Thermal insulation concrete for dam body in severe cold area

The invention discloses thermal insulation concrete for a dam body in a severe cold area. According to the volume percentage, the concrete is mixed with 10%-15% of hard plastic hollow spheres; the diameter of the hard plastic hollow spheres is 0.5-1.0 cm, the wall thickness is greater than 2.0 mm, and the outer wall of the hard plastic hollow spheres has a number of fibers with the length of 6-9 mm and the diameter of 30-40 [mu]m. The fibers and the hard plastic hollow spheres are integrated into a whole, and the fibers are formed by drawing the hard plastic hollow spheres. Each hard plastic hollow sphere has 8-10 fibers evenly distributed. The hard plastic hollow spheres and the fibers are made of polypropylene materials. The disadvantages that traditional heat preservation and moisture preservation materials have low strength, easy aging and low durability and impermeability, are easy to fall off when an ice pulling force is large, a dam body is caused to generate cracks finally andthe safety of the dam bod