Floor Expansion Joint Seepage Analysis Diagram

Common causes of leakage at expansion joints analysis as follows:

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 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, 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, resulting in failure to meet the expansion requirements. Rainwater, under the force of wind pressure, washes away at the damaged ends of the waterproof layer, seeps into the waterproofing and leaks into the lower space.
3. Rainwater infiltrates the waterproofing layer over time through cracks or expansion joints in the thermal insulation ground, seeping into the layer and pooling. It enters at the edges of the waterproofing layer's overlaps and at weak points around pipes or joints where seals are not tight or have aged and cracked. Additionally, due to defects in the layered subcontracting process after the waterproofing layer is completed, the thermal insulation layer is inevitably damaged during construction, allowing water to seep in through the cracks and damage, forming long-term water accumulation within the waterproofing layer. This leads to minor leaks during rainy days and major leaks after sunny weather.

Expansion joint waterproof reinforcement construction drawing

Expansion 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. The root corners of the expansion joint vertical walls, cracks, and voids in the floor slab base surface are treated with leak-sealing magic for rigid reinforcement. The rigid leak-sealing layer is formed into an arc shape, and a non-curing rubber waterproof layer is applied to the floor slab and the base surface of the vertical walls. The chemical reaction, supplemented by physical adsorption, forms a rigid-flexible waterproof bond that is firmly attached, eliminating stress generated by changes in the base layer of the expansion joint vertical walls. This ensures that the creep-type non-curing rubber waterproof layer has sufficient tensile strength to effectively resist the destructive forces of external stress.