JPS56160636A - Estimating method for strenght of placed concrete - Google Patents

Estimating method for strenght of placed concrete

Info

Publication number
JPS56160636A
JPS56160636A JP6461380A JP6461380A JPS56160636A JP S56160636 A JPS56160636 A JP S56160636A JP 6461380 A JP6461380 A JP 6461380A JP 6461380 A JP6461380 A JP 6461380A JP S56160636 A JPS56160636 A JP S56160636A
Authority
JP
Japan
Prior art keywords
concrete
strength
drill
bolt
torque
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP6461380A
Other languages
Japanese (ja)
Other versions
JPS627489B2 (en
Inventor
Junji Takagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimizu Construction Co Ltd
Original Assignee
Shimizu Construction Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shimizu Construction Co Ltd filed Critical Shimizu Construction Co Ltd
Priority to JP6461380A priority Critical patent/JPS56160636A/en
Publication of JPS56160636A publication Critical patent/JPS56160636A/en
Publication of JPS627489B2 publication Critical patent/JPS627489B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

PURPOSE:To make it possible to directly and nondestructively estimate the strength of the placed skeleton concrete, by measuring the torque needed when the mortar in the concrete is drilled by using a concrete drill. CONSTITUTION:A bolt 5 in which a test bolt 1 having a concrete drill 2 has beein screwed is screwed into a fixed nut 6. Then, said apparatus is installed on a concrete form 3 and concrete 4 is placed. Under the condition where the concrete 4 has started to solidify and the strength has not become high, the test bolt 1 is rotated by using a torque wrench 10 in order to advance the drill 2 until the tip thereof contacts with the concrete. Thereafter, the test bolt 1 is rotated by using the torque wrench 10 every time an arbitrary hardening time elapses, and the torque value at each point of time is measured and converted into a strength. Whereby, the strength of the skeleton concrete can be accurately grasped. Accordingly, the concrete form placing period can be shortened.
JP6461380A 1980-05-15 1980-05-15 Estimating method for strenght of placed concrete Granted JPS56160636A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6461380A JPS56160636A (en) 1980-05-15 1980-05-15 Estimating method for strenght of placed concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6461380A JPS56160636A (en) 1980-05-15 1980-05-15 Estimating method for strenght of placed concrete

Publications (2)

Publication Number Publication Date
JPS56160636A true JPS56160636A (en) 1981-12-10
JPS627489B2 JPS627489B2 (en) 1987-02-17

Family

ID=13263281

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6461380A Granted JPS56160636A (en) 1980-05-15 1980-05-15 Estimating method for strenght of placed concrete

Country Status (1)

Country Link
JP (1) JPS56160636A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4744404A (en) * 1986-06-25 1988-05-17 Mazda Motor Corporation Foundry sand blowing apparatus
KR100885801B1 (en) 2007-08-06 2009-02-26 재단법인 한국건자재시험연구원 System for controlling a automatic measurement apparatus for a concrete mixture setting time

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4744404A (en) * 1986-06-25 1988-05-17 Mazda Motor Corporation Foundry sand blowing apparatus
KR100885801B1 (en) 2007-08-06 2009-02-26 재단법인 한국건자재시험연구원 System for controlling a automatic measurement apparatus for a concrete mixture setting time

Also Published As

Publication number Publication date
JPS627489B2 (en) 1987-02-17

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