CN108789799B - Intelligent curing control equipment for concrete structure and concrete curing method thereof - Google Patents
Intelligent curing control equipment for concrete structure and concrete curing method thereof Download PDFInfo
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- CN108789799B CN108789799B CN201810669037.1A CN201810669037A CN108789799B CN 108789799 B CN108789799 B CN 108789799B CN 201810669037 A CN201810669037 A CN 201810669037A CN 108789799 B CN108789799 B CN 108789799B
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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
- B28B11/245—Curing concrete articles
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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
- B28B11/247—Controlling the humidity during curing, setting or hardening
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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
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/0063—Control arrangements
- B28B17/0081—Process control
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- Mechanical Engineering (AREA)
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- Automation & Control Theory (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses intelligent health-preserving control equipment for a concrete structure, which comprises a health-preserving control device, and a test block concrete strength detection device, an intelligent health-preserving device and an environment monitoring device which are electrically connected with the health-preserving control device, wherein the intelligent health-preserving device comprises a water tank with a heating function, and a hot steam output pipe, a normal-temperature cold water output pipe and a test block health-preserving water pipe which are communicated with the water tank; the test block concrete strength detection device is used for monitoring the strength of the concrete test block and feeding the strength back to the curing control device so as to control curing parameters, and the test block curing water pipe is used for spraying and curing the concrete test block and the concrete to be cured under the same condition; the environment monitoring device comprises a temperature detection device and a humidity detection device. The intelligent concrete structure health-preserving control equipment and the concrete health-preserving method thereof ensure the health-preserving quality of concrete.
Description
Technical Field
The invention relates to the technical field of concrete curing equipment, in particular to intelligent curing control equipment for a concrete structure and a concrete curing method thereof.
Background
With the rapid development of economy in China, civil construction projects such as expressways, municipal buildings and the like all enter the period of high-speed development. In the construction process, the strength and other properties of the concrete do not meet the requirements of a stable state and design after the concrete is poured, at the moment, the concrete needs to be reasonably processed, so that the strength of the concrete meets the design requirements and has good properties, and the maintenance of the concrete is very important.
The concrete curing refers to the process of reasonably controlling the temperature and humidity of the concrete in the process of setting and hardening after the concrete is poured, so that the normal hydration of the cementing material in the concrete is ensured, and the concrete reaches certain strength and has good performance. Reasonable in-place health preservation can produce good quality effects: 1. concrete cracks are reduced; 2. the safety of the concrete structure is ensured; 3. the capability of the concrete structure for resisting various factors in the environment and keeping the normal use efficacy is improved; 4. the quality of the finished product of the large-volume concrete construction is improved.
At most of the current engineering construction sites, the adopted concrete curing method is that an operator manually sprinkles water and covers geotextile, and steam is generated by burning a boiler under a low temperature condition for curing. The curing method is limited by human control factors, and the curing quality of the concrete cannot be ensured due to the difference of business qualities of construction operators.
Disclosure of Invention
The invention mainly aims to provide intelligent curing control equipment for a concrete structure and a concrete curing method thereof, and aims to ensure the curing quality of concrete.
In order to achieve the purpose, the invention provides intelligent health-preserving control equipment for a concrete structure, which comprises a health-preserving control device, and a test block concrete strength detection device, an intelligent health-preserving device and an environment monitoring device which are electrically connected with the health-preserving control device, wherein,
the intelligent health preserving device comprises a water tank with a heating function, and a hot steam output pipe, a normal-temperature cold water output pipe and a test block health preserving water pipe which are communicated with the water tank;
the test block concrete strength detection device is used for monitoring the strength of the concrete test block and feeding the strength back to the curing control device so as to control curing parameters, and the test block curing water pipe is used for spraying and curing the concrete test block and the concrete to be cured under the same condition;
the environment monitoring device comprises a temperature detection device and a humidity detection device.
Preferably, concrete structure thing intelligence health preserving controlgear still includes intelligent health preserving controlgear collection box, and this intelligence health preserving controlgear collection box is integrated with environmental monitoring device and health preserving controlling means.
Preferably, the intelligent health-preserving control equipment integration box is provided with a visual screen and used for inputting concrete curing parameter conditions to the health-preserving control device.
Preferably, test block concrete intensity detection device is including setting up the concrete intensity detection case in intelligent health preserving controlgear integrated box and for its automatic flexible drawer that is used for placing the test block that can pop out, the inside concrete intensity tester that is provided with of concrete intensity detection case.
Preferably, the automatic telescopic drawer is controlled by the health maintenance control device to automatically extend and retract relative to the concrete strength detection box.
Preferably, a concrete test block placing box for placing the test block is arranged in the automatic telescopic drawer.
Preferably, the water tank is provided with a water tank controller, a water tank temperature indicator, a temperature detection pipe and a water tank heating resistance wire which are electrically connected with the water tank controller, and the water tank controller is electrically connected with the health-preserving control device to receive health-preserving control signals sent by the health-preserving control device so as to control the heating power and the heating time of the water tank heating resistance wire.
Preferably, an atomizer is arranged on the hot steam output pipe, and the test block health preserving water pipe is communicated with the hot steam output pipe and the normal-temperature cold water output pipe through a three-way joint.
The invention further provides a concrete curing method based on the intelligent curing control equipment for the concrete structure, which comprises the following steps:
preparing a concrete test block and placing the concrete test block in a test block concrete strength detection device while pouring concrete;
after the health preserving controlling means acquires the temperature and humidity data that environmental monitoring device obtained, when the temperature is greater than preset temperature and air humidity is less than preset humidity, normal atmospheric temperature cold water spray mode is opened to intelligent health preserving device, and when the temperature was less than or equal to preset temperature, low temperature hot steam health preserving mode was opened to intelligent health preserving device, and the maintenance time is controlled according to the strength test testing result of concrete test block.
Preferably, when the curing time of the concrete test block is less than the preset number of days and the detection strength meets the design requirement, the curing control device controls to send an instruction to the intelligent curing device to continue curing until the pouring time reaches the preset number of days;
when the curing time of concrete test block reaches the preset number of days and the detection strength does not reach the design requirement, the automatic telescopic drawer pops up, continues the curing and detects the concrete strength once at the interval preset time, and ends the curing until the strength of concrete test block reaches the design requirement.
The intelligent health maintenance control equipment for the concrete structure provided by the invention has the following beneficial effects:
1. the control equipment is highly integrated, integrates receiving, monitoring, detecting and controlling, avoids detection deviation caused by artificial damage of a construction site, and has high control accuracy;
2. the control equipment has high automation degree, can automatically complete the whole health preserving process only by inputting relevant parameters such as pouring time, design strength and other conditions by technical personnel during concrete pouring, does not need human intervention, and greatly improves the health preserving effect compared with the traditional manual health preserving;
3. the control equipment is provided with the temperature and humidity monitoring probes, can monitor environmental changes in real time, automatically makes mode adjustment according to the environmental changes, does not need manual adjustment, and is automatically suitable for health maintenance control in various environments;
4. the control equipment is provided with a feedback mechanism, so that the curing time can be adjusted in time according to the concrete strength detection result, and the curing quality is ensured;
5. the intelligent degree is high, and this controlgear has integrateed the health preserving controlling means, can whole journey record analysis health preserving parameter to automatic health preserving report that generates after the health preserving, drawing the health preserving curve, the construction technical personnel of being convenient for master the concrete quality and change, be favorable to the management and control to concrete structure thing finished product quality.
Drawings
FIG. 1 is a schematic structural view of the intelligent health maintenance control equipment for a concrete structure when the intelligent health maintenance control equipment is placed on a continuous steel box girder;
fig. 2 is a schematic structural diagram of the intelligent health preserving control equipment for the concrete structure.
In the figure, (1) temperature and humidity monitoring probes; (2) an intelligent health-preserving control equipment integration box; (3) a health preserving control device; (4) the test block is a health preserving nozzle under the same condition; (5) a test block health preserving water pipe; (6) the drawer can be automatically stretched and contracted; (7) placing a concrete test block box; (8) a concrete strength tester; (9) a concrete strength detection box; (10) a test block hot steam health preserving conduit; (11) a three-way joint; (12) cooling water and preserving health of the test block at normal temperature; (13) connecting a cable; (14) a water tank temperature indicator; (15) a water tank controller; (16) a temperature detection tube; (17) a water tank heating resistance wire; (18) a water tank; (19) an atomizer; (20) a hot steam output pipe; (21) a water tank outlet pipe valve; (22) a cold water output pipe at normal temperature; (23) continuous steel box girders; (24) provided is a bridge pier.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1 and 2, in the preferred embodiment, an intelligent health-preserving control device for a concrete structure comprises a health-preserving control device 3 (a computer control device), and a test block concrete strength detection device, an intelligent health-preserving device and an environment monitoring device which are electrically connected with the health-preserving control device, wherein,
the intelligent health preserving device comprises a water tank 18 with a heating function, and a hot steam output pipe 20, a normal-temperature cold water output pipe 22 and a test block health preserving water pipe 5 which are communicated with the water tank 18;
the test block concrete strength detection device is used for monitoring the strength of the concrete test block and feeding the strength back to the curing control device 3 for controlling curing parameters, and the test block curing water pipe 5 is used for spraying and curing the concrete test block and the concrete to be cured under the same condition;
the environment monitoring device comprises a temperature detection device and a humidity detection device.
And a test block health preserving nozzle 4 with the same condition as the test block is arranged at the outlet of the test block health preserving water pipe 5. The outlet of the normal temperature cold water output pipe 22 is also provided with a water tank output pipe valve 21. In this embodiment, the environment monitoring device is a temperature and humidity monitoring probe 1. After the maintenance of completion concrete, draw the relational curve by temperature, humidity, maintenance mode, the concrete intensity of health preserving controlling means 3 according to real-time collection, the construction technical personnel management and control of being convenient for. The health-preserving control device 3 is used as a core for receiving control commands and performing data feedback processing, and sends change instructions in real time to start a change program. The environment monitoring device is used for monitoring the temperature and humidity conditions of the construction site environment in real time and providing a data basis for change adjustment for the health maintenance control device 3 according to the site environment. The test block concrete strength detection device is controlled and guided by the health maintenance control device 3 and is used for adjusting the water temperature of the water tank and outputting the form.
When in use, the intelligent health maintenance control equipment for the concrete structure object is to be placed at stable and reliable positions of concrete pouring sites such as a similar precast beam field, the top surface of a prestressed concrete continuous rigid frame box beam, a bearing platform and the like.
Specifically, this concrete structure thing intelligence health preserving controlgear still includes intelligent health preserving controlgear collection box 2, and this intelligent health preserving controlgear collection box 2 is integrated with environmental monitoring device and health preserving controlling means 3.
Further, the intelligent health-preserving control equipment integration box 2 is provided with a visual screen and is used for inputting concrete curing parameter conditions (such as concrete pouring time and concrete design strength) into the health-preserving control device 3.
The test block concrete strength detection device comprises a concrete strength detection box 9 arranged in the intelligent health-preserving control equipment integration box 2 and an automatic telescopic drawer 6 which can be ejected and used for placing test blocks, wherein a concrete strength tester 8 is arranged inside the concrete strength detection box 9. The automatic telescopic drawer 6 is controlled by the health-preserving control device 3 to be automatically telescopic relative to the concrete strength detection box 9. A concrete test block placing box 7 for placing test blocks is arranged in the automatic telescopic drawer 6.
Specifically, the water tank 18 is provided with a water tank controller 15, and a water tank temperature indicator 14, a temperature detection pipe 16 and a water tank heating resistance wire 17 which are electrically connected with the water tank controller 15, and the water tank controller 15 is electrically connected with the health preserving control device 3 to receive a health preserving control signal sent by the health preserving control device, so as to control the heating power and the heating time of the water tank heating resistance wire 17.
In addition, an atomizer 19 is arranged on the hot steam output pipe 20, and the test block health preserving water pipe 5 is communicated with the hot steam output pipe 20 and the normal temperature cold water output pipe 22 through a three-way joint 11.
When the temperature is higher than 5 ℃ and the air humidity is lower than 80%, the environment monitoring device transmits the parameter to the health preserving control device 3, and the health preserving control device 3 starts a normal-temperature cold water spraying mode; when the temperature is lower than 5 ℃, construction is carried out under the low-temperature condition, the environment monitoring device transmits the parameters to the health-preserving control device 3, and the low-temperature steam health-preserving mode is started.
The health preserving control device 3 sends out an instruction to control the water tank controller 15 which can heat and atomize to work. When the water tank controller 15 receives an instruction of starting the normal-temperature cold water spraying mode, the water tank heating resistance wire 17 does not work, the water tank controller 15 controls the normal-temperature cold water output pipe 22 to open the valve, the pipeline supplies water to the spraying system, and the concrete spraying health preserving is started. When the water tank controller 15 receives an instruction for starting the low-temperature thermal steam curing mode, the water tank heating resistance wire 17 starts to work to heat cold water in the water tank 18, after the temperature detection pipe 16 detects that the water temperature meets the requirement, a signal is transmitted to the water tank controller 15, the water tank controller 15 controls the atomizer 19 to work, atomized thermal steam is output through the thermal steam output pipe 20, and steam curing is started under the low-temperature condition.
The test block concrete strength detection device has the following working process: prepare the test block when concrete placement, automatic flexible drawer 6 pops out, places the concrete test block on the test block of automatic flexible drawer 6 places the box, carries out the maintenance of spraying under the same condition to the test block by setting up the equal conditional health preserving shower nozzle 4 of test block above it. After concrete is poured for 3 days, the automatic telescopic drawer 6 is controlled by the health-preserving control device 3 to retract into the box, the concrete strength tester 8 is used for detecting the strength of the test block and feeding back the detection result to the health-preserving control device 3, after the strength tester finishes detection, the automatic telescopic drawer 6 is popped up, the curing under the same condition is continued, and the detection is repeated once every 12 hours.
When the curing time is less than 7 days but the detection strength meets the design requirement, in order to ensure the quality of the concrete, the curing control device 3 sends an instruction to the heatable and atomization functional water tank controller 15 to continue curing until the pouring time reaches 7 days, the curing control device 3 sends an instruction to the heatable and atomization functional water tank controller 15 to stop working, and the curing is finished. When the pouring time reaches 7 days, and the detection strength does not reach the design requirement, the automatic telescopic drawer 6 pops up, the step is repeated to continue the curing, the concrete strength is detected every 12 hours, the curing is finished until the concrete strength reaches the design requirement, and the change relation of the concrete strength is recorded by the computer, so that the later-stage analysis by technicians is facilitated.
The concrete structure thing intelligence health preserving controlgear that this embodiment provided has following beneficial effect:
1. the control equipment is highly integrated, integrates receiving, monitoring, detecting and controlling, avoids detection deviation caused by artificial damage of a construction site, and has high control accuracy;
2. the control equipment has high automation degree, can automatically complete the whole health preserving process only by inputting relevant parameters such as pouring time, design strength and other conditions by technical personnel during concrete pouring, does not need human intervention, and greatly improves the health preserving effect compared with the traditional manual health preserving;
3. the control equipment is provided with the temperature and humidity monitoring probes, can monitor environmental changes in real time, automatically makes mode adjustment according to the environmental changes, does not need manual adjustment, and is automatically suitable for health maintenance control in various environments;
4. the control equipment is provided with a feedback mechanism, so that the curing time can be adjusted in time according to the concrete strength detection result, and the curing quality is ensured;
5. the intelligent degree is high, and this controlgear has integrateed health preserving controlling means 3, can whole journey record analysis health preserving parameter to automatic health preserving report that generates after the health preserving, drawing the health preserving curve, the construction technical personnel of being convenient for master the concrete quality and change, be favorable to the management and control to concrete structure thing finished product quality.
The invention provides a concrete curing method of intelligent curing control equipment for a concrete structure.
Referring to fig. 1 and 2, in the preferred embodiment, a concrete curing method based on the intelligent curing control device for a concrete structure includes the following steps:
preparing a concrete test block and placing the concrete test block in a test block concrete strength detection device while pouring concrete;
after health preserving controlling means 3 acquires the temperature and humidity data that environmental monitoring device obtained, when the temperature is greater than preset temperature and air humidity is less than when presetting humidity, normal atmospheric temperature cold water spray mode is opened to intelligent health preserving device, and when the temperature was less than or equal to preset temperature, low temperature hot steam health preserving mode was opened to intelligent health preserving device, and the maintenance time is controlled according to the strength test testing result of concrete test block.
If can set up: when the temperature is higher than 5 ℃ and the air humidity is lower than 80%, the environment monitoring device transmits the parameter to the health preserving control device 3, and the health preserving control device 3 starts a normal-temperature cold water spraying mode; when the temperature is lower than 5 ℃, construction is carried out under the low-temperature condition, the environment monitoring device transmits the parameters to the health-preserving control device 3, and the low-temperature steam health-preserving mode is started.
Specifically, when the curing time of the concrete test block is less than the preset number of days and the detection strength meets the design requirement, the curing control device 3 controls to send an instruction to the intelligent curing device to continue curing until the pouring time reaches the preset number of days;
when the curing time of concrete test block reaches the preset number of days and the detection strength does not reach the design requirement, the automatic telescopic drawer 6 pops up, continues the curing and detects the concrete strength once at the interval preset time, and ends the curing until the strength of concrete test block reaches the design requirement.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are intended to be covered by the scope of the present invention.
Claims (7)
1. An intelligent health-preserving control device for a concrete structure, which is characterized by comprising a health-preserving control device, and a test block concrete strength detection device, an intelligent health-preserving device and an environment monitoring device which are electrically connected with the health-preserving control device, wherein,
the intelligent health preserving device comprises a water tank with a heating function, and a hot steam output pipe, a normal-temperature cold water output pipe and a test block health preserving water pipe which are communicated with the water tank;
the test block concrete strength detection device is used for monitoring the strength of the concrete test block and feeding the strength back to the curing control device so as to control curing parameters, and the test block curing water pipe is used for spraying and curing the concrete test block and the concrete to be cured under the same condition;
the environment monitoring device comprises a temperature detection device and a humidity detection device;
the intelligent health-preserving control equipment for the concrete structure further comprises an intelligent health-preserving control equipment integration box, and the intelligent health-preserving control equipment integration box is integrated with an environment monitoring device and a health-preserving control device;
the intelligent health-preserving control equipment integration box is provided with a visual screen and is used for inputting concrete curing parameter conditions to the health-preserving control device;
the test block concrete strength detection device comprises a concrete strength detection box arranged in the intelligent health-preserving control equipment integration box and an automatic telescopic drawer which can be ejected and used for placing test blocks, and a concrete strength tester is arranged inside the concrete strength detection box.
2. The intelligent health maintenance control equipment for the concrete structure according to claim 1, wherein the automatic telescopic drawer is controlled by the health maintenance control device to automatically telescope relative to the concrete strength detection box.
3. The intelligent health maintenance control equipment for the concrete structure as claimed in claim 1, wherein a concrete test block placing box for placing the test block is arranged in the automatic telescopic drawer.
4. The intelligent health maintenance control equipment for the concrete structure as claimed in claim 1, wherein the water tank is provided with a water tank controller, and a water tank temperature indicator, a temperature detection tube and a water tank heating resistance wire which are electrically connected with the water tank controller, and the water tank controller is electrically connected with the health maintenance control device to receive the health maintenance control signal sent by the health maintenance control device so as to control the heating power and the heating time of the water tank heating resistance wire.
5. The intelligent health-preserving control equipment for the concrete structure as claimed in claim 1, wherein the hot steam output pipe is provided with an atomizer, and the test block health-preserving water pipe is communicated with the hot steam output pipe and the normal temperature cold water output pipe through a three-way joint.
6. A concrete curing method based on the intelligent curing control device for the concrete structure according to any one of claims 1 to 5, characterized by comprising the following steps:
preparing a concrete test block and placing the concrete test block in a test block concrete strength detection device while pouring concrete;
after the health preserving controlling means acquires the temperature and humidity data that environmental monitoring device obtained, when the temperature is greater than preset temperature and air humidity is less than preset humidity, normal atmospheric temperature cold water spray mode is opened to intelligent health preserving device, and when the temperature was less than or equal to preset temperature, low temperature hot steam health preserving mode was opened to intelligent health preserving device, and the maintenance time is controlled according to the strength test testing result of concrete test block.
7. The concrete curing method of the intelligent curing control equipment for the concrete structure according to claim 6, wherein when the curing time of the concrete test block is less than the preset number of days and the detected strength meets the design requirement, the curing control device controls to send an instruction to the intelligent curing device to continue curing until the pouring time reaches the preset number of days;
when the curing time of concrete test block reaches the preset number of days and the detection strength does not reach the design requirement, the automatic telescopic drawer pops up, continues the curing and detects the concrete strength once at the interval preset time, and ends the curing until the strength of concrete test block reaches the design requirement.
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| CN110766115A (en) * | 2019-10-30 | 2020-02-07 | 中国一冶集团有限公司 | Bridge coagulation intelligent health preserving and temperature controlling system and method based on BIM model |
| CN112025949B (en) * | 2020-08-07 | 2021-11-30 | 乳源瑶族自治县嘉旺商品混凝土搅拌有限公司 | Concrete quick drying equipment |
| CN113290678A (en) * | 2021-05-28 | 2021-08-24 | 中国建筑土木建设有限公司 | Intelligent spraying maintenance control method, device, equipment and medium |
| CN116117978B (en) * | 2023-03-09 | 2024-02-13 | 保利长大工程有限公司 | Intelligent curing method for concrete prefabricated parts |
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| CN101692275A (en) * | 2009-10-21 | 2010-04-07 | 周巍 | Management and control integrated system and method for detecting strength of cement concretes |
| CN205009376U (en) * | 2015-07-16 | 2016-02-03 | 浙江索纳塔建筑材料有限公司 | Concrete block's intelligent steam maintenance system |
| CN105439634B (en) * | 2015-11-25 | 2018-06-22 | 湖南聚创建筑科技有限公司 | Cement concrete steam curing intelligent control method and its control device |
| CN206609735U (en) * | 2017-01-17 | 2017-11-03 | 葛洲坝集团试验检测有限公司 | A kind of concrete on construction site hardenability real-time feedback system |
| CN207402971U (en) * | 2017-11-13 | 2018-05-25 | 甘肃有色冶金职业技术学院 | A kind of concrete component tracking curing device |
| CN108196038B (en) * | 2017-12-21 | 2022-11-08 | 中国水利水电科学研究院 | Testing device and method for on-site mechanical parameters of concrete under actual curing condition |
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