JP2007197248A - Asbestos component scattering prevention structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems of an asbestos modifying and curing agent in a conventional asbestos scattering prevention technique, such as problems that it requires time and labor to mix components and time and labor to lightly press the sprayed agent, that it hardly penetrates into an aged brittle area, that it develops insufficient solidification capacity and low weather resistance, and it can not add new functions. <P>SOLUTION: First, the surface of corrugated slate is cleaned without using any high-pressure cleaner. Next, the surface of the corrugated slate is coated with a solvent- or water-based two- or one-part epoxy resin sealer. The surface of the solidification layer is coated with a solvent- or water-based one- or two-part urethane resin or silicone resin coating material. Next, the surface of the first coating layer is re-coated with a resin coating material of the same kind. Thus, an asbestos scattering prevention structure composed of the solidification layer, the first coating layer, and the second layer laminated in this order is formed on the surface of the corrugated slate. If desired, it is also possible to form a high-function structure to which heat shielding properties, heat insulating properties, etc., are added. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an asbestos component scattering prevention structure for preventing asbestos components from scattering from asbestos-containing building materials used in existing buildings.

  Asbestos-containing building materials are used for building roofing materials such as corrugated slate and decorative slate for residential roofs, fireproof covering plates, building wall materials such as ceramic siding and extruded cement boards. This type of asbestos-containing building material scatters asbestos components that have become weakly bonded due to deterioration over time, deterioration due to acid rain, sulfur dioxide, air pollution, and the like into the atmosphere. Since asbestos is a carcinogenic substance and is harmful to the human body, it is becoming a big social problem that the asbestos component is scattered in the atmosphere.

For this reason, conventionally, various techniques for preventing asbestos components from being scattered in the atmosphere have been proposed. For example, in Patent Document 1 below, an alkaline aqueous solution mainly composed of silicates and fine particles of glass are mixed at a volume ratio of 91: 9 to 99: 1, and this mixture is then insulated with asbestos at the site of building demolition. A technique is disclosed in which a material is spray impregnated and lightly pressed to prevent scattering of asbestos components.
JP 2002-137976 A

  However, the conventional asbestos component scattering prevention technique disclosed in the above-mentioned conventional patent document 1 requires time and effort to mix an alkaline aqueous solution mainly composed of silicates with fine particles of glass at a predetermined volume ratio, and deteriorated weakness. It is difficult to penetrate deeply into the part, and the solidification ability is insufficient. In addition, it takes time and effort to lightly press the mixture after spray impregnation, and the weather resistance is weak, and it is difficult to maintain the asbestos component scattering preventing ability for a long time. Furthermore, new functions such as heat insulation, heat insulation, and pollution prevention cannot be added.

  The present invention was made to solve such problems, a solidified layer made of an epoxy resin that is applied to the surface of the asbestos-containing building material and deeply penetrates and solidifies the deteriorated fragile layer of the asbestos-containing building material; A first coating layer made of urethane resin or silicon resin having weather resistance, durability, chemical resistance, heat insulation, heat insulation, or antifouling property applied to the surface of the solidified layer; The second coating layer made of the same type of urethane resin or silicon resin applied over the surface of the coating layer prevents the asbestos component from scattering from the asbestos-containing building material, and also provides heat insulation, heat insulation, and contamination. A structure was added to add new functions such as prevention and mold prevention.

  This asbestos component scattering prevention structure from the asbestos-containing building material is realized by applying a solidified layer, a first coating layer, and a second coating layer in this order to the surface of the asbestos-containing building material. With this structure, the surface of the asbestos-containing building material is hardened by the solidified layer and the asbestos component is prevented from scattering into the atmosphere, and the first coating layer and the second coating layer provide weather resistance, durability, chemical resistance, Asbestos-containing building materials are provided with heat insulation, heat insulation, or anti-contamination properties, extending the life of the asbestos-containing building materials and improving the asset value of the building.

  According to the present invention, for example, asbestos components can be easily scattered from asbestos-containing building materials by simply applying a commercially available epoxy resin paint, urethane resin paint or silicon resin paint to the surface of the asbestos-containing building material. This makes it possible to realize a structure that prevents new functions and adds new functions that have never existed before.

  Next, the best mode for carrying out the present invention, in which the present invention is applied to a corrugated slate used for a roof material of an existing building, will be described.

  Corrugated slate is a product made by mixing cement with asbestos and is often used for the roofs of factories and station buildings because of its thermal insulation and easy manufacturing.

  In order to apply the asbestos scattering prevention structure of the present embodiment to the corrugated slate, first, the surface of the corrugated slate is cleaned. For this cleaning, do not use a high-pressure washing machine that may disperse cleaning dirt in the surrounding area. The removal of the asbestos-containing filth around the construction site is prevented.

Next, a solvent-based or aqueous two-component or one-component epoxy resin sealer with good permeability is applied to the surface of the corrugated slate with a brush, roller or airless spray. The coating amount is about 0.18 to 0.21 [kg / m ² ], and the coating and drying time is about 24 hours to 7 days. As a result, a solidified layer made of an epoxy resin that penetrates deeply into the surface of the corrugated slate and solidifies the corrugated slate surface is formed.

Next, a solvent-type or aqueous two-component or one-component urethane resin paint or silicon resin paint is applied to the surface of the solidified layer with a brush, a roller, or an airless spray. The coating amount is about 0.12 to 0.14 [kg / m ² ], and the coating and drying time is about 4 hours to 7 days. Thereby, the colored 1st coating layer which consists of urethane type resin or silicon-type resin which gives a weather resistance to a solidified layer on the surface of a solidified layer is formed in the thickness of about 25 [micrometers].

Next, a solvent-type or aqueous two-component or one-component urethane resin paint or silicone resin paint is applied to the surface of the first coating layer by brush, roller, or airless spray. This coating amount is also about 0.12 to 0.14 [kg / m ² ]. As a result, a colored second coating layer made of urethane-based resin or silicon-based resin that imparts weather resistance to the solidified layer is formed on the surface of the first coating layer to a thickness of about 25 [μm]. As a result, an asbestos scattering prevention structure in which the solidified layer, the first coating layer, and the second coating layer are laminated in this order is formed on the surface of the corrugated slate. In addition, new functions such as heat shielding properties, heat insulation properties, antifouling properties, and antifungal properties are added to this urethane resin paint or silicon resin paint.

  This structure for preventing asbestos component scattering from the corrugated slate is realized by applying the solidified layer, the first covering layer, and the second covering layer in this order to the surface of the corrugated slate as described above. With this structure, the surface of the corrugated slate is hardened by the solidified layer to prevent the asbestos component in the corrugated slate from being scattered into the atmosphere, and the first coating layer and the second coating layer provide weather resistance. By selecting the type of resin paint to be used for the first coating layer and the second coating layer, the performance of the first coating layer and the second coating layer can be changed to heat insulation, heat insulation, antifouling, mold prevention, as desired. New functions such as sex can be provided. As a result, the life and function of the waveform slate can be increased.

  According to this embodiment, for example, asbestos components can be easily scattered from the corrugated slate simply by applying a commercially available epoxy resin sealer, urethane resin paint or silicon resin paint to the surface of the corrugated slate. It is possible to realize a structure that prevents this. Therefore, it is possible to prevent the asbestos component from being scattered when the waveform slate is deteriorated in the building using the waveform slate and to extend the dismantling time of the building. Therefore, according to the asbestos scattering prevention structure according to the present embodiment, contribution to economy and ecology can be expected.

  In addition, the application amount of each resin paint, the drying time, the film thickness, and the like in the above-described embodiment are merely examples, and are not limited thereto, and can be changed as appropriate.

  In the above embodiment, the case where the present invention is applied to a corrugated slate has been described. However, a building roof material such as a decorative slate for a house roof, a fireproof covering plate, a ceramic siding, an extruded cement plate, or the like The same applies to other asbestos-containing building materials such as wood. In this case, the same effects as those of the above-described embodiment can be obtained.

Claims (1)

  A solidified layer made of an epoxy resin that is applied to the surface of the asbestos-containing building material and deeply penetrates and solidifies the deteriorated fragile layer of the asbestos-containing building material. First coating layer made of urethane resin or silicon resin having heat resistance, heat shielding property, heat insulation property, or anti-contamination property, and the same kind of urethane resin or silicon coated on the surface of the first coating layer An asbestos component scattering prevention structure from an asbestos-containing building material comprising a second coating layer made of a resin.