该产品参照美国标准ASTM C1698研制，主要部件包括Invar材质支架、电涡流位移传感器和温湿度传感器、波纹管，可将试样的体积变形转化为线性变形，能够避免试样在测试过程中出现水分散失，主要用于测试水泥净浆、砂浆由成型开始收缩或膨胀的自由变形。 

骨料最大粒径：4.75mm

The product is developed according to ASTM C1698 and is superior to the standard requirement. The main components include three invar dilatometer benches, six eddy current sensors, one temperature and humidity sensor and some corrugated plastic tubes. The volume deformation of the sample can be transformed into linear deformation, which can avoid water loss in the test process. It is mainly used to automatically measure the autogenous strain of cement paste and mortar.
Maximum aggregate size：4.75mm