Floor Expansion Joint Leakage Analysis Diagram

Analysis of common reasons for leakage in expansion joints:

1. Inadequate Waterproof Design: The waterproof design of the expansion joints is overly simplistic, failing to meet the expansion requirements. Selection of Waterproof Sealant Material: Originally, the waterproof sealant material was a standard type of sealant, with low resistance to aging and expansion, leading to the aging and cracking of the waterproof layer. The exposed ends of the waterproof layer are subjected to long-term high-temperature exposure, making them prone to aging and peeling off from the base, thereby losing their waterproofing effectiveness. Consequently, roof leaks are particularly prominent in most cases.
2. The waterproof design of the expansion joint is too simplistic, failing to meet the expansion requirements. Rainwater, under the force of wind pressure, washes over the damaged ends of the waterproof layer, seeps into the waterproofing and leaks into the lower space.
3. Rainwater infiltrates the waterproofing layer through cracks or gaps in the insulation layer's ground, or at joints, causing the layer to be continually soaked. Water enters the waterproofing layer at the laps and at the pipe roots or weak joints where seals are not tight or have aged and cracked. Additionally, due to defects in the layer-by-layer subcontracting process after the waterproofing layer is completed, the insulation layer's installation may inevitably damage the waterproofing layer, allowing water to seep in through cracks and breaches, forming long-term water accumulation within the waterproofing layer. This results in minor leaks during rainy days and major leaks when it's sunny.

Expansion joint waterproof reinforcement construction drawing

Expansion joint waterproof reinforcement solution features

Expansion joint waterproof reinforcement construction plan uses waterproof materials that match the structural layer defects of the expansion joint and the construction environment. For cracks and voids at the root angle of the expansion joint vertical wall and the floor base surface, use Leak Sealant for rigid reinforcement treatment. The rigid leak-proof layer is formed into an arc, and a non-settling rubber waterproof layer is applied to the floor and the base surface of the vertical wall. The chemical reaction, supplemented by physical adsorption, forms a rigid-flexible waterproof bond that is firmly attached, eliminating stress generated by the change in the base layer of the expansion joint vertical wall. This allows the蠕变型non-settling rubber waterproof layer to have sufficient tensile strength to effectively resist the destructive forces from the outside.