JP2009057439A - Method for immobilizing asbestos - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for immobilizing asbestos, preventing the dispersion of the asbestos from an asbestos-containing member, preventing markedly the asbestos from dispersing for a long period of time, also enabling its continuous use by regenerating (improving the strength of the asbestos-containing member and also safening it to such a state as needing no dissection or removal) the asbestos-containing member. <P>SOLUTION: This method for immobilizing the asbestos is provided by penetrating with a large amount of an asbestos-immobilizing composition having a high penetrativeness from the surface side of the asbestos-containing member to improve the strength of the asbestos-containing member and also immobilize the asbestos in the asbestos-containing member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to an asbestos immobilization method for an asbestos-containing member using an asbestos immobilization composition.

Asbestos is imported into Japan in large quantities from 1960 to 2000, and imports continue until 2004, and a large amount of stock is still stored. Because of its good fireproofing and heat insulation properties, it has been used as a building material in many buildings such as houses, public facilities, schools and factories. However, in recent years, many diseases caused by asbestos (asbestosis, lung cancer, pleural and peritoneal mesothelioma) have been reported, and handling of materials containing asbestos, especially asbestos when dismantling buildings Scattering, the processing method of asbestos-containing members and the shortage of disposal sites are problems.

Conventionally, emulsion paints with large particles have been used as the undercoat paint for building painting. Its operational purpose is to bond the paint member and the topcoat paint, and the topcoat paint with small particles penetrates the paint member with an emphasis on weather resistance. This is to prevent this. For this reason, the undercoat paint generally adheres only to the surface of the painted member to form a coating film. This is not the case for substrates such as metals, which have a high bond density.

Conventionally, when removing a member containing asbestos, a spraying agent having high viscosity is sprayed on the surface of the member containing asbestos to form a coating film on the surface, and then the member is mechanically peeled off. A method of removing is used. For example, in Patent Document 1 and the like, a viscous scatter preventive agent is sprayed onto the surface of asbestos to form a film, and when the asbestos is peeled off, the asbestos is wrapped and held in the scatter preventive agent while suppressing scattering. A method for removing asbestos is disclosed.
In addition, asbestos scattering prevention composition is impregnated inside the asbestos member so that the asbestos scattering can be remarkably prevented in a small amount and in a short processing time, and the treatment of the member containing asbestos can be remarkably prevented. An invention which aims to provide a method is disclosed in Patent Document 2.

However, these have been invented and implemented mainly for the purpose of removing and removing members containing asbestos, and do not have the gist of reusing asbestos-containing members, and are difficult to withstand practical use. Even in the invention of Patent Document 2, the effect is very thin for exterior building materials such as walls and roofs unless the amount of permeable paint used is large.

JP-A-8-199832 JP2007-92017A (P2007-92017A)

Therefore, the present invention is an asbestos immobilization method completed in order to solve the above-mentioned problems, and does not form a film of a scattering inhibitor on the surface of an asbestos-containing member, but has a highly permeable asbestos immobilization composition. An object of the present invention is to significantly prevent the asbestos from scattering over a long period of time by effectively impregnating the inside of the asbestos-containing member.
In addition, the present invention regenerates the asbestos-containing member by fixing the asbestos to the asbestos-containing member by an effective method using the asbestos-immobilizing composition (safety to the state where disassembly and removal of the asbestos-containing member is not required) It aims to provide a method that enables continuous use. In the present invention, asbestos refers to those in which serpentine and amphibole are in the form of fibers, and so-called asbestos.

  In order to solve the above-mentioned problem, the asbestos immobilization method of the present invention is an asbestos-containing member impregnated with an asbestos-containing member by impregnating the asbestos-immobilizing composition mainly composed of an epoxy resin having high permeability to the asbestos-containing member. It is characterized by fixing. That is, an asbestos-immobilized composition mainly composed of an epoxy resin paint having a low viscosity, fine particles, and high permeability is used for a member containing asbestos, without using an emulsion paint having high viscosity and large particles. Asbestos is fixed by impregnation.

  According to the asbestos immobilization method of the present invention, an asbestos-immobilized composition having a highly permeable asbestos component as a main component is contained in asbestos, instead of forming a film of the asbestos-immobilized composition on the surface of the asbestos-containing member. By effectively impregnating the inside of the member, it is possible to significantly prevent asbestos from being scattered over a long period of time. In addition, asbestos-containing members can be regenerated (fixed to a state where disassembly and removal of asbestos-containing members are not required) by using the asbestos fixing method of the present invention to fix asbestos on the asbestos-containing members and can be used continuously. It becomes.

Hereinafter, details of the asbestos immobilization method of the present invention will be described based on examples.

  An asbestos-immobilized composition having a low viscosity, fine particles, and a highly permeable epoxy resin as a main component was obtained. The composition was applied to a ceramic siding material (asbestos-containing member) having a thickness of 15 mm using a roller so as to have a predetermined coating amount, and left standing (at atmospheric temperature of 20 ° C., humidity of 60%, drying time of 24 time). The presence or absence of film formation by the composition on the surface of the asbestos-containing member after coating was determined visually. Moreover, the penetration depth of the composition into the asbestos-containing member after coating was measured by visually observing a cross section of the asbestos-containing member. Further, the bending strength of the asbestos-containing member after coating was measured by visually checking the bending state by the tester. As a result of coating the composition on the asbestos-containing member, there was little film formation on the surface of the asbestos-containing member, the penetration depth into the asbestos-containing member was 7 to 10 mm, and the strength of the asbestos-containing member was improved. As described above, the asbestos contained in the asbestos-containing member after painting is fixed to the asbestos-containing member, and has a sufficient penetration depth and strength to remarkably prevent asbestos scattering over a long period of time. .

The asbestos immobilization method of the present invention is suitably used for repair work such as a building using a member containing asbestos or diatomaceous earth, reinforcement treatment, and the like.

Claims (1)

  An asbestos immobilization method characterized by immobilizing asbestos to an asbestos-containing member by impregnating the asbestos-containing member with an asbestos-immobilizing composition whose main component is an epoxy resin having high permeability to the asbestos-containing member.