CN203203990U - Testing device for cement setting time under high-temperature condition - Google Patents
Testing device for cement setting time under high-temperature condition Download PDFInfo
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- CN203203990U CN203203990U CN 201320007133 CN201320007133U CN203203990U CN 203203990 U CN203203990 U CN 203203990U CN 201320007133 CN201320007133 CN 201320007133 CN 201320007133 U CN201320007133 U CN 201320007133U CN 203203990 U CN203203990 U CN 203203990U
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Abstract
The utility model provides a testing device for cement setting time under a high-temperature condition. The testing device comprises a heating container (1), a heating piece (2), a water circulating opening (3), a protection sleeve (4), a vicat apparatus (5), a temperature controller (6), a water level overflowing opening (7), a temperature sensor (8) and a sample testing platform (9), wherein the heating container is internally configured with the sample testing platform, the vicat apparatus and the protection sleeve; the inner wall of the heating container is respectively provided with a plurality of water circulating openings and water level overflowing openings; the lower parts of the water circulating openings are provided with a plurality of heating elements and the upper parts of the water circulating openings are provided with a plurality of temperature sensors; the heating pieces and the temperature sensors are respectively fixed on the inner wall of the heating container; a plurality of the heating elements and a plurality of the temperature sensors are respectively coupled with the temperature controller through lead wires; and a nominal diameter of an inner thread of an upper sleeve (4.3) is equal to a nominal diameter of an inner thread of a lower sleeve (4.1). The testing device disclosed by the utility model has the characteristics of accurate temperature control, simplicity in operation, accurate testing result and low cost.
Description
Technical field
The utility model belongs to the cement setting time technical field of measurement and test, refer more particularly to a kind of under hot conditions the proving installation of cement setting time.
Background technology
Cement setting time is influence factor very important in the civil engineering process, because cement setting time directly affects construction speed, service life and long durability.Cement setting time is particularly crucial for the construction of sprayed concrete, because sprayed concrete usually needs concrete to be ejected on the workplaces such as the facade in tunnel and end face by spraying machine, under the effect of gravity, the concrete that is ejected on the workplace has the trend of peeling off mutually with basic unit, therefore require sprayed concrete to have very fast rate of setting, for accelerating the rate of setting of sprayed concrete, usual way is to add a certain amount of accelerating chemicals in concrete preparation process.Qualified accelerating chemicals should be able to make the presetting period of reference cement control in 3 ~ 5 minutes, and final setting time was controlled in 8 ~ 12 minutes.
Except accelerating chemicals, the temperature and humidity of environment and tunnel front also can influence the setting time of sprayed concrete.Since the 60's of 20th century, the tunnel of building under complex geological condition is more and more, in the engineering common problem be the workplace of institute's tunneling the very big or phreatic influence of high temperature has higher temperature owing to buried depth, this phenomenon is commonly referred to high ground temperature problem.Oneself is Tunnel Engineering, mining engineering and the common geological problem of other underground works for high ground temperature problem.High ground temperature can make the temperature of workplace surpass 40 ℃ usually, as China under construction draw a day railway tunnel, reach as high as the Gaoligong Shan Mountain tunnels that 80 ℃ as China plan to build.
The conventionally test method of cement setting time is at ambient temperature, carry out according to GB/T1346-2011 " cement normal consistency water consumption, setting time, the stability method of inspection ", its tested object is the cement slurry according to the prepared one-tenth of cement normal consistency water consumption, employed testing apparatus is Vicat apparatus, its test philosophy is the process of condensing of cement that characterizes by the paracentesis depth in the cement slurry of the test point of Vicat apparatus, and draws initial set and the final setting time of cement.Usually along with the rising of the residing environment temperature of grout, the hydration reaction speed quickening of cement can make rate of setting accelerate, and shows as and shortens setting time; But too high ambient temperature also can have a negative impact to the rate of setting of cement, can make the moisture in the cement slurry be lost the performance of condensing by excessive vaporization as too high ambient temperature.Simultaneously, the accelerating chemicals of different qualities and the mechanism of action under the effect of ambient temperature, also is not quite similar to the influence of cement slurry condensation process.Also there are not at present cement that perfect theory can be used to definitely to calculate different cultivars and accelerating chemicals under different external temperature environment, to the influence of hydration rate and setting time.Therefore, in actual engineering, need investigate external temperature environment to the influence of cement slurry condensation process by the mode of experimental test usually.
The document overview of cement setting time is as shown in the table under the at present domestic relevant varying environment temperature.
As seen the temperature range of studying from the different documents of last table mainly is to investigate under the environmental baseline of room temperature about the relation of cement paste setting time and environment temperature, the highlyest also is no more than 50 ℃, and this has limited the integrity of conclusion (of pressure testing) greatly.
The patent No. is the measuring method that CN200510020769.0 discloses a kind of high temperature high pressure oil well cement paste coagulation instrument and setting time thereof, this patent has been abandoned traditional Vicat apparatus needle-inserted measuring method, utilize the kettle heating pressurization of sealing, by the temperature variations of computing machine and next automatic writing time of data acquisition system (DAS) and grout to be measured, determine first, final setting time according to its exothermic temperature situation of change.Its foothold height can realize cement slurry test setting time in the High Temperature High Pressure complex environment automatically, but its equipment cost height, complicated operation and measuring period is longer.
The patent No. is that CN201020645783.6 discloses a kind of temperature control mortar analyzer setting time, this patent has been used conventional Vicat apparatus formula method of testing, replace traditional round mould and glass plate with special temperature control pot, the electricity consumption hydrothermal solution provides hot environment to test, simple operation.But the subjects of this patent is mortar specimen, and sample is not carried out turn-over in the process of test.In addition, its temperature control method relies on the scale formula thermometer of temperature control pot heat-insulation layer external pasting to monitor, and realizes heating or insulation in the mode of hand switch heating wire, therefore can cause test block temperature monitoring and degree of stability to have deviation.
Summary of the invention
For addressing the above problem, the utility model designed a kind of under hot conditions the proving installation of cement setting time, this proving installation has that temperature control is accurate, simple to operate, test result is accurate and characteristics with low cost.
For achieving the above object, the utility model adopts following technical scheme:
A kind of under hot conditions the proving installation of cement setting time; comprise heating container; heat generating member; the water circulation port; protective sleeve; Vicat apparatus; temperature controller; the water level overflow vent; temperature sensor and test sample platform; configuration test sample platform in heating container; test sample platform next door configuration Vicat apparatus; configuration protection cover on the test sample platform; Vicat apparatus to coagulate the test point axis vertical mutually with the test sample platform; inwall in the heating container bottom disposes several water circulation ports; inwall on heating container top disposes the water level overflow vent; dispose several heat generating members in the bottom of water circulation port; dispose several temperature sensors on the top of water circulation port; several heat generating members and several temperature sensors are separately fixed on the heating container inwall, and several heat generating members and several temperature sensors are connected on the temperature controller by connecting wire respectively.
The heating power of above-mentioned several heat generating members can not be lower than 1000 watts.
The said temperature controller disposes the PID regulator, and the departure of temperature controller can not be above ± 0.2 ℃.
Above-mentioned protective sleeve comprises to be trapped, middle cover, goes up cover, lower seal, goes up O-ring seal and pad; during being screwed in by internal thread, the bottom of last cover overlaps on the external thread on top; between the mating surface of cover and middle cover, be fitted with O-ring seal; middle cover bottom is connected on the internal thread on the top of trapping by external thread rotary; between middle cover and the mating surface of trapping, be fitted with lower seal; lay pad in trapping, on overlap internal thread nominal diameter equal the to trap nominal diameter of internal thread.
Above-mentionedly trap, middle cover, go up cover and pad is made by stainless steel.
The height that above-mentioned water level overflow vent is located on the heating container inwall is as the criterion with the middle part of going up cover in the protective sleeve.
The height that above-mentioned water circulation port is located on the heating container inwall is as the criterion with the middle bottom of overlapping in the protective sleeve.
Owing to adopt technical scheme as mentioned above, the utility model produces following beneficial effect:
1, proving installation of the present utility model has that temperature control is accurate, simple to operate, test result is accurate and characteristics with low cost.
2, the nominal diameter that overlaps internal thread on equal the to trap nominal diameter of internal thread, when being enclosed within the tested cement slurry test block of upset in can guaranteeing like this with last cover with mutual butt joint the between trapping.
When 3, laying pad in trapping and can guarantee protective sleeve dismounting turn-over its trap can be by tested cement slurry test block damage.
Description of drawings
Fig. 1 is structural representation sketch of the present utility model.
Fig. 2 is the structural representation sketch of protective sleeve.
Among the above-mentioned figure: the 1-heating container, the 2-heat generating member, 3-water circulation port, the 4-protective sleeve, 4.1-traps; 4.2-middle cover, the last cover of 4.3-, 4.4-lower seal, the last O-ring seal of 4.5-, 4.6-pad; the 5-Vicat apparatus, 6-temperature controller, 7-water level overflow vent, 8-temperature sensor, 9-test sample platform.
Embodiment
The utility model be a kind of under hot conditions the proving installation of cement setting time.
The utility model comprises heating container 1, heat generating member 2, water circulation port 3, protective sleeve 4, Vicat apparatus 5, temperature controller 6, water level overflow vent 7, temperature sensor 8 and test sample platform 9.
In conjunction with Fig. 1; the utility model disposes test sample platform 9 in heating container 1; test sample platform 9 next doors configuration Vicat apparatus 5; configuration protection cover 4 on the test sample platform 9; the test point axis with fixed attention of Vicat apparatus 5 is vertical mutually with test sample platform 9, and the inwall in heating container 1 bottom disposes several water circulation ports 3, and the inwall on heating container 1 top disposes water level overflow vent 7; dispose several heat generating members 2 in the bottom of water circulation port 3, the heating power of several heat generating members 2 can not be lower than 1000 watts.
The utility model disposes several temperature sensors 8 on the top of water circulation port 3, several heat generating members 2 and several temperature sensors 8 are separately fixed on heating container 1 inwall, several heat generating members 2 and several temperature sensors 8 are connected on the temperature controller 6 by connecting wire respectively, temperature controller 6 disposes the PID regulator, and the departure of temperature controller 6 can not be above ± 0.2 ℃.
In conjunction with Fig. 2; protective sleeve 4 of the present utility model comprises traps 4.1; middle cover 4.2; last cover 4.3; lower seal 4.4; last O-ring seal 4.5 and pad 4.6; during being screwed in by internal thread, the bottom of last cover 4.3 overlaps on the external thread on 4.2 tops; between the mating surface of cover 4.3 and middle cover 4.2, be fitted with O-ring seal 4.5; middle cover 4.2 bottoms are connected on the internal thread on 4.1 tops of trapping by external thread rotary; the nominal diameter of last cover 4.3 internal threads equal the to trap nominal diameter of 4.1 internal threads, in can guaranteeing like this cover 4.2 when the tested cement slurry test block of upset with overlap 4.3 and mutual butt joint the between 4.1 of trapping.
The utility model is fitted with lower seal 4.4 between middle cover 4.2 and 4.1 the mating surface of trapping; during last O-ring seal 4.5 and lower seal 4.4 can be guaranteed cover 4.2 with trap 4.1 and the water proof effect that goes up cover 4.3; trap and lay pads 4.6 in 4.1, trapping when pad 4.6 can be guaranteed protective sleeve dismounting turn-over 4.1 can be by tested cement slurry test block damage.
Of the present utility modelly trap 4.1, middle cover 4.2, on overlap 4.3 and pad 4.6 be made by stainless steel, generally in middle cover 4.2, place tested cement slurry test block.
The height that water level overflow vent 7 of the present utility model is located on heating container 1 inwall is as the criterion with the middle part of going up cover 4.3 in the protective sleeve 4.
The height that water circulation port 3 of the present utility model is located on heating container 1 inwall is as the criterion with the bottom of cover 4.2 in the protective sleeve 4.
The working method of the utility model proving installation is as follows:
1, preliminary work: Vicat apparatus 5 is placed in the heating container 1, and the protective sleeve that assembles is placed on the test sample platform 9, in heating container 1, add heating medium to water level overflow vent 7 places, open temperature controller 6 described heating medium is heated to design temperature, described heating medium can be water or other fluid;
2, dress mould: prepare tested cement slurry test block according to standard-required, pre-warmed protective sleeve 4 is taken out in heating container 1, during tested cement slurry test block packed in the cover 4.2 and with scraper with tested cement slurry test block floating to the middle cover 4.2 plane, to trap 4.1 afterwards, middle cover 4.2 and go up cover 4.3 and connect and be protective sleeve 4, and then protective sleeve 4 placed on the test sample platform 9 in the heating container 1, wholely cross range request control and in 1 minute, finish;
3, zero point is indicated in the location: use the inwall bottom surface of the initial set test point touching protective sleeve of Vicat apparatus 5, as the location indication zero point of Vicat apparatus 5.
4, test initial set: also test with the initial set test point of Vicat apparatus 5 according to grout alcohol coagulation test standard, being settled down to 4.1 bottom surfaces, the 4 ± 1mm that traps with the initial set test point is the presetting period;
5, test block upset: took out protective sleeve 4 after the presetting period, test finished; with after 4.2 upsets of middle cover again with trap 4.1 and last cover 4.3 connect; then the protective sleeve 4 that assembles is put into heating container 1 again; this test switching process requires to finish in 20 seconds; because protective sleeve 4 has certain thickness and the running time is shorter, so the temperature loss of protective sleeve 4 is usually in 1 ℃.
6, test final set: according to grout alcohol coagulation test standard and utilize the final set pin of Vicat apparatus 5 to test, stay next point on the surface of tested cement slurry test block with the end of described final set test point but annular indentation do not occur as final setting time, this final setting time is the cement setting time under hot conditions.
Claims (7)
1. the proving installation of a cement setting time under hot conditions; comprise heating container (1); heat generating member (2); water circulation port (3); protective sleeve (4); Vicat apparatus (5); temperature controller (6); water level overflow vent (7); temperature sensor (8) and test sample platform (9); it is characterized in that: configuration test sample platform (9) in heating container (1); test sample platform (9) next door configuration Vicat apparatus (5); test sample platform (9) is gone up configuration protection cover (4); the test point axis with fixed attention of Vicat apparatus (5) is vertical mutually with test sample platform (9); inwall in heating container (1) bottom disposes several water circulation ports (3); inwall on heating container (1) top disposes water level overflow vent (7); dispose several heat generating members (2) in the bottom of water circulation port (3); dispose several temperature sensors (8) on the top of water circulation port (3); several heat generating members (2) and several temperature sensors (8) are separately fixed on the heating container inwall, and several heat generating members (2) and several temperature sensors (8) are connected on the temperature controller (6) by connecting wire respectively.
According to claim 1 described a kind of under hot conditions the proving installation of cement setting time, it is characterized in that: the heating power of several heat generating members (2) can not be lower than 1000 watts.
According to claim 1 described a kind of under hot conditions the proving installation of cement setting time, it is characterized in that: temperature controller (6) disposes the PID regulator, the departure of temperature controller (6) can not be above ± 0.2 ℃.
According to claim 1 described a kind of under hot conditions the proving installation of cement setting time; it is characterized in that: above-mentioned protective sleeve comprises trap (4.1); middle cover (4.2); last cover (4.3); lower seal (4.4); last O-ring seal (4.5) and pad (4.6); the bottom of last cover (4.3) is screwed on the external thread on middle cover (4.2) top by internal thread; between the mating surface of cover (4.3) and middle cover (4.2), be fitted with O-ring seal (4.5); middle cover (4.2) bottom is connected on by external thread rotary on the internal thread on (4.1) top of trapping; between the mating surface of middle cover (4.2) and trap (4.1), be fitted with lower seal (4.4); trap and lay pad (4.6) in (4.1), the last nominal diameter that overlaps (4.3) internal thread equal the to trap nominal diameter of (4.1) internal thread.
According to claim 4 described a kind of under hot conditions the proving installation of cement setting time, it is characterized in that: trap (4.1), middle cover (4.2), go up cover (4.3) and pad (4.6) is made by stainless steel.
According to claim 4 described a kind of under hot conditions the proving installation of cement setting time, it is characterized in that: the height that water level overflow vent (7) is located on heating container (1) inwall is as the criterion with the middle part of going up cover (4.3) in the protective sleeve (4).
According to claim 4 described a kind of under hot conditions the proving installation of cement setting time, it is characterized in that: the height that water circulation port (3) is located on heating container (1) inwall is as the criterion with the bottom of cover (4.2) in the protective sleeve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320007133 CN203203990U (en) | 2013-01-07 | 2013-01-07 | Testing device for cement setting time under high-temperature condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320007133 CN203203990U (en) | 2013-01-07 | 2013-01-07 | Testing device for cement setting time under high-temperature condition |
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| CN203203990U true CN203203990U (en) | 2013-09-18 |
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| CN 201320007133 Expired - Fee Related CN203203990U (en) | 2013-01-07 | 2013-01-07 | Testing device for cement setting time under high-temperature condition |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016019727A1 (en) * | 2014-08-04 | 2016-02-11 | 葛洲坝集团试验检测有限公司 | Device utilizing natural vibration frequency of cement-based material to detect setting time thereof |
| CN108548757A (en) * | 2018-05-31 | 2018-09-18 | 华中科技大学 | A kind of test method of continuous reinforced concrete pavement solidification temperature curve |
| CN111220796A (en) * | 2020-03-02 | 2020-06-02 | 中国三峡建设管理有限公司 | Automatic concrete setting time measuring device for simulating field environment and using method thereof |
-
2013
- 2013-01-07 CN CN 201320007133 patent/CN203203990U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016019727A1 (en) * | 2014-08-04 | 2016-02-11 | 葛洲坝集团试验检测有限公司 | Device utilizing natural vibration frequency of cement-based material to detect setting time thereof |
| CN108548757A (en) * | 2018-05-31 | 2018-09-18 | 华中科技大学 | A kind of test method of continuous reinforced concrete pavement solidification temperature curve |
| CN111220796A (en) * | 2020-03-02 | 2020-06-02 | 中国三峡建设管理有限公司 | Automatic concrete setting time measuring device for simulating field environment and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA RAILWAY TUNNEL GROUP TECHNOLOGY RESEARCH CO. Free format text: FORMER OWNER: ZHONGTIE TUNNEL GROUP CO., LTD. Effective date: 20140611 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140611 Address after: 471009 Luoyang City, the old town of Henan champion Red Road, No. 3 Patentee after: China Railway Tunnel Group Technology Research Co., Ltd. Address before: 471009 Henan city of Luoyang province old city zhuangyuanhong Road No. 3 in group Patentee before: Zhongtie Tunnel Group Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20200107 |
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| CF01 | Termination of patent right due to non-payment of annual fee |