For the material of the rock plate, China's flat plate standard stipulates that should use dense gabbro, granite or other rockets with fine grain, dense structure. Its mineral composition and physical properties should meet the following requirements:
Elastic mold> 6000kgf per square centimeter
Shore hardness> HS70
Water absorption <0.15% (below 0 can be relaxed)
In addition, the use of units on the rock test plate and cast iron test plate advantages and disadvantages also need a comprehensive understanding, in order to according to the specific circumstances of the unit to make the right choice.