A time-controllable water-absorbing expansion plugging type pre-laid membrane

Abstract

The invention discloses a time-controllable water-absorbing expansion plugging type pre-laid roll material, which comprises a waterproof sheet main body, a polymer self-adhesive adhesive layer and a sand anti-adhesive layer coated on the waterproof sheet main body, the said The anti-sticking layer of sand grains is composed of chelated water-absorbent resin particles, starter particles wrapped by alkali-soluble polymers and sand; the chelated water-absorbent resin particles include water-absorbent resin particles and chelating agents chelated on the water-absorbent resin particles, The chelating agent is composed of one or more of calcium chloride, magnesium chloride hexahydrate and ferric chloride. The pre-paved coil material of the present invention can absorb water and swell to close the gap between the coil material and concrete to prevent structural leakage after encountering water, and solve the leakage caused by the poor bonding of the sand anti-sticking layer and the concrete structure of the existing pre-paved coil material. The technical defects of water and leakage make the production method safer and more environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of building waterproof materials, and in particular relates to a pre-laid coil material which can absorb water and expand to seal the gap between the coil material and concrete to prevent structural leakage after being exposed to water. Background technique [0002] Under the current technical conditions, pre-paved anti-adhesive or sand surface waterproofing membranes are often used as pre-paved materials for the waterproofing of underground structure floors. The concrete is poured and rammed on the pre-laid membrane, and when the concrete is cured, it will be closely combined with the sand on the surface of the membrane, so that the membrane can be pasted on the concrete structure to form a good waterproof layer. Prevents the structure from moving water between the membranes. Although this technology has a certain difficulty in laying, it has a good waterproof effect and is more popular in engineering proj...

AI Technical Summary

Problems solved by technology

During the construction of pre-laid coils, it is difficult to fix the boundaries of the coils. At the same time, after the coils are laid, the surface of the coils will be polluted due to the subsequent construction of the upper part of the steel bars, which will cause the separation of the coils and the structure to form gaps. Under the erosion of groundwater or rainwater, water channeling between gaps is caused

In addition, buildings with brick-concrete or concrete structure will have many cracks due to structural deformation, hydration shrinkage of mortar (concrete), thermal expansion and contraction, and groundwater or rainwater will penetrate into the building through cracks, causing Building waterproofing failed

The existence of cracks is also a common problem in construction at present. Although scholars have worked hard in various aspects, cracks in mortar and concrete are still inevitable due to various factors such as construction, maintenance and people.