CN105196409A - Heating device and method for assisting cement test piece in solidification - Google Patents
Heating device and method for assisting cement test piece in solidification Download PDFInfo
- Publication number
- CN105196409A CN105196409A CN201510604909.2A CN201510604909A CN105196409A CN 105196409 A CN105196409 A CN 105196409A CN 201510604909 A CN201510604909 A CN 201510604909A CN 105196409 A CN105196409 A CN 105196409A
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- cement
- microwave
- specimen
- heater
- temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/241—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening using microwave heating means
Abstract
The invention provides a heating device and method for assisting a cement test piece in solidification. The heating device comprises a box, a microwave generator and an infrared temperature sensor, the box is used for containing the cement test piece, the microwave generator is arranged in the box and used for generating microwaves, and the infrared temperature sensor is arranged in the box and used for testing the temperature of the cement test piece. According to the technical scheme, the problem that in the prior art, the solidification time of a cement test piece is too long is effectively solved.
Description
Technical field
The present invention relates to material experiment equipment technical field, the heater solidified in particular to a kind of auxiliary cement specimen and heating means.
Background technology
Carrying out, in true triaxial press simulation process, needing to make a large amount of cement specimen.Method conventional is at present cast by cement mortar in Collapsible mould, tests after waiting for cement slurry sets again.
But under normal temperature, particularly indoor environment temperature lower or envionmental humidity is higher time, cement mortar often needs short then a couple of days, the long then setting time of several weeks.So can consume the great many of experiments time.Further, because cement mortar proportioning has strict restriction, the chemical reagent such as coagulant can not be added.For promoting cement slurry sets speed, reducing setting time, needing to adopt correlation processing technique.
Summary of the invention
The heater that main purpose of the present invention is to provide a kind of auxiliary cement specimen to solidify and heating means, to solve the problem that in prior art, cement specimen setting time is long.
To achieve these goals, according to an aspect of the present invention, provide the heater that a kind of auxiliary cement specimen solidifies, comprising: casing, for holding cement specimen; Microwave generator, is arranged in casing, for generation of microwave; Infrared temperature sensor, is arranged in casing, for testing the temperature of cement specimen.
Further, heater also comprises: controller, and controller is for controlling the break-make of microwave generator.
Further, controller also for receiving the temperature signal of infrared temperature sensor, and controls the break-make of microwave generator according to temperature signal.
Further, heater also comprises: stir ripple device, stirs ripple device and is arranged in casing, for changing micro-direction of wave travel.
Further, heater also comprises: test specimen holding box, and test specimen holding box comprises base plate and is arranged on the multiple side plates on base plate, and multiple side plate and base plate besieged city have the box body of opening surface.
Further, infrared temperature sensor is arranged on test specimen holding box.
Further, casing comprises the rectangular structure with opening surface and is arranged on the door body at opening surface place, the shape of door body and the shape of opening surface suitable.
Further, door body is pivotally connected in opening surface place.
Further, microwave generator comprises: magnetron, for generation of microwave; Waveguide, for transmitting the microwave that magnetron produces.
To achieve these goals, according to an aspect of the present invention, provide the heating means that a kind of auxiliary cement specimen solidifies, comprise and with microwave, cement specimen being heated; While heating, temperature survey is carried out to cement specimen; When the temperature of cement specimen is more than the first predetermined value, suspend heating; When the temperature of cement specimen is lower than the second predetermined value, continue heating.
Apply technical scheme of the present invention, cement specimen is placed in casing, open microwave generator and produce microwave.Under microwave action, make cement mortar inside produce similar friction, temperature raises, and in cement mortar, moisture heats up.Like this, just contribute to the moisture evaporation in cement specimen, accelerate test specimen and solidify, reduce the Hou Ning time, accelerate test progress.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The Figure of description forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation of the embodiment of the heater that auxiliary cement specimen according to the present invention solidifies;
Fig. 2 shows the flow chart of the heating means that auxiliary cement specimen according to the present invention solidifies;
Fig. 3 shows the time dependent curve of cement mortar viscosity adopting the cement specimen of heater and the time dependent curve of cement mortar viscosity not adopting the cement specimen of heater.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
10, casing; 11, rectangular structure; 12, Men Ti; 20, microwave generator; 21, magnetron; 22, waveguide; 30, infrared temperature sensor; 40, controller; 50, ripple device is stirred; 60, test specimen holding box; 61, base plate; 62, side plate.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
The heater that the auxiliary cement specimen that Fig. 1 shows the present embodiment solidifies, this heater comprises casing 10, microwave generator 20 and infrared temperature sensor 30.Wherein, casing 10 is for holding cement specimen.Microwave generator 20 is arranged in casing 10, for generation of microwave.Infrared temperature sensor 30 is arranged in casing 10, for testing the temperature of cement specimen.
During use, cement specimen is placed in casing 10, opens microwave generator and produce microwave.Cement mortar in usual cement specimen is formed, and does rambling motion by many one end positively charged, the electronegative dipole of the other end, and arranged unordered.In the electric field after pressurization, inner dipole will rearrange, and become and will have certain direction regularly arranged, under microwave action, repeatedly polarize, and make cement mortar inside produce similar friction, temperature raises, and in cement mortar, moisture heats up.Like this, just contribute to the moisture evaporation in cement specimen, accelerate test specimen and solidify, reduce the Hou Ning time, accelerate test progress.
It should be noted that, heating using microwave is different from traditional mode of heating, does not only need heat transfer medium, nor needs the process of heat trnasfer, convection current and radiation.Because microwave only has heat effect to the part of moisture content, therefore in the process using microwave to heat cement specimen, if test specimen outside has waited to have coagulated just no longer absorb microwave, microwave can make the non-solidified water mud in cement specimen inside continue to add thermocoagulation because of its strong penetrating power, finally reaches the object that the acceleration time solidifies.And because this heater is to heating the with strong points of position, the effect of energy-conserving and environment-protective can be played.
In use microwave heating process, and not moisture boiling, only need the intermittent microwave that uses water temperature to be remained near 75 degrees Celsius.Infrared temperature sensor 30 can accurately detect the temperature of cement specimen, avoids cement specimen heat up too fast and explode.
As shown in Figure 3, the heater of the present embodiment also comprises controller 40, and this controller 40 is for controlling the break-make of microwave generator 20.The setting of controller 40, is convenient to experimenter and operates heater.Optionally, controller 40 also for receiving the temperature signal of infrared temperature sensor 30, and controls the break-make of microwave generator 20 according to temperature signal.Infrared temperature sensor 30 is collected the temperature of cement specimen and is fed back to controller 40 place, and when a certain threshold value of record during the temperature of cement specimen is higher than controller 40, controller 40 cuts off the power supply of microwave generator 20; When certain threshold value a certain of record during the temperature of cement specimen is lower than controller 40, microwave generator 20 restarted by controller 40.
As shown in Figure 1, in the present embodiment, heater also comprises and stirs ripple device 50, stirring ripple device 50 and is arranged in casing 10, for changing micro-direction of wave travel, making microwave more even for the heating of cement specimen.
Optionally, in the present embodiment, heater also comprises test specimen holding box 60, multiple side plates 62 that test specimen holding box 60 comprises base plate 61 and is arranged on base plate 61, and multiple side plate 62 and base plate 61 besieged city have the box body of opening surface.In the present embodiment, test specimen holding box 60 comprises a rectangle base plate 61 and four rectangular side plates 62, and base plate 61 and side plate 62 are made by pottery, and the bolt made by unorganic glass between base plate 61 and side plate 62 is connected.
As shown in Figure 1, in the present embodiment, infrared temperature sensor 30 is arranged on test specimen holding box 60.Be convenient to the temperature that infrared temperature sensor 30 records cement specimen in test specimen holding box 60 more accurately like this.
As shown in Figure 1, in the present embodiment, casing 10 comprises the rectangular structure 11 with opening surface and the door body 12 being arranged on opening surface place, the shape of door body 12 and the shape of opening surface suitable.Optionally, rectangular structure 11 and the door body 12 with opening surface are made by electromagnetic shielding material, can effectively prevent microwave leakage from producing harm to human body like this.Optionally, door body 12 is pivotally connected in opening surface place.
As shown in Figure 1, in the present embodiment, microwave generator 20 comprises magnetron 21 and waveguide 22.Magnetron 21 is for generation of microwave, and waveguide 22 is for transmitting the microwave of magnetron 21 generation.
As shown in Figure 2, the present embodiment additionally provides the heating means that a kind of auxiliary cement specimen solidifies, and comprising: heat cement specimen with microwave, while heating, carry out temperature survey to cement specimen.If the temperature of cement specimen suspends heating more than during the first predetermined value, when the temperature of cement specimen continues heating lower than during the second predetermined value, until cement specimen solidifies completely.Apply this heating means, under microwave action, repeatedly polarize, make cement mortar inside produce similar friction, temperature raises, and in cement mortar, moisture heats up.Like this, just contribute to the moisture evaporation in cement specimen, accelerate test specimen and solidify, reduce the Hou Ning time, accelerate test progress.Meanwhile, enforcement monitoring temperature is carried out to cement specimen, avoid cement specimen temperature too high and explode, ensure that experiment can normally be carried out, also avoid dangerous generation.
Under by experiment data the effect of microwave insulation to cement mortar accelerated solidification is described:
1, cement-slurry method: 600g concrete grey+300g water+18g anhydrous calcium chloride;
The temperature of 2, testing and pressure condition: 16 DEG C, 1atm, cement slurry density: 1.78g/cm
3;
3, the temperature after microwave constent temperature and pressure condition: 75 DEG C, 1atm;
4, measure cement consistency Changing Pattern in time by oil-well cement normal pressure multiviscosity meter, experimental result is as follows:
Experimental result is as follows:
When not opening microwave constent temperature function: the temperature of experiment and pressure condition: 16 DEG C, 1atm
| Time (min) | 0 | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 47 |
| Denseness (BC) | 1.7 | 2.5 | 3.5 | 4.1 | 4.4 | 5.3 | 5.7 | 7.2 | 9.1 | 13.5 | 15.2 |
After opening microwave constent temperature function: the temperature of experiment and pressure condition: 75 DEG C, 1atm
| Time (min) | 0 | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 47 |
| Denseness (BC) | 1.7 | 4.1 | 7.3 | 9.2 | 9.9 | 12.1 | 13.7 | 18.6 | 25.0 | 38.7 | 50 |
Fig. 3 shows the time dependent curve of cement mortar viscosity of the cement specimen do not opened under microwave constent temperature state, and to open under microwave constent temperature state the time dependent curve of cement mortar viscosity of cement specimen.Can significantly find, the heater that the auxiliary cement specimen that have employed the present embodiment solidifies contributes to the moisture evaporation in cement specimen, accelerates solidifying of cement specimen, reduces the Hou Ning time, be conducive to carrying out fast of experiment.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the heater that solidifies of auxiliary cement specimen, is characterized in that, comprising:
Casing (10), for holding cement specimen;
Microwave generator (20), is arranged in described casing (10), for generation of microwave;
Infrared temperature sensor (30), is arranged in described casing (10), for testing the temperature of described cement specimen.
2. heater according to claim 1, is characterized in that, described heater also comprises:
Controller (40), described controller (40) is for controlling the break-make of described microwave generator (20).
3. heater according to claim 2, it is characterized in that, described controller (40) also for receiving the temperature signal of described infrared temperature sensor (30), and controls the break-make of described microwave generator (20) according to described temperature signal.
4. heater according to claim 1, is characterized in that, described heater also comprises:
Stir ripple device (50), described in stir ripple device (50) and be arranged in described casing (10), for changing described micro-direction of wave travel.
5. heater according to claim 1, is characterized in that, described heater also comprises:
Test specimen holding box (60), described test specimen holding box (60) comprises base plate (61) and is arranged on the multiple side plates (62) on described base plate (61), and described multiple side plate (62) and described base plate (61) besieged city have the box body of opening surface.
6. heater according to claim 5, is characterized in that, described infrared temperature sensor (30) is arranged on described test specimen holding box (60).
7. heater according to claim 1, it is characterized in that, described casing (10) comprises the rectangular structure (11) with opening surface and the door body (12) being arranged on described opening surface place, the shape of described door body (12) and the shape of described opening surface suitable.
8. heater according to claim 7, is characterized in that, described door body (12) is pivotally connected in described opening surface place.
9. heater according to claim 1, is characterized in that, described microwave generator (20) comprising:
Magnetron (21), for generation of microwave;
Waveguide (22), for transmitting the microwave that described magnetron (21) produces.
10. auxiliary cement specimen heating means of solidifying, is characterized in that, comprise
With microwave, cement specimen is heated;
While heating, temperature survey is carried out to described cement specimen;
When the temperature of described cement specimen is more than the first predetermined value, suspend heating;
When the temperature of described cement specimen is lower than the second predetermined value, continue heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510604909.2A CN105196409B (en) | 2015-09-21 | 2015-09-21 | Assist the heating device and heating means of cement specimen solidification |
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| CN201510604909.2A CN105196409B (en) | 2015-09-21 | 2015-09-21 | Assist the heating device and heating means of cement specimen solidification |
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| CN105196409A true CN105196409A (en) | 2015-12-30 |
| CN105196409B CN105196409B (en) | 2018-09-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108931445A (en) * | 2018-06-25 | 2018-12-04 | 中南大学 | Rock dynamic mechanical property experimental provision under a kind of microwave radiation |
| CN110281367A (en) * | 2019-07-26 | 2019-09-27 | 衡水积土科技有限公司 | A kind of concrete curing device and method |
| CN111912871A (en) * | 2020-06-11 | 2020-11-10 | 西安理工大学 | Microwave-assisted rock breaking irradiation test device and test method thereof |
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| JPH06191966A (en) * | 1991-08-30 | 1994-07-12 | Zenkoku Nama Concrete Kogyo Kumiai Rengokai | Production of specimen |
| CN201158094Y (en) * | 2008-02-04 | 2008-12-03 | 淮海工学院 | Steam-pressure maintaining device |
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| CN204314124U (en) * | 2015-01-15 | 2015-05-06 | 中国石油大学(北京) | A kind of true triaxial hydraulic fracturing experiments constant temperature cement test piece mould |
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2015
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH03295607A (en) * | 1990-04-16 | 1991-12-26 | Nippon Steel Corp | Method and apparatus for curing cement product |
| JPH06191966A (en) * | 1991-08-30 | 1994-07-12 | Zenkoku Nama Concrete Kogyo Kumiai Rengokai | Production of specimen |
| CN201158094Y (en) * | 2008-02-04 | 2008-12-03 | 淮海工学院 | Steam-pressure maintaining device |
| CN101726165A (en) * | 2008-10-29 | 2010-06-09 | 机械科学研究总院先进制造技术研究中心 | Device for drying fabric and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108931445A (en) * | 2018-06-25 | 2018-12-04 | 中南大学 | Rock dynamic mechanical property experimental provision under a kind of microwave radiation |
| CN110281367A (en) * | 2019-07-26 | 2019-09-27 | 衡水积土科技有限公司 | A kind of concrete curing device and method |
| CN111912871A (en) * | 2020-06-11 | 2020-11-10 | 西安理工大学 | Microwave-assisted rock breaking irradiation test device and test method thereof |
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| CN105196409B (en) | 2018-09-18 |
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