Automatic testing device for self-drying shrinkage of grouting material
By designing an automatic testing device for the self-drying shrinkage of grouting materials, and utilizing a sealed shell, telescopic components, and an intelligent humidification and air conditioning unit, the problem of data dispersion in the self-drying shrinkage test of grouting materials was solved, and efficient and accurate experimental results were achieved.
Patent Information
- Application Number
- CN202422910644.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-11-28
AI Technical Summary
The existing self-drying shrinkage test of grouting materials has problems such as discrete experimental data and poor test accuracy. This is mainly due to the poor sealing degree of the test block and the poor stability of human control, which leads to the low test accuracy of the current standard.
An automatic testing device for the self-drying shrinkage of grouting material was designed, comprising a sealed shell, a telescopic component, contact nail heads, a humidification unit, and an air conditioning unit, forming a sealed experimental chamber. The length of the test block is periodically obtained through multiple sets of contact nail heads, and the temperature and humidity are automatically adjusted in conjunction with a data acquisition and control system.
It simplifies the experimental operation process, reduces human error, improves experimental efficiency and accuracy, saves energy, and enhances the versatility and precision of the device.
Smart Images
Figure CN223770223U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building material testing instruments, specifically to an automatic testing device for the self-drying shrinkage of grouting materials. Background Technology
[0002] Self-drying shrinkage of grout refers to the phenomenon where the volume of grout gradually decreases during the hardening process due to the consumption and loss of internal moisture. This occurs because during the hydration reaction, cement and other binding materials react chemically with water. As hydration progresses, free water in the internal pores is consumed, reducing humidity. Simultaneously, moisture within the grout dissipates into the external environment, causing menisci in the capillaries. Under surface tension, the pore walls are subjected to pressure, leading to volume shrinkage of the grout. Self-drying shrinkage is a key quality and technical indicator for grout products and is determined according to the method specified in Appendix D of the current standard "Grouting for Reinforcing Steel Connections" JG / T 408-2019. However, the testing of self-drying shrinkage can be affected by factors such as the degree of sealing of the test specimen, complex procedures, the tester's technique, environmental stability control, and specimen movement, all of which can lead to data dispersion and poor test accuracy. Utility Model Content
[0003] To address the aforementioned shortcomings of existing technologies, an automatic testing device for self-drying shrinkage of grouting materials is provided, which simplifies the experimental operation process, reduces the experimental difficulty, and improves experimental efficiency and accuracy.
[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:
[0005] An automatic testing device for self-drying shrinkage of grouting material, characterized in that: it includes...
[0006] The sealed outer shell includes an experimental platform and a housing. The housing is fixedly installed on the experimental platform in a detachable connection manner, and the two together form a sealed experimental chamber.
[0007] The test platform has a test block placement area with telescopic components and contact nail heads. The contact nail heads are arranged in pairs, and several pairs of contact nail heads are distributed on both sides of the test block placement area. The contact nail heads are installed on the test platform through the telescopic components. Several demolding test blocks are placed in the test block placement area, and each pair of contact nail heads corresponds to one demolding test block. The contact nail heads are attached to the nail heads on both sides of the demolding test block.
[0008] Humidification and air conditioning units are set on the experimental platform; according to experimental requirements, the temperature and humidity of the experimental chamber are maintained within the temperature and humidity range set by the experimental standard.
[0009] According to the above technical solution, it includes three sets of contact nail heads, which are arranged at intervals along the test block placement area.
[0010] According to the above technical solution, it includes one, two, or four or more contact nail heads; all contact nail heads are arranged at intervals along the test block placement area.
[0011] According to the above technical solution, the telescopic component adopts an electric push rod and is driven by electric induction.
[0012] According to the above technical solution, the end face of the contact nail head is a vertically arranged plane, and the nail head in the demolding test block adopts a spherical structure; the contact nail head and the nail head in the demolding test block are in point contact.
[0013] According to the above technical solution, the humidity in the experimental chamber is controlled at 20% to 80%, and the temperature is controlled at 16℃ to 30℃.
[0014] According to the above technical solution, the humidification unit adopts an existing small intelligent humidifier, and the air conditioning unit adopts an existing small intelligent heating, cooling and dehumidifying air conditioner; the humidification unit and the air conditioning unit are integrated on the experimental platform, and both are equipped with humidity detection heads in the experimental chamber.
[0015] According to the above technical solution, the shell is a transparent shell; the experimental platform has a polygonal or arc-shaped planar dimension.
[0016] According to the above technical solution, an anti-slip grid is set in the test block placement area; and several marking lines are set in the test block placement area, with one marking line corresponding to each group of contact nail heads, and the marking line and the line connecting two contact nail heads in the same group are on the same straight line.
[0017] According to the above technical solution, it also includes a data acquisition and control system. The data acquisition and control system adopts an existing mature structure. All telescopic rod heads are connected to the data acquisition and control system through lead wires. According to the experimental specifications, the size data of the demolded test block is collected periodically, and the humidity and temperature in the experimental chamber are controlled to be maintained within the set range.
[0018] This utility model has the following beneficial effects:
[0019] 1. The experimental platform and shell constitute a sealed experimental chamber. Humidification and air conditioning units maintain the humidity and temperature within the chamber, keeping them within the required range according to experimental specifications. The length of the test block is periodically measured using multiple sets of contact nails within the chamber. The experimental duration described in this device is long, eliminating the need for personnel to measure the length of the test block at fixed times and locations.
[0020] Compared to previous experiments that involved wrapping the device with at least two layers of plastic film and an outer layer of aluminum foil, and then manually taking readings, the apparatus described in this scheme greatly saves testing time, reduces complicated operating procedures and human error for experimenters, and improves experimental efficiency. At the same time, it improves experimental accuracy and saves energy consumption caused by environmental control during maintenance.
[0021] 2. This design incorporates a variety of contact nail heads, not limited to the three groups specified in the experimental specifications. If subsequent experimental specifications are updated to require a larger number of test blocks for simultaneous testing, this device can also be used, thus enhancing its versatility.
[0022] 3. The use of intelligent humidifiers and air conditioners enables automatic adjustment of temperature and humidity within the experimental chamber, eliminating the need for frequent human intervention and reducing the workload of experiments.
[0023] 4. A transparent shell is used to facilitate observation of the test block's condition.
[0024] 5. Set up a data acquisition and control system that can collect data from test blocks at fixed times and locations according to the experimental plan, and calculate the results, thereby reducing the workload of experimental personnel.
[0025] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description
[0026] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.
[0027] Figure 1 This is a top view of an embodiment provided by this utility model (excluding the demolding test block);
[0028] Figure 2 This is a front sectional view (including the demolded test block) of an embodiment provided by this utility model;
[0029] In the diagram, 1 is the experimental platform; 2 is the shell; 3 is the telescopic component; 4 is the contact nail head; 5 is the test block placement area; 6 is the demolded test block; 7 is the humidification unit; 8 is the air conditioning unit; and 9 is the lead wire. Detailed Implementation
[0030] The following is in conjunction with the appendix Figure 1-2The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.
[0031] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0033] Reference Figures 1-2 As shown, this utility model provides an automatic testing device for the self-drying shrinkage of grouting materials.
[0034] Example 1
[0035] It includes a sealed outer shell, which comprises an experimental platform 1 and a housing 2. The housing is fixedly installed on the experimental platform in a detachable connection manner, and the two together form a sealed experimental chamber.
[0036] The telescopic component 3 and the contact nail head 4 are provided on the experimental platform, and a test block placement area 5 is provided. The contact nail heads are arranged in pairs, and several groups of contact nail heads are distributed on both sides of the test block placement area. The contact nail heads are installed on the experimental platform through the telescopic component. Several demolding test blocks 6 are placed in the test block placement area, and each group of contact nail heads corresponds to one demolding test block. The contact nail heads are attached to the nail heads on both sides of the demolding test block.
[0037] Humidification unit 7 and air conditioning unit 8 are set on the experimental platform; according to the experimental requirements, the temperature and humidity of the experimental chamber are maintained within the temperature and humidity range set by the experimental standard.
[0038] In this embodiment, a sealed experimental chamber is formed by the experimental platform and the housing. Before the experiment begins, the housing is removed from the experimental platform, and the demolded test blocks are placed sequentially into the test block placement area, with each demolded test block clamped by a corresponding set of contact nail heads. The contact nail heads and the nail heads inside the test block remain in contact without pressure, thus allowing the length of the test block to be measured. Subsequently, the housing is fixed back onto the experimental platform, allowing the test blocks to be placed into the sealed experimental chamber. During the experiment, the humidity and temperature within the experimental chamber are maintained within the required range according to the experimental specifications by the humidification and air conditioning units. Finally, the data of the stones are periodically tested according to the experimental specifications as the experiment progresses. The distance between the two contact nail heads is determined based on the extension length of the telescopic rod, thereby determining the length of the test block.
[0039] Compared to previous experiments that involved wrapping the device with at least two layers of plastic film and an outer layer of aluminum foil, and then manually taking readings, the apparatus described in this scheme greatly saves testing time, reduces complicated operating procedures and human error for experimenters, and improves experimental efficiency. At the same time, it improves experimental accuracy and saves energy consumption caused by environmental control during maintenance.
[0040] Example 2
[0041] The structure and principle of Example 2 are similar to those of Example 1, except that, according to existing experimental standards and specifications, it includes three sets of contact nail heads, which are arranged at intervals along the test block placement area.
[0042] Example 3
[0043] The structure and principle of Example 3 are similar to those of Example 1, except that: if subsequent experimental standards and specifications are changed, it includes one, two, or four or more groups of contact nail heads; all contact nail heads are spaced out along the test block placement area. This design incorporates multiple numbers of contact nail heads, not limited to the three groups specified in the experimental specifications; if subsequent experimental specifications are updated to require more test blocks for simultaneous testing, this device can also be used, improving its versatility.
[0044] In embodiments 1-3, the telescopic assembly uses an electric push rod, driven by electric induction. The telescopic assembly can also use a hydraulic cylinder or a pneumatic cylinder, etc.
[0045] Example 4
[0046] The structure and principle of Example 4 are similar to those of Example 2 or 3, except that: in order to ensure the accuracy of the detection structure of this device, the end face of the contact nail head is a vertically arranged plane, and it adopts polygons, ellipses, circles, etc., while the nail head in the demolding test block adopts a spherical structure; the contact nail head and the nail head in the demolding test block are in point contact.
[0047] In Examples 1-4, the humidity within the experimental chamber is controlled at 20%–80%, and the temperature at 16°C–30°C. Based on the specified humidity and temperature ranges, humidification and air conditioning units with appropriate power are selected.
[0048] The humidification unit uses an existing small intelligent humidifier, and the air conditioning unit uses an existing small intelligent heating, cooling, and dehumidifying air conditioner. Both the humidification and air conditioning units are integrated on the experimental platform, and each is equipped with a humidity sensor within the experimental chamber. Using intelligent humidifiers and air conditioners allows for automatic adjustment of temperature and humidity within the experimental chamber, eliminating the need for frequent human intervention and reducing the workload.
[0049] In Examples 1-4, the shell is made of transparent material to facilitate observation of the specimen's condition; the experimental platform has a polygonal or arc-shaped planar dimension.
[0050] Example 5
[0051] The structure and principle of Example 5 are similar to those of Examples 2-4, except that: an anti-slip grid is set in the test block placement area; and several marking lines are set in the test block placement area, with one marking line corresponding to each group of contact nail heads, and the marking line and the line connecting two contact nail heads in the same group are on the same straight line.
[0052] Examples 1-5 also include a data acquisition and control system. This system employs a mature, existing structure, with all telescopic rod heads connected to it via lead-out lines 9. According to experimental specifications, the system periodically collects dimensional data of the demolded test blocks and controls the humidity and temperature within the experimental chamber to remain within a set range. This data acquisition and control system enables the timely and accurate collection of test block data according to the experimental plan, and the calculation of results, thus reducing the workload of experimental personnel.
[0053] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.
Claims
1. A device for automatically testing self-drying shrinkage of grout, characterized by: Comprising The sealed shell comprises an experimental platform and a shell, which is fixedly installed on the experimental platform in a detachable connection, and the two constitute a closed experimental cavity; The telescopic assembly and the contact type nail head are provided on the experimental platform. The contact type nail head is in a group of two. Several groups of contact type nail heads are distributed on both sides of the test block placement area. The contact type nail head is installed on the experimental platform through the telescopic assembly. Several demolding test blocks are placed in the test block placement area. Each group of contact type nail heads corresponds to a demolding test block, and the contact type nail head is attached to the nail head on both sides of the demolding test block. The humidifying unit and the air conditioning unit are provided on the experimental platform. According to the experimental requirements, the temperature and humidity of the experimental cavity are maintained within the temperature and humidity interval set by the experimental standard.
2. The automatic testing device for self-drying shrinkage of grouting material according to claim 1, characterized in that: It comprises three groups of contact type nail heads, which are arranged at intervals along the test block placement area.
3. The automatic testing device for self-drying shrinkage of grouting material according to claim 1, characterized in that: It comprises one group, two groups, or four groups or more contact type nail heads. All contact type nail heads are arranged at intervals along the test block placement area.
4. The automatic testing device for self-drying shrinkage of grouting material according to claim 2 or 3, characterized in that: The telescopic assembly adopts an electric push rod driven by electric induction.
5. The automatic testing device for self-drying shrinkage of grouting material according to claim 1, characterized in that: The end face of the contact type nail head is a vertically arranged plane, and the nail head in the demolding test block adopts a spherical structure. The contact type nail head and the nail head in the demolding test block are in point contact.
6. The automatic testing device for self-drying shrinkage of grouting material according to claim 1, characterized in that: The humidity in the experimental cavity is controlled to be 20% to 80%, and the temperature is 16℃ to 30℃.
7. The automatic testing device for self-drying shrinkage of grouting material according to claim 1 or 5, characterized in that: The humidifying unit adopts an existing small intelligent humidifier, and the air conditioning unit adopts an existing small intelligent heating, refrigeration and dehumidification air conditioner. The humidifying unit and the air conditioning unit are integrated on the experimental platform and are provided with humidity detection heads in the experimental cavity.
8. The automatic testing device for self-drying shrinkage of grouting material according to claim 1, characterized in that: The shell adopts a transparent shell, and the plane size of the experimental platform is polygonal or circular arc.
9. The automatic testing device for self-drying shrinkage of grouting material according to claim 1, characterized in that: A non-slip grid is provided in the test block placement area, and a plurality of marking lines are provided in the test block placement area. Each group of contact type nail heads corresponds to a marking line, and the marking line and the connecting line of the two contact type nail heads in the same group are on the same straight line.
10. The automatic testing device for self-drying shrinkage of grouting material according to claim 1, characterized in that: It also includes a data acquisition control system, which adopts an existing mature structure. All telescopic rod heads are connected to the data acquisition control system through lead wires. According to the experimental specifications, the size data of the demolding test block is collected regularly, and the humidity and temperature in the experimental cavity are controlled to maintain within the set interval.