Hydraulic structure disjoint filling silicone adhesive and preparation method thereof

Abstract

The invention discloses hydraulic structure disjoint filling silicone adhesive, which is prepared from a component A and a component B according to a weight proportion, wherein the component A comprises 100 portions of alpha, omega-dihydroxydimethylpolysiloxane and 15 to 45 portions of calcium carbonate filler; and the component B comprises 3 to 10 portions of calcium carbonate filler, 6 to 15 portions of methyl vinyl disilane, and 3 to 10 portions of linear amino polysiloxane cross linker. After stirring and mixing according to the weight proportion, the components are separately sealed and stored; and during use, the component A and the component B are mixed according to the weight proportion and vulcanized at room temperature to form the hydraulic structure disjoint filling silicone adhesive. The hydraulic structure disjoint filling silicone adhesive has the characteristics of room temperature vulcanization, double components, self leveling, adjustable curing speed, low modulus, high elasticity, high durability, free from pollution, free from erosion and the like, belongs to an environment-friendly material, and is mainly used for pouring, filling, sealing and repairing hydraulic structure disjoints of water turbine volutes, water delivery steel pipes and the like.

Description

technical field

[0001] The invention relates to the field of water conservancy engineering materials, in particular to a two-component room-temperature vulcanized sealing silicone glue for void filling, repairing and perfusion of hydraulic structures and a preparation method thereof. Background technique

[0002] Hydraulic structures (such as turbine volutes, water delivery steel pipes, etc.) appear hollow between the steel plate and the concrete after a period of operation. For example, the structural form of the turbine volute of the Xin'anjiang Hydropower Station is an isolated cushion volute, and an asphalt elastic cushion is set between the volute and the surrounding concrete. After more than 40 years of operation, the asphalt cushion has seriously aged, and it has been found that there is serious voiding and water accumulation in the asphalt cushion. This phenomenon has many hidden dangers: (1) The surface of the volute loses its asphalt cover, and it is easy to corro...