METHOD FOR PRODUCING GYPSUM BOARD, AND GYPSUM BOARD

To provide a gypsum board having high recycling efficiency and durable for practical use.SOLUTION: A method for producing a gypsum board includes the steps of: preparing a slurry by mixing a gypsum material containing 70 wt.% or more of a recycled gypsum, 0.1-1.0 wt.% of a water-reducing agent, 0.01...

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Bibliographic Details
Main Authors ITO SHIGEKI, YAMANAKA SEIJI, MATSUO KENTARO, KATAOKA MAKOTO, WATANABE TAKASHI
Format Patent
LanguageEnglish
Japanese
Published 23.04.2020
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:To provide a gypsum board having high recycling efficiency and durable for practical use.SOLUTION: A method for producing a gypsum board includes the steps of: preparing a slurry by mixing a gypsum material containing 70 wt.% or more of a recycled gypsum, 0.1-1.0 wt.% of a water-reducing agent, 0.01-0.10 wt.% of a foaming agent, and water; and hardening the slurry. The gypsum material accounts for 90 wt.% or more of the mass obtained by excluding a water content from the total mass of the slurry.SELECTED DRAWING: Figure 1 【課題】リサイクル効率が高く、かつ実用に耐えうる石膏ボードを提供する。【解決手段】石膏ボードの製造方法は、再生石膏を７０重量％以上含有する石膏原料、０．１重量％〜１．０重量％の減水剤、０．０１重量％〜０．１０重量％の発泡剤及び水を混合してスラリーを調整する工程と、前記スラリーを硬化させる工程と、を有する。前記石膏原料は、スラリーの全量から水の含有量を除外した量の９０重量％以上となっている。【選択図】 図１
Bibliography:Application Number: JP20180195062