The invention relates to a building waterproof material, in particular to a waterproof roof
adhesive, which aims to solve the problems in prior roof waterproof material of poor weatherability, easy bubbling and peeling, and poor permeability and air permeability, comprising
asphalt,
coal tar, waste
polystyrene foam,
lime and
sawdust. Firstly, the waste
polystyrene foam is ground to particles; secondly, the
coal tar is added into a vessel and heated to 650 to 700 degrees; and the
asphalt is added into the vessel, and then the former mixture is agitated homogeneously and keep on
warming up to 750 degrees, after the
asphalt is dissolved, the mixture is cooled to 400 to 500 degrees; at last, waste
polystyrene foam,
lime and
sawdust are added into mixture successively, the mixture is agitated homogeneously and cooled to a paste shape, and then the finished product is obtained. The building waterproof material has the advantages that: the building waterproof material integrates the advantages of waterproof, heat preservation and heat insulation and has admirable waterproof and heat preservation effect, good weatherability, no fluid and cracks, high
adhesive strength; meanwhile, the material meet the national specified standard; more importantly, the aim of waste reuse,
pollution treatment, environment protection and cost saving are realized by using the waste polystyrene foam.