Test device and method of road material tensile properties

The invention relates to a test device and method of road material tensile properties. The test device comprises a press, an upper loading plate, a lower loading plate, an upper die pressure head anda lower die pressure head, wherein the die pressure heads are cylindrical die pressure heads, a cylindrical test piece is placed between the upper die pressure head and the lower die pressure head, the press is provided with a base, the lower loading plate is fixedly installed on the base, and the press is further provided with a dial indicator used for measuring displacement of the die pressure heads, a gasoline pump used for setting a loading rate and a display panel used for displaying load data. According to the test method, the cylindrical test piece is perpendicularly placed between theupper die pressure head and the lower die pressure head, the die pressure heads and the test piece are kept coaxial, a load is applied through the press to make the test piece split, stretched and damaged along a radial surfac