Waterproof method of roof deformation joint

Abstract

The invention discloses a waterproof method of a roof deformation joint. The method comprises the following steps that (1) the top surface of a first concrete flashing structure and the top surface ofa second concrete flashing structure are thoroughly cleaned; (2) a first epoxy mortar layer and a second epoxy mortar layer respectively coat the top surface of the first concrete flashing structureand the top surface of the second concrete flashing structure; (3) a PVC waterproof roll layer is adopted to seal an opening in the top end of the deformation joint, and the two sides of the PVC waterproof roll layer cover the first epoxy mortar layer and the second epoxy mortar layer correspondingly; (4) a first polyurethane waterproof coating layer and a second polyurethane waterproof coating layer respectively cover the two sides of the PVC waterproof roll layer; and (5) a first self-adhesive waterproof roll covers the first polyurethane waterproof coating layer, and a second self-adhesivewaterproof roll covers the second polyurethane waterproof coating layer. According to the method, the problem that bonding is not firm if a flame-retardant PVC waterproof roll is directly bonded to concrete is solved, and the waterproof effect is long-term and reliable.

Description

technical field [0001] The invention relates to the field of roof waterproofing engineering, in particular to a waterproofing method for roof deformation joints. Background technique [0002] In order to adapt to the thermal expansion and contraction of the building due to temperature changes, to meet the earthquake resistance and the settlement of the building foundation, a deformation joint will be set on the building roof during the construction process. The existence of the deformation joint can prevent the building from being damaged due to temperature deformation or natural settlement. The resulting building structure is broken. [0003] However, deformation joints also have problems in terms of water leakage, because there are gaps, so the position of deformation joints is often prone to leakage. In order to avoid this situation, it is necessary to lay waterproof materials at the deformation joints for waterproofing of the deformation joints. [0004] The traditiona...

AI Technical Summary

Problems solved by technology

However, the asphalt-based polyester tire waterproofing membrane adopts self-adhesive or hot-melt lap joints, and the lap strength is low; and the asphalt-based polyester tire waterproofing membrane itself cannot be exposed, has poor aging resistance, and has a short service life.

The bigger problem is that the roof deformation joint is a channel connecting the inside and outside of the building. Once a fire accident occurs on the roof, the fire source will easily spread to the room through the roof deformation joint, and the asphalt-based polyester waterproof membrane is combustible and cannot Fire blocking effect

[0005] In terms of durability and fire resistance, the advantages of using flame-retardant PVC waterproofing membranes for roof deformation joint waterproofing are obvious, but in the actual construction process, it will be found that due to the weak bond between flame-retardant PVC waterproofing membranes and concrete, After a period of construction, the connection between the flame-retardant PVC waterproof membrane and the reverse sills on both sides of the deformation joint is easy to crack, or even a large piece falls off, which causes the waterproof membrane to lose its function and the deformation joint leaks

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