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How are expansion joints waterproof?

Care should be taken when selecting materials and styles, fully considering the climatic characteristics and engineering geology of the project area, as well as factors such as construction convenience, such as the flat rubber type in the design of the expansion joints on the exterior walls. The aluminum alloy base is inclined and fixed on the inside of the expansion joint, which has a big problem in practice: it is difficult to fix the touch panels on both sides of the expansion joint when pouring concrete, and the size deviation of the components after the concrete is poured and formed is large.

In addition, many elastic rubber bodies on the market are far from meeting the requirements, and the rubber will age after a year or two. This type of deformation seam is difficult to install when the seam width is less than 15cm, especially when the seam width is less than 10cm, it can only be installed theoretically. It is recommended that you try not to choose this deformation seam. The waterproofing of expansion joints varies in every possible place. Therefore, the structure and fortification of the waterproof material and the deformation joint of the roof are unified, that is, multiple fortifications are required to ensure that the waterproof layer is not damaged when the joint changes.

The waterproof side of the high and low expansion joints is the vertical wall, and the other side is the roof. For the same-height expansion joint waterproof high roof expansion joint or double drainage ditch expansion joint, a waterproof layer should be laid high above the roof of the low wall or the side wall of the drainage ditch, and then covered with waterproof synthetic polymer, and the middle of the coil is recessed into the deformation joint. , the grooves are lined with polyethylene foam strips. The two sides overlap with the waterproofing of the roof, and then a layer of synthetic polymer is laid on top of the coil. Both sides should be covered with a layer of lap joints of synthetic polymer, and the upper part should be covered with fine stone concrete or stainless steel cover for waterproofing.

1. According to the selected model, take the center of the weld as the base point, and stake out both sides according to the design drawings to determine the installation position of the deformation seam.
2. According to the determined installation position, fix the aluminum alloy frame on the notch with expansion bolts.
3. When installing the waterstop, a waterproof primer should be applied between the frame, the waterstop and the concrete body.

Post time: 16-05-22