CN108318669A - A kind of phase change concrete early hydration performance testing device - Google Patents
A kind of phase change concrete early hydration performance testing device Download PDFInfo
- Publication number
- CN108318669A CN108318669A CN201810120955.9A CN201810120955A CN108318669A CN 108318669 A CN108318669 A CN 108318669A CN 201810120955 A CN201810120955 A CN 201810120955A CN 108318669 A CN108318669 A CN 108318669A
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- Prior art keywords
- phase change
- fiber
- change concrete
- sensor
- grating
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Links
- 230000008859 change Effects 0.000 title claims abstract description 49
- 238000006703 hydration reaction Methods 0.000 title claims abstract description 21
- 230000036571 hydration Effects 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 title claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000002474 experimental method Methods 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 239000012782 phase change material Substances 0.000 abstract description 14
- 230000009466 transformation Effects 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000003094 microcapsule Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000010512 thermal transition Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- G01N33/383—Concrete or cement
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
- G01N25/08—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering of boiling point
- G01N25/10—Analysis by measuring change of boiling point
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Ceramic Engineering (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to Geotechnical Engineering fields, disclose a kind of phase change concrete early hydration performance testing device, the device includes phase change concrete sample and fiber-optic grating sensor, the phase change concrete sample is placed in model casing, is internally provided with fiber Bragg grating strain sensor and fiber-optical grating temperature sensor.The present invention can measure strain variation rule in hydration process by the way that fiber Bragg grating strain sensor is arranged inside phase change concrete；By arranging fiber-optical grating temperature sensor inside phase change concrete, the changing rule of temperature in hydration process can be measured；By straining in phase change concrete hydration process and the changing rule of temperature, it can determine the best ratio of mud with this, be that the preparation of phase change concrete selects rational phase-change material type and volume range.Apparatus of the present invention, simple in structure, economic and practical, operability is strong, it is easy to accomplish.
Description
Technical field
The invention belongs to Geotechnical Engineering fields, are related to the laboratory experiment of the performance test of phase change concrete, especially relate to
And a kind of phase change concrete early hydration performance testing device.
Background technology
Phase-change material becomes conversion by solid-liquid-gas phase to be completed to inhale exothermic process, which has been widely applied to every profession and trade
Energy temporarily store, be a kind of effective and cheap heat tuning manner.Phase-change material be mothballed microcapsules, diatomite,
In the porous medias such as haydite, the novel aggregate with desirable physical mechanical property is formed.Phase transformation composite aggregate is incorporated into coagulation
In soil, it is can absorb hydration heat of cement, avoids internal stress caused by mass concrete aquation heat localization.Such technology by
Work(it is applied to geotechnical engineering field.
As a kind of novel in the way of shallow layer geothermal energy, energy stake combines ground-source heat pump system and pile foundation
Come, has the characteristics that economy and environmental-friendly.Traditional energy stake pile body concrete has thermal conductivity height, thermal capacitance lower
Feature, and then thermal coefficient is low, specific heat capacity is high for pile peripheral earth, therefore, between stake soil efficiency of thermal transfer is relatively low, and heat is difficult to by energy
Amount stake is fully transferred to the periphery soil body, to reduce the thermal transition efficiency and bearing capacity of energy stake.
In conclusion by phase change concrete be introduced into energy stake design among, according to design requirement, change phase-change material
Volume improves the thermophysical property and mechanical characteristic of phase-transition concrete material, improves the thermal transition efficiency of energy stake, improves energy
Long-time bearing performance of the stake under Thermal-mechanical Coupling effect has important practical significance for the development of energy stake technology.Therefore, mesh
It is preceding that the best ratio of mud is determined with this there is an urgent need for accurately measuring the device and method of phase change concrete early hydration performance, it is phase transformation
The preparation of concrete selects rational phase-change material type and volume range.
Invention content
Present invention aims to overcome that the deficiency of existing test device and means, provides a kind of phase change concrete early hydration
Performance testing device and method can be phase change concrete by studying temperature and strain variation rule in early stage hydration process
Preparation select rational phase-change material type and volume range.
Technical scheme of the present invention：
A kind of phase change concrete early hydration performance testing device, including phase change concrete sample 3 and optical fiber grating sensing
Device, the phase change concrete sample 3 are placed in model casing 4, are internally provided with thin copper pipe 14；The fiber-optic grating sensor
Including fiber-optical grating temperature sensor 1 and fiber Bragg grating strain sensor 2, the fiber Bragg grating strain sensor 2 is placed in phase
Become inside concrete sample 3, arranged along its depth, measures the strain variation of 3 hydration process of phase change concrete sample；The light
Fine grating temperature sensor 1 is placed in inside thin copper pipe 14, is longitudinally arranged, the hydration process for measuring phase change concrete sample 3
Temperature change；The fiber-optical grating temperature sensor 1 and 2 end of fiber Bragg grating strain sensor is and fiber grating demodulation
Instrument 11 connects, and the fiber Bragg grating (FBG) demodulator 11 and computer 12 connect, and carries out real-time reading and the note of related measurement data
Record；
The model casing 4 is placed in during the experiment in the insulating box 9 of Homothermal Proof Box 6；Outside the model casing 4
It is provided with one layer of heat-barrier material 5；There are four universal wheels 10 for 9 bottom of the insulating box installation；The fiber Bragg grating (FBG) demodulator
11 and computer 12 be placed on horizontal operating platform 13.
The phase change concrete sample according to experiment demand, addition variety classes, property and proportioning phase-change material and
Phase transformation composite aggregate, the phase-change microcapsule encapsulate different types of phase-change material by porous ceramic grain and form.Changed by analyzing
Experimental result after phase-change material and phase transformation composite aggregate match in experiment can be that the preparation of phase change concrete selects rational phase
Become material category and volume range.
Beneficial effects of the present invention：By the way that fiber Bragg grating strain sensor is arranged inside phase change concrete, water can be measured
Strain variation rule during change；By arranging fiber-optical grating temperature sensor inside phase change concrete, aquation mistake can be measured
The changing rule of temperature in journey；In experimentation, test tube is placed in inside vacuum heat-insulation case, can avoid environment temperature and experiment is tied
The influence of fruit；By straining in phase change concrete hydration process and the changing rule of temperature, the best ratio of mud can be determined with this,
Rational phase-change material type and volume range are selected for the preparation of phase change concrete.Apparatus of the present invention, simple in structure, economy is suitable
With operability is strong, it is easy to accomplish.
Description of the drawings
Fig. 1 is general arrangement schematic of the present invention.
Fig. 2 is phase change concrete sample cross schematic diagram of the present invention.
Fig. 3 is phase change concrete sample Longitudinal cross section schematic of the present invention.
In figure：1 fiber-optical grating temperature sensor；2 fiber Bragg grating strain sensors；3 phase change concrete samples；4 model casings；
5 heat-barrier materials；6 Homothermal Proof Box；7 heat-insulating plugs；8PLC control panels；9 thermostatic chambers；10 universal wheels；11 fiber Bragg grating (FBG) demodulators；
12 computers；13 shelves；14 thin copper pipes.
Specific implementation mode
Below in conjunction with the accompanying drawings and technical solution, the specific implementation mode of the present invention is described in detail.
It is as shown in Figure 1 the general arrangement schematic of the present invention, is illustrated in figure 2 the phase change concrete sample of the present invention
Cross-sectional view is illustrated in figure 3 the phase change concrete Longitudinal cross section schematic of the present invention.When being tested, needed according to experiment
It asks, the phase-change material and phase transformation composite aggregate that variety classes, property and proportioning are added in ordinary cement prepare phase change concrete
Sample 3；Phase-change microcapsule encapsulates different types of phase-change material by porous ceramic grain and forms.Then phase change concrete sample 3 is existed
It is prefabricated in model casing 4, at the same time, longitudinally disposed fiber Bragg grating strain sensor 2 and thin copper pipe in phase change concrete sample 3
14；Fiber-optical grating temperature sensor 1 is placed in copper tube 14, and temperature changes in measurable 3 hydration process of phase change concrete sample
Become；Fiber Bragg grating strain sensor 2 and 1 end of fiber-optical grating temperature sensor and fiber Bragg grating (FBG) demodulator 11 connect, optical fiber light
Grid (FBG) demodulator 11 and computer 12 connect, and can carry out real-time reading and the record of related measurement data.Change experiment by analyzing
Experimental result after middle phase-change material and phase transformation composite aggregate proportioning can be that the preparation selection of phase change concrete in engineering practice is closed
The phase-change material type and volume range of reason.
Since 3 hydration reaction of phase change concrete sample is very fast, operation is rapid when testing.When experiment, constant temperature is manipulated
Temperature is arranged according to experiment demand in the PLC control panels 8 of case 6；The model casing 4 of prefabricated phase change concrete sample 3 is placed in perseverance
In the thermostatic chamber 9 of temperature test box 6；4 outside of model casing is provided with heat-barrier material 5, to prevent from radiating for experimental measurements
It influences；Fiber Bragg grating strain sensor 2 and fiber-optical grating temperature sensor 1 are drawn by the hole of heat-insulating plug 7, with fiber grating
(FBG) demodulator 11 connects.
In the overall process of experiment, fiber Bragg grating (FBG) demodulator 11 and computer 12 are placed on shelf 13, easy to operation；Constant temperature
There are four universal wheels 10 for the installation of 6 bottom of chamber, can be according to the experiment convenient movement of demand.
Claims (1)
1. a kind of phase change concrete early hydration performance testing device, which is characterized in that the phase change concrete early hydration
Performance testing device includes phase change concrete sample (3) and fiber-optic grating sensor, and the phase change concrete sample (3) is placed in
In model casing (4), it is internally provided with thin copper pipe (14)；The fiber-optic grating sensor includes fiber-optical grating temperature sensor
(1) it is placed in phase change concrete sample (3) with fiber Bragg grating strain sensor (2), the fiber Bragg grating strain sensor (2)
Portion is arranged along its depth, measures the strain variation of phase change concrete sample (3) hydration process；The optical fiber grating temperature passes
Sensor (1) is placed in thin copper pipe (14) inside, is longitudinally arranged, the temperature of the hydration process for measuring phase change concrete sample (3)
Variation；The fiber-optical grating temperature sensor (1) and fiber Bragg grating strain sensor (2) end is and fiber Bragg grating (FBG) demodulator
(11) it connects, the fiber Bragg grating (FBG) demodulator (11) and computer (12) connection carry out the real-time reading of related measurement data
And record；
The model casing (4) is placed in during the experiment in the insulating box (9) of Homothermal Proof Box (6)；The model casing (4)
Outside is provided with one layer of heat-barrier material (5)；There are four universal wheels (10) for insulating box (9) bottom installation；The optical fiber
Grating demodulation instrument (11) and computer (12) are placed on horizontal operating platform (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810120955.9A CN108318669A (en) | 2018-02-05 | 2018-02-05 | A kind of phase change concrete early hydration performance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810120955.9A CN108318669A (en) | 2018-02-05 | 2018-02-05 | A kind of phase change concrete early hydration performance testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108318669A true CN108318669A (en) | 2018-07-24 |
Family
ID=62902088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810120955.9A Pending CN108318669A (en) | 2018-02-05 | 2018-02-05 | A kind of phase change concrete early hydration performance testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108318669A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201837605U (en) * | 2010-09-25 | 2011-05-18 | 中建商品混凝土有限公司 | Hydration temperature-rise tester for concrete |
| CN102243066A (en) * | 2011-04-12 | 2011-11-16 | 大连理工大学 | Hybrid-range FBG (fiber bragg grating) strain and crack sensor for concrete material package |
| CN207730765U (en) * | 2018-02-05 | 2018-08-14 | 大连理工大学 | A kind of phase change concrete early hydration performance testing device |
-
2018
- 2018-02-05 CN CN201810120955.9A patent/CN108318669A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201837605U (en) * | 2010-09-25 | 2011-05-18 | 中建商品混凝土有限公司 | Hydration temperature-rise tester for concrete |
| CN102243066A (en) * | 2011-04-12 | 2011-11-16 | 大连理工大学 | Hybrid-range FBG (fiber bragg grating) strain and crack sensor for concrete material package |
| CN207730765U (en) * | 2018-02-05 | 2018-08-14 | 大连理工大学 | A kind of phase change concrete early hydration performance testing device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180724 |