A performance testing method for high performance foam concrete

Abstract

The present invention discloses a performance testing method for high-performance foam concrete, wherein the formula of high-performance foam concrete includes, by weight ratio: 100-120 parts of cement, 42-48 parts of aggregate, 26-32 parts of admixture, 81-95 parts of water, 9-11 parts of activated carbon particles, 12-18 parts of ceramic particles, and 2-4 parts of foaming agent, and then, by mixing and stirring, it is prepared into a fluid form, and then poured on the road surface, or poured in a mold to make a permeable brick; the test method includes a water permeability test, a gas permeability test, a compression test, and a wear resistance test, which are used to test the various properties of the obtained foam concrete test sample. The present invention enables the obtained foam concrete to be applied to the paving of roads, and can be prepared into permeable bricks to be laid on pedestrian corridors, with extremely high strength, good water seepage and water containment capacity, and can effectively avoid cracking of the road surface, ensuring the safety of vehicles and pedestrians. The present invention is applicable to the technical field of preparation and testing of foam concrete.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete preparation and testing, and in particular relates to a performance testing method for high-performance foamed concrete. Background Art

[0002] The main characteristics of existing foam concrete are light weight, heat insulation, sound insulation, etc., and thus it is used in the fields of building exterior walls, but it is extremely difficult to apply it to other fields. Since foam concrete has a certain porosity, when it is used in the fields of heat insulation and sound insulation, waterproofing and anti-seepage measures are required.

[0003] At present, the cement or asphalt paved on the road has weak water infiltration and water retention capabilities. In a relatively dry climate, the road surface temperature gradually rises, and the heat spreads to the road surface and the space above through thermal radiation, thereby affecting the driver's field of vision. More seriously, it may cause the road surface to crack.

[0004] In order to facilitate pedestrians to walk, the measures taken are to lay permeable bricks on the roadside pedestrian walkway. The surface of the permeable bricks is rough and can effectively permeate water to prevent rainwater from accumulating on rainy days and affecting pedestrians' walking. However, the existing permeable bricks are weak in strength and short in service life, and need to be regularly inspected and replaced. Summary of the invention

[0005] The present invention provides a performance testing method for high-performance foam concrete, so that the obtained foam concrete can be used for road paving and can be prepared into permeable bricks for paving on pedestrian walkways. The foam concrete has extremely high strength, good water seepage and water retention capacity, can effectively avoid road cracking, and ensure the safety of vehicles and pedestrians.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] The invention discloses a performance testing method for high-performance foamed concrete, comprising the following steps:

[0008] Water penetration test

[0009] Step 1. Place the test sample in the middle of the test cylinder and separate the upper test chamber and the lower test chamber, and use one of the pressure-applying grinding mechanisms to press the test sample so that the test sample is firmly fixed in the middle of the test cylinder;

[0010] Step 2. Inject water into the upper test chamber of the test tube and perform the test by self-pressure or pressurization;

[0011] Step 3. Detect the amount of water entering the lower test chamber within a predetermined time;

[0012] Step 4. Analyze the water permeability of the test sample by the amount of water in the lower test cavity;

[0013] Air permeability test

[0014] S1. Place the test sample in the middle of the test tube, separate the upper test chamber and the lower test chamber, and use one of the pressure-type grinding mechanisms to press the test sample so that the test sample is firmly fixed in the middle of the test tube;

[0015] S2. The high-pressure gas is introduced into the upper test chamber so that the pressure in the upper test chamber reaches a predetermined value;

[0016] S3. Detect the air pressure in the lower test chamber within a predetermined time, and in this process, always maintain a constant pressure in the upper test chamber;

[0017] S4. Analyze the air permeability of the test sample by the pressure change in the lower test chamber;

[0018] Compression performance test

[0019] ①. Place the test sample in the middle of the test tube, and use one of the pressure-type grinding mechanisms to press the test sample so that the test sample is firmly fixed in the middle of the test tube;

[0020] ②. Control another pressure-type grinding mechanism to apply pressure or reciprocating impact to different positions of the test sample;

[0021] ③. Obtain the compressive limit value of the test sample, or obtain the impact fatigue limit value of the test sample;

[0022] Wear resistance test

[0023] (1) Place the test sample in the middle of the test tube and use one of the pressure-applying grinding mechanisms to press the test sample so that the test sample is firmly fixed in the middle of the test tube;

[0024] (2) Controlling another pressure-type grinding mechanism to press against the other end surface of the test sample, or controlling another pressure-type grinding mechanism to separate from the test sample;

[0025] (3) Control the driving mechanism to drive the test tube to rotate the test sample, and the pressure-type grinding mechanism in contact with the end surface of the test sample grinds the test sample;

[0026] (4) Within a predetermined time, stop grinding, take out the test sample, and measure the grinding depth to analyze the wear resistance of the test sample.

[0027] Furthermore, in the water permeability test, the self-pressure method is to add water into the upper test chamber, and under normal pressure, a part of the water enters the lower test chamber through the test sample; the pressurized method is to add water into the upper test chamber, and then, pressurized gas is passed into the upper test chamber, so that the pressure in the upper test chamber reaches a predetermined value, and the pressure in the upper test chamber is maintained constant, and the water is pressurized and enters the lower test chamber through the test sample.

[0028] Furthermore, in the compressive performance test, when the continuous pressure method is used, the pressure when the 10 cm thick test sample is broken or fractured is the compressive limit value of the test sample; when the reciprocating impact method is used, the test is carried out according to the predetermined impact force, and the number of impacts is recorded. The impact fatigue limit value is the time when the 10 cm thick test sample is crushed.

[0029] Furthermore, the test cylinder is connected to the connecting frame through an annular adapter, and the test cylinder is rotatably connected to the annular adapter, the driving mechanism is transmission-connected to the test cylinder, and an upper connecting cover and a lower connecting cover are respectively installed at the upper and lower ends of the test cylinder, and the two pressure-type grinding mechanisms extend into the test cylinder through the upper connecting cover and the lower connecting cover respectively.

[0030] Furthermore, the test cylinder includes a vertically arranged cylindrical body, the radial cross-section of the inner wall of the cylindrical body is a regular polygon, the cross-section of the test sample is a regular polygon that matches the inner wall of the cylindrical body, a receiving flange extending radially inward is constructed in the middle of the cylindrical body, the test sample is arranged on the upper end surface of the receiving flange, and an upper test cavity and a lower test cavity are formed above and below the test sample, and an upper identification scale and a lower identification scale are marked on the outer wall of the cylindrical body, and the upper identification scale and the lower identification scale are respectively located at the upper test cavity and the lower test cavity.

[0031] Furthermore, an adapter flange extending radially outward is constructed on the outer wall of the test cylinder, and the annular adapter seat includes two oppositely arranged semi-ring parts, a semi-ring groove is opened on the arc-shaped wall on one side of each semi-ring part close to the test cylinder, and connecting ears are respectively constructed on the two free ends of the semi-ring parts. The corresponding connecting ears of the two semi-ring parts are connected and fixed by fastening bolts, and the two semi-ring parts are rotatably buckled on the adapter flange, and a fixing ear is constructed at the end of the two semi-ring parts away from each other, and each of the fixing ears is fixed to the connecting frame.

[0032] Furthermore, circular assembly openings are respectively provided on the upper connecting cover and the lower connecting cover, and the center line of each circular assembly opening deviates from the center line of the corresponding upper connecting cover or the lower connecting cover. An eccentric adjustment disk is rotatably connected in each circular assembly opening, and each pressure-type grinding mechanism extends into the test cylinder through the corresponding eccentric adjustment disk, and each eccentric adjustment disk is connected to the annular adapter through a lifting mechanism.

[0033] Furthermore, the pressure-type grinding mechanism includes a pressure rod whose lower end extends into the test cylinder through the eccentric position of the eccentric adjusting disk, and a connecting joint is constructed at the lower end of the pressure rod, and the connecting joint is detachably connected to a pressure head; a distribution chamber is formed between the connecting joint and the pressure head, and a plurality of conducting holes connected to the distribution chamber are spaced apart on the pressure head, and a first conducting channel and a second conducting channel connected to the distribution chamber are opened on the pressure rod, and the first conducting channel and the second conducting channel are respectively connected to a first connecting hose and a second connecting hose, and a first control valve and a second control valve are respectively installed on the first connecting hose and the second connecting hose; the upper end of the pressure rod is connected to the cylinder rod of the hydraulic cylinder, and a transfer ear rotatably connected to the vertical rod is constructed on the cylinder body of the hydraulic cylinder, an operating hand wheel is installed on the vertical rod, and each lifting mechanism is connected to the corresponding vertical rod.

[0034] Since the present invention adopts the above structure, compared with the prior art, the technical progress achieved is that: the present invention uses activated carbon particles to improve the water retention capacity of foamed concrete, and ceramic particles are used to improve the anti-knock and pressure resistance of foamed concrete, and improve the wear resistance. The present invention mixes the components in the above formula into a fluid form by mixing and stirring. During the stirring process, the foaming agent reacts to foam and generate heat. Since the ceramic particles are homogenized during stirring, the ceramic particles have good thermal conductivity, so that the heat of the entire mixture is evenly distributed, thereby ensuring that the foaming reaction of different areas of the paved road or the prepared permeable bricks is uniform, and the overall texture is the same after hardening, and there will be no deviation in local performance. Moreover, due to the use of activated carbon particles, before stirring, the activated carbon particles are pre-soaked in water so that the activated carbon particles are fully washed with water. After that, the activated carbon particles are mixed with other components. During the foaming reaction, the water in the activated carbon particles is heated and gradually precipitated, so that a micro-foaming area is formed in the area around the activated carbon particles. In this way, pores will be generated around the activated carbon particles, which improves the water retention performance of the subsequent finished product, that is, water can smoothly penetrate from the pavement or the surface of the permeable brick to the activated carbon particles, and be absorbed by the activated carbon particles, so as to be gradually released in a dry environment. After the components are completely mixed, the present invention is poured on the pavement, or poured into a mold to make a permeable brick. The present invention tests the different properties of the test sample through a special testing device, that is, the water permeability, air permeability, compression resistance and wear resistance of the test sample are tested to ensure that the product prepared by the formula of the present invention has extremely high performance. In summary, the present invention enables the obtained foam concrete to be applied to road paving, and can be prepared into permeable bricks for paving on pedestrian walkways. It has extremely high strength, good water seepage and water retention capabilities, can effectively avoid road cracking, and ensure the safety of vehicles and pedestrians. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0036] In the attached picture:

[0037] Figure 1 It is a structural schematic diagram of a testing device according to an embodiment of the present invention;

[0038] Figure 2 It is a schematic structural diagram of the testing device according to another embodiment of the present invention from another angle;

[0039] Figure 3 A partial structural cross-sectional view of a test sample of an embodiment of the present invention assembled in a test cylinder;

[0040] Figure 4 It is a schematic structural diagram of the corresponding arrangement of the test tube, the driving mechanism and the annular adapter according to an embodiment of the present invention;

[0041] Figure 5 It is an axial structural cross-sectional view of a testing device according to an embodiment of the present invention;

[0042] Figure 6 for Figure 5 A magnified view of the structure of the middle A part;

[0043] Figure 7 for Figure 5 A magnified view of the structure of the middle B area;

[0044] Figure 8 It is a structural schematic diagram of the connection between the upper connecting cover, the pressure-applying grinding mechanism and the lifting mechanism in an embodiment of the present invention;

[0045] Fig. 9 It is a schematic diagram of the structure after the upper connecting cover and the lifting mechanism are separated according to an embodiment of the present invention;

[0046] Fig.10 This is a schematic diagram of the structure of the upper connecting cover and the eccentric adjusting disk connected in an embodiment of the present invention;

[0047] Fig.11 It is a schematic diagram of the structure of the pressure-type grinding mechanism after being disassembled according to an embodiment of the present invention.

[0048] Labeled parts: 100-test cylinder, 101-cylindrical body, 102-adapter flange, 103-receiving flange, 104-upper test cavity, 105-lower test cavity, 106-upper identification scale, 107-lower identification scale, 200-annular adapter, 201-semi-ring, 202-connecting ear, 203-semi-ring groove, 204-fixing ear, 300-upper connecting cover, 301-first cover-like body, 302-first joint pipe, 303-trachea joint, 304-first pressure gauge, 305-circular assembly port, 306-eccentric adjustment disk, 307-guide sleeve, 308-vertical rod, 309-operating hand wheel, 310-fixing column, 400-lower connecting cover, 401-second cover-like body, 402-second joint pipe, 4 03-the second pressure gauge, 500-driving mechanism, 501-driving motor, 502-output shaft, 503-driving wheel, 504-driven wheel, 505-transmission belt, 600-pressure-applying grinding mechanism, 601-cylinder body, 602-adapting ear, 603-cylinder rod, 604-pressure-applying rod, 605-the first conducting channel, 606-the second conducting channel, 607-the first connecting hose, 608-the second connecting hose, 609-the first control valve, 610-the second control valve, 611-connecting joint, 612-pressure-applying head, 613-conducting hole, 614-distribution chamber, 700-lifting mechanism, 701-vertical cylinder, 702-adapting arm, 703-connecting sleeve, 704-locking bolt, 800-test sample. DETAILED DESCRIPTION

[0049] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0050] The present invention discloses a high-performance foam concrete formula, which comprises, by weight ratio:

[0051] 100-120 parts of cement

[0052] Aggregate 42-48 parts

[0053] Admixture 26-32 parts

[0054] 81-95 parts water

[0055] Activated carbon granules 9-11 parts

[0056] Ceramic particles 12-18 parts

[0057] 2-4 parts of foaming agent.

[0058] As a preferred embodiment of the present invention, the aggregate includes sand and gravel with a particle size of 1.2-2 mm, the admixture includes slag powder and fly ash powder, the particle size of the activated carbon particles is 1.2-2.2 mm, and the particle size of the ceramic particles is 1.6-2.4 mm.

[0059] The advantages of the present invention are as follows: the present invention uses activated carbon particles to improve the water retention capacity of foamed concrete, and ceramic particles are used to improve the anti-knock and anti-compression performance of foamed concrete, and improve the wear resistance. The present invention mixes the components in the above formula into a fluid form by mixing and stirring. During the stirring process, the foaming agent reacts to foam and generate heat. Since the ceramic particles are homogenized during stirring, the ceramic particles have good thermal conductivity, so that the heat of the entire mixture is evenly distributed, thereby ensuring that the foaming reaction of different areas of the paved road surface or the prepared permeable bricks is uniform, and the overall texture is the same after hardening, and there will be no deviation in local performance. Moreover, due to the use of activated carbon particles, before stirring, the activated carbon particles are pre-soaked in water so that the activated carbon particles are fully washed with water, and then the activated carbon particles are mixed with other components. During the foaming reaction, the water in the activated carbon particles is heated and gradually precipitated, so that the area around the activated carbon particles forms a micro-foaming area. In this way, pores are generated around the activated carbon particles, which improves the water retention performance of the subsequent finished product, that is, water can smoothly penetrate from the road surface or the surface of the permeable brick to the activated carbon particles and be absorbed by the activated carbon particles so as to be gradually released in a dry environment. After the components are completely mixed, the present invention is poured on the road surface, or poured into a mold to make a permeable brick.

[0060] The present invention also discloses a performance testing method of the high-performance foamed concrete, comprising the following steps:

[0061] Water penetration test

[0062] Step 1. Place the test sample 800 in the middle of the test cylinder 100 and separate the upper test chamber 104 and the lower test chamber 105 , and use one of the pressure-applying grinding mechanisms 600 to press the test sample 800 so that the test sample 800 is firmly fixed in the middle of the test cylinder 100 ;

[0063] Step 2. Inject water into the upper test chamber 104 of the test tube 100 and perform the test by self-pressure or pressurization;

[0064] Step 3. Detect the amount of water entering the lower test chamber 105 within a predetermined time;

[0065] Step 4. Analyze the water permeability of the test sample 800 by the amount of water in the lower test chamber 105;

[0066] Air permeability test

[0067] S1. Place the test sample 800 in the middle of the test tube 100 and separate the upper test chamber 104 and the lower test chamber 105, and use one of the pressure-applying grinding mechanisms 600 to press the test sample 800, so that the test sample 800 is firmly fixed in the middle of the test tube 100;

[0068] S2. The high-pressure gas is introduced into the upper test chamber 104 so that the pressure in the upper test chamber 104 reaches a predetermined value;

[0069] S3. Within a predetermined time, the air pressure in the lower test chamber 105 is detected, and during this process, the pressure in the upper test chamber 104 is always maintained constant;

[0070] S4. By changing the pressure in the lower test chamber 105, the air permeability of the test sample 800 is analyzed;

[0071] Compression performance test

[0072] ①. Place the test sample 800 in the middle of the test tube 100, and use one of the pressure-applying grinding mechanisms 600 to press the test sample 800, so that the test sample 800 is firmly fixed in the middle of the test tube 100;

[0073] ② controlling another pressure-type grinding mechanism 600 to apply pressure or reciprocating impact to different positions of the test sample 800;

[0074] ③. Obtain the compressive limit value of the test sample 800, or obtain the impact fatigue limit value of the test sample 800;

[0075] Wear resistance test

[0076] (1) Place the test sample 800 in the middle of the test tube 100 and use one of the pressure-applying grinding mechanisms 600 to press the test sample 800 so that the test sample 800 is firmly fixed in the middle of the test tube 100;

[0077] (2) Controlling another pressure-applying grinding mechanism 600 to press against the other end surface of the test sample 800, or controlling another pressure-applying grinding mechanism 600 to separate from the test sample 800;

[0078] (3) Controlling the driving mechanism 500 to drive the test cylinder 100 to drive the test sample 800 to rotate, and the pressure-applying grinding mechanism 600 in contact with the end surface of the test sample 800 grinds the test sample 800;

[0079] (4) Within a predetermined time, the grinding is stopped, the test sample 800 is taken out, and the grinding depth is measured, thereby analyzing the wear resistance of the test sample 800.

[0080] The present invention tests different properties of the test sample 800 through a dedicated testing device, that is, tests the water permeability, air permeability, compressive resistance and wear resistance of the test sample 800, ensuring that the product prepared by the formula of the present invention has extremely high performance. In summary, the present invention enables the obtained foam concrete to be applied to road paving, and can be prepared into permeable bricks to be laid on pedestrian walkways, with extremely high strength, good water permeability and water retention capacity, which can effectively avoid road cracking and ensure the safety of vehicles and pedestrians.

[0081] The present invention also discloses a performance testing device for the high performance foam concrete. Figure 1-11As shown, it includes a test barrel 100, an annular adapter 200, an upper connection cover 300, a lower connection cover 400, a driving mechanism 500 and two pressure-type grinding mechanisms 600. The test barrel 100 is connected to the connecting frame through the annular adapter 200, and the test barrel 100 is rotatably connected to the annular adapter. The driving mechanism 500 is transmission-connected to the test barrel 100 and is used to drive the test barrel 100 to rotate. The upper connection cover 300 and the lower connection cover 400 are respectively installed at the upper and lower ends of the test barrel 100, one pressure-type grinding mechanism 600 extends into the test barrel 100 through the upper connection cover 300, and the other pressure-type grinding mechanism 600 extends into the test barrel 100 through the lower connection cover 400. The test cylinder 100 of this embodiment includes a vertically arranged cylindrical body 101, the radial cross-section of the inner wall of the cylindrical body 101 is a regular polygon, and the cross-section of the test sample 800 is a regular polygon adapted to the inner wall of the cylindrical body 101. In this way, in the process of driving the cylindrical body 101 to rotate, the cylindrical body 101 drives the test sample 800 to rotate synchronously. A receiving flange 103 is constructed in the middle of the cylindrical body 101, and the receiving flange 103 extends radially inwardly of the cylindrical body 101. The test sample 800 is arranged on the upper end surface of the receiving flange 103, and a sealing rubber ring is installed on the upper end surface of the receiving flange 103. When the upper pressure-type grinding mechanism 600 applies pressure to the test sample 800, the test sample 800 separates the inner cavity of the test cylinder 100 into an upper test cavity 104 and a lower test cavity 105, that is, the upper test cavity 104 and the lower test cavity 105 are formed above and below the test sample 800, respectively. An upper identification scale 106 and a lower identification scale 107 are marked on the outer wall of the cylindrical body 101, and the upper identification scale 106 and the lower identification scale 107 are respectively located at the upper test cavity 104 and the lower test cavity 105. The test tube 100 of this embodiment is a structure made of transparent material. By observing the upper marking scale 106 and the lower marking scale 107, the water volume in the upper test chamber 104 and the lower test chamber 105 can be judged, and then the water seepage and water holding capacity of the test sample 800 can be obtained. In the water seepage performance test of this embodiment, the self-pressure method is to add water into the upper test chamber 104, and under normal pressure, a part of the water enters the lower test chamber 105 through the test sample 800; the pressurization method is to add water into the upper test chamber 104, and then, the pressurized gas is introduced into the upper test chamber 104, so that the pressure in the upper test chamber 104 reaches a predetermined value, and the pressure in the upper test chamber 104 is maintained constant, and the water is pressurized and enters the lower test chamber 105 through the test sample 800. In this embodiment, one or two pressure-type grinding mechanisms 600 are pressed on one or both ends of the test sample 800, and then the driving mechanism 500 is controlled to operate so as to drive the test cylinder 100 to drive the test sample 800 to rotate, thereby achieving the purpose of the pressure-type grinding mechanism 600 grinding the surface of the test sample 800, thereby testing the wear resistance of the test sample 800.

[0082] As a preferred embodiment of the present invention, Figure 3 , 4 As shown, an adapter flange 102 is constructed on the outer wall of the test cylinder 100, and the adapter flange 102 extends outward along the radial direction of the test cylinder 100. The annular adapter seat 200 of this embodiment includes two oppositely arranged semi-ring members 201, and a semi-ring groove 203 is opened on the arc-shaped wall of each semi-ring member 201 close to the test cylinder 100. Connecting ears 202 are respectively constructed on the two free ends of the semi-ring members 201. The corresponding connecting ears 202 of the two semi-ring members 201 are connected and fixed by fastening bolts, and the two semi-ring members 201 are rotatably buckled on the adapter flange 102. A fixing ear 204 is constructed at one end of the two semi-ring members 201 away from each other, and each fixing ear 204 is fixedly connected to the corresponding part of the connecting frame. The driving mechanism 500 of this embodiment includes a driving motor 501, on which an output shaft 502 of the driving motor 501 is coaxially mounted a driving wheel 503, and on the outside of the test cylinder 100 is coaxially mounted a driven wheel 504, and the driving wheel 503 and the driven wheel 504 are connected by a transmission belt 505; in this embodiment, the driving motor 501 is controlled to rotate, so that the driving wheel 503, the driven wheel 504 and the transmission belt 505 drive the test cylinder 100 to rotate.

[0083] As a preferred embodiment of the present invention, Fig. 9 , 10 As shown, the upper connection cover 300 includes a first cover-shaped body 301, on which a first joint pipe 302, an air pipe joint 303 and a first pressure gauge 304 are installed. The first joint pipe 302 and the air pipe joint 303 are both connected to the upper test cavity 104. Figure 2As shown, the upper connecting cover 300 includes a second cover-like body 401, on which a second joint pipe 402 and a second pressure gauge 403 are installed, and the second joint pipe 402 is connected to the lower test chamber 105. In addition, a control valve is installed on the first joint pipe 302, the air pipe joint 303 and the second joint pipe 402. In this embodiment, circular assembly ports 305 are respectively provided in the first cover-like body 301 and the first cover-like body 301, and the center line of each circular assembly port 305 deviates from the center line of the corresponding first cover-like body 301 or the second cover-like body 401. An eccentric adjustment disk 306 is rotatably connected in each circular assembly port 305, and each pressure-applying grinding mechanism 600 extends into the test cylinder 100 through the corresponding eccentric adjustment disk 306, and each eccentric adjustment disk 306 is connected to the annular adapter 200 through a lifting mechanism 700. In this embodiment, the lifting mechanism 700 is controlled to drive the eccentric adjustment disk 306 to drive the corresponding first cover body 301 or the second cover body 401 to move closer to or away from the test cylinder 100, thereby achieving the purpose of sealing the first cover body 301 or the second cover body 401 on the axial end of the test cylinder 100, or opening the axial end of the test cylinder 100, thereby achieving the purpose of taking and placing the test sample 800.

[0084] As a preferred embodiment of the present invention, Figure 5-11As shown, the pressure-type grinding mechanism 600 includes a pressure rod 604, a connecting joint 611, a pressure head 612 and a hydraulic cylinder. Among them, a guide sleeve 307 is configured at the eccentric position of the eccentric adjustment disk 306, a fixing column 310 is configured at the center of the eccentric adjustment disk 306, the lower end of the pressure rod 604 passes through the eccentric adjustment disk 306 through the guide sleeve 307 and extends into the test cylinder 100, the connecting joint 611 is configured at the lower end of the pressure rod 604, and the pressure head 612 and the connecting joint 611 are detachably connected together. In this embodiment, a distribution chamber 614 is formed between the connecting joint 611 and the pressure head 612, and a plurality of conducting holes 613 are spaced apart on the pressure head 612, and these conducting holes 613 are all connected to the distribution chamber 614. A first conducting channel 605 and a second conducting channel 606 are provided in the pressure rod 604, and the first conducting channel 605 and the second conducting channel 606 are both connected to the distribution chamber 614; a first connecting hose 607 and a second connecting hose 608 are installed on the pressure rod 604, and the first connecting hose 607 and the second connecting hose 608 are respectively connected to the first conducting channel 605 and the second conducting channel 606, and a first control valve 609 and a second control valve 610 are respectively installed on the first connecting hose 607 and the second connecting hose 608, and high-pressure gas or high-pressure water enters the distribution chamber 614 after passing through the first connecting hose 607 and the first conducting channel 605, and the opening of the second control valve 610 on the second connecting hose 608 is controlled according to demand. In this embodiment, the upper end of the pressure rod 604 is connected to the cylinder rod 603 of the hydraulic cylinder. A transfer ear 602 is constructed on the cylinder body 601 of the hydraulic cylinder. The transfer ear 602 is rotatably connected to the vertical rod 308. An operating hand wheel 309 is installed on the vertical rod 308, and each lifting mechanism 700 is connected to the corresponding vertical rod 308. Specifically, the lifting mechanism 700 includes a vertical cylinder 701, one end of which is connected to the corresponding fixing ear 204 on the annular adapter 200, and the other end of the vertical cylinder 701 is connected to the adapter arm 702, on which a connecting sleeve 703 is constructed, the lower end of the vertical rod 308 is fixedly connected to the fixing column 310, the upper end of the vertical rod 308 movably passes through the connecting sleeve 703, and a locking bolt 704 is threadedly connected to the connecting sleeve 703, and the locking bolt 704 is screwed to lock the position of the vertical rod 308 and the connecting sleeve 703 by tightening the locking bolt 704. The working principle and advantage of this embodiment are: this embodiment controls the action of the vertical cylinder 701, so that it drives the first cover-like body 301 or the second cover-like body 401 to move vertically through the adapter arm 702 and the eccentric adjustment disk 306, thereby realizing the opening and closing of the axial end of the test cylinder 100, so as to facilitate the replacement of the test sample 800.This embodiment can adjust the distance of the pressure-type grinding mechanism 600 from the center of the first cover-like body 301 or the second cover-like body 401, thereby realizing the pressurized water penetration test at different positions of the test sample 800, or the wear resistance test at different positions of the test sample 800. Specifically, the locking bolt 704 is loosened, and the operating hand wheel 309 is rotated to drive the eccentric adjustment disk 306 to rotate through the vertical rod 308, so that the eccentric adjustment disk 306 drives the pressure rod 604 to rotate a certain angle along the axis of the vertical rod 308, thereby adjusting the distance of the pressure rod 604 from the center of the first cover-like body 301 or the second cover-like body 401, and after the adjustment is completed, the locking bolt 704 is tightened. At this time, the pressure head 612 is aligned with the eccentric position of the test sample 800, and then high-pressure gas or high-pressure water is introduced into the distribution chamber 614, and the high-pressure gas or high-pressure water acts on the test sample 800 through the conduction hole 613, thereby testing the air permeability or water permeability of the test sample 800 at this position. In this embodiment, the test cylinder 100 can also be driven to rotate, so that the pressure head 612 grinds the eccentric position of the test sample 800, and during the grinding process, water is introduced into the distribution chamber 614 through the first conduction channel 605, part of the water flows to the surface of the test sample 800, and the other part of the water is discharged through the second conduction channel 606 and the second connecting hose 608, so as to achieve the purpose of cooling the pressure head 612, and at the same time as testing the wear resistance of the test sample 800, the service life of the pressure head 612 is increased. In this embodiment, the pressure limit test of the test sample 800 or the impact fatigue test of the test sample 800 is achieved by controlling the hydraulic cylinder to continuously apply pressure to the test sample 800, or to apply pressure intermittently and reciprocally.

[0085] As a preferred embodiment of the present invention, in the compression resistance test, when the continuous pressure method is used, the pressure when the 10cm thick test sample 800 is broken or fractured is the compression resistance limit value of the test sample 800; when the reciprocating impact method is used, the test is performed according to the predetermined impact force, the number of impacts is recorded, and the 10cm thick test sample 800 is broken as the impact fatigue limit value. Since the thickness of 10cm is the thickness of the permeable brick, or the foundation thickness of the upper surface layer of the road paving, its reference is more realistic.

[0086] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A performance testing method for high performance foam concrete, characterized in that: The steps include: Water penetration test Step 1. Place the test sample in the middle of the test cylinder and separate the upper test chamber and the lower test chamber, and use one of the pressure-applying grinding mechanisms to press the test sample so that the test sample is firmly fixed in the middle of the test cylinder; Step 2. Inject water into the upper test chamber of the test tube and perform the test by self-pressure or pressurization; Step 3. Detect the amount of water entering the lower test chamber within a predetermined time; Step 4. Analyze the water permeability of the test sample by the amount of water in the lower test cavity; Air permeability test S1. Place the test sample in the middle of the test tube and separate the upper test chamber and the lower test chamber, and use one of the pressure-applying grinding mechanisms to press the test sample so that the test sample is firmly fixed in the middle of the test tube; S2. The high-pressure gas is introduced into the upper test chamber so that the pressure in the upper test chamber reaches a predetermined value; S3. Detect the air pressure in the lower test chamber within a predetermined time, and in this process, always maintain a constant pressure in the upper test chamber; S4. Analyze the air permeability of the test sample by the pressure change in the lower test chamber; Compression performance test ①. Place the test sample in the middle of the test tube, and use one of the pressure-type grinding mechanisms to press the test sample so that the test sample is firmly fixed in the middle of the test tube; ②. Control another pressure-type grinding mechanism to apply pressure or reciprocating impact to different positions of the test sample; ③. Obtain the compressive limit value of the test sample, or obtain the impact fatigue limit value of the test sample; Wear resistance test (1) Place the test sample in the middle of the test tube and use one of the pressure-applying grinding mechanisms to press the test sample so that the test sample is firmly fixed in the middle of the test tube; (2) Controlling another pressure-type grinding mechanism to press against the other end surface of the test sample, or controlling another pressure-type grinding mechanism to separate from the test sample; (3) Control the driving mechanism to drive the test tube to rotate the test sample, and the pressure-type grinding mechanism in contact with the end surface of the test sample grinds the test sample; (4) Within a predetermined time, stop grinding, take out the test sample, and measure the grinding depth to analyze the wear resistance of the test sample; The test cylinder is connected to the connecting frame through an annular adapter, and the test cylinder is rotatably connected to the annular adapter, the driving mechanism is transmission-connected to the test cylinder, an upper connecting cover and a lower connecting cover are respectively installed at the upper and lower ends of the test cylinder, and the two pressure-type grinding mechanisms are respectively extended into the test cylinder through the upper connecting cover and the lower connecting cover; circular assembly openings are respectively opened in the upper connecting cover and the lower connecting cover, and the center line of each circular assembly opening deviates from the center line of the corresponding upper connecting cover or the lower connecting cover, and an eccentric adjustment disk is rotatably connected in each circular assembly opening, and each pressure-type grinding mechanism is extended into the test cylinder through the corresponding eccentric adjustment disk, and each eccentric adjustment disk is connected to the annular adapter through a lifting mechanism; the pressure-type grinding mechanism includes a lower end extending into the eccentric position of the eccentric adjustment disk A pressure rod in the test cylinder is provided with a connecting joint at the lower end of the pressure rod, and the connecting joint is detachably connected to a pressure head; a distribution chamber is formed between the connecting joint and the pressure head, and a plurality of conducting holes connected to the distribution chamber are spaced apart on the pressure head; a first conducting channel and a second conducting channel connected to the distribution chamber are provided on the pressure rod, and the first conducting channel and the second conducting channel are respectively connected to a first connecting hose and a second connecting hose, and a first control valve and a second control valve are respectively installed on the first connecting hose and the second connecting hose; the upper end of the pressure rod is connected to the cylinder rod of the hydraulic cylinder, and a transfer ear rotatably connected to the vertical rod is constructed on the cylinder body of the hydraulic cylinder, an operating hand wheel is installed on the vertical rod, and each lifting mechanism is connected to the corresponding vertical rod.

2. A performance testing method for high performance foamed concrete according to claim 1, characterized in that: In the water permeability test, the self-pressure method is to add water into the upper test chamber, and under normal pressure, a part of the water enters the lower test chamber through the test sample; the pressurized method is to add water into the upper test chamber, and then, pressurized gas is passed into the upper test chamber so that the pressure in the upper test chamber reaches a predetermined value and maintains a constant pressure in the upper test chamber, and the water is pressurized and enters the lower test chamber through the test sample.

3. The performance testing method of high performance foamed concrete according to claim 1, characterized in that: In the compressive performance test, when the continuous pressure method is used, the pressure when the 10cm thick test sample is broken or fractured is the compressive limit value of the test sample; when the reciprocating impact method is used, the test is carried out according to the predetermined impact force, and the number of impacts is recorded. The impact fatigue limit value is the pressure at which the 10cm thick test sample is crushed.

4. The performance testing method of high performance foamed concrete according to claim 1, characterized in that: The test cylinder includes a vertically arranged cylindrical body, the radial cross-section of the inner wall of the cylindrical body is a regular polygon, the cross-section of the test sample is a regular polygon matched with the inner wall of the cylindrical body, a receiving flange extending radially inward is constructed in the middle of the cylindrical body, the test sample is arranged on the upper end surface of the receiving flange, and an upper test cavity and a lower test cavity are formed above and below the test sample, and an upper identification scale and a lower identification scale are marked on the outer wall of the cylindrical body, and the upper identification scale and the lower identification scale are respectively located at the upper test cavity and the lower test cavity.

5. The performance testing method of high performance foamed concrete according to claim 1, characterized in that: An adapter flange extending radially outward is constructed on the outer wall of the test cylinder, and the annular adapter seat includes two oppositely arranged semi-ring parts, a semi-ring groove is opened on the arc-shaped wall on one side of each semi-ring part close to the test cylinder, and connecting ears are respectively constructed on the two free ends of the semi-ring parts. The corresponding connecting ears of the two semi-ring parts are connected and fixed by fastening bolts, and the two semi-ring parts are rotatably buckled on the adapter flange, and a fixing ear is constructed at one end of the two semi-ring parts away from each other, and each of the fixing ears is fixed to the connecting frame.

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