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A platform for research: civil engineering, architecture and urbanism
LIGHTWEIGHT GYPSUM PRODUCT HAVING HIGH WATER RESISTANCE
PROBLEM TO BE SOLVED: To provide a water resistant gypsum product having improved strength property after prolonged contact with water and capable of being produced by a mild drying method.SOLUTION: There is provided a method of producing water-resistant gypsum product from: a settable aqueous calcium sulfate dispersion having a water to solid body ratio of 0.4 to less than 1, the dispersion having distributed therethrough lightweight hollow bodies having water-impervious surfaces; and a hydratable cement capable of being hydrated in the presence of the calcium sulfate dispersion, the hydratable cement being present in an amount of 5 to 15% based on the weight of the hydraulic powder, for reacting with excess water generated from a reaction of the calcium sulfate and water, the calcium sulfate being a hemihydrate gypsum or anhydrous gypsum.SELECTED DRAWING: None
【課題】水との長時間の接触後の強度特性が改善され、温和な乾燥方法で製造できる耐水性石膏製品を提供する。【解決手段】耐水性石膏製品の製造方法であって、前記製品が、０．４対１未満の水対固体比を有する硬化性水性硫酸カルシウム分散液であって、不透水性表面を有する軽量中空体を当該分散液を通じて分配する前記分散液と、前記硫酸カルシウム分散液の存在下で水和可能な水和性セメントであって、前記分散液に存在する、前記硫酸カルシウムと水との反応から生じた過剰な水と反応させるために、前記水和性セメントが水硬性粉末の重量を基準にして５〜１５％の量で存在する前記水和性セメントとから製造され、前記硫酸カルシウムは、半水石膏または無水石膏である、方法。【選択図】なし
LIGHTWEIGHT GYPSUM PRODUCT HAVING HIGH WATER RESISTANCE
PROBLEM TO BE SOLVED: To provide a water resistant gypsum product having improved strength property after prolonged contact with water and capable of being produced by a mild drying method.SOLUTION: There is provided a method of producing water-resistant gypsum product from: a settable aqueous calcium sulfate dispersion having a water to solid body ratio of 0.4 to less than 1, the dispersion having distributed therethrough lightweight hollow bodies having water-impervious surfaces; and a hydratable cement capable of being hydrated in the presence of the calcium sulfate dispersion, the hydratable cement being present in an amount of 5 to 15% based on the weight of the hydraulic powder, for reacting with excess water generated from a reaction of the calcium sulfate and water, the calcium sulfate being a hemihydrate gypsum or anhydrous gypsum.SELECTED DRAWING: None
【課題】水との長時間の接触後の強度特性が改善され、温和な乾燥方法で製造できる耐水性石膏製品を提供する。【解決手段】耐水性石膏製品の製造方法であって、前記製品が、０．４対１未満の水対固体比を有する硬化性水性硫酸カルシウム分散液であって、不透水性表面を有する軽量中空体を当該分散液を通じて分配する前記分散液と、前記硫酸カルシウム分散液の存在下で水和可能な水和性セメントであって、前記分散液に存在する、前記硫酸カルシウムと水との反応から生じた過剰な水と反応させるために、前記水和性セメントが水硬性粉末の重量を基準にして５〜１５％の量で存在する前記水和性セメントとから製造され、前記硫酸カルシウムは、半水石膏または無水石膏である、方法。【選択図】なし
LIGHTWEIGHT GYPSUM PRODUCT HAVING HIGH WATER RESISTANCE
高耐水性を有する軽量石膏製品
ROBIN DANIEL FISHER (author)
2016-02-25
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
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