In construction, the throwing and joint of waterproofing membrane, what is the throwing and what is

The width of the working surface is generally greater than the width of the coil, which needs to be connected, and a part of the repetition between the two is called a joint. If part of the waterproofing is done first, and the other part does not have a working surface, you need to wait for a period of time to do it, so leave a head, called throwing a chariot, such as the waterproofing of the foundation plate and the waterproofing of the exterior wall.

The waterproofing membrane requires good water resistance and stability to temperature changes (no flowing, no blistering, no confusion at high temperatures; No brittleness at low temperature), certain mechanical strength, elongation and fracture resistance, and certain flexibility and aging resistance.

Extended information: the ability to maintain the original properties under a certain temperature change without flowing, foaming, or sliding at high temperatures, and without brittleness at low temperatures. It is commonly used to express heat resistance, heat resistance and other indicators.

Modified asphalt waterproofing membrane.

Compared with the traditional oxidized asphalt, the temperature range of modified asphalt is greatly expanded, and the membrane made of it is smooth and soft, which can be made into 3-5mm thickness, can be used in a single layer, and has a reliable waterproof effect of 15-20 years.

When the double-layer method is adopted, the upper and lower layers of coil should be staggered by 1 3 or 1 2 widths and different seams. In the yin and yang corners of the roof, gutters, rainwater outlets, ridges, lap joints and end joints, wrinkles, hollowing, warping, delamination and slippage are not allowed. It can also be applied by cold bonding.

After the construction is completed, observe and check the construction quality by yourself. Spiked shoes are not allowed to be used for operation.

If the construction materials are flammable, attention should be paid to fire safety and fire extinguishing equipment should be prepared. The coil should be stored in a ventilated place upright, and should not be exposed to the sun or in contact with heat sources.

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In the field of building construction, when the waterproofing membrane is constructed, the width of the working surface is generally greater than the width of the membrane, which needs to be connected, and a part of the two pieces should be repeated is called jointing; If part of the waterproofing is done first, and the other part has no working surface, you need to wait for a period of time to do it, so you can leave a head, which is called a throw, such as the waterproofing of the foundation raft and the waterproofing of the exterior wall. The foundation raft, also known as the foundation slab, refers to the reinforced concrete slab located at the bottom of the building structure, and the foundation cushion is provided below the foundation raft, which is usually a concrete cushion. At present, in China's housing construction project, the foundation raft waterproof membrane throwing chariot protection construction basically still adopts the traditional construction method, the traditional construction method adopts the mode of masonry protection wall along the periphery of the foundation cushion after the foundation cushion construction is completed, the temporary protective wall needs to be broken first during the construction, and then the waterproof membrane is cleaned up, and then the joint construction method is carried out, and the above-mentioned traditional construction method not only has slow construction speed, low construction efficiency, and high cost.