Floor Expansion Joint Seepage Analysis Diagram

Analysis of common causes for leakage at 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: Initially, the waterproof sealant was a standard type of sealant, with poor 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, causing thermal expansion and contraction due to temperature differences, which easily leads to aging and separation from the base, losing its waterproof effect. Consequently, roof leaks are particularly prominent in most cases.
2. The waterproof design of the expansion joint is overly simplistic, failing to meet the expansion requirements. Rainwater, under the force of wind pressure, washes away the damaged edges of the waterproof layer, seeping into the waterproofing and leaking into the lower space.
3. Rainwater infiltrates the waterproofing layer through cracks or joints in the thermal insulation ground, filling it with water for an extended period. Water then seeps in through improperly sealed or aged and cracked edges at the overlaps of the waterproofing layer and at pipe roots or weak joints, as well as through defects in the layered分包 after the waterproofing layer is completed. During the installation of the thermal insulation layer, it is inevitable that the waterproofing layer gets damaged, allowing water to渗 into and accumulate internally for a long time through cracks and damage. This results in minor leaks during rainy days and major leaks after the sun comes out.

Expansion joint waterproof reinforcement structure drawing

Expansion joint waterproof reinforcement solution features

Expansion joint waterproof reinforcement construction plan uses waterproof materials matched to the structural layer defects and construction environment. For cracks and voids at the root angle of the expansion joint vertical wall and the floor slab base, use堵漏灵 (stop leak) for rigid reinforcement treatment. The rigid waterproofing layer is formed into an arc shape, and a non-curing rubber waterproofing layer is applied to the floor slab and the base of the vertical wall. The chemical reaction, combined with physical adsorption, forms a rigid-flexible waterproof bonding that is firmly attached, eliminating stresses generated by changes in the base layer of the expansion joint vertical wall. This allows the creep-resistant non-curing rubber waterproofing layer to have sufficient tensile strength, effectively resisting damage from external stresses.