Title:
超高強度繊維補強モルタルの吹付け工法及びモルタル硬化体
Document Type and Number:
Japanese Patent JP5713540
Kind Code:
B2
Abstract:
To provide a spraying method where the compressive strength of a mortar hardened body on curing on site is ≥150 N/mm2, bending strength is ≥20 N/mm2, and a bending strength/compressive strength ratio is ≥1/9.
In the spraying method, ultra-high strength fiber-reinforced mortar obtained by kneading: a binder composed of cement, silica fume, coal gasification fly ash and gypsum each in a specified blending ratio; fine aggregate of 50 to 200 pts.mass to 100 pts.mass of the binder; fibers with a length of 5 to 30 mm in a 0.5 to 3 vol.% to 1 m3of mortar composed of the binder, the fine aggregate and water; and water, is fed under pressure by a pump, and is sprayed using compressed air so as to obtain a mortar hardened body. In the mortar hardened body, the compressive strength is ≥150 N/mm2, the bending strength is ≥20 N/mm2, and the bending strength/compressive strength ratio is ≥1/9. There is also provided an ultra-high strength fiber-reinforced mortar hardened body.
COPYRIGHT: (C)2010,JPO&INPIT
Inventors:
Akitoshi Araki
Kiminori Ashida
Yoshiharu Watanabe
Akira Watanabe
Application Number:
JP2009025902A
Publication Date:
May 07, 2015
Filing Date:
February 06, 2009
Assignee:
DENKI KAGAKU KOGYO KABUSHIKI KAISHA
International Classes:
C04B28/02; C04B14/38; C04B14/48; C04B16/06; C04B18/08; C04B18/14; C04B22/08; C04B22/14; E04G21/02
Domestic Patent References:
Other References:
後藤充志、吹付けモルタルのはね返りと吹付け圧力との関係、土木学会第52回年次学術講演会講演概要集、土木学会、1997年、第1098-1099頁
谷口秀明、吹付けモルタルの強度発現性に関する研究、セメント・コンクリート論文集、社団法人セメント協会、1998年12月25日、第52号、第584-590頁
