Cement setting time test mold cover plate

Abstract

The utility model relates to a cement setting time test mold cover plate, and aims to solve the problem that condensed water drops on a cement paste test body in a moisture curing process to influence the accuracy of setting time measurement. The cover plate comprises a main body plate, and a first assembling part and a second assembling part which are arranged on the front and back surfaces of the main body plate. The first assembly part is matched with the initial setting surface of the setting time test mold, and the second assembly part is matched with the final setting surface, so that the cover plate can effectively cover the test mold and shield condensate water in the maintenance process before initial setting and final setting measurement. The design of the cover plate ensures that a gap is reserved between the cover plate and the surface of the test body, and contact with the test body is avoided. The cement setting time test mold cover plate is simple in structure and convenient to use, can effectively improve the accuracy and efficiency of cement setting time measurement, and is suitable for the field of cement quality detection.

Description

Technical Field

[0001] This utility model relates to the field of construction technology, and in particular to a cement setting time test mold cover plate. Background Technology

[0002] In cement quality testing, setting time is one of the important indicators for evaluating its performance. Cement setting time is typically divided into initial setting time and final setting time. Accurate determination of these two time points is crucial for judging cement quality, its application range, and the appropriate timing for application during construction. To determine cement setting time, a specialized setting time mold is used. Cement slurry is poured into the mold for curing, and the setting process is observed.

[0003] However, a common problem exists when curing setting time test molds containing cement slurry in a moisture curing chamber: condensation from the top of the chamber easily drips onto the cement slurry specimen inside the mold. This additional moisture intake interferes with the normal setting process of the cement, leading to inaccurate setting times. This inaccuracy can pose serious construction risks, especially in projects requiring precise control of construction conditions.

[0004] Furthermore, to distinguish between the initial and final setting surfaces, setting time molds are typically designed as conical cylinders, wider at one end and narrower at the other. While this design facilitates the separate measurement of initial and final setting times, it also increases the difficulty of preventing condensation from dripping during curing. Therefore, an auxiliary tool is needed that can effectively block condensation without affecting the measurement of initial and final setting times. Utility Model Content

[0005] The purpose of this utility model is to provide a cement setting time test mold cover plate to solve the technical problem that during the process of measuring cement setting time, condensate from the top of the curing box easily drips onto the cement slurry specimen inside the mold, resulting in inaccurate setting time measurements.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a cement setting time test mold cover plate, the cement setting time test mold cover plate comprising:

[0007] The main body plate is a circular plate structure.

[0008] The first assembly part is disposed on the front side of the main body plate. The first assembly part includes a first positioning plate and a first fixing plate. The first positioning plate and the first fixing plate are both disposed around the center of the main body plate. The diameter of the ring where the first positioning plate is located is the same as the inner diameter of the initial solidification surface of the solidification time test mold, and the diameter of the ring where the first fixing plate is located is the same as the outer diameter of the initial solidification surface of the solidification time test mold.

[0009] The second assembly part is disposed on the reverse side of the main body plate. The second assembly part includes a second positioning plate and a second fixing plate. The second positioning plate and the second fixing plate are both arranged around the center of the main body plate. The diameter of the ring where the second positioning plate is located is the same as the inner diameter of the final solidification surface of the solidification time test mold. The diameter of the ring where the first fixing plate is located is the same as the outer diameter of the final solidification surface of the solidification time test mold.

[0010] In one embodiment, the first positioning plate, the first fixing plate, the second positioning plate, and the second fixing plate are all arc-shaped plates, and the center of the arc of the first positioning plate, the first fixing plate, the second positioning plate, and the second fixing plate is the center of the main body plate.

[0011] In one embodiment, the main body panel is an acrylic panel.

[0012] In one embodiment, the first positioning plate, the first fixing plate, the second positioning plate, the second fixing plate and the mating position of the solidification time test mold are provided with a grinding structure.

[0013] In one embodiment, the upper inner side of the first fixing plate is provided with an outwardly expanding conical surface, and the conical surface is consistent with the shape of the outer surface of the solidification time test mold.

[0014] In one embodiment, the height of the first positioning plate and the second positioning plate is 2~3mm.

[0015] The above-described technical solutions in the embodiments of this utility model have at least the following technical effects or advantages:

[0016] The cement setting time mold cover plate provided in this embodiment of the invention, by designing a first assembly part and a second assembly part on both sides of the main body plate, allows the cover plate to adapt to the different sizes of the initial setting surface and the final setting surface of the setting time mold. During the curing process before the initial setting time measurement, the cover plate is installed and covers the initial setting surface through the first assembly part; while during the curing process before the final setting time measurement, the cover plate is installed and covers the final setting surface through the second assembly part, achieving comprehensive protection of the specimen during the initial and final setting processes. The main body plate structure of the cover plate can effectively block condensation in the moisture curing chamber, preventing it from dripping onto the cement slurry specimen, thereby avoiding the influence of additional moisture intake on the cement setting time and improving the accuracy of the measurement. Furthermore, the raised first and second positioning plates leave a certain gap between the cover plate and the surface of the specimen in the setting time mold below, ensuring that the cover plate does not contact the specimen and avoiding interference or damage caused by contact. This further reduces repeated measurements or mismeasurements caused by condensation problems, improving the reliability of cement setting time testing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of the cement setting time test mold cover plate provided in this embodiment of the utility model;

[0019] Figure 2 is a schematic diagram of the assembly between the cement setting time test mold cover plate and the setting time test mold during the initial setting curing process provided in this embodiment of the present invention.

[0020] Figure 3 is a schematic diagram of the assembly between the cement setting time test mold cover plate and the setting time test mold during final setting and curing provided in this embodiment of the present invention.

[0021] The labels for the various figures are as follows:

[0022] 1. Main body plate; 2. First assembly section; 3. Second assembly section; 4. Condensation time test mold; 21. First positioning plate; 22. First fixing plate; 31. Second positioning plate; 32. Second fixing plate; 221. Conical surface. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Please see Figures 1 to 3 This application provides a cover plate for a cement setting time test mold 4, including a main body plate 1, a first assembly part 2, and a second assembly part 3. The main body plate 1 is a circular plate structure. The first assembly part 2 is disposed on the front side of the main body plate 1 and includes a first positioning plate 21 and a first fixing plate 22. Both the first positioning plate 21 and the first fixing plate 22 are arranged around the center of the main body plate 1, and the diameter of the annulus where the first positioning plate 21 is located is the same as the inner diameter of the initial setting surface of the setting time test mold 4, and the diameter of the annulus where the first fixing plate 22 is located is the same as the outer diameter of the initial setting surface of the setting time test mold 4. The second assembly part 3 is disposed on the back side of the main body plate 1 and includes a second positioning plate 31 and a second fixing plate 32. Both the second positioning plate 31 and the second fixing plate 32 are arranged around the center of the main body plate 1, and the diameter of the annulus where the second positioning plate 31 is located is the same as the inner diameter of the final setting surface of the setting time test mold 4, and the diameter of the annulus where the first fixing plate 22 is located is the same as the outer diameter of the final setting surface of the setting time test mold 4.

[0028] To distinguish between the initial setting surface and the final setting surface, existing setting time molds 4 are typically designed as conical cylindrical structures, wider at one end and narrower at the other, with the narrower end serving as the initial setting test surface and the wider end as the final setting test surface. In this invention, the cover plate of the cement setting time mold 4 features a first assembly part 2 and a second assembly part 3 on each side of the main body plate 1. During the curing process before the initial setting time measurement, the main body plate 1 is installed and covers the initial setting surface of the setting time mold 4 via the first assembly part 2, shielding the cement slurry specimen below and preventing condensation from easily dripping onto the specimen inside the setting time mold 4. After the initial setting time measurement is completed, during the curing process before the final setting time measurement, the setting time mold 4 is flipped over, and the main body plate 1 is installed and covers the final setting surface of the setting time mold 4 via the second assembly part 3, again preventing condensation from easily dripping onto the specimen inside the setting time mold 4. Therefore, the cover plate of the cement setting time test mold 4 in this utility model can cover the specimen below during the initial setting / final setting curing process, preventing condensate in the moisture curing chamber from dripping onto the specimen and affecting the cement setting time. In addition, the raised first positioning plate 21 and second positioning plate 31 leave a certain gap between the main plate 1 and the specimen surface of the setting time test mold 4 below, so that it will not come into contact with the specimen.

[0029] The specific steps for determining setting time are as follows: Pour the prepared cement slurry sample into setting time mold 4 (with a glass plate at the bottom of setting time mold 4), transfer setting time mold 4 to a moisture curing chamber for curing, and place the front of the main plate 1 on top of setting time mold 4. At this point, if... Figure 2 As shown, the first positioning plate 21 rests against the top of the setting time mold 4, while the first fixing plate 22 is fastened to the side (conical surface 221) of the setting time mold 4. Through the height positioning function of the first positioning plate 21, the main plate 1 covers the top of the setting time mold 4 without contacting the specimen below. After curing for a period of time (specifically 30 minutes), the first measurement is performed. The specific measurement method is as follows: During the measurement, the cover plate is removed from the moisture curing chamber, the mold is placed under the test needle, and the test needle is lowered to contact the surface of the cement paste. After tightening the screw for 1-2 seconds, it is suddenly loosened, and the test needle sinks vertically and freely into the cement paste. The pointer reading is observed when the test needle stops sinking or 30 seconds after the test needle is released.

[0030] After completing the initial setting time measurement, the setting time mold 4 was rotated 180° so that the large end of the setting time mold 4 was on top and the small end was on the bottom, and placed on a glass plate. The setting time mold 4 was then transferred to a moisture curing chamber for further curing, and the reverse side of the main body plate 1 was placed on top of the setting time mold 4. Figure 3 As shown, at this time, the second positioning plate 31 rests against the top of the setting time mold 4, while the second fixing plate 32 is fastened to the side of the setting time mold 4. After curing is completed, the final setting time can be measured according to the above method.

[0031] In one embodiment, the first positioning plate 21, the first fixing plate 22, the second positioning plate 31, and the second fixing plate 32 are all arc-shaped plates, and the center of the arc of the first positioning plate 21, the first fixing plate 22, the second positioning plate 31, and the second fixing plate 32 is the center of the main plate 1.

[0032] By designing the first positioning plate 21, the first fixing plate 22, the second positioning plate 31, and the second fixing plate 32 as arc-shaped plates, and aligning their arc centers with the center of the main plate 1, these arc-shaped plates can better fit against the edge of the setting time mold 4 when the first assembly part 2 or the second assembly part 3 is assembled with the setting time mold 4. This design improves the fit between the cover plate of the cement setting time mold 4 and the setting time mold 4, thereby allowing the cover plate of the cement setting time mold 4 to be installed and covered on the setting time mold 4 more stably, effectively preventing slippage or detachment during use.

[0033] In one embodiment, the main body panel 1 is an acrylic sheet. Acrylic sheets, as the material for the main body panel 1, have advantages such as low price, high transparency, strong weather resistance, and ease of processing and cleaning.

[0034] In one embodiment, the first positioning plate 21, the first fixing plate 22, the second positioning plate 31, and the second fixing plate 32 are provided with grinding edges at their mating positions with the setting time mold 4. The grinding edges effectively prevent slippage of the cover plate of the cement setting time mold 4 during assembly. The grinding edges increase the roughness of the contact surfaces, improving friction and allowing the cover plate of the cement setting time mold 4 to be more securely installed on the setting time mold 4, ensuring the accuracy and reliability of the test.

[0035] In one embodiment, the upper inner side of the first fixing plate 22 is provided with an outwardly expanding conical surface 221, and this conical surface 221 is consistent with the outer surface shape of the setting time mold 4. Providing a conical surface 221 on the upper inner side of the first fixing plate 22 that is consistent with the outer surface shape of the setting time mold 4 can significantly increase the contact area between the first fixing plate 22 and the setting time mold 4. This design not only increases the stability between the cover plate of the cement setting time mold 4 and the setting time mold 4.

[0036] In one embodiment, the height of the first positioning plate 21 and the second positioning plate 31 is 2-3 mm. Limiting the height of the first positioning plate 21 and the second positioning plate 31 to 2-3 mm ensures that when the cover plate of the cement setting time mold 4 is placed on top of the setting time mold 4, the gap between the main plate 1 and the specimen below is 2-3 mm. This gap ensures that the cover plate can be stably placed on the mold while avoiding experimental errors caused by excessively large or small gaps. This appropriate gap design makes the cover plate of the cement setting time mold 4 more reliable during use and improves the accuracy of the test.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cement setting time test mold cover plate, characterized in that, The cement setting time test mold cover plate includes: The main body plate is a circular plate structure. The first assembly part is disposed on the front side of the main body plate. The first assembly part includes a first positioning plate and a first fixing plate. The first positioning plate and the first fixing plate are both disposed around the center of the main body plate. The diameter of the ring where the first positioning plate is located is the same as the inner diameter of the initial solidification surface of the solidification time test mold, and the diameter of the ring where the first fixing plate is located is the same as the outer diameter of the initial solidification surface of the solidification time test mold. The second assembly part is disposed on the reverse side of the main body plate. The second assembly part includes a second positioning plate and a second fixing plate. The second positioning plate and the second fixing plate are both arranged around the center of the main body plate. The diameter of the ring where the second positioning plate is located is the same as the inner diameter of the final solidification surface of the solidification time test mold. The diameter of the ring where the first fixing plate is located is the same as the outer diameter of the final solidification surface of the solidification time test mold.

2. The cement setting time test mold cover plate according to claim 1, characterized in that: The first positioning plate, the first fixing plate, the second positioning plate, and the second fixing plate are all arc-shaped plates, and the center of the arc of the first positioning plate, the first fixing plate, the second positioning plate, and the second fixing plate is the center of the main body plate.

3. The cement setting time test mold cover plate according to claim 1, characterized in that: The main body panel is made of acrylic sheet.

4. The cement setting time test mold cover plate according to claim 1, characterized in that: The first positioning plate, the first fixing plate, the second positioning plate, the second fixing plate and the mating position of the solidification time test mold are provided with a grinding structure.

5. The cement setting time test mold cover plate according to claim 1, characterized in that: The upper inner side of the first fixing plate is provided with an outwardly expanding conical surface, and the shape of the conical surface is consistent with the outer surface of the solidification time test mold.

6. The cement setting time test mold cover plate according to claim 1, characterized in that: The height of the first positioning plate and the second positioning plate is 2~3mm.

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