concrete;  Gate piers;  Mechanical properties

Combined with the actual project of Yangjialing spillway gate pier, the relevant mechanical properties of gate pier concrete based on temperature control index were experimentally studied. The test results show that the addition of an appropriate amount of polypropylene fiber (0.9 kg/m3) can significantly improve the crack resistance of the gate pier concrete. For hydraulic projects lacking test data, the compressive elastic modulus of concrete of other ages can be calculated according to the compressive elastic modulus of 28 d age concrete, and the compressive elastic modulus of concrete can also be calculated according to the cubic compressive strength of concrete.