A water-swellable solidified material

Abstract

The invention provides a water-swellable solidified material, which comprises a solidified material, a rigid coating material and an expansion material, and the rigid coating material is coated on the surface of the solidified material to form a "shell core" structure. The invention covers the surface of the solidified material with a rigid coating material to form a "shell-core" structure, which effectively avoids the contradiction between expansion and solidification at the same time. Extrusion realizes pre-blocking and at the same time squeezes the "shell core" structure. When the pressure on the "shell" exceeds the upper limit, it ruptures. After the rigid covering material is broken, it can be used as a filler, and the water further reacts with the curing component , under the joint action of the three, the plugging and anti-seepage can be better completed.

Description

technical field [0001] The invention belongs to the field of leakage plugging, in particular to a water-swellable solidification material. [0002] technical background [0003] With the strengthening of people's awareness of environmental protection, landfills and other places involving the leakage of dangerous liquids have adopted multi-level protective measures. Since it is difficult to effectively evaluate the effect of these protective measures due to geological effects, they are often added to them. Leakproof material. Water-swelling (such as water-absorbing resin) and water-curing (such as cement) are two common types of leak-proof materials. The former swells when it meets water, and the latter undergoes a curing reaction and solidifies when it meets water. The effect of blocking holes. [0004] However, these two types of materials still have some deficiencies in engineering applications. [0005] The water-swellable material introduces water molecules into the po...

AI Technical Summary

Problems solved by technology

However, leakage often occurs on the interface with high pressure difference. It takes a certain amount of time for the cement to solidify (the early strength is small, and the strength is strong after complete solidification), and the solidification process requires a relatively static environment, otherwise the bonding and connection of hydrates will be affected. , and once holes are formed on the interface with high pressure difference, the water flow will flow out continuously, disturbing the overlapping and connection of hydrates, and the early strength of cement is weak, so it is difficult to withstand the impact of water flow at the interface with high pressure difference, so it is difficult to form an effective to block