混合料收缩系数试验仪是依据《公路工程沥青及沥青混合料试验规程JTJ052-2000》中T0720-1993，采用现代传感器技术、自动控制技术、制冷技术开发的，主要用于测试沥青混合料试件在规定的时间和温度下的线收缩情况，
The mixture shrinkage coefficient tester was developed in accordance with T0720-1993 in the Highway Engineering Asphalt and Asphalt Mixture Test Procedure JTJ052-2000, using modern sensor technology, automatic control technology, and refrigeration technology. The linear shrinkage at the specified time and temperature,
混合料收缩系数试验仪主要特点：
本款仪器结构紧凑、式样美观，可利用微机进行整个过程的全自动测试。
Main characteristics of mixture shrinkage coefficient tester:
This instrument is compact in structure and beautiful in appearance. It can use a microcomputer to perform a fully automatic test of the entire process.
混合料收缩系数试验仪适用范围
本方法适用于测定沥青混合料的线收缩系数。 同时也用于从轮碾成型的板块状试件上切制的棱柱体试件，试件尺寸为长200mm±2.0mm，宽20mm±1.0mm,高20mm±1.0mm，温度区间及降温速率根据当地气候条件决定，通常采用的温度区间为＋10℃~-20℃，降温速率为5℃/h。
Application scope of mixture shrinkage coefficient tester
This method is suitable for determining the linear shrinkage coefficient of asphalt mixtures. At the same time, it is also used for the prism test piece cut from the plate-shaped test piece formed by wheel milling. The size of the test piece is 200mm ± 2.0mm long, 20mm ± 1.0mm wide, and 20mm ± 1.0mm high. The local climatic conditions determine that the temperature range usually used is + 10 ℃ ~ -20 ℃, and the cooling rate is 5 ℃ / h.
混合料收缩系数试验仪技术指标：
★容栅式数字千分位移传感器：行程0mm～10mm，分辨率0.001mm
★控温分辨率为0.1℃，控温范围-30℃～室温；温度下降速度为5℃/h ±1℃/h
★控制仪表上有20×4字符式液晶显示器，并有RS232C串口
★电源：220V×50Hz
★外形尺寸:700×300×1000mm。
★环境温度：≤35℃。
★相对湿度：≤85%。
★整机功耗： 2KW。
★仪器净重： 100kg
★电源电压：220v
Technical index of mixture shrinkage coefficient tester:
★ Grating type digital micro-displacement sensor: Stroke 0mm ～ 10mm, resolution 0.001mm
★ Temperature control resolution is 0.1 ℃, temperature control range is -30 ℃ ～ room temperature; temperature drop rate is 5 ℃ / h ± 1 ℃ / h
★ 20 × 4 character LCD display on the control instrument, and RS232C serial port
★ Power supply: 220V × 50Hz
★ Dimensions: 700 × 300 × 1000mm.
★ Ambient temperature: ≤35 ℃.
★ Relative humidity: ≤85%.
★ Whole machine power consumption: 2KW.
★ Net weight of the instrument: 100kg
★ Power supply voltage: 220v
混合料收缩系数试验仪仪器材料与配置:
★收缩仪：殷钢制，一端为球形侧头，另一端装置千分表或位移计，也可采用能快速准确测定变形的其他仪器。
★高低温循环恒温水槽：装有自动温度控制器，控温准确度为0.1℃，降温速率控制准确度为1℃/h。内部尺寸不小于长30cm、宽20cm及深15cm。
★金属测头：长约15mm，直径约5mm，接在试件一端的端部为半球形，接在试件另一端的端部为平面。
★冷媒：1:1甲醇水溶液或防冻液。
★温度计：分度为0.1℃。
★卡尺：量程250mm。
★其他：天平、铁盘、玻璃板、502粘结剂等。
Material and Configuration of Mixture Shrinkage Coefficient Tester
★ Shrink meter: made of Yin steel, one end is spherical side head, the other end is equipped with dial indicator or displacement meter, and other instruments can be used to quickly and accurately measure deformation.
★ High and low temperature circulating constant temperature water tank: equipped with automatic temperature controller, temperature control accuracy is 0.1 ℃, temperature control accuracy is 1 ℃ / h. The internal dimensions are not less than 30cm in length, 20cm in width and 15cm in depth.
★ Metal probe: about 15mm in length and about 5mm in diameter. The end connected to one end of the test piece is hemispherical, and the end connected to the other end of the test piece is flat.
★ Refrigerant: 1: 1 methanol solution or antifreeze.
★ Thermometer: The division is 0.1 ℃.
★ Caliper: 250mm range.
★ Others: balance, iron plate, glass plate, 502 adhesive, etc.
