Title:
METHOD AND APPARATUS FOR ESTIMATION OF STRENGTH OF CONCRETE
Document Type and Number:
Japanese Patent JP3672526
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To estimate the compressive strength of concrete with high accuracy by a nondestructive testing method.
SOLUTION: The repulsion degree Rs on the surface of the concrete as a measuring object is measured by a concrete test hammer 14, and its carbonization depth C is measured by a carbonization-depth measuring machine 16. In an apparatus mainframe 12, a surface-hardness correction coefficient β as the ratio of the hardness in a carbonized surface part of the concrete to the hardness of the noncarbonized inside is stored so as to be related to the carbonization depth C of the concrete. As the correction coefficient β, a value corresponding to a measured value of the carbonization depth C is set, a correction repulsion degree Ri corresponding to the repulsion degree at the inside of the concrete is found by Ri=β×Rs-(1-β)×b/a, and the compressive strength Fc is estimated and computed based on the correction repulsion degree Ri.
Inventors:
Fumio Oshida
Toshio Yonezawa
Kenro Mitsui
Shigeki Seko
Masao Odagawa
Toshio Yonezawa
Kenro Mitsui
Shigeki Seko
Masao Odagawa
Application Number:
JP2001376030A
Publication Date:
July 20, 2005
Filing Date:
December 10, 2001
Export Citation:
Assignee:
TAKENAKA CORPORATION
Kansai Electric Power Co., Inc.
Kinki Concrete Industry Co., Ltd.
Kansai Electric Power Co., Inc.
Kinki Concrete Industry Co., Ltd.
International Classes:
G01N17/00; G01N3/30; G01N3/52; G01N3/60; G01N33/38; (IPC1-7): G01N3/52; G01N3/30; G01N3/60; G01N17/00; G01N33/38
Domestic Patent References:
| JP11051933A | ||||
| JP10307094A | ||||
| JP2001289829A |
Attorney, Agent or Firm:
Atsushi Nakajima
Kato Kazunori
Katsuichi Nishimoto
Hiroshi Fukuda
Kato Kazunori
Katsuichi Nishimoto
Hiroshi Fukuda