Composite adsorption material capable of reducing precipitation rate of radon in concrete

Abstract

The embodiment of the invention discloses a composite adsorption material capable of reducing the precipitation rate of radon in concrete. The composite adsorption material comprises the following components in percentage by weight: 60%-95% of active carbon, 2%-25% of silica fume and 2%-20% of zeolite powder. The composite adsorption material is directly added into concrete; zeolite powder enhances the mixing effect of each component and concrete while playing an adsorption role, so that the composite adsorption material is evenly distributed in concrete; moreover, silica fume can fully block pores among concrete particles; meanwhile, active carbon captures precipitated radon atoms so as to control the release of nitrogen from the source; the cooperation of the effects can directly reduce the concentration of radon indoors so as to solve the indoor radon pollution problem, and great significance in industrial production and daily life is realized.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to a composite adsorption material for reducing the radon precipitation rate in concrete. Background technique [0002] With the development of industrial technology and the improvement of people's living standards, the increase in the level of natural radiation exposure caused by human production practices, as a factor that causes harm to public health and the environment, has increasingly attracted widespread attention from the society. The International Agency for Research on Cancer has classified radon as a class I carcinogen. The World Health Organization also lists radon as 19 important environmental carcinogens. According to the latest research results of the United Nations Scientific Committee on Radiation Effects, residents live in a radon concentration of 100Bqm for a lifetime (75 years). -3 The excess relative risk factor for lung cancer caused by the environment was 0.16. Inves...

AI Technical Summary

Problems solved by technology

The radon-proof composite board and the membrane pass through the barrier function to prevent radon from scattering; the radon-proof coating and radon-proof mortar mainly use the formed film to have good compactness so that radon will not escape from the wall into the air, but After the radon-proof paint and radon-proof mortar are sprayed, there will inevitably be cracks in the wall or there are certain gaps in the switch on the wall. Radon will enter the room through these gaps, which will reduce the effect of radon prevention.

Although there are also some radon-proof coatings and radon-proof mortars mixed with radon adsorbents such as zeolite and silica gel, there are also gaps that allow radon to easily enter the room.

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