Red sandstone surface modified polyurethane material smeared in water level variation zone and preparation method thereof

Abstract

The invention relates to a red sandstone surface modified polyurethane material smeared in a water level variation zone and a preparation method thereof. The material comprises a component A and a component B, wherein the component A comprises a sodium silicate solution, a catalyst, a plasticizer and nano titanium dioxide; and the component B comprises diisocyanate (MDI), polypropylene glycol (PPG) and a waterproof agent. The material has the advantages of good reinforcing performance, no toxicity and the like of a traditional polyurethane reinforcing material, the water resistance of the material can be effectively improved by adding the waterproof agent, and the material is tightly attached to the surface of red sandstone for water isolation, so that the water environment is isolated, and degradation of the physical and mechanical properties of the red sandstone is inhibited; and finally, considering that the problems that red sandstone is subjected to a large amount of solar ultraviolet radiation for a long time in a dry season in a water level variation zone, water loss of the red sandstone is caused, the surface of the red sandstone falls off, the interior of the red sandstonecracks, and finally, the physical and mechanical properties of the red sandstone are deteriorated, the ageing resistance of the red sandstone can be effectively improved by adding the nano titanium dioxide.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a red sandstone modified polyurethane material applied in a water level amplitude band and a preparation method thereof. Background technique [0002] In the variable range of the reservoir water level, the rock mass has been immersed in the reservoir water and under the action of strong ultraviolet radiation for a long time. The rock mass is most prone to deterioration of macroscopic mechanical strength when exposed to water. There are two main reasons for the strength deterioration of red sandstone in the water level amplitude zone: one is the impoundment stage. It is the hydration reaction between the clay minerals inside the sandstone and water, which causes the clay minerals to absorb water and expand; the second is the dry water stage, when the strong radiation and heat of the sun cause the water inside the rock mass to evaporate, which will cause the clay minerals to lose...

AI Technical Summary

Problems solved by technology

However, compounds containing flame-retardant elements such as phosphorus or phosphorus are likely to cause pollution to the water quality and soil environment around the water-fluctuating zone.

In addition, such as the modified polyurethane material in 201410083359.0, its raw materials contain highly toxic ketones, which are easy to pollute the water quality around the reservoir, so it is not suitable for the reinforcement of red sandstone in the luffing zone of the reservoir

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