Floor Expansion Joint Leakage Analysis Diagram

Common causes of leakage at expansion joints analysis as follows

1. Inadequate Waterproof Design: The simple design of the expansion joint waterproofing fails to meet the expansion requirements. Selection of Waterproof Sealant Materials: Originally, the waterproof sealant was a standard type of sealant, with low aging resistance and flexibility, leading to the 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 off 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 simple, 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 seeps into the waterproofing layer through cracks or separation gaps in the insulation layer's ground, causing it to be constantly filled with water. Water then infiltrates through poorly sealed or aged and cracked joints at the overlaps of the waterproofing layer and around pipes or nodes, as well as through defects in the layered subcontracting after the waterproofing layer is completed. During the insulation layer construction process, damage to the waterproofing layer is inevitable, allowing water to seep in through cracks and破损, forming long-term water accumulation within the waterproofing layer. This leads to minor leaks during rainy days and major leaks when it's sunny.

Expansion joint waterproof reinforcement structure 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 with the construction environment. The vertical wall root angle of the expansion joint, cracks, and hollows on the floor slab base surface are treated with堵漏灵for rigid reinforcement. The rigid waterproofing layer is shaped into an arc, and a non-curing rubber waterproof layer is applied, as well as on the floor slab and vertical wall base surfaces. The chemical reaction, aided by physical adsorption, forms a rigid-flexible waterproof bonding that is firmly attached, eliminating stress generated by the expansion joint vertical wall and sub-base changes. This ensures the蠕变型non-curing rubber waterproof layer has sufficient tensile strength to effectively resist the destruction of external stresses.