Method for detecting internal hardness and strength of aerated concrete blank and speed insertion rod for detection

Abstract

The application provides a method for detecting the internal hardness and strength of aerated concrete blanks and a speed insertion rod for detection, and relates to the technical field of aerated concrete performance detection. The detection method is based on the average falling speed of the speed insertion rod under aerated concrete blanks with different hardness and strength, and fittingly establishes the falling speed-hardness relationship curve and the falling speed-strength relationship curve of the speed insertion rod. Then, the speed insertion rod is used to detect the aerated concrete blanks to be measured, and the speed data of the speed insertion rod at different falling heights in the blanks are brought into the falling speed-hardness relationship curve and the falling speed-strength relationship curve of the speed insertion rod, so as to obtain the hardness and strength data of the aerated concrete blanks to be measured at different falling height positions. The above detection method has the advantages of simplicity and strong applicability, and can detect the hardness and strength of the aerated concrete blanks at any position in the three-dimensional space through the selection of the falling position of the speed insertion rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aerated concrete performance detection, in particular to a detection method for the internal hardness and strength of aerated concrete green body and a speed insertion rod for detection. BACKGROUND

[0002] Aerated concrete is a lightweight, heat-insulating, fireproof and heat-insulating building material, which is widely used in civil buildings, commercial buildings, industrial buildings, etc. In the preparation process of aerated concrete, it usually needs to go through processes such as pouring, static curing, cutting, autoclave curing, etc. Among them, cutting is the key factor to ensure the size accuracy of aerated concrete. In the cutting process, the hardness of the green body directly affects the cutting effect. In the industrial production process, after the aerated concrete green body is poured, the digestion of lime and the hydration of cement in the hardening process of the green body will continue to release heat, resulting in a large temperature difference between the inside and outside of the large-volume green body. Temperature has a direct impact on the development of green body hardness and strength. The higher the temperature, the faster the green body hardens and the higher the strength, and vice versa.

[0003] Therefore, the hardness and strength of the green body at different positions at the same time during the hardening process of the green body are different, and the change of the hardness and strength at different positions has an important role in exploring the hardening rule of the green body and ensuring the quality of aerated concrete. There are some detection devices or instruments designed for the hardness of aerated concrete in the prior art, but they all have certain defects. For example:

[0004] Patent CN211697328U discloses a green body hardness detection device, which comprises a device body, the device body comprises a contact part, a connecting part, a metering part and a handle, the contact part is a cone, the connecting part is connected with the contact part and the metering part at both ends, the outer wall of the metering part is provided with a scale for indicating the hardness value, and the outer wall of the metering part is provided with a scale ring; the handle has an inner cavity, one end of which is open and the other end is closed, one end of the metering part is connected with the connecting part, and the other end of the metering part extends into the inner cavity of the handle, the inner cavity of the handle is provided with a spring, and the spring is located between the extending end of the metering part and the closed end of the handle. The device can effectively obtain the hardness of aerated concrete before cutting, and provide a reliable reference basis for grasping the cutting time.

[0005] The patent CN215574399U discloses a hardness tester for aerated concrete production, relates to the technical field of aerated concrete blank hardness testing, and solves the problem of low flexibility of the existing hardness tester due to its simple structure and inconvenient adjustment. The upper side of the base is provided with a mounting frame, a gas cylinder is arranged between the rear end of the mounting frame and the base, connecting seats are arranged on both sides of the mounting frame, a sliding sleeve is arranged in the connecting seat, a supporting rod is arranged in the sliding sleeve, the supporting rod passes through the sliding sleeve and is welded to the base, a measuring cylinder is arranged on the inner side of the front end of the mounting frame, clamping pieces are arranged on both sides of the upper end of the measuring cylinder, a measuring rod is arranged on the inner side of the measuring cylinder, and positioning pieces are arranged on both sides of the lower end of the measuring cylinder.

[0006] However, the detection methods disclosed in the above-mentioned patent CN211697328U and patent CN215574399U can only detect the hardness of a certain point on the surface of the aerated concrete blank, and cannot detect the hardness inside the aerated concrete blank.

[0007] For example, the patent CN116929973B discloses an aerated concrete blank hardness detection device, which comprises a pressure balance mechanism and a pushing mechanism mounted on the pressure balance mechanism. The first column, the second column, the third column and the fourth column in the form of a pyramid structure are movably installed in the reinforced outer cylinder, and four racks with different lengths are installed on the top of the first column, the second column, the third column and the fourth column. The four racks are meshed and driven by the four gear shafts movably installed in the middle of the reinforced outer cylinder. When the combined base, the deflection end and the expansion and clamping force arm on both sides of the prefabricated mold suspend the reinforced outer cylinder on the top of the prefabricated mold, the pressure-bearing assembly pushed downward by the two main inclined plates can detect the multi-layer strength and hardness of the blank. However, although the patent CN116929973B can detect the hardness inside the aerated concrete blank, the device structure is complex, the cost is high, and it is difficult to detect the industrial-grade aerated concrete blank with large volume.

[0008] In addition, the existing patent technology mainly designs instruments and devices for detecting the hardness of aerated concrete blanks, and involves less detection methods, especially for industrial-grade aerated concrete blanks with large volume, an effective method for detecting the hardness and strength of aerated concrete blanks at any position in three-dimensional space is needed.

[0009] Therefore, the present application is proposed. SUMMARY

[0010] The first object of the present application is to provide a method for detecting the internal hardness and strength of aerated concrete blank, which detects the internal hardness and strength of aerated concrete blank by fitting the relationship curve, has the advantages of simple detection method and strong applicability, and can detect the hardness and strength of aerated concrete blank at any position in three-dimensional space through the selection of the falling position of the speed inserting rod, thereby providing a new idea for the determination of the internal hardness and strength of large-volume aerated concrete blank.

[0011] The second object of the present application is to provide a speed inserting rod for detecting the internal hardness and strength of aerated concrete blank.

[0012] In order to achieve the above object of the present application, the following technical solutions are adopted:

[0013] The present application provides a method for detecting the internal hardness and strength of aerated concrete blank, which comprises:

[0014] Based on the average falling speed of the speed inserting rod under different hardness and strength aerated concrete blanks, the relationship curve of the falling speed of the speed inserting rod and the hardness, and the relationship curve of the falling speed of the speed inserting rod and the strength are fitted and established;

[0015] The speed inserting rod is used to detect the aerated concrete blank to be tested, and the speed data of the speed inserting rod at different falling heights in the blank is recorded, the speed data is brought into the relationship curve of the falling speed of the speed inserting rod and the hardness, and the relationship curve of the falling speed of the speed inserting rod and the strength, and the hardness and strength data of the aerated concrete blank to be tested at different falling height positions are obtained.

[0016] Further, the fitting and establishing method of the relationship curve of the falling speed of the speed inserting rod and the hardness, and the relationship curve of the falling speed of the speed inserting rod and the strength comprises:

[0017] (A) aerated concrete is stirred and poured to form aerated concrete blanks with different hardness and strength;

[0018] (B) the average falling speed of the inserting rod from the surface to the bottom of the blank is measured by using the speed inserting rod to determine the average falling speed of the inserting rod of the blank with different hardness, which is recorded as falling speed A;

[0019] The falling speed A of the inserting rod measured by the speed inserting rod at each hardness is taken as the abscissa, and the hardness of the blank is taken as the ordinate, and the relationship curve of the falling speed and the hardness is established;

[0020] (C) the average falling speed of the inserting rod from the surface to the bottom of the blank is measured by using the speed inserting rod to determine the average falling speed of the inserting rod of the blank with different strength, which is recorded as falling speed B;

[0021] The descending speed B of the inserting rod measured at each hardness is taken as the horizontal coordinate, and the strength of the blank is taken as the vertical coordinate to establish a descending speed-strength relation curve.

[0022] Further, the step (A) different hardness and strength aerated concrete blank is prepared by blank curing.

[0023] The blank curing time is 20-240 min.

[0024] Further, the blank curing temperature is 45-60 DEG C, and the humidity is 80-100%.

[0025] Further, the detection method further comprises the step of obtaining the internal hardness and strength variation curve of the to-be-detected aerated concrete blank by using the hardness and strength data of different descending height positions in the to-be-detected aerated concrete blank.

[0026] The detection speed inserting rod provided by the application comprises a long rectangular channel steel, a concave bearing, a steel inserting rod and an inserting rod speed monitoring device.

[0027] The concave bearing comprises a first outer ring concave groove bearing and a second outer ring concave groove bearing, which are slidably arranged in the long rectangular channel steel and are perpendicular to the long side of the long rectangular channel steel in the axial direction.

[0028] The first outer ring concave groove bearing and the second outer ring concave groove bearing are adjacently arranged, and the adjacent concave grooves of the two bearings form a cylindrical hole, the steel inserting rod is inserted from the cylindrical hole, and the diameter of the steel inserting rod is the same as that of the cylindrical hole.

[0029] The inserting rod speed monitoring device is arranged on the long rectangular channel steel and is used for monitoring the descending speed of the steel inserting rod.

[0030] Further, the inserting rod speed monitoring device is an electric laser speed monitoring device.

[0031] Further, the surface of the steel inserting rod is coated with a fluorocarbon coating.

[0032] Further, the long rectangular channel steel is provided with a fixing clamping groove for fixing the to-be-detected aerated concrete blank.

[0033] Compared with the prior art, the application has the following beneficial effects:

[0034] The application provides a detection method for the internal hardness and strength of aerated concrete blanks, which comprises the following steps: fitting a relationship curve between the falling speed of a speed insertion rod and the hardness and strength of aerated concrete blanks with different hardness and strength, and then detecting the aerated concrete blanks to be measured by using the speed insertion rod, recording the speed data of the speed insertion rod at different falling heights in the blanks, and then inputting the speed data into the relationship curve between the falling speed of the speed insertion rod and the hardness and strength to obtain the hardness and strength data of the aerated concrete blanks at different falling heights in the blanks. The detection method provided by the application can detect the internal hardness and strength of aerated concrete blanks by fitting the relationship curve, and has the advantages of simple detection method and strong applicability. Moreover, the hardness and strength of aerated concrete blanks at any position in the three-dimensional space can be detected by selecting the falling position of the speed insertion rod, thereby providing a new method for measuring the internal hardness and strength of large-volume aerated concrete blanks.

[0035] The application provides a detection speed insertion rod, which comprises a long rectangular channel steel, a concave bearing, a steel insertion rod and an insertion rod speed monitoring device. The concave bearing comprises a first outer ring concave bearing and a second outer ring concave bearing, which are slidably arranged in the long rectangular channel steel and adjacent to each other. The adjacent concave grooves of the two bearings form a cylindrical hole, the steel insertion rod is inserted from the cylindrical hole, and the diameter of the steel insertion rod is the same as that of the cylindrical hole. The cylindrical hole formed by the first outer ring concave bearing and the second outer ring concave bearing controls the falling position of the steel insertion rod. During the falling process of the steel insertion rod, the falling speed of the steel insertion rod is detected by using the insertion rod speed monitoring device, and the falling speed of the steel insertion rod is monitored. Therefore, the falling speed of the steel insertion rod at different positions of the aerated concrete blank can be monitored by adjusting the falling position of the steel insertion rod. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0037] Fig. 1 The structure schematic front view of the detection speed insertion rod provided for the embodiment 1 of the application is shown in the figure.

[0038] Fig. 2 The structure schematic top view of the detection speed insertion rod provided for the embodiment 1 of the application is shown in the figure.

[0039] Fig. 3 The long rectangular groove steel structure schematic diagram of the speed insertion rod for detection provided for embodiment 1 of the present application.

[0040] Icon: 1-long rectangular groove steel; 2-concave bearing; 21-first outer ring groove bearing; 22-second outer ring groove bearing; 3-insertion rod speed monitoring device; 31-electric laser speed monitoring device; 4-fixed clamping groove; 5-steel insertion rod; 6-fluorocarbon coating. DETAILED DESCRIPTION

[0041] The technical solutions of the present application will be described clearly and completely below in combination with embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] According to one aspect of the present application, a method for detecting the internal hardness and strength of aerated concrete blank, the detection method comprises:

[0043] Based on the average descending speed of the speed insertion rod under different hardness and strength aerated concrete blanks, the descending speed-insertion rod-hardness curve and the descending speed-insertion rod-strength curve are fitted and established;

[0044] The speed insertion rod is used to detect the aerated concrete blank to be tested, and the speed data of the speed insertion rod at different descending heights in the blank is recorded. The speed data is brought into the descending speed-insertion rod-hardness curve and the descending speed-insertion rod-strength curve, so as to obtain the hardness and strength data of different descending height positions in the aerated concrete blank to be tested.

[0045] The application provides a detection method for the internal hardness and strength of aerated concrete blanks, which comprises the following steps: fitting and establishing a relationship curve of the falling speed of a speed insertion rod and the hardness and a relationship curve of the falling speed of the speed insertion rod and the strength according to the average falling speed of the speed insertion rod under aerated concrete blanks with different hardness and strength; then detecting the aerated concrete blank to be measured by using the speed insertion rod, recording the speed data of the speed insertion rod at different falling heights in the blank, and then bringing the speed data into the relationship curve of the falling speed of the speed insertion rod and the hardness and the relationship curve of the falling speed of the speed insertion rod and the strength to obtain the hardness and strength data of the aerated concrete blank to be measured at different falling height positions in the blank. The detection method provided by the application has the advantages of simple detection method and strong applicability, and the hardness and strength of the aerated concrete blank at any position in the three-dimensional space can be detected by selecting the falling position of the speed insertion rod, thereby providing a new idea for the determination of the internal hardness and strength of large-volume aerated concrete blanks.

[0046] In a preferred embodiment of the application, the fitting and establishing method of the relationship curve of the falling speed of the speed insertion rod and the hardness and the relationship curve of the falling speed of the speed insertion rod and the strength comprises:

[0047] (A) mixing and pouring the aerated concrete, and preparing aerated concrete blanks with different hardness and strength through blank curing;

[0048] In the above preferred embodiment, the mixing and pouring of the aerated concrete refers to:

[0049] After the aerated concrete is mixed according to the proportion, the aerated concrete is respectively poured into a 50cm*50cm*60cm mold and a plurality of 10cm*10cm*10cm molds. In the 50cm*50cm*60cm mold, the gas generation height of the aerated concrete after gas generation is controlled to be 5-8cm by adjusting the amount of slurry, and in the 10cm*10cm*10cm mold, the gas generation height of the aerated concrete after gas generation is controlled to be 10cm by adjusting the amount of slurry.

[0050] In the above preferred embodiment, the blank curing refers to:

[0051] The blank after gas generation is placed in the mold together with the mold in an environment with a temperature of 45-60℃ and a humidity of 80-100%, and the blank curing time is prolonged to make the blank have different hardness and strength.

[0052] (B) determining the average falling speed of the insertion rod from the surface to the bottom of the blank with different hardness by using the speed insertion rod, and recording the falling speed A; taking the falling speed A of the insertion rod determined by the above speed insertion rod at each hardness as the abscissa and the hardness of the blank as the ordinate to establish the relationship curve of the falling speed and the hardness.

[0053] (C) using the speed insertion rod to measure the average descending speed of the insertion rod from the surface to the bottom of the blank of different strength, and recording it as descending speed B; using the descending speed B of the insertion rod measured by the speed insertion rod at each hardness as the horizontal coordinate, and using the strength of the blank as the vertical coordinate to establish the descending speed-hardness curve.

[0054] In the above preferred embodiment, the method for establishing the descending speed-hardness curve and the descending speed-strength curve comprises data measurement and curve establishment.

[0055] The data measurement refers to the data measurement of the blanks of different hardness and strength obtained in step (A), that is, when the hardness of the blank is 90-110 HV, 190-210 HV, 290-310 HV, 390-410 HV and 490-510 HV respectively, the specific hardness data is measured by using a hardness tester, and the strength of the blank of 10 cm x 10 cm x 10 cm is measured by using a press.

[0056] After the hardness data is tested by the hardness tester, the average speed of the insertion rod from the surface to the bottom of the blank is immediately measured by using the speed insertion rod.

[0057] The curve establishment refers to using the descending speed of the insertion rod measured by the speed insertion rod at each hardness as the horizontal coordinate, using the specific hardness measured by the hardness tester as the vertical coordinate, and establishing the descending speed-hardness curve through relational expression fitting. Using the descending speed of the insertion rod measured by the speed insertion rod at each hardness as the horizontal coordinate, using the strength measured by the press as the vertical coordinate, and establishing the descending speed-strength curve through relational expression fitting.

[0058] In a preferred embodiment of the present application, the detection method further comprises the step of obtaining the internal hardness and strength variation curve of the to-be-detected aerated concrete blank by using the hardness and strength data of different descending height positions inside the to-be-detected aerated concrete blank.

[0059] According to one aspect of the present application, the speed insertion rod for detection in the detection method comprises a long rectangular channel steel 1, a concave bearing 2, a steel insertion rod 5 and an insertion rod speed monitoring device 3.

[0060] The concave bearing 2 comprises a first outer ring concave groove bearing 21 and a second outer ring concave groove bearing 22, which are slidably arranged in the long rectangular channel steel 1, and the bearing axial direction is perpendicular to the long side of the long rectangular channel steel 1.

[0061] The first outer ring groove bearing 21 and the second outer ring groove bearing 22 are arranged adjacently, the adjacent grooves of the two bearings form a cylindrical hole, the steel inserting rod 5 is inserted from the cylindrical hole, and the diameter of the steel inserting rod 5 is the same as that of the cylindrical hole.

[0062] The inserting rod speed monitoring device 3 is arranged on the long rectangular channel steel 1 and is used for monitoring the falling speed of the steel inserting rod 5.

[0063] The speed inserting rod provided by the application comprises a long rectangular channel steel 1, a concave bearing 2, a steel inserting rod 5 and an inserting rod speed monitoring device 3, wherein the concave bearing 2 comprises a first outer ring groove bearing 21 and a second outer ring groove bearing 22, the first outer ring groove bearing 21 and the second outer ring groove bearing 22 are slidably arranged in the long rectangular channel steel 1 and are arranged adjacently, the adjacent grooves of the two bearings form a cylindrical hole, the steel inserting rod 5 is inserted from the cylindrical hole, and the diameter of the steel inserting rod 5 is the same as that of the cylindrical hole. The falling position of the steel inserting rod 5 is controlled by the cylindrical hole formed by the first outer ring groove bearing 21 and the second outer ring groove bearing 22, and the falling speed of the steel inserting rod 5 is detected by the inserting rod speed monitoring device 3 during the falling process of the steel inserting rod 5, so that the falling speed of the steel inserting rod 5 is monitored. Therefore, the speed inserting rod can realize the monitoring of the falling speed of the steel inserting rod 5 at different positions of the aerated concrete blank according to the adjustment of the falling position of the steel inserting rod 5.

[0064] In a preferred embodiment of the application, the diameter of the cylindrical hole is 1.5 cm, the steel inserting rod 5 is inserted from the cylindrical hole formed by the adjacent grooves of the two bearings, and the diameter of the inserting rod is the same as that of the cylindrical hole.

[0065] In a preferred embodiment of the application, the inserting rod speed monitoring device 3 is an electric laser speed monitoring device 31.

[0066] Preferably, the electric laser speed monitoring device 31 is arranged at a position 10-20 cm away from one side of the steel inserting rod 5.

[0067] As a preferred embodiment, the electric laser speed monitoring device 31 is arranged at a position 10-20 cm away from one side of the steel inserting rod 5, the falling speed of the inserting rod can be monitored according to the height and time of the falling of the inserting rod, and the speed and falling height data of the inserting rod are transmitted to the terminal through signals.

[0068] In a preferred embodiment of the application, the surface of the steel inserting rod 5 is coated with a fluorocarbon coating 6.

[0069] As a preferred embodiment, the steel inserting rod 5 has an embedded scale mark, the lower part is conical, and the surface of the steel inserting rod 5 is coated with a fluorocarbon coating 6, so that the friction between the inserting rod and the blank can be greatly reduced.

[0070] In a preferred embodiment of the present application, the long rectangular channel steel 1 is provided with a fixed clamping groove 4 at both ends.

[0071] As a preferred embodiment, the long rectangular channel steel 1 is provided with a fixed clamping groove 4 at both ends, so that the speed inserting rod device can be fixed on the mold, and then the aerated concrete blank to be tested is fixed.

[0072] The technical solutions of the present application will be further described below in combination with examples.

[0073] Example 1

[0074] Fig. 1 The structure of the speed inserting rod for testing provided in the present embodiment is shown in the schematic front view.

[0075] Fig. 2 The structure of the speed inserting rod for testing provided in the present embodiment is shown in the schematic top view.

[0076] Fig. 3 The structure of the long rectangular channel steel 1 of the speed inserting rod for testing provided in the present embodiment is shown in the schematic view.

[0077] Referring to Figs. 1-3 A speed inserting rod for testing, comprising: a long rectangular channel steel 1, a concave bearing 2, a steel inserting rod 5, and an inserting rod speed monitoring device 3;

[0078] The concave bearing 2 comprises a first outer ring concave bearing 21 and a second outer ring concave bearing 22, which are slidably arranged in the long rectangular channel steel 1, and the bearing axis is perpendicular to the long side of the long rectangular channel steel 1.

[0079] The first outer ring concave bearing 21 and the second outer ring concave bearing 22 are arranged adjacently, and the adjacent concave grooves of the two bearings form a cylindrical hole, the steel inserting rod 5 is inserted from the cylindrical hole, and the diameter of the steel inserting rod 5 is the same as the diameter of the cylindrical hole.

[0080] The inserting rod speed monitoring device 3 is arranged on the long rectangular channel steel 1, and is used for monitoring the descending speed of the steel inserting rod 5.

[0081] The speed inserting rod for testing provided in the present embodiment controls the falling position of the steel inserting rod 5 through the cylindrical hole formed by the first outer ring concave bearing 21 and the second outer ring concave bearing 22, and at the same time, the falling speed of the steel inserting rod 5 is detected by using the inserting rod speed monitoring device 3 during the falling process of the steel inserting rod 5, so that the descending speed of the steel inserting rod 5 is monitored, and then the above-mentioned speed inserting rod can adjust the falling position of the steel inserting rod 5, so as to monitor the descending speed of the steel inserting rod 5 at different positions of the aerated concrete blank.

[0082] As a preferred embodiment of the present embodiment, the cylindrical hole has a diameter of 1.5 cm, and the steel rod 5 is inserted into the cylindrical hole formed by the adjacent grooves of the two bearings, and the diameter of the rod is the same as that of the cylindrical hole.

[0083] As a preferred embodiment of the present embodiment, the speed monitoring device 3 is an electric laser speed monitor 31, which can monitor the speed of the rod in real time according to the height and time of the rod, and transmit the speed and rod height data to the terminal through a signal.

[0084] Preferably, the electric laser speed monitor 31 is arranged 10-20 cm away from one side of the steel rod 5.

[0085] As a preferred embodiment of the present embodiment, the steel rod 5 has an embedded scale mark, and the lower part is tapered, and the surface of the steel rod 5 has a fluorocarbon coating 6, which can greatly reduce the friction between the rod and the blank.

[0086] As a preferred embodiment of the present embodiment, the long rectangular channel steel 1 is provided with a fixed clamping groove 4 at both ends, which can fix the speed rod device on the mold, and then fix the measured aerated concrete blank.

[0087] Embodiment 2

[0088] A method for detecting the hardness and strength of an aerated concrete blank, comprising the following steps:

[0089] (1) After the aerated concrete is mixed and poured according to the proportion, it is respectively injected into 50cm×50cm×60cm and 15 10cm×10cm×10cm molds. In the 50cm×50cm×60cm mold, the gas height of the aerated concrete after gas evolution is controlled to be 6cm by adjusting the amount of slurry. In the 10cm×10cm×10cm mold, the gas height of the aerated concrete after gas evolution is controlled to be 10cm by adjusting the amount of slurry.

[0090] (2) The blank after gas evolution is placed in a mold with a temperature of 55 and a humidity of 95% for curing, and the blank has different hardness and strength by prolonging the curing time.

[0091] When the hardness is 90-110HV, 190-210HV, 290-310HV, 390-410HV, and 490-510HV, respectively, the specific hardness data measured by the hardness tester is 100HV, 205HV, 295HV, 405HV, and 505HV, respectively.

[0092] The green body strength of 10 cm x 10 cm x 10 cm is 0.03 MPa, 0.08 MPa, 0.14 MPa, 0.22 MPa and 0.35 MPa respectively.

[0093] (3) After the hardness data is tested by the hardness tester, the average speed of the speed insertion rod provided in Example 1 from the surface of the green body to the bottom is measured immediately, which is 56 mm / s, 20 mm / s, 8 mm / s, 3 mm / s and 1 mm / s respectively.

[0094] The process of measuring by the speed insertion rod provided in Example 1 is as follows: the tip of the bottom of the insertion rod is in contact with the aerated concrete gasification surface, the insertion rod is released, and the time is recorded at the same time. When the tip of the insertion rod contacts the bottom of the mold, the timing is stopped. The average speed of the speed insertion rod from the surface of the green body to the bottom is the height of the green body divided by the falling time of the speed insertion rod.

[0095] (4) The falling speed of the insertion rod measured by the speed insertion rod at each hardness is taken as the abscissa, and the specific hardness measured by the hardness tester is taken as the ordinate, which is 100 HV, 205 HV, 295 HV, 405 HV and 505 HV respectively. The relationship curve of falling speed-hardness is established by fitting the relationship formula as follows:

[0096] Y=-412.8exp(-x / 12)+500.9, R 2 =0.97. (In the formula: Y is the hardness of the measured point, x is the falling speed, R 2 is the correlation coefficient).

[0097] The falling speed of the insertion rod measured by the speed insertion rod at each hardness is taken as the abscissa, and the specific strength measured by the pressure machine is taken as the ordinate, which is 0.03 MPa, 0.08 MPa, 0.14 MPa, 0.22 MPa and 0.35 MPa respectively. The relationship curve of falling speed-strength is established as follows:

[0098] Y=-0.35exp(-x / 23)+0.38, R 2 =0.99. (In the formula: Y is the measured point strength, x is the falling speed, R 2 is the correlation coefficient).

[0099] (5), when the hardness and strength of the blank to be measured are determined, the speed of the speed inserting rod at different falling heights is determined, the speed data is brought into the falling speed-hardness and falling speed-strength relationship curves respectively, the hardness and strength data of the blank at different positions can be calculated, and the hardness and strength change curves can be drawn. By adjusting the position of the concave bearing 2 and the position of the channel steel, the hardness and strength of the aerated concrete blank to be measured at any point in the three-dimensional space can be determined.

[0100] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for testing the internal hardness and strength of aerated concrete blanks, characterized in that, The detection method includes: (1) After mixing and pouring the aerated concrete according to the mix proportion, pour it into 50cm×50cm×60cm and 15 10cm×10cm×10cm molds respectively. In the 50cm×50cm×60cm mold, adjust the amount of grout to control the aerated concrete to 6cm after the aerated concrete has finished generating gas. In a 10cm×10cm×10cm mold, the air-generating height of the aerated concrete after air generation is controlled to be 10cm by adjusting the amount of slurry. (2) After the gas generation is completed, the billet and the mold are placed in an environment with a temperature of 55℃ and a humidity of 95% for curing. By adjusting the curing time, the billet can have different hardness and strength. When the hardnesses were 90~110HV, 190~210HV, 290~310HV, 390~410HV, and 490~510HV, the specific hardness data measured by the hardness tester were 100HV, 205HV, 295HV, 405HV, and 505HV, respectively; the strengths of the 10cm×10cm×10cm blanks measured by the press were 0.03MPa, 0.08MPa, 0.14MPa, 0.22MPa, and 0.35MPa, respectively. (3) After the hardness data is tested by the hardness tester, the average speed of the probe from the surface of the blank in step (2) to the bottom is measured by the speed probe. The average speeds are 56 mm / s, 20 mm / s, 8 mm / s, 3 mm / s and 1 mm / s respectively. (4) Using the descent speed of the insertion rod measured at each hardness (56 mm / s, 20 mm / s, 8 mm / s, 3 mm / s, 1 mm / s) as the abscissa, and the specific hardness measured by the hardness tester (100 HV, 205 HV, 295 HV, 405 HV, 505 HV) as the ordinate, a relationship curve between descent speed and hardness is established by fitting the formula: Y = -412.8exp(-x / 12) + 500.9, R 2 =0.97; where: Y is the hardness of the point to be measured, x is the descent speed, and R is the descent speed. 2 The correlation coefficient; The descent speed of the insertion rod measured at each hardness level (56 mm / s, 20 mm / s, 8 mm / s, 3 mm / s, 1 mm / s) is plotted on the x-axis, and the specific strengths measured by the press (0.03 MPa, 0.08 MPa, 0.14 MPa, 0.22 MPa, 0.35 MPa) are plotted on the y-axis to establish the relationship curve between descent speed and strength. Y = -0.35exp(-x / 23) + 0.38, R 2 =0.99; where: Y is the intensity at the measurement point, x is the descent velocity, and R is the velocity at the measurement point. 2 The correlation coefficient; (5) When measuring the hardness and strength of the blank, the speed of the plunger is measured at different descent heights. The speed data is then substituted into the relationship curves of descent speed-hardness and descent speed-strength, so that the hardness and strength data at different positions of the blank can be calculated, and the hardness and strength variation curves can be plotted. By adjusting the position of the speed probe, the hardness and strength of the aerated concrete blank at any point in three-dimensional space can be measured.

2. The method for detecting the internal hardness and strength of aerated concrete blanks according to claim 1, characterized in that, The speed insertion rod includes: a long rectangular channel steel (1), a concave bearing (2), a steel insertion rod (5), and an insertion rod speed monitoring device (3); The concave bearing (2) includes a first outer ring groove bearing (21) and a second outer ring groove bearing (22). The first outer ring groove bearing (21) and the second outer ring groove bearing (22) are slidably disposed in the long rectangular channel steel (1), and the bearing axis is perpendicular to the long surface of the long rectangular channel steel (1). The first outer ring groove bearing (21) and the second outer ring groove bearing (22) are arranged adjacent to each other, and the adjacent grooves of the two bearings form a cylindrical hole. The steel insert (5) is inserted from the cylindrical hole, and the diameter of the steel insert (5) is the same as the diameter of the cylindrical hole. The insertion rod speed monitoring device (3) is installed on the long rectangular channel steel (1) and is used to monitor the descent speed of the steel insertion rod (5).

3. The method for detecting the internal hardness and strength of aerated concrete blanks according to claim 2, characterized in that, The insertion rod speed monitoring device (3) is an electric laser speed monitor (31).

4. The method for detecting the internal hardness and strength of aerated concrete blanks according to claim 2, characterized in that, The steel insert (5) is coated with a fluorocarbon coating (6).

5. The method for detecting the internal hardness and strength of aerated concrete blanks according to claim 2, characterized in that, The long rectangular channel steel (1) is provided with a fixing slot (4) for fixing with the aerated concrete blank to be tested.

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