JPS5555257A - Method of measuring constraint expansion coefficient in swelling cement - Google Patents
Method of measuring constraint expansion coefficient in swelling cementInfo
- Publication number
- JPS5555257A JPS5555257A JP12890378A JP12890378A JPS5555257A JP S5555257 A JPS5555257 A JP S5555257A JP 12890378 A JP12890378 A JP 12890378A JP 12890378 A JP12890378 A JP 12890378A JP S5555257 A JPS5555257 A JP S5555257A
- Authority
- JP
- Japan
- Prior art keywords
- force
- constraint
- pressurizing
- specimen
- swelling
- 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
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
PURPOSE: To measure constraint expansion coefficient highly reliably, by adding external force corresponding to the internal stress of a constraint reinforcing rod accompained by the swelling of swelling cement to a specimen.
CONSTITUTION: The quantity of displacement Δl accompained by the swelling of a specimen is measured at a swelling displacement quantity measuring portion 5, constraint force Po is operated 6 on the basis of the value and the constraint force Po and pressurizing force Pr to the specimen detected at a pressurizing force measuring unit 7 are compared 8. Comparison signals are transmitted to a pressurizing force controller 9, and a pressurizing motor 10 is controlled so that Po=Pr be formed. Thus, pressurizing force applied to the specimen is continually controlled in the constraint force Po in the case when using a constraint reinforcing rod. When measuring, the specimen 14 is placed on a pressurizing base 11 and pressurized by means of a pressure plate 17, the first pressurizing force is detected by means of a load cell 15, and the quantity of displacement Δl accompanied by the lapse of time is detected by means of a displacement meter 23 while the cell 15 detects the pressurizing force Pr. Po=Pr is obtained by automatically controlling a pulse motor 12.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12890378A JPS5555257A (en) | 1978-10-19 | 1978-10-19 | Method of measuring constraint expansion coefficient in swelling cement |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12890378A JPS5555257A (en) | 1978-10-19 | 1978-10-19 | Method of measuring constraint expansion coefficient in swelling cement |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5555257A true JPS5555257A (en) | 1980-04-23 |
JPS6136183B2 JPS6136183B2 (en) | 1986-08-16 |
Family
ID=14996199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12890378A Granted JPS5555257A (en) | 1978-10-19 | 1978-10-19 | Method of measuring constraint expansion coefficient in swelling cement |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5555257A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006250820A (en) * | 2005-03-11 | 2006-09-21 | Totaku Industries Inc | Test tube for measuring breathing amount |
JP2013033002A (en) * | 2011-08-03 | 2013-02-14 | Fujita Corp | Water immersion expansion test method and water immersion expansion test device of expansive material and banking construction method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109425729B (en) * | 2017-12-21 | 2021-03-12 | 中国水利水电科学研究院 | Multi-machine joint control concrete variable constraint equipment and method |
-
1978
- 1978-10-19 JP JP12890378A patent/JPS5555257A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006250820A (en) * | 2005-03-11 | 2006-09-21 | Totaku Industries Inc | Test tube for measuring breathing amount |
JP2013033002A (en) * | 2011-08-03 | 2013-02-14 | Fujita Corp | Water immersion expansion test method and water immersion expansion test device of expansive material and banking construction method |
Also Published As
Publication number | Publication date |
---|---|
JPS6136183B2 (en) | 1986-08-16 |
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