Marshall stability tester

Marshall stability tester is a professional instrument for measuring the thermal stability and plastic deformation resistance of asphalt mixture.

Marshall stability tester
Application overview:
The instrument is extremely simple to operate, the entire test is automatically controlled by the instrument, the detection data is reliable, the error is eliminated, the test results are automatically recorded and printed, the instrument has overload protection function, and can store 15 results. for selection

Technical Parameters
Pressure measurement range 0-30KN 50KN accuracy: 1% accuracy 10N
Flow measurement range 0-150.0 Accuracy 0.1mm
Loading rate 50mm ± 5mm / min Upper and lower indenter radius 50.8mm
Working voltage 220V / 50HZ

Working principle

A destructive test is carried out on a standard cylindrical specimen of asphalt mixture at a temperature of 60℃ and a specified speed to measure the maximum pressure and deformation it can withstand under hot conditions. A vertical load is applied to the specimen through a loading device, a force measuring device measures the pressure borne by the specimen, and a flow value measuring device measures the vertical deformation of the specimen under pressure, thereby obtaining the stability and flow value of the asphalt mixture, providing an accurate basis for the composition ratio design of the asphalt mixture and the quality inspection of asphalt pavement construction.

Structural composition

Loading device: It is composed of a hanger, a crossbeam, a column, a force measuring device, a steel ball, a loading head, a tray, etc. The loading head is composed of an upper head, a lower head, and a guide rod. After the upper head is inserted into the guide rod, it can slide up and down freely and can apply a vertical load to the specimen.
Force measuring device: A force ring or a load sensor with a dial indicator is used to measure the pressure borne by the specimen.
Flow value measuring device: It is composed of a guide rod, a catheter and a deformation measuring instrument. The catheter is sleeved on the connecting guide rod of the loading pressure head and can slide freely to measure the vertical deformation of the test piece.

Main features

Various automatic functions: It can automatically load, automatically stop, automatically display and collect data, accurately identify and maintain peak values, and print data and curves.
Reasonable circuit design: separation of strong and weak electricity, separation of digital and analog, electronic components use industrial products, wide operating temperature range, stable performance, good repeatability, and strong anti-interference ability.
Perfect safety protection: It has triple self-protection functions of hardware and software to ensure safe and reliable testing.
Convenient operation: Some instruments are equipped with manual rising and falling functions, which can put the tray in a suitable position and are easy to operate.
Intuitive display: The Chinese LCD screen can display stability and flow value, which is convenient for operators to read data.