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The Marshall stability test instrument is based on the People's Republic of China Ministry of Transportation "JTG E20-2001 highway engineering and asphalt testing procedures" in the T0709 asphalt mixture Marshall stability test standards developed.It applies to Marshall stability test and immer...

Rock frost resistance is used to assess the ability of rock to resist damage after a specified number of freeze-thaw cycles in a saturated state. Rock frost resistance requirements vary depending on the climate of the project environment. The rock freeze-thaw cycle test is a fundamental low-te...

Marking retroreflectometer is a portable on-site measuring instrument, used for measuring the retroreflection characteristic of road marking. R6116-type instrument is to simulate the brightness of road marking that can be seen by the driver under the illumination of motor vehicles at night, and...

The Standard Penetration Test (SPT) is a type of dynamic penetration test used to determine the bearing capacity of sand or clay foundations in situ. This method has been included in China's National Code for Design of Foundations for Industrial and Civil Buildings.

This Asphalt Breaking Point Tester consists of a "low-temperature circulating constant temperature bath" (hereinafter referred to as the "cold bath") and a brittle point tester. The low-temperature bath provides low-temperature circulating fluid for cooling the semiconductor cooler within the b...

Asphalt is an organic cementitious material that is waterproof, moisture-proof, and corrosion-resistant. Asphalt can be primarily categorized into three types: coal tar pitch, petroleum asphalt, and natural asphalt. Coal tar pitch is a byproduct of coking. Petroleum asphalt is the residue from ...

During municipal road construction, problems at any stage can seriously compromise project quality and even result in significant losses. Therefore, strict quality control is crucial. Testing and inspecting highway and bridge structures is both an important means of controlling project quality ...

In road construction, the California Bearing Ratio (CBR) test is an important method for evaluating the bearing capacity of roadbed soil and pavement materials. As a key component of road construction quality control, the accuracy of the CBR test directly impacts project design and service life.

The drop-weight deflectometer is suitable for measuring deflection and assessing load-bearing capacity on high-grade highways and airports. Under dynamic loads, the measured results can be used to assess road load-bearing capacity and estimate the road's remaining service life. The built-in dro...

A Proctor compaction test is a method of using a hammer to compact soil samples to understand their compaction characteristics. This method involves using different compaction efforts (hammer weight x drop distance x number of hammer blows) to hammer soil samples with varying moisture contents ...

The intensity of retroreflection is generally expressed as the retroreflection coefficient. Its physical meaning is: the luminance per unit area under unit illumination conditions, measured in cd/(lx∙m²).

The Los Angeles abrasion test uses coarse aggregate of a specified size and quantity. A specified number and mass of steel balls are placed in the abrasion machine. After a certain number of rotations, the specimen wears due to the combined effects of friction, impact, and shear between the speci...