Device for automatically detecting restricted expansion rate of mortar and use method

Abstract

The invention discloses a device for automatically detecting the limited expansion rate of mortar and a use method, and relates to the technical field of detection devices.The device comprises a test piece frame, a tested piece is arranged in the test piece frame, a high-precision contact type displacement sensor is arranged at the top of the test piece frame and arranged above the tested piece, and the high-precision contact type displacement sensor is connected with the tested piece. The test piece frame is arranged in the test piece box, and a drainage assembly is arranged at the lower part of the test piece box. According to the device for automatically detecting the restricted expansion rate of the mortar and the using method, the tested piece does not need to be manually loaded and unloaded for multiple times, and errors generated in the manual loading and unloading process are reduced; the data of the corresponding age of the test piece does not need to be manually measured, so that measurement errors in manual measurement engineering are reduced; according to the method, the data of the test piece in the corresponding age can be automatically collected, the linear expansion process of the tested piece can be observed, and the expansion condition and the corresponding rule of the tested piece can be observed for a long time under the condition that the tested piece is not touched manually.

Description

Technical Field

[0001] The invention relates to the technical field of detection devices, and in particular to a device for automatically detecting the limiting expansion rate of mortar and a use method thereof. Background Art

[0002] In the traditional process of testing the expansion agent's limited expansion rate, from removing the mold to measure the initial length, to measuring the length in water for 7 days, and then to measuring the length in air for 21 days, the entire experimental process requires repeated loading and unloading of the test piece, which is labor-intensive, inefficient, and affects the accuracy of the measurement. In addition, when testing the limited expansion rate in water for 7 days, the test piece needs to be taken out of the water to test its limited expansion rate, and this process will cause errors in the test data. Summary of the invention

[0003] The purpose of the present invention is to provide a device for automatically detecting the limited expansion rate of mortar and a method for using it, so as to solve the problem that the existing experimental process requires multiple manual loading and unloading of the tested pieces, which is labor-intensive, inefficient, affects the accuracy of measurement, and causes errors in the test data.

[0004] To achieve the above-mentioned purpose, the present invention provides a device for automatically detecting the limited expansion rate of mortar, including a specimen rack, a test piece is arranged inside the specimen rack, a high-precision contact displacement sensor is arranged on the top of the specimen rack, the high-precision contact displacement sensor is arranged above the test piece, the specimen rack is arranged in a specimen box, and a drainage assembly is arranged at the bottom of the specimen box.

[0005] Preferably, a drain port is provided at the bottom of the specimen rack, and a plurality of water holes are provided on the side wall of the specimen rack, wherein the diameter of the water holes is set to 10 mm.

[0006] Preferably, a water retaining cover is provided on one side of the top of the test piece box, and a through opening is provided on the other side.

[0007] Preferably, a support plate is obliquely arranged in the test box, an angle of 65° is formed between the support plate and the bottom of the test box, and the test rack is arranged on the support plate.

[0008] Preferably, the drainage assembly includes a drainage outlet opened at the bottom of the specimen box, a half-penetrating plate pagoda head straight through is provided in the drainage outlet, and a rubber protective sleeve is connected to the outer end of the half-penetrating plate pagoda head straight through.

[0009] Preferably, a probe 1 is provided on the top of the test piece, and the probe 1 is in contact with a probe 2 of the high-precision contact displacement sensor. The high-precision contact displacement sensor is connected to a data collector, and the data collector is also connected to a data receiver, and the data receiver is also connected to a data processing system.

[0010] A method for using a device for automatically detecting the limiting expansion rate of mortar comprises the following steps: Step S1, performing surface treatment on the probe 1 of the tested object and the surface of the tested object, and marking the test direction and number on the tested object; Step S2, placing the processed test piece on a test piece rack, and then placing the test piece rack on a support plate of a test piece box, installing a high-precision contact displacement sensor at the opening of the test piece rack, so that the probe 1 of the test piece is aligned with and in contact with the probe 2 of the high-precision contact displacement sensor; Step S3, turning on the data processing system, the data receiver and the data collector, the data collector collecting the initial readings on the high-precision contact displacement sensor, the data receiver receiving the data collected by the data collector and transmitting it to the data processing system for marking; Step S4, keep the tested piece in the test piece box and add curing water into the test piece box. The water temperature is 20℃±1℃ and the depth of the tested piece is not less than 10mm. The data collector collects data in real time at a frequency of half a day and transmits it to the data receiver. The data receiver transmits it to the data processing system for marking. Step S5, after the limited expansion rate in water age expires, the rubber protective cover is removed, and the drainage assembly starts to drain the curing water in the specimen box, and the limited expansion rate of the test piece exposed to the air is continuously tested in an environment of a temperature of 20°C ± 2°C and a humidity of 60% ± 5%; Step S6: Based on the collected marked node data, the data processing system calculates the final result of the marked node limit expansion rate.

[0011] Preferably, the embedded calculation formula of the data processing system is as follows: ; in, It represents the restricted expansion rate at the measured age, %; Indicates the reference length of the tested piece, mm; Indicates the initial length measurement value of the tested piece, mm; Indicates the length measurement value of the tested piece at the measured age, mm.

[0012] Therefore, the present invention adopts the above-mentioned device and method for automatically detecting the limited expansion rate of mortar, which eliminates the need for multiple manual loading and unloading of the test piece, thereby reducing the errors generated during the manual loading and unloading process; there is no need to manually measure the data of the corresponding age of the test piece, thereby reducing the measurement errors in the manual measurement project; this method can not only automatically collect the data of the corresponding age of the test piece, but also observe the linear process of the expansion of the test piece, thereby realizing long-term observation of the expansion condition and corresponding laws of the test piece without manually touching the test piece.

[0013] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment of a device for automatically detecting the limited expansion rate of mortar and a method for using the device according to the present invention; Figure 2 It is a front view of an embodiment of a device for automatically detecting the limited expansion rate of mortar and a method for using the device according to the present invention; Figure 3 It is a side view of an embodiment of a device for automatically detecting the limited expansion rate of mortar and a method for using the device according to the present invention; Figure numerals: 1. Specimen rack; 11. Drain outlet; 12. Water hole; 2. Test piece; 3. High-precision contact displacement sensor; 4. Specimen box; 41. Water retaining cover; 42. Through port; 5. Drainage assembly; 51. Half-through plate pagoda head straight through; 52. Rubber protective cover; 6. Support plate. DETAILED DESCRIPTION

[0015] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0016] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0017] Example See also Figure 1-3 The present invention provides a device for automatically detecting the limited expansion rate of mortar, comprising a test piece frame 1, the test piece frame 1 is made of stainless steel. A drainage port 11 is provided at the bottom of the test piece frame 1, and a plurality of water holes 12 are provided on the side wall of the test piece frame 1, and the diameter of the water holes 12 is set to 10 mm.

[0018] The test piece 2 is arranged inside the test piece rack 1, and a high-precision contact displacement sensor 3 is arranged on the top of the test piece rack 1, and the resolution of the high-precision contact displacement sensor 3 is 0.001mm. The high-precision contact displacement sensor 3 is arranged above the test piece 2, and the test piece rack 1 is arranged in the test piece box 4, and a drainage component 5 is arranged at the lower part of the test piece box 4. The drainage component 5 includes a drainage port opened at the bottom of the test piece box 4, and a half-penetrating plate pagoda head straight-through 51 is arranged in the drainage port, and a rubber protective cover 52 is connected to the outer end of the half-penetrating plate pagoda head straight-through 51. The drainage component 5 can also use an automatic drainage device. In this embodiment, the drainage component 5 is composed of the half-penetrating plate pagoda head straight-through 51 and the rubber protective cover 52.

[0019] A water retaining cover 41 is provided on one side of the top of the test box 4, and a through hole 42 is provided on the other side. A support plate 6 is provided obliquely in the test box 4, and an angle of 65° is formed between the support plate 6 and the bottom of the test box 4. The test rack 1 is provided on the support plate 6.

[0020] A probe 1 is arranged on the top of the tested piece 2, and the probe 1 contacts the probe 2 of the high-precision contact displacement sensor 3, and the high-precision contact displacement sensor 3 is connected to a data collector, and the data collector collects data at a frequency of half a day / time. The data collector is also connected to a data receiver, and the data receiver is also connected to a data processing system.

[0021] A method for using a device for automatically detecting the limiting expansion rate of mortar comprises the following steps: Step S1 , performing surface treatment on the probe 1 of the tested object 2 and the surface of the tested object 2 , including cleaning and leveling, and then marking the test direction and number on the tested object 2 .

[0022] Step S2, place the processed test piece 2 on the test piece holder 1, and then place the test piece holder 1 on the support plate 6 of the test piece box 4, install the high-precision contact displacement sensor 3 at the opening 42 of the test piece holder 1, so that the probe 1 of the test piece 2 is aligned with and in contact with the probe 2 of the high-precision contact displacement sensor 3.

[0023] Step S3, turn on the data processing system, the data receiver and the data collector, the data collector collects the initial readings on the high-precision contact displacement sensor 3, the data receiver receives the data collected by the data collector and transmits it to the data processing system for marking, and the marking points are: 7d, 14d, 28d, 56d, 84d.

[0024] Step S4, keep the test piece 2 in the test piece box 4, add curing water into the test piece box 4, the water temperature is 20℃±1℃, the depth of the test piece 2 is not less than 10mm, the data acquisition device collects data in real time at a frequency of half a day / time and transmits it to the data receiver, and the data receiver transmits it to the data processing system for marking.

[0025] Step S5, after the limited expansion rate in water expires, remove the rubber protective cover, and the drainage component 5 starts to drain the curing water in the specimen box 4, and continue to test the limited expansion rate of the test piece 2 exposed to the air in an environment with a temperature of 20°C ± 2°C and a humidity of 60% ± 5%.

[0026] Step S6: Based on the collected marked node data, the data processing system calculates the final result of the marked node limit expansion rate.

[0027] The embedded calculation formula of the data processing system is as follows: ; in, It represents the restricted expansion rate at the measured age, %; Indicates the reference length of the tested piece, mm; Indicates the initial length measurement value of the tested piece, mm; Indicates the length measurement value of the tested piece at the measured age, in mm. The system uses the average of two similar values ​​calculated as the measurement result of the limiting expansion rate at that age, and the calculation result is accurate to 0.001%.

[0028] Therefore, the present invention adopts the above-mentioned device and method for automatically detecting the limited expansion rate of mortar, which eliminates the need for multiple manual loading and unloading of the test piece, thereby reducing the errors generated during the manual loading and unloading process; there is no need to manually measure the data of the corresponding age of the test piece, thereby reducing the measurement errors in the manual measurement project; this method can not only automatically collect the data of the corresponding age of the test piece, but also observe the linear process of the expansion of the test piece, thereby realizing long-term observation of the expansion condition and corresponding laws of the test piece without manually touching the test piece.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A device for automatically detecting the limiting expansion rate of mortar, characterized in that: The invention comprises a specimen rack, wherein a test piece is arranged inside the specimen rack, a high-precision contact displacement sensor is arranged on the top of the specimen rack, and the high-precision contact displacement sensor is arranged above the test piece, the specimen rack is arranged in a specimen box, and a drainage component is arranged at the bottom of the specimen box.

2. The device for automatically detecting the limiting expansion rate of mortar according to claim 1 is characterized in that: A drainage port is provided at the bottom of the test specimen rack, and a plurality of water holes are provided on the side wall of the test specimen rack. The diameter of the water holes is set to 10 mm.

3. The device for automatically detecting the limiting expansion rate of mortar according to claim 2 is characterized in that: A water retaining cover is arranged on one side of the top of the test piece box, and a through opening is arranged on the other side.

4. The device for automatically detecting the limiting expansion rate of mortar according to claim 3 is characterized in that: A support plate is obliquely arranged in the test box, an angle of 65° is formed between the support plate and the bottom of the test box, and the test rack is arranged on the support plate.

5. The device for automatically detecting the limiting expansion rate of mortar according to claim 4 is characterized in that: The drainage component includes a drainage port opened at the bottom of the specimen box, a half-penetrating plate pagoda head straight through is arranged in the drainage port, and a rubber protective sleeve is connected to the outer end of the half-penetrating plate pagoda head straight through.

6. The device for automatically detecting the limiting expansion rate of mortar according to claim 5 is characterized in that: A probe 1 is arranged on the top of the tested piece, and the probe 1 is in contact with a probe 2 of the high-precision contact displacement sensor. The high-precision contact displacement sensor is connected to a data collector, and the data collector is also connected to a data receiver, and the data receiver is also connected to a data processing system.

7. A method for using the device for automatically detecting the limiting expansion rate of mortar according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step S1, performing surface treatment on the probe 1 of the tested object and the surface of the tested object, and marking the test direction and number on the tested object; Step S2, placing the processed test piece on a test piece rack, and then placing the test piece rack on a support plate of a test piece box, installing a high-precision contact displacement sensor at the opening of the test piece rack, so that the probe 1 of the test piece is aligned with and in contact with the probe 2 of the high-precision contact displacement sensor; Step S3, turning on the data processing system, the data receiver and the data collector, the data collector collecting the initial readings on the high-precision contact displacement sensor, the data receiver receiving the data collected by the data collector and transmitting it to the data processing system for marking; Step S4, keep the tested piece in the test piece box and add curing water into the test piece box. The water temperature is 20℃±1℃ and the depth of the tested piece is not less than 10mm. The data collector collects data in real time at a frequency of half a day and transmits it to the data receiver. The data receiver transmits it to the data processing system for marking. Step S5, after the limited expansion rate in water age expires, the rubber protective cover is removed, and the drainage assembly starts to drain the curing water in the specimen box, and the limited expansion rate of the test piece exposed to the air is continuously tested in an environment of a temperature of 20°C ± 2°C and a humidity of 60% ± 5%; Step S6: Based on the collected marked node data, the data processing system calculates the final result of the marked node limit expansion rate.

8. The method for using the device for automatically detecting the limiting expansion rate of mortar according to claim 7 is characterized in that: The embedded calculation formula of the data processing system is as follows: ； in, It represents the restricted expansion rate at the measured age, %; Indicates the reference length of the tested piece, mm; Indicates the initial length measurement value of the tested piece, mm; Indicates the length measurement value of the tested piece at the measured age, mm.

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