Foam concrete impermeability detection device and detection method

Abstract

The invention provides a foam concrete impermeability detection device and detection method, and belongs to the technical field of concrete detection. The foam concrete impermeability detection device comprises a water injection module, a pressurization module, a seepage water collection module and a seepage measurement module. The water injection module comprises a top plate and side plates, and water injection holes are formed in the top plate and the side plates. Water is injected into the foam concrete test block through the top plate and the side plates, and pressure is provided for the foam concrete through the pressurizing module. The seepage water collecting module is used for collecting and recording the amount of seepage water seeping from the bottom surface of the foam concrete test block. The seepage metering module is used for calculating the seepage coefficients of the foam concrete under different preset pressure values according to the water outlet area of the foam concrete, the pressure of the pressurizing module and the seepage amount collected by the seepage water collecting module. The foam concrete impermeability detection device can measure the permeability coefficient of the foam concrete under the preset pressure, and the reliability of the test result is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete detection, and in particular to a foam concrete impermeability detection device and a detection method. Background Art

[0002] Foamed concrete is made by mixing cement, water, foaming agent, etc. in a certain proportion. During the mixing process, air or nitrogen is introduced into the concrete slurry by physical or chemical methods, so that a porous structure is formed inside the foamed concrete after solidification. Foamed concrete has light weight, low density, good thermal insulation and earthquake resistance. Therefore, foamed concrete is widely used in the field of construction engineering.

[0003] As an important material in construction projects, the impermeability of foamed concrete is directly related to the durability and safety of buildings. If the impermeability of foamed concrete is insufficient, moisture can easily penetrate into the interior of the building, causing problems such as dampness and mold on the walls. In serious cases, it may also affect the structural safety of the building. Therefore, testing the impermeability of foamed concrete and evaluating its quality are important steps to ensure project quality and building safety.

[0004] Before using the existing foam concrete impermeability testing device to test the foam concrete impermeability, the foam concrete will first be made into a cubic test block, and the side of the concrete test block will be wrapped with a test mold to expose the top and bottom surfaces of the concrete test block. Then the concrete test block wrapped with the test mold will be placed in a glass container. The test mold will fit tightly with the inner wall of the glass container, and then water will be injected into the glass container. The water will first contact the top surface of the concrete test block. After a predetermined time t, the water will penetrate from the top surface of the concrete test block to the inside of the concrete test block, and finally seep out from the bottom surface of the concrete test block. Collect the water that seeps out from the bottom surface of the concrete test block, measure the volume V of the seeping water, and calculate the permeability coefficient K of the concrete test block per unit time according to the formula V / t. Repeat multiple groups of experiments in this way, calculate the average value of the number of penetrations of the concrete test block, and reduce the test error.

[0005] It should be noted that there are many factors that affect the impermeability of foam concrete. In addition to the chemical properties of foam concrete itself, when foam concrete is subjected to a certain pressure, many small cracks will appear inside the foam concrete, which increases the permeability of the foam concrete. The existing foam concrete impermeability detection device can only measure the impermeability of foam concrete under no pressure, while foam concrete must have various pressure sources such as soil pressure and wall pressure during actual use. It can be seen that the existing foam concrete impermeability detection device cannot ensure that the test environment is consistent with the actual use environment of the foam concrete during detection, resulting in inaccurate test results. Summary of the invention

[0006] One purpose of the present invention is to solve the problem that the existing foam concrete detection device cannot measure the impermeability of foam concrete when it is subjected to pressure, resulting in the foam concrete impermeability result obtained from the test being inconsistent with the impermeability of the foam concrete when it is actually used.

[0007] In particular, an embodiment of the present application provides a foam concrete impermeability detection device, comprising:

[0008] The water injection module comprises a plurality of side plates arranged on the side of the foam concrete test block and abutting against the side of the foam concrete test block, and a top plate arranged on the top surface of the foam concrete test block and abutting against the top surface of the foam concrete test block, wherein the side plates and the top plate define a receiving groove for receiving the foam concrete test block, and a preset number of water injection holes are arranged on the side plates and the top plate, and the water injection holes are used to introduce water flow for injecting water into the side and top surfaces of the foam concrete test block;

[0009] A pressurizing module, used to apply pressure to the top plate and each of the side plates respectively, so that the top plate applies corresponding preset pressure values ​​to the foam concrete test block in a direction perpendicular to the top surface of the foam concrete test block and the side plates apply corresponding preset pressure values ​​to the foam concrete test block in a direction perpendicular to the side surfaces of the foam concrete test block;

[0010] A seepage water collection module, used to collect and record the amount of seepage water seeping from the bottom surface of the foam concrete test block;

[0011] The permeability metering module is used to calculate the permeability coefficient of the foamed concrete under different preset pressure values ​​according to the water outlet area of ​​the foamed concrete, the pressure of the pressurizing module, and the amount of seepage water collected by the seepage water collecting module.

[0012] Furthermore, the side plate and the top plate include an abutting portion abutting against the foam concrete test block and a water containing cavity arranged on a side of the abutting portion away from the foam concrete test block, a plurality of water injection holes pass through the abutting portion, and the water containing cavity is connected to the plurality of water injection holes and an external water source.

[0013] Furthermore, sealing strips are provided on the peripheral sides of the side panels and the top panel, the sealing strips abut against the foam concrete test block, and the sealing strips are used to prevent water from seeping out from the gaps between the side panels and the top panel and the foam concrete test block when water is injected into the top and bottom surfaces of the foam concrete through the water injection holes.

[0014] Furthermore, the foam concrete impermeability testing device of the present invention also includes a water tank, the water injection module is placed in the water tank, the bottom surface of the foam concrete test block is abutted against the bottom surface of the water tank, and a guide pipe is also provided on the water tank, one end of the guide pipe is connected to the interior of the water tank, and the other end extends out of the water tank, so that the water overflowing from the water tank is injected into the seepage water collection module.

[0015] Furthermore, the evaporation control module is used to record the amount of water evaporation under the test environment of the foam concrete test block, so that the permeation metering module can correct the amount of seepage water collected by the seepage water collection module according to the amount of water evaporation.

[0016] Furthermore, the evaporation control module and the permeated water collection module have the same evaporation area, so as to ensure that the water in the evaporation control module and the permeated water collection module have the same evaporation rate under the same environmental conditions.

[0017] The present invention also provides a foam concrete impermeability detection method, which is used in the foam concrete impermeability detection device, comprising:

[0018] Step S100, placing the foamed concrete test block in the containing tank of the water injection module;

[0019] Step S200, controlling the side plate and the top plate to press the foam concrete test block according to corresponding preset pressure values;

[0020] Step S300, injecting water into the water injection hole, and after a preset time, the permeation metering module reads the volume V1 of water in the permeation water collection module and the water outlet area S of the bottom surface of the foam concrete test block;

[0021] Step S400: The permeability metering module calculates the permeability coefficient of the foamed concrete at a preset pressure value according to the following formula K=V1 / S.

[0022] Furthermore, after step S300, the following steps are further included:

[0023] The permeation metering module reads the volume V2 of water in the evaporation metering module when injecting water into the water injection hole;

[0024] After a preset time, the volume V3 of water in the evaporation metering module is read;

[0025] The evaporation metering module calculates the permeability coefficient of the foam concrete at a preset pressure value according to the formula K=[(1+μ)×V1] / S, wherein the evaporation coefficient μ=(V2-V3) / V2.

[0026] The beneficial effects of the present invention are:

[0027] 1. The foam concrete impermeability testing device of the present invention applies a preset pressure to the foam concrete test block through the side plates and the top plate to simulate the pressure that the foam concrete may be subjected to in actual use, and then injects water into the surface of the foam concrete test block through the water injection hole to measure the impermeability of the foam concrete test block when subjected to pressure, so that the permeability coefficient result obtained from the test is consistent with the permeability of the foam concrete in actual use, so that the test value of the foam concrete impermeability coefficient is closer to the actual value, thereby ensuring the reliability of the test result.

[0028] 2. By setting up the evaporation control module, the evaporation amount of the infiltration water collected by the infiltration water collection module under the same test environment and the same test time can be observed, and the amount of water infiltrated from the foam concrete test block can be corrected to ensure the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of a foam concrete impermeability detection device according to one embodiment of the present invention;

[0030] Figure 2 is a cross-sectional view of a water injection module according to one embodiment of the present invention;

[0031] Figure 3 is a flow chart of a foam concrete detection method according to an embodiment of the present invention;

[0032] Figure 4 FIG. 1 is a flowchart of step S300 according to an embodiment of the present invention.

[0033] In the figure:

[0034] 100-foam concrete impermeability testing device; 1-water injection module; 11-side plate; 12-top plate; 13-water injection hole; 14-abutment portion; 15-water holding chamber; 2-pressurization module; 3-seepage water collection module; 4-foam concrete test block; 5-water storage tank; 6-flow guide pipe; 7-evaporation control module; 9-water inlet. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0036] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] The foam concrete impermeability detection device 100 of the present invention includes a water injection module 1, a pressurizing module 2, a permeation water collection module 3 and a permeation metering module (not shown). The water injection module 1 includes a plurality of side panels 11 arranged on the side of the foam concrete test block 4 and abutting against the side of the foam concrete test block 4, and a top panel 12 arranged on the top surface of the foam concrete test block 4 and abutting against the top surface of the foam concrete test block 4. The side panels 11 and the top panel 12 define a receiving groove for accommodating the foam concrete test block 4. A preset number of water injection holes 13 are arranged on the side panels 11 and the top panel 12, and the water injection holes 13 are used to introduce water flow for injecting water into the side and top surface of the foam concrete test block 4. The pressurizing module 2 is used to apply pressure to the top panel 12 and each side panel 11 respectively, so that the top panel 12 applies corresponding preset pressure values ​​to the foam concrete test block 4 in a direction perpendicular to the top surface of the foam concrete test block 4 and the side panels 11 apply corresponding preset pressure values ​​to the foam concrete test block 4 in a direction perpendicular to the side of the foam concrete test block 4. The seepage water collection module 3 is used to collect and record the amount of seepage water seeping from the bottom surface of the foam concrete test block 4. The permeation metering module is used to calculate the permeability coefficient of the foam concrete under different preset pressure values ​​according to the water outlet area of ​​the foam concrete, the pressure of the pressurizing module 2, and the amount of seepage water collected by the seepage water collection module 3.

[0039] Among them, the size of the preset pressure can be determined according to the pressure value that the foam concrete may be subjected to during actual use. The number of water injection holes 13 is not limited, as long as the top surface and the side surface of the foam concrete test block 4 can be fully in contact with water. The foam concrete impermeability detection device 100 of the present invention applies a preset pressure to the foam concrete test block 4 through the side plates 11 and the top plate 12 to simulate the pressure that the foam concrete may be subjected to during actual use, and then injects water into the surface of the foam concrete test block 4 through the water injection holes 13 to measure the impermeability of the foam concrete test block 4 when subjected to pressure, so that the permeability coefficient result obtained by the test is consistent with the permeability of the foam concrete during actual use, so that the test value of the foam concrete impermeability coefficient is closer to the actual value, and the reliability of the test result is guaranteed.

[0040] Regarding the structure of the side plate 11 and the top plate 12, in one embodiment, the pressurizing module 2 is a hydraulic rod disposed on the side of the side plate 11 and the top plate 12 away from the foam concrete test block 4. The water injection hole 13 runs through the thickness direction of the side plate 11 and the top plate 12. A water bag (not shown) is disposed on the side of the side plate 11 and the top plate 12 away from the foam concrete test block 4. The water bag is connected to the water injection hole 13. After water is injected into the water bag, the water enters the water injection hole 13.

[0041] In another embodiment, the side plate 11 and the top plate 12 include an abutting portion 14 abutting against the foam concrete test block 4 and a water containing cavity 15 disposed on a side of the abutting portion 14 away from the foam concrete test block 4, a plurality of water injection holes 13 pass through the abutting portion 14, and the water containing cavity 15 is connected to the plurality of water injection holes 13 and a water inlet 9 connected to an external water source. By providing the water containing cavity 15 and the abutting portion 14, the integrity of the water injection module 1 is improved.

[0042] In one embodiment, sealing strips (not shown) are provided around the side panels 11 and the top panel 12, and the sealing strips abut against the foam concrete test block 4. The sealing strips are used to prevent water from seeping out from the gaps between the side panels 11 and the top panel 12 and the foam concrete test block 4 when the water injection holes 13 inject water into the top and bottom surfaces of the foam concrete. By providing the sealing strips, water is prevented from seeping out from the gaps between the side panels 11 and the top panel 12 and the foam concrete test block 4, ensuring that the water is in full contact with the concrete test block. At the same time, water seeping out from the gaps is prevented from entering the infiltration water collection module 3, which increases the final test result and affects the accuracy of the test result.

[0043] Please refer again Figure 1The foam concrete impermeability testing device 100 of the present invention further includes a water tank 5, the water injection module 1 is placed in the water tank 5, the bottom surface of the foam concrete test block 4 abuts against the bottom surface of the water tank 5, and a guide pipe 6 is also provided on the water tank 5, one end of the guide pipe 6 is connected to the inside of the water tank 5, and the other end extends out of the water tank 5, and the overflowed water in the water tank 5 is injected into the infiltration water collection module 3. Through the above arrangement, it is convenient for the infiltration water collection module 3 to collect infiltration water.

[0044] In order to ensure the accuracy of the test results, the foam concrete impermeability testing device 100 of the present invention also includes an evaporation control module 7. The evaporation control module 7 is used to record the amount of water evaporation in the test environment where the foam concrete test block 4 is located, so that the permeation metering module can correct the amount of water collected by the permeation water collection module 3 according to the amount of water evaporation. Since the time required for the foam concrete impermeability testing is relatively long, it often takes several hours or even a day, especially in the high temperature environment in summer, the water evaporates quickly. The amount of permeation water collected by the permeation water collection module 3 decreases with evaporation. By setting the evaporation control module 7, the evaporation amount of permeation water collected by the permeation water collection module 3 under the same test environment and the same test time can be observed, and the amount of water infiltrated from the foam concrete test block 4 can be corrected to ensure the accuracy of the test results.

[0045] In one embodiment, the evaporation control module 7 and the permeated water collection module 3 have the same evaporation area, which is used to ensure that the water in the evaporation control module 7 and the permeated water collection module 3 have the same evaporation rate under the same environmental conditions. In order to fully ensure that the evaporation amount of water in the evaporation control module 7 is the same as the evaporation amount of water in the permeated water collection module 3, in another embodiment, the evaporation control module 7 and the permeated water collection module 3 adopt the same structural form, ensuring that the evaporation amount of water in the same test environment and the same test time is the same, thereby ensuring the accuracy of the test results.

[0046] The present invention also provides a foam concrete impermeability detection method, which is used in the foam concrete impermeability detection device 100, comprising:

[0047] Step S100, placing the foamed concrete test block 4 in the receiving tank of the water injection module 1;

[0048] Step S200, controlling the side plate 11 and the top plate 12 to press the foam concrete test block 4 according to the corresponding preset pressure value;

[0049] Step S300, water is injected into the water injection hole 13, and after a preset time, the permeation metering module reads the volume V1 of water in the permeation water collection module 3 and the bottom water outlet area S of the foam concrete test block 4;

[0050] Step S400: The permeability metering module calculates the permeability coefficient of the foamed concrete at a preset pressure value according to the following formula K=V1 / S.

[0051] By means of the above test method, the water seepage of the foamed concrete test block 4 per unit time and per unit area is calculated.

[0052] In one embodiment, in the above concrete impermeability detection method, after step S300, the following steps are further included:

[0053] S301, the permeation metering module reads the volume V2 of water in the evaporation metering module when injecting water into the water injection hole 13;

[0054] S302, reading the volume V3 of water in the evaporation metering module after a preset time;

[0055] S303, the evaporation metering module calculates the permeability coefficient of the foam concrete at a preset pressure value according to the formula K=[(1+μ)×V1] / S, wherein the evaporation coefficient μ=(V2-V3) / V2.

[0056] By using the above method, when calculating the permeability coefficient of the foam concrete test block 4 under the preset pressure, the evaporation amount of water in the seepage water collection module 3 is fully considered to ensure the accuracy of the test result.

[0057] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A foam concrete impermeability detection device, characterized in that: include: The water injection module comprises a plurality of side plates arranged on the side of the foam concrete test block and abutting against the side of the foam concrete test block, and a top plate arranged on the top surface of the foam concrete test block and abutting against the top surface of the foam concrete test block, wherein the side plates and the top plate define a receiving groove for receiving the foam concrete test block, and a preset number of water injection holes are arranged on the side plates and the top plate, and the water injection holes are used to introduce water flow for injecting water into the side and top surfaces of the foam concrete test block; A pressurizing module, used to apply pressure to the top plate and each of the side plates respectively, so that the top plate applies corresponding preset pressure values ​​to the foam concrete test block in a direction perpendicular to the top surface of the foam concrete test block and the side plates apply corresponding preset pressure values ​​to the foam concrete test block in a direction perpendicular to the side surfaces of the foam concrete test block; A seepage water collection module, used to collect and record the amount of seepage water seeping from the bottom surface of the foam concrete test block; The permeability metering module is used to calculate the permeability coefficient of the foamed concrete under different preset pressure values ​​according to the water outlet area of ​​the foamed concrete, the pressure of the pressurizing module, and the amount of seepage water collected by the seepage water collecting module.

2. The foam concrete impermeability detection device according to claim 1, characterized in that: The side plate and the top plate include an abutting portion abutting against the foam concrete test block and a water containing cavity arranged on a side of the abutting portion away from the foam concrete test block, a plurality of water injection holes pass through the abutting portion, and the water containing cavity is connected to the plurality of water injection holes and an external water source.

3. The foam concrete impermeability detection device according to claim 1, characterized in that: The side panels and the top panel are provided with sealing strips around the sides thereof, the sealing strips abut against the foam concrete test block, and the sealing strips are used to prevent water from seeping out from the gaps between the side panels and the top panel and the foam concrete test block when water is injected into the top and bottom surfaces of the foam concrete through the water injection holes.

4. The foam concrete impermeability detection device according to claim 1, characterized in that: It also includes a water tank, the water injection module is placed in the water tank, the bottom surface of the foam concrete test block is in contact with the bottom surface of the water tank, and a guide pipe is also provided on the water tank, one end of the guide pipe is connected to the inside of the water tank, and the other end extends out of the water tank to inject water overflowing from the water tank into the infiltration water collection module.

5. The foam concrete impermeability detection device according to claim 3, characterized in that: The evaporation control module is used to record the amount of water evaporation under the test environment of the foam concrete test block, so that the permeation metering module can correct the amount of seepage water collected by the permeation water collection module according to the amount of water evaporation.

6. The foam concrete impermeability detection device according to claim 5, characterized in that: The evaporation control module and the permeated water collection module have the same evaporation area, so as to ensure that the water in the evaporation control module and the permeated water collection module have the same evaporation rate under the same environmental conditions.

7. A foam concrete impermeability testing method, used in the foam concrete impermeability testing device according to any one of claims 1 to 6, characterized in that: include: Step S100, placing the foamed concrete test block in the containing tank of the water injection module; Step S200, controlling the side plate and the top plate to press the foam concrete test block according to corresponding preset pressure values; Step S300, injecting water into the water injection hole, and after a preset time, the permeation metering module reads the volume V1 of water in the permeation water collection module and the water outlet area S of the bottom surface of the foam concrete test block; Step S400: The permeability metering module calculates the permeability coefficient of the foamed concrete at a preset pressure value according to the following formula K=V1 / S.

8. The method for detecting concrete impermeability according to claim 7, characterized in that: After step S300, the following steps are further included: The permeation metering module reads the volume V2 of water in the evaporation metering module when injecting water into the water injection hole; After a preset time, the volume V3 of water in the evaporation metering module is read; The evaporation metering module calculates the permeability coefficient of the foam concrete at a preset pressure value according to the formula K=[(1+μ)×V1] / S, wherein the evaporation coefficient μ=(V2-V3) / V2.

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