Alkali aggregate test box

Abstract

The utility model discloses an alkali aggregate test box which comprises a box body, an alkali liquor tank is arranged on the left side in the box body, and a hollow plate is fixed at the lower part of the inner side of the alkali liquor tank; according to the utility model, the lye tank and the volume measuring tank are arranged on the box body, when an alkali aggregate test is carried out, a concrete test block soaked in the lye tank is wiped clean and then transferred to the volume measuring tank, and the volume change value of the concrete test block immersed in an aqueous solution of the volume measuring tank can be directly read through the scale marks of the toughened glass; or an external measuring tool is adopted to directly measure the expansion change value of the concrete test block, on the basis, the arrangement square frame is movably arranged on the hollowed-out plate of the lye tank to provide an accommodating space for the concrete test block, and slag falling from the concrete test block is filtered through the slag filtering net on the surface of the arrangement square frame; the situation that disintegrating slag is scattered in the box body and is difficult to clean can be avoided while the concrete test block is convenient to transfer.

Description

Technical Field

[0001] This utility model relates to the field of alkali-aggregate testing technology, and in particular to an alkali-aggregate test chamber. Background Technology

[0002] The alkali-aggregate test is a method used to assess the impact of alkali-aggregate mixtures on concrete performance. During concrete preparation, the use of aggregates containing alkaline substances may lead to alkali-aggregate reaction (AAR), resulting in reduced volume stability and even structural damage. The alkali-aggregate test is typically conducted in a laboratory setting to evaluate the potential impact of AAR in concrete. In the test, concrete samples are prepared as strips and immersed in an alkaline liquid. After being stored at a specific temperature for a period of time, if AAR is present, a series of chemical reactions will occur, causing the concrete volume to expand. By measuring the volume change, the degree of AAR in the concrete can be assessed.

[0003] A search revealed that application number CN202223085814.9 discloses an alkali-aggregate reaction test chamber with good thermal insulation, comprising a chamber body, a lid connected to the top of the chamber body via a connecting mechanism, the connecting mechanism including a lead screw, one end of which is fixedly connected to the outer wall of the chamber body, a movable plate sleeved on the outside of the lead screw, an insert plate fixedly connected to the top of the movable plate, one side of the insert plate being inserted into the lid and engaging with a slot on the outside of the chamber body; a cavity is provided inside the inner wall of the chamber body, and the cavity is filled with polyurethane foam; movable mechanisms are provided on both sides of the chamber body, each movable mechanism including a fixed plate, one side of which is fixedly connected to the outside of the chamber body, a threaded through hole on the fixed plate, a screw threaded through the threaded through hole, a rotary knob fixedly connected to the top of the screw, and a movable wheel mounting seat connected to the bottom of the screw via a shock absorber, with movable wheels mounted on the bottom of the movable wheel mounting seat; this utility model has thermal insulation performance, is easy to carry, and is convenient to use.

[0004] However, the proposed solution does not include a structure for measuring the volume of concrete. In the actual alkali-aggregate test, since the test personnel need to wipe the water stains on the surface of the test concrete multiple times and put it into the container for measuring the volume to record and evaluate the volume change values, the box in the above solution does not carry a container for measuring the volume, which is difficult to meet the actual testing needs and contradicts the principle of "easy to carry and easy to use". Secondly, during the alkali-aggregate test, some fragments of concrete test blocks will fall off during the handling process, which is not conducive to the later maintenance and cleaning of the test box.

[0005] Therefore, an alkali-aggregate test chamber is proposed, which has the advantages of convenient alkali-aggregate testing and debris cleaning, thereby solving the problems in the background technology mentioned above. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an alkali-aggregate test chamber.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an alkali aggregate test chamber, comprising a chamber body, an alkali solution tank is provided on the left side inside the chamber body, and a perforated plate is fixed on the lower part of the inner side of the alkali solution tank. An electric heating tube is provided below the perforated plate and fixedly connected to the inner wall of the alkali solution tank. A mounting frame is movably provided on the top surface of the perforated plate. A filter screen is welded to the side of the mounting frame. A volume measuring slot is provided on the right side inside the chamber body, and tempered glass is embedded in the side of the chamber body corresponding to the volume measuring slot. Scale lines are affixed to the surface of the tempered glass of the chamber body. A temperature controller is fixed on the outer surface of the chamber body, and the output end of the temperature controller is electrically connected to the electric heating tube in the alkali solution tank. A temperature measuring element is installed on the inner wall of the alkali solution tank, and the temperature measuring element is electrically connected to the temperature controller.

[0008] As a further description of the above technical solution: the surface of the hollow plate is evenly provided with a number of holes, and four connecting posts are welded to the top surface of the hollow plate. A connecting sleeve is welded to each of the four corners of the bottom surface of the mounting frame, and the connecting sleeve is inserted into the connecting posts of the hollow plate.

[0009] As a further description of the above technical solution: two U-shaped handles are welded to the opening on the top surface of the mounting frame, and both U-shaped handles of the mounting frame extend to the outside of the box.

[0010] As a further description of the above technical solution: the temperature measuring element is specifically a contact temperature sensor, and the probe of the temperature measuring element is immersed in the alkaline solution in the alkaline solution tank.

[0011] As a further description of the above technical solution: the internal space of the volume measuring groove is a rectangular elongated cavity structure, and the depth of the tempered glass length and volume measuring groove is adapted to it.

[0012] As a further description of the above technical solution: the filter screen is in the shape of a rectangular frame, and the filter screen and the mounting frame are an integral structure, and the pore size of the filter screen is 1-2mm.

[0013] This utility model has the following beneficial effects:

[0014] In this invention, an alkali solution tank and a volume measurement tank are installed on the test chamber. When conducting alkali-aggregate tests, concrete test blocks immersed in the alkali solution tank are wiped clean and transferred to the volume measurement tank. The volume change value of the concrete test blocks submerged in the aqueous solution of the volume measurement tank can be directly read through the scale lines of the tempered glass, or the expansion change value of the concrete test blocks can be directly measured using an external measuring tool. In addition, a frame is movably installed on the perforated plate of the alkali solution tank to provide a space for the concrete test blocks, and the filter screen on its surface filters out the debris that falls off the concrete test blocks. This facilitates the transfer of concrete test blocks and also prevents debris from scattering inside the test chamber and becoming difficult to clean. Compared with the prior art, this invention not only meets the volume measurement requirements of the alkali-aggregate test stage but also prevents the debris from scattering and becoming difficult to clean. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an alkali aggregate test chamber according to the present invention;

[0016] Figure 2 This is a schematic diagram of the internal structure of the box;

[0017] Figure 3 This is a structural diagram for placing the frame.

[0018] Legend:

[0019] 1. Box body; 2. Alkali solution tank; 3. Installation frame; 4. Volume measuring tank; 5. Temperature controller; 6. Tempered glass; 7. Scale lines; 8. Temperature measuring element; 9. Hollow plate; 10. Electric heating tube; 11. Connecting sleeve; 12. Connecting column; 13. U-shaped handle; 14. Filter screen. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] According to an embodiment of the present invention, an alkali-aggregate test chamber is provided.

[0022] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-3As shown, an alkali aggregate test chamber according to an embodiment of the present invention includes a chamber body 1. An alkali solution tank 2 is provided on the left side inside the chamber body 1. A perforated plate 9 is fixed to the lower inner side of the alkali solution tank 2. An electric heating tube 10, fixedly connected to the inner wall of the alkali solution tank 2, is provided below the perforated plate 9. A mounting frame 3 is movably provided on the top surface of the perforated plate 9. A filter screen 14 is welded to the side of the mounting frame 3. A volume measuring groove 4 is provided on the right side inside the chamber body 1. Tempered glass 6 is embedded and installed on the side of the chamber body 1 corresponding to the volume measuring groove 4. The tempered glass 6 of the chamber body 1... The surface is affixed with scale lines 7. A temperature controller 5 is fixed on the outer surface of the box 1, and the output end of the temperature controller 5 is electrically connected to the electric heating tube 10 in the alkali tank 2. A temperature measuring element 8 is installed on the inner wall of the alkali tank 2, and the temperature measuring element 8 is electrically connected to the temperature controller 5. In this patent, we only use the temperature controller 5 and have not improved its structure and function. Its setting method, installation method and electrical connection method can be adjusted and operated by those skilled in the art according to the requirements of its instruction manual, and will not be described in detail here.

[0023] In one embodiment, the surface of the perforated plate 9 is evenly provided with a number of holes, and four connecting posts 12 are welded to the top surface of the perforated plate 9. A connecting sleeve 11 is welded to each of the four corners of the bottom surface of the mounting frame 3, and the connecting sleeve 11 is inserted into the connecting posts 12 of the perforated plate 9. The perforated plate 9 facilitates heat transfer and provides support for the mounting frame 3. The connecting sleeve 11 and the connecting posts 12 facilitate the positioning of the mounting frame 3.

[0024] In one embodiment, two U-shaped handles 13 are welded to the opening on the top surface of the mounting frame 3, and both U-shaped handles 13 of the mounting frame 3 extend to the outside of the box body 1. The U-shaped handles 13 facilitate quick and easy placement and removal of the mounting frame 3, and make it convenient to transfer the concrete test block to be tested.

[0025] In one embodiment, the temperature sensing element 8 is specifically a contact temperature sensor, and the probe of the temperature sensing element 8 is immersed in the alkaline solution in the alkaline solution tank 2. The temperature sensing element 8 is configured so that the temperature controller 5 can control the temperature.

[0026] In one embodiment, the internal space of the volume measuring groove 4 is a rectangular elongated cavity structure, and the length of the tempered glass 6 is adapted to the depth of the volume measuring groove 4. By setting the volume measuring groove 4, the visual perception of volume change can be magnified with a accommodating space that fits the concrete test block, so as to accurately measure the volume change value.

[0027] In one embodiment, the filter screen 14 is in the shape of a rectangular frame, and the filter screen 14 and the mounting frame 3 are integrally formed. The filter screen 14 has a pore size of 1-2 mm. By setting the filter screen 14, any fragments that may fall off can be collected, and the filter screen 14 can prevent fragments from falling into the alkali tank 2 of the box body 1, which facilitates the cleaning of the alkali tank 2.

[0028] Working principle:

[0029] In use, the electric heating element is first activated by the temperature controller 5 to heat the alkali solution in the alkali solution tank 2. The temperature sensing element 8, located in the alkali solution tank 2, feeds back the detected temperature data to the temperature controller 5. The temperature controller 5 then cuts off the power supply after the electric heating element 10 exceeds the preset temperature range, achieving constant temperature heating of the alkali solution in the alkali solution tank 2. Then, the concrete test block is placed in the placement frame 3 of the alkali solution tank 2 and allowed to react for a period of time. When it is necessary to measure the expansion volume of the concrete test block, it is cleaned after being immersed in the alkali solution tank 2 and then transferred... The concrete test block is moved to the volume measurement tank 4. The volume change value of the concrete test block immersed in the aqueous solution of the volume measurement tank 4 can be directly read through the scale line 7 of the tempered glass 6, or the expansion change value of the concrete test block can be directly measured by an external measuring tool. On this basis, a placement frame 3 is movably set on the hollow plate 9 of the alkali tank 2 to provide a space for the concrete test block. The filter screen 14 on its surface filters the debris that falls off the concrete test block. This facilitates the transfer of the concrete test block and also avoids the situation where debris is scattered inside the box 1 and is difficult to clean.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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. An alkali-aggregate testing chamber, comprising a chamber body (1), characterized in that: The box body (1) has an alkali tank (2) on the left side inside, and a perforated plate (9) is fixed to the lower part of the inner side of the alkali tank (2). An electric heating tube (10) is fixedly connected to the inner wall of the alkali tank (2) below the perforated plate (9), and a mounting frame (3) is movably installed on the top surface of the perforated plate (9). A filter screen (14) is welded to the side of the mounting frame (3). The box body (1) has a volume measuring groove (4) on the right side inside, and the box body (1) has a volume measuring groove (4) on the right side inside. Tempered glass (6) is embedded in the volume measuring groove (4) on the side of the body (1), and scale lines (7) are pasted on the surface of the tempered glass (6) of the box body (1). A temperature controller (5) is fixed on the outer surface of the box body (1), and the output end of the temperature controller (5) is electrically connected to the electric heating tube (10) in the alkali tank (2). A temperature measuring element (8) is installed on the inner wall of the alkali tank (2), and the temperature measuring element (8) is electrically connected to the temperature controller (5).

2. The alkali-aggregate test chamber according to claim 1, characterized in that: The surface of the perforated plate (9) is evenly provided with several holes, and four connecting posts (12) are welded to the top surface of the perforated plate (9). A connecting sleeve (11) is welded to each of the four corners of the bottom surface of the placement frame (3), and the connecting sleeve (11) is inserted into the connecting post (12) of the perforated plate (9).

3. The alkali-aggregate test chamber according to claim 1, characterized in that: Two U-shaped handles (13) are welded to the opening on the top surface of the mounting frame (3), and both U-shaped handles (13) of the mounting frame (3) extend to the outside of the box body (1).

4. The alkali-aggregate test chamber according to claim 1, characterized in that: The temperature measuring element (8) is specifically a contact temperature sensor, and the probe of the temperature measuring element (8) is immersed in the alkaline solution in the alkaline solution tank (2).

5. The alkali-aggregate test chamber according to claim 1, characterized in that: The internal space of the volume measuring groove (4) is a rectangular elongated cavity structure, and the length of the tempered glass (6) is adapted to the depth of the volume measuring groove (4).

6. The alkali-aggregate test chamber according to claim 1, characterized in that: The filter screen (14) has a rectangular frame structure, and the filter screen (14) and the mounting frame (3) are an integral structure, and the pore size of the filter screen (14) is 1-2 mm.

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