Floor Expansion Joint Leakage Analysis Diagram

Common causes of leakage in expansion joints analysis as follows:

1. Inadequate Waterproof Design Reasons: The waterproof design of the expansion joints is too simplistic, failing to meet the expansion requirements. Selection of Waterproof Sealant Material: Initially, the waterproof sealant was a standard type of sealant, with poor aging resistance and flexibility, leading to the aging and cracking of the waterproof layer. The exposed end of the waterproof layer at the junction is subjected to long-term high-temperature exposure, and the expansion and contraction due to temperature differences easily cause aging and detachment from the base, resulting in the loss of waterproof effectiveness. Therefore, most roof leaks are particularly prominent.
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 edges of the waterproofing layer, seeps into the waterproofing layer, and leaks into the lower space.
3. Rainwater seeps into the waterproofing layer through cracks or joints in the insulation layer, causing it to be filled with water for a long time. Water then infiltrates through gaps or aging and cracked seals at the overlaps of the waterproofing layer and at pipe roots or weak joints. Additionally, due to defects in the layered subcontracting process after the waterproofing layer is completed, the insulation layer may inevitably damage the waterproofing layer during construction, allowing water to seep in through cracks and damage, forming long-term 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 diagram

Expansion joint waterproof reinforcement solution features

Expansion joint waterproof reinforcement construction plan uses waterproof materials that match the structure layer defects of the expansion joint and the construction environment. For the vertical wall root angle of the expansion joint and cracks and voids in the floor base, apply a rigid reinforcement treatment with leak stopper. Form a curved corner for the rigid leak-proof layer, and apply a non-curing rubber waterproof layer to the floor 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 stress caused by changes in the vertical wall of the expansion joint and the base. This ensures that the creep-type non-curing rubber waterproof layer has sufficient tensile strength, effectively resisting the destruction of external stresses.