Floor Expansion Joint Leakage Analysis Diagram

Analysis of common reasons for leakage at 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: Originally, the waterproof sealant material was a standard type of sealant, with poor resistance to aging and flexibility, leading to aging and cracking of the waterproof layer. The exposed end of the waterproof layer is subjected to long-term high-temperature exposure, making it prone to aging and peeling off from the base surface due to thermal expansion and contraction from temperature differences, thereby losing its waterproofing effect. As a result, 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 at the damaged ends of the waterproof layer, seeping into the waterproofing and leaking into the lower space.
3. Rainwater seeps into the waterproofing layer through cracks or joints in the insulation layer, causing it to be submerged for a long time. Water then infiltrates through poorly sealed or cracked edges at the overlaps of the waterproofing layer and around pipes or joints, as well as through weaknesses in the finished waterproofing layer due to defects in layered subcontracting. During the insulation layer installation process, damage to the waterproofing layer is inevitable, allowing water to seep in through cracks and breaches, forming long-term water accumulation within the waterproofing layer. This leads to minor leaks during rainy weather and major leaks when it's sunny.

Expansion joint waterproof reinforcement structure diagram

Expansion joint waterproof reinforcement scheme features

Expansion joint waterproof reinforcement construction plan uses waterproof materials matched to the structural layer defects and construction environment. The root corners of the expansion joint vertical walls, cracks, and hollows in the floor slab base, are treated with Leak Stopper for rigid reinforcement. The rigid leak-proof layer is shaped into an arc and coated with a non-settling rubber waterproof layer, as well as on the floor and vertical wall base surfaces. The chemical reaction is complemented by physical adsorption, forming a rigid-flexible waterproof bond that is firmly attached, to eliminate stresses caused by changes in the base layer of the expansion joint vertical walls. This allows the蠕变型non-settling rubber waterproof layer to have sufficient tensile strength, effectively resisting damage from external stresses.