Experiments on the influence of building material selection upon indoor chemical concentration

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  • 建材選定が室内化学物質濃度に与える影響に関する実験
  • ケンザイ センテイ ガ シツナイ カガク ブッシツ ノウド ニ アタエル エイキョウ ニ カンスル ジッケン

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Abstract

In addition to clarifying the indoor concentration when natural materials and industrial building materials are used and the indoor concentration decreasing effect due to formaldehyde adsorption, the purpose of this study is to clarify the validity of a measurement method for each construction phase as a method of identifying the cause of high chemical concentration. For this experiment, we built an experimental house from wall materials characterized by natural materials and from industrialized building materials and measured the concentration of formaldehyde (DNPH-HPLC method) and of VOC (sampling using Glass Prepacked ATD Tubes and GC-MS analysis) at each construction phase over a period of a year. As a result, we discovered an inflow of formaldehyde from inside the walls as well as indoor pollutants. In response to this, it is necessary to verify the emission rate of the materials on the outside of the airtight layer (for example, heat insulating materials and the back of the outer wall). An increase in the concentration of TVOC was apparent after construction of the wall materials and floor boards and a decrease over a relatively long period was not evident. It is necessary to consider TVOC concentration for VOCs Vaporization building materials, such as adhesives highlighted in the past, and also for constituents of the plastering material. It is also necessary to conduct measurements at each construction phase to identify the cause of emission (particularly measurements after carrying out wet construction using coating and adhesive) and to establish curing period from the measurement results.

Journal

  • Indoor Environment

    Indoor Environment 16 (1), 23-34, 2013

    Society of Indoor Environment, Japan

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