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Title:
BUILDING BOARD
Document Type and Number:
Japanese Patent JP2017008637
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a building board, which is an inorganic building plate having a core layer and a skin layer and resistant to freezing damage, specifically is less likely to cause interlayer detachment due to freezing damage.SOLUTION: A building board 1 comprises: a core layer 2 made of molding material containing hydraulic inorganic material; and a skin layer 3, which is made of a molding material containing hydraulic inorganic material and covers the core layer 2. Bone-dry specific gravity of the skin layer 3 is greater than that of the core layer 2. The bone-dry specific gravity of the skin layer 3 is 0.8 or greater and 2.0 or less, and that of the core layer 2 is 0.7 or greater or less than 2.0. Volume of all pores with diameter of 0.056 to 2 μm on the skin layer 3 and the core layer 2 is 0.25 ml/g or less.SELECTED DRAWING: Figure 1

Inventors:
FURUMIYA TAKASHI
OKAJIMA YUSAKU
SHIROMOTO HIROYUKI
YAMAMOTO TOMOHISA
KITAMURA TAKURO
Application Number:
JP2015126726A
Publication Date:
January 12, 2017
Filing Date:
June 24, 2015
Export Citation:
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Assignee:
KMEW CO LTD
International Classes:
E04F13/14; B28B3/20; C04B16/02; C04B16/06; C04B28/02
Domestic Patent References:
JP2006265063A2006-10-05
JPH07126057A1995-05-16
JPH1058422A1998-03-03
Other References:
鎌田英治　外２名: "２．各種セメントを用いた硬化セメントペーストの耐凍害性と内部細孔構造", 日本建築学会北海道支部第３５回研究発表会, JPN7019000536, March 1971 (1971-03-01), pages 7 - 11
鎌田英治　外３名: "コンクリートの耐凍害性におよぼす細孔構造の役割についての統計的解析", 日本建築学会構造系論文集, vol. 第４８７号, JPN7019000537, September 1996 (1996-09-01), pages 1 - 9
Attorney, Agent or Firm:
Keisei Nishikawa
Mizuhiji Katsuhisa
Yoshishige Takeo
Takeshi Sakaguchi
Hidetoshi Kitade
Nakaishi Haruki
Yutaka Kimura



 
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