Pavement, Subgrade, and Aggregate Testing Equipment
This instrument is designed and manufactured in accordance with JTJ 059‑95, the “Field Test Procedure for Highway Subgrade and Pavement,” and is suitable for determining the in‑situ CBR value of various subgrade materials on highway construction sites. Its operating principle involves using a heavy‑duty vehicle with a rear axle load of at least 60 kN, applying incremental loads via a jack, and calculating the in‑situ CBR value based on the penetration depth measured by the penetration rod and the applied load determined by the load cell.
LD-34 Permeable Pavement Brick Permeability Coefficient Testing Apparatus
The permeability coefficient testing apparatus for permeable pavement bricks is a device used to determine the permeability coefficient of such bricks. It features a simple structure, low cost, ease of operation, and reduced testing expenses. This equipment is employed in the field of building materials technology, particularly for measuring the permeability coefficient of permeable paving bricks, and it recirculates air‑free water to enhance measurement accuracy. The apparatus consists of a water storage cylinder, a specimen‑connection sealing assembly, an overflow trough, a graduated cylinder, and other components. An overflow pipe is installed on the side wall at a specific height between the overflow trough and the water storage cylinder, while the bottom of the storage cylinder is fitted with a detachable specimen‑connection sealing assembly, facilitating easy installation and removal of test specimens.
LHHD-1 Pavement Cross-Section Scale
The pavement cross‑section gauge is used to measure rutting in asphalt pavements, for assessing pavement condition and calculating maintenance workload.
LHMC-0967 Highway Subgrade and Pavement Continuous Lateral Friction Coefficient Tester
Overview: The LHMC-0967 Continuous Lateral Friction Coefficient Tester addresses the fact that pavement deterioration can result from rolling‑wear and braking‑induced abrasion, as well as from contamination by water, snow, mud, ice, or rubber debris. In addition to complying with national highway‑inspection standards, the LHMC-0967’s testing and data‑storage system meets the requirements of the U.S. Federal Aviation Administration (FAA), the International Civil Aviation Organization (ICAO), and the UK Civil Aviation Authority (CAA). Its robust construction and innovative design enable the LHMC-0967 to deliver reliable pavement friction measurements in virtually any environment, satisfying the demands of modern highway and airport‑runway friction‑coefficient testing.
LHPS-II Electric Sand Spreader
Pavement texture depth is an indicator that characterizes pavement roughness. Traditionally in China, the manual sand‑filling method has been used to measure this parameter; although straightforward, it suffers from significant human error and lacks standardized operating procedures, making it inadequate for the testing needs of domestic road authorities. This instrument is a new product jointly developed by our factory and the Highway Research Institute of the Ministry of Transport. Building on the Japanese electric roughness meter introduced by the Ministry, we addressed numerous shortcomings based on China’s specific conditions, producing the country’s first domestically manufactured prototype. In December 1992, the Ministry of Transport organized relevant agencies to conduct field tests and verifications, comparing this instrument under identical conditions with both the Japanese electric roughness meter and the manual sand‑filling method. The results demonstrated that our electric sand‑filling roughness meter is simple to operate, convenient to use, and eliminates human‑induced errors, making it an ideal device for assessing pavement macroscopic roughness and skid resistance.
RT-CM Asphalt Mixture Core Sampler
The RT-CM type asphalt‑mix core‑drilling machine (hereinafter referred to as the “drill”) is a specialized tool designed for extracting precision core samples from asphalt mixtures, both in the field and in the laboratory. It is easy to operate, lightweight and highly maneuverable, delivering accurate drilling and sampling dimensions with smooth, polished bore surfaces, while preventing unintended damage to the extracted material—making it an ideal piece of construction equipment. Powered by a series‑wound motor and equipped with synthetic diamond‑coated thin‑wall drill bits, this new‑generation product is primarily used in concrete works such as building projects, highways, airports, port terminals, and dams for core‑sampling operations. As a result, it eliminates the outdated practice of pre‑drilling holes in precast slabs or manually chiseling holes after construction, and it is also ideally suited for core extraction in research settings. Furthermore, this drill can be employed to drill and core other non‑metallic, brittle, and hard materials, including refractory materials, ceramics, glass, and rock.
SD-II Electric Aggregate Sand Equivalent Tester
Complies with the technical requirements of the “Test Procedures for Aggregates in Highway Engineering” JTG 3432-2024. The specimen cylinder is subjected to transverse linear oscillation via automated mechanical vibration, enabling determination of the sand equivalent value of fine aggregates and assessment of the relative content of clayey materials, thereby evaluating the cleanliness of fine aggregates. Performance features: dual‑tube operation allows simultaneous parallel automatic oscillation of two specimens, and a single button press automatically completes one oscillation cycle.
SH-1A Digital Display Constant-Temperature Oil Bath
It is used for precise temperature control, providing direct or auxiliary heating in scientific fields such as biology, physics, botany, chemical engineering, and environmental protection.
SK-261A Closed-Cup Flash Point Tester for Petroleum Products
The petroleum product flash point tester is designed and manufactured in accordance with the GB/T 261 and ASTM D93 test methods. It is used to determine, under specified conditions, the lowest temperature at which the vapor of a petroleum product, when mixed with air, will ignite upon contact with a flame; this temperature is referred to as the closed-cup flash point. Colorimetric comparison is employed to establish the corresponding color number. The color number indicated by this instrument is equivalent to that specified in GB/T 6540.
STT-930A Retroreflector Impact Resistance Tester for Raised Road Markers
The impact‑resistance tester for raised pavement markers is specifically designed and manufactured for use by manufacturers, quality‑control agencies, construction firms, and supervisory bodies to assess the impact resistance of raised pavement marker retroreflectors. It features a well‑thought‑out design, simple operation, broad applicability, high measurement accuracy, and excellent safety and reliability. The instrument complies with the requirements of GB/T 24725 “Raised Pavement Markers” for testing the impact resistance of retroreflectors on raised pavement markers.
STT-940 Steel Component Zinc Coating Adhesion Tester
This instrument is suitable for testing the adhesion of galvanized coatings on steel components. It consists of three parts: a hammer head, a hammer handle, and a base.
STT-950D Pavement Marking Thickness Gauge
The STT-950D pavement marking thickness gauge is specifically designed and manufactured for use by production facilities, quality‑control agencies, construction firms, and supervisory bodies to measure the thickness of road markings. Featuring a well‑thought‑out design, simple operation, broad applicability, and high measurement accuracy, this digital instrument is primarily used to determine the thickness of pavement markings after they have been put into service.
SYA-13A Road‑Use Wood Fiber Image Diameter Analyzer
The fiber image analyzer (projector) is the standard instrument for determining fiber fineness and content in the textile industry. It employs a microscope combined with specialized analysis software, equipped with a wide‑field eyepiece and dedicated objectives, delivering a large, clear field of view. It features a coaxial coarse‑and‑fine focus mechanism with adjustable coarse‑focus tension, and allows seamless switching between brightfield and polarized‑light observation. The system supports 100% transmittance photography, enabling comprehensive analysis and measurement of fibers. This instrument can be used to assess wood‑fiber content as well as to measure fiber length and diameter, making it a versatile tool for fiber quality inspection. With its high measurement accuracy, full functionality, rapid processing speed, user‑friendly operation, complete and precise output, and reliable performance, it is widely applicable in the wool‑spinning industry, fiber‑testing laboratories, commodity‑inspection agencies, and animal husbandry—for measuring the diameter of animal fibers such as wool and rabbit hair, and for identifying various natural and man-made blended fibers as well as different types of down.
SYL-II Fully Automatic Aggregate Weak Particle Tester
This method is suitable for determining the content of weak particles in coarse aggregates. The instrument employs a silent stepper motor as its core drive source and is designed with user‑friendly operation in mind. During testing, it simultaneously generates force‑deformation data and force‑time curves, providing precise data support. A pulse‑adjustment knob enables more accurate control of the applied load, facilitating deeper and more accurate force analysis. The device supports one‑button automatic testing: after setting the desired pressure value and constant‑pressure duration, pressing the automatic test button (or activating the multifunction knob) causes the upper platen to descend automatically, maintain constant pressure, and then rise again upon completion. Compared with the cumbersome steps of manual testing, this instrument offers a clear efficiency advantage.
WX-2000 Fine Aggregate Flowability Tester (Round)
The fine aggregate angularity tester is used to measure the flow time required for a specified volume of fine aggregate (manufactured sand, stone chips, or natural sand) to pass completely through a standard funnel. This flow time is defined as the angularity of the fine aggregate and is expressed in seconds. The instrument is suitable for evaluating the surface texture and roughness of fine aggregate particles and for predicting their influence on the internal friction angle and resistance to deformation under flow of asphalt mixtures.
WX-2000 Fine Aggregate Flow Time Tester (Gap Method)
The fine aggregate angularity tester is used to determine the flow time required for a specified volume of fine aggregate (manufactured sand, stone chips, or natural sand) to pass completely through a standard funnel. This flow time is referred to as the angularity of the fine aggregate and is expressed in seconds. The instrument is suitable for evaluating the surface texture and roughness of fine aggregate particles and for predicting their influence on the internal friction angle and resistance to deformation under flow of asphalt mixtures.
WX-2000 Fine Aggregate Flow Time Tester (Flow Time Method)
The fine aggregate angularity tester is used to determine the flow time required for a specified volume of fine aggregate (manufactured sand, stone chips, or natural sand) to pass completely through a standard funnel. This flow time is defined as the angularity of the fine aggregate and is expressed in seconds. The instrument is suitable for assessing the surface texture and roughness of fine aggregate particles and for predicting their influence on the internal friction angle and resistance to rutting of asphalt mixtures.
It is used to determine the surface texture depth of asphalt pavements and grooved‑free cement concrete pavements, thereby assessing the pavement’s skid resistance. The principle involves spreading a known volume of dry sand, with a specified particle size, over the pavement surface to form a circular area; the ratio of the sand’s volume to the average area it covers is defined as the pavement texture depth, expressed in millimeters.
Standard Fixture for Pendulum Friction Coefficient Tester (Dual‑Purpose)
When zeroing the pendulum friction coefficient tester, loosening and tightening the fixing handle allows the pendulum to rise and swing freely, thereby enabling the pointer to accurately indicate zero. This establishes a precise initial condition for subsequent measurements, ensuring the accuracy of the test data.
Tilting Friction Coefficient Tester Accessories – Rubber Sheet, Sliding Block, Sliding Length Gauge
The accessory is designed for use with pendulum friction coefficient testers; its specifications are precise and compatible with various models of pendulum testers available on the market.
Ballast Particle Surface Cleanliness Testing Apparatus
This instrument is used to determine the surface cleanliness of railway ballast, specifically the mass percentage of dust, soil, and other foreign matter adhering to the particle surfaces of railway ballast products. It consists of a 10‑L acrylic container and a P30 glass filter.
Ballast Flakiness and Elongation Index Tester
The product complies with TB/T 2328.15 “Test Methods for Railway Ballast – Part 15: Test for Needle‑Shaped Index and Flaky‑Shaped Index,” which is applicable to the determination of the needle‑shaped index and flaky‑shaped index of railway ballast.
Sand-filling cylinder, sand-filling test bucket
The sand-filling cylinder is suitable for in‑situ testing of the compaction degree of base and subbase layers, granular pavement surfaces, and subgrade structures, thereby evaluating the compaction quality of structural layers. It complies with the requirements specified in JTG 3450‑2019, “Field Test Procedures for Highway Subgrades and Pavements.”
The crushing resistance of crushed stone or gravel is determined to indirectly estimate its corresponding strength.
Stone crushing value calibration tank
Stone crushing value calibration tank
Manual sand spreading device: consists of a cylindrical barrel and a push plate.
Three-needle thickness gauge for synthetic surfacing of plastic running tracks
This thickness gauge is suitable for measuring the thickness of synthetic material surface layers. It is easy to use and provides accurate measurements.
Deflection meter mounting frame
Deflection meter frame body made of stainless steel
Fine Aggregate Sand Crushing Tester
The crushing index of fine aggregate is used to assess its resistance to crushing under progressively increasing loads, thereby evaluating its suitability for use in highway engineering.
It is suitable for determining the in-situ CBR values of various subgrade materials on highway construction sites. This instrument can also be used to directly measure the resilient modulus of subgrade soils, full‑depth pavement layers (0.8–1.0 m thick), and pavement structural layer materials on roadways.
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