Floor Expansion Joint Leak 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 expansion requirements. Selection of Waterproof Sealant Material: Initially, the waterproof sealant was a standard type of sealant, with poor resistance to aging and flexibility, leading to aging and cracking of the waterproof layer. The exposed ends of the waterproof layer are subjected to long-term high temperatures and direct sunlight, making them prone to aging and peeling away from the base, thus 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 away the damaged ends of the waterproofing layer, seeping into the waterproofing and leaking into the lower space.
3. Rainwater seeps into the waterproofing layer through cracks or joints in the thermal insulation ground, causing it to be submerged for a long time. Water then infiltrates through poorly sealed or aged and cracked edges at the overlaps of the waterproofing layer and at the pipe roots or weak joints. Additionally, due to defects in the layered subcontracting process after the completion of the waterproofing layer, the thermal insulation layer may inadvertently damage the waterproofing during installation, allowing water to seep in through cracks and breaches, forming long-term internal water accumulation within the waterproofing layer. This leads to minor leaks during rainy days and significant leaks when it's sunny.

Expansion joint waterproof reinforcement construction drawing

Expandable Joint Waterproof Reinforcement Solution Features

Expansion joint waterproof reinforcement construction plan uses waterproof materials matched to 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 base surface of the floor slab, use leak-sealing magic for rigid reinforcement treatment. The rigid leak-sealing layer is shaped into an arc, coated with a non-curing rubber waterproof layer, and the base surface of the floor slab and the vertical wall. The chemical reaction is complemented by the physical adsorption action, forming a firm steel-rubber waterproof bonding, eliminating stress caused by changes in the base layer of the expansion joint vertical wall, providing enough tensile strength for the non-curing rubber waterproof layer to effectively resist the destruction of external stresses.