strips:
Tensile strength; Elongation at break; Volume expansion ratio; Repeated water immersion test; Low temperature bending; Appearance quality; Dimensional tolerances (diameter, width, height); Hardness; High temperature flowability; Low temperature test.
(4) Waterproofing Membranes:
Thickness; Soluble filler/bitumen content; Heat resistance; Tensile force; Elongation; Low temperature flexibility; Nail rod tear strength; Resistance to static load; Peel strength of seams; Heat aging test (tensile strength retention, elongation retention, low temperature flexibility/bendability retention, dimensional change rate, mass loss); Low temperature bendability; Impermeability; Appearance; Area; Mass per unit area; Thickness of under-surface bitumen coating; Chemical resistance (appearance, maximum tensile force retention, tensile strength retention, elongation at maximum force retention, change rate of elongation at break, low temperature bendability).
Steel and Connections/Joints:
Weight deviation; Dimensional deviation; Tensile strength; Yield strength; Percentage elongation after fracture; Total percentage elongation at maximum force; Bending performance; Reverse bending; Shear resistance of welded steel fabric; Residual deformation under uniaxial tension.
Prestressing Steel, Anchors, Grips, and Couplers:
Maximum force; Total percentage elongation at maximum force; Yield force; Percentage reduction of area; Elastic modulus; Static load anchorage performance (anchor efficiency coefficient, total elongation); Hardness; Stress relaxation performance; Bending; Reverse bending; Torsion; Center wire diameter ratio for 1x7 structure strand.
Prestressed Corrugated Ducts:
Appearance/dimensions; Ring stiffness; Local transverse load; Flexibility; Tensile properties; Longitudinal load; External load performance; Impact resistance; Ash content; Aging resistance; Leakage resistance (Watertightness).
Water:
pH value; Chloride ion content; Sulfate (SO₄²⁻) content; Alkali content; Insoluble matter content; Soluble matter content.
Asphalt and Asphalt Mixtures:
Marshall stability, flow value, aggregate gradation, asphalt content (oil-stone ratio), density, dynamic stability (rutting resistance), Schellenberg binder drainage, retained stability, freeze-thaw splitting strength ratio, mix design, voids filled with asphalt (VFA), theoretical maximum specific gravity (Rice density), water permeability coefficient, Cantabro abrasion loss, air voids (Vv), voids in mineral aggregate (VMA), sand adhesion (adherence), mixing test, compatibility grade, viscosity (consistency), abrasion value (PSV), emulsion breaking time (setting time), cohesion, standard viscosity, breaking speed, mixing test with aggregate, storage stability, mixing test with cement.
Inorganic Binder Stabilized Materials:
Moisture content, liquid limit, plastic limit, compaction test, maximum dry density for coarse and very coarse-grained soil, California Bearing Ratio (CBR) test, unconfined compressive strength, cement or lime content, plasticity index, coefficient of uniformity, particle content below 0.6mm, particle size analysis (gradation), organic matter content, soluble salt content, specific gravity, coefficient of curvature.
Prestressing Steel
Anchors, Grips and Couplers
Bridge Bearings
Bridge Expansion Joints
Maximum Force
Total Percentage Elongation at Maximum Force
Yield Force
Percentage Reduction of Area
Elastic Modulus
Static Load Anchorage Performance (Anchor Efficiency Coefficient, Total Elongation)
Hardness
Stress Relaxation Performance
Bending
Reverse Bending
Torsion
Center Wire Diameter Ratio for 1×7 Structure Strand
Overall Dimensions
Appearance
Internal Quality
Ultimate Compressive Strength
Compressive Elastic Modulus
Shear Elastic Modulus (Double Shear Only)
Shear Aging Resistance (Double Shear Only)
Shear Bonding Performance (Double Shear Only)
Coefficient of Friction (Double Shear Only)
Vertical Bearing Capacity (Vertical Compression Deformation, Radial Deformation of Pot Ring) (Double Shear Only)
Vertical Stiffness
Compression Deformation
Appearance Quality
Dimensional Deviations
Weld Quality (Ultrasonic Method)
Surface Coating Quality (Coating Adhesion, Coating Thickness)
Assembly Tolerances
Rubber Seal Clamping Performance
Waterproofing Performance
Testing Standards
Cement:
GB/T 208-2014, JTG 3420-2020, GB/T 8074-2008, GB/T 1345-2005, GB/T 1346-2011, GB/T 17671-2021, JC/T 738-2004, GB/T 2419-2005, GB/T 176-2017
Mineral Admixtures:
GB/T 1345-2005, GB/T 1596-2017, JTG E51-2009, GB/T 51003-2014, GB/T 8074-2008, GB/T 208-2014, GB/T 2419-2005, GB/T 17671-2021, GB/T 18736-2017, GB/T 18046-2017, GB/T 176-2017, GB/T 1346-2011, GB/T 750-1992, GB/T 20491-2017, GB/T 27690-2011, YB/T 140-2009, JC/T 1088-2021, GB/T 27973-2011, JC/T 420-2006, GB/T 27975-2011, GB/T 27974-2011
Chemical Admixtures:
GB 8076-2008, JT/T 523-2022, GB/T 50080-2016, JTG 3420-2020, JC/T 477-2005, GB/T 17671-2021, JC/T 475-2004, JT/T 769-2009, GB/T 8077-2012, GB/T 8074-2008, GB/T 1345-2005, JC/T 475-2004, GB/T 23439-2017, GB/T 2419-2005, JC/T 474-2008
Grouting Materials:
GB/T 176-2017, GB/T 1346-2011, JTG 3420-2020, GB/T 17671-2021, TB/T 3192-2008, GB/T 8074-2008
Cement Concrete and Mortar:
JTG 3420-2020, GB/T 50082-2009, GB/T 50080-2016, GB/T 50081-2019, JGJ 55-2011, JTG/T 3650-2020, GB 50086-2015, DBJ50/T-287-2018, JGJ/T 372-2016, JTG/T F30-2014, JGJ/T 70-2009, JGJ/T 98-2010, DBJ/T 50-093-2009
Rock:
JTG 3431-2024, GB/T 50266-2013
Aggregates:
GB/T 14684-2022, JTG 3432-2024, JGJ 52-2006, GB/T 14685-2022
Geosynthetics:
JTG E50-2006, GB/T 13761.1-2022, GB/T 19470-2004, GB/T 13760-2009, JT/T 1432.2-2022, GB/T 17643-2011, GB/T 6672-2001, GB/T 17598-1998, GB/T 13762-2009, GB/T 4666-2009, GB/T 6673-2001, GB/T 17689-2008, JT/T 1432.1-2022, GB/T 7689.3-2013, GB/T 15788-2017, GB/T 16989-2013, GB/T 21825-2008, GB/T 14800-2010, GB/T 13763-2010, GB/T 19978-2005, GB/T 15789-2016, SL 235-2012, GB/T 19979.2-2006, GB/T 14799-2005, GB/T 19979.1-2005, GB/T 17635.1-1998
Waterproofing Materials:
GB/T 18173.1-2012, GB/T 528-2009, GB/T 2941-2006, GB/T 529-2008, GB/T 18173.2-2014, JT/T 1124.1-2017, GB/T 531.1-2008, GB/T 3512-2014, GB/T 18173.3-2014, GB/T 328.4-2007, GB/T 328.5-2007, GB/T 328.26-2007, GB/T 328.11-2007, GB/T 328.8-2007, GB/T 328.9-2007, GB/T 328.14-2007, GB/T 328.18-2007, GB/T 328.19-2007, GB/T 328.25-2007, GB/T 328.20-2007, GB/T 328.21-2007, GB 18242-2008, GB 18243-2008, GB 12952-2011, GB/T 18244-2022, GB 12953-2003, GB/T 23457-2017, GB/T 35467-2017, GB 23441-2009, GB/T 328.15-2007, GB/T 328.10-2007, GB/T 328.2-2007, GB/T 328.3-2007, GB/T 328.1-2007, GB/T 328.6-2007, GB/T 328.7-2007, GB/T 328.15-2007
Steel and Connections/Joints:
GB/T 246-2017, GB/T 228.1-2021, GB/T 28900-2022, GB/T 1499.1-2017, GB/T 1499.2-2018, GB/T 13788-2017, JGJ/T 27-2014, GB/T 2651-2008, JGJ 107-2016, GB/T 2653-2008, GB/T 33365-2016, GB/T 1499.3-2022, YB/T 4503-2015
Prestressing Steel, Anchors, Grips, and Couplers:
GB/T 5223-2014, GB/T 21839-2019, GB/T 228.1-2021, GB/T 20065-2016, JT/T 329-2010, GB/T 14370-2015, JTG/T 3650-2020, GB/T 230.1-2018, GB/T 231.4-2009, JGJ 85-2010, TB/T 3193-2016, JT/T 329-2010, JGJ 85-2010, GB/T 5224-2014, GB/T 239.1-2023, GB/T 5223.3-2017, GB/T 232-2010, GB/T 238-2013, GB/T 5223-2014, GB/T 21839-2019, GB/T 228.1-2021, GB/T 20065-2016, JT/T 329-2010, GB/T 14370-2015
Prestressed Corrugated Ducts:
GB/T 2918-2018, GB/T 18477.1-2007, GB/T 8806-2008, JT/T 529-2016, CJ/T 225-2011, GB/T 19472.1-2019, GB/T 19472.2-2017, JG/T 225-2020, GB/T 5836.1-2018, YD/T 841.1-2016, QB/T 2479-2005, GB/T 21238-2016, GB/T 2918-2018, GB/T 14152-2001, GB/T 9345.1-2008, GB/T 5352-2005, YD/T 841.3-2016, GB/T 9647-2015, GB/T 8804.3-2003, GB/T 8804.1-2003, GB/T 8804.2-2003, GB/T 2918-2018
Water (Mixing):
GB 6920-1986, GB 11896-1989, GB 11899-1989, JTG/T 3650-2020, GB/T 176-2017, JTG/T 3650-2020, GB 11901-1989, GB/T 5750.4-2006
Asphalt and Asphalt Mixtures:
JTG E20-2011, GB/T 4508-2010, GB/T 4507-2014, JTG 3410-2025
Inorganic Binder Stabilized Materials:
JTG 3430-2020, JTG 3441-2024, JTG E51-2009, JTG/T F20-2015
Prestressing Steel:
GB/T 5223, GB/T 5224, GB/T 21839, GB/T 228.1, GB/T 20065, JT/T 329, GB/T 14370
Anchors, Grips, and Couplers:
JT/T 329, JTG/T 3650, GB/T 230.1, GB/T 231.4, GB/T 231.1, JGJ 85
Bridge Bearings (Laminated Rubber Bearings):
JT/T 4, GB/T 20688.4, JT/T 874, HG/T 2198, GB/T 2941, GB/T 528
Bridge Bearings (Pot Bearings):
JT/T 391, JT/T 851, JT/T 872, GB/T 20688.4
Bridge Bearings (Spherical Bearings):
GB/T 17955
Bridge Bearings (Seismic Isolation Rubber Bearings):
JT/T 1062, GB/T 20688.1, GB/T 20688.2, GB/T 20688.3
Bridge Expansion Joints:
JT/T 327, GB/T 11345, GB/T 29712, GB/T 29711, JB/T 9214, GB/T 5616, JB/T 10061, GB/T 23905, JT/T 722, GB/T 13452.2, GB/T 9286, GB/T 5210
Service Advantages
Holds the highest-level qualification issued by the Ministry of Transport, "Highway Engineering Class A".
Engaged in engineering material testing for over 20 years, possessing extensive experience and a stable technical team.
Based in Chongqing, serving the whole country. Major project experience includes highway testing projects such as Gansu Pengda Expressway, Yunnan Xiangli Expressway, Chongqing Nanfu Expressway, Nandao Expressway, Sichuan Suizi Expressway, etc., with advantages in site laboratory management and testing technology.
CTC Chongqing Testing Co., Ltd., established in 2003, is a comprehensive quality testing institution serving the entire construction process. As a central government-owned enterprise, it is a holding subsidiary of CTC, the first A-share listed central enterprise on the main board integrating inspection and certification. It provides strong technical support and an advanced management model, offering high-quality technical services to clients.
Equipped with a 20,000 kN computer-controlled electro-hydraulic servo compression-shear testing machine.
Testing range for ultimate compressive strength of rubber bearings: circular bearings from specified minimum diameter up to 600mm; rectangular bearings from specified minimum side length up to 450mm × 600mm or 500mm × 550mm.
Testing range for compressive elastic modulus, shear elastic modulus, compression aging, shear bonding performance, and friction coefficient of rubber bearings: circular bearings from minimum 350mm diameter up to specified maximum diameter; rectangular bearings from minimum 300×400mm side length up to specified maximum side length.
Vertical bearing capacity (vertical compression deformation, radial deformation of the pot ring) testing range for pot bearings and spherical bearings is from design vertical bearing capacity Class 2.0 MN to Class 12.5 MN.
