Water-based micro-nano flaky graphite radon radiation shielding coating and preparation method and construction method thereof

Abstract

The invention relates to a water-based micro-nano flaky graphite radon radiation shielding coating and a preparation method and a construction method thereof. The water-based micro-nano flaky graphiteradon radiation shielding coating is prepared from the following components in percentage by mass: 0.1-2% of water-based micro-nano flake graphite powder; 10-30% of quartz powder; 0-30% of ground calcium carbonate powder, 30-60% of acrylic emulsion, 5-15% of hydroxyethyl cellulose aqueous solution, 10-20% of water, 0.3-1% of dispersing agent, 0.1-0.5% of defoaming agent, 0.3-1.5% of coalescing agent, 0.1-0.5% of thickening agent and 0.1-0.3% of preservative. According to the invention, the defects of long drying time and low speed caused by a plurality of processes in on-site radon radiationshielding coating construction engineering are avoided; the coating can be used for various building structure base surfaces, particularly can be used for special-shaped structures such as cylinders,arc tops and bent corners, has the advantages of waste collection, emission reduction, water-based environmental protection and long service life, and has important application value for radon radiation treatment of constructional engineering.

Description

technical field [0001] The invention belongs to the field of radon radiation control of construction engineering, especially underground engineering, and relates to a water-based micro-nano flake graphite radon radiation shielding coating and a preparation method and a construction method thereof. Background technique [0002] National defense, civil air defense, civil defense and other underground projects have the characteristics of airtight and airtight, humid ground environment, easy to grow mildew, and poor weather resistance due to their deep underground. The radon concentration released by soil and rocks is extremely high, which brings serious radon radiation. Pollution, the current methods of controlling radon pollution are: 1. Ventilation method, which is a traditional and current method, which cures the symptoms but not the root cause, the operation and maintenance costs are high, and the actual application effect is not good; 2. Air purifier method, a test in a nat...

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Problems solved by technology

[0004] 1. The general radon radiation shielding coating is applied by manual layering and batch scraping and brushing, including 2 to 3 layers of putty, 4 to 8 layers of primer and topcoat, and a total of about 10 construction procedures together with the mortar layer. Every time the construction of a material is completed, it needs to be dried before proceeding to the next process. In addition, the underground project is airtight and airtight, and the drying speed of the material is slow. It takes 2 to 3 months to complete. This construction method has a long construction period and is time-consuming. force

[0005] 2. Nano-graphene materials have a wide range of applications, but the cost is high, and nano-scale graphene is easy to agglomerate and has strong hydrophobicity, which is not conducive to the use of water-based coatings, especially the defect of high cost, which seriously limits its promotion application, there is an urgent need for low-cost, water-based micro-nano flake graphite materials for coating preparation

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