Construction waste recycled aggregate detection system and operation method

Abstract

The invention relates to a construction waste recycled aggregate detection system and an operation method. The construction waste recycled aggregate detection system comprises a construction waste recycled aggregate apparent density and water absorption detection device and a construction waste recycled micro-powder stacking density and crushing value detection device. The device has the beneficial effects that the operation moving line is optimized, and the problems that a traditional detection device is scattered, time is consumed in sample transfer, and the operation moving line is disordered are solved; the immersion depth and the weighing height of the sample in the constant-temperature immersion tank can be flexibly adjusted; the interference of airflow on the high-precision electronic scale is reduced by matching with a detachable glass windshield, the accuracy of mass data in the apparent density and water absorption detection process is ensured, and the detection data discreteness caused by an external environment and an operation error is remarkably reduced; precise positioning of the steel test cylinder during crushing value detection is realized; the rubber pad on the inner wall of the arc-shaped steel plate can prevent the steel test cylinder from being stressed and deviated, and the problem of detection result deviation caused by unstable fixation of the test cylinder and uneven pressurization stress in traditional crushing value detection is solved.

Description

Technical Field

[0001] This invention belongs to the field of testing recycled aggregates from construction waste, and particularly relates to a testing system and operating method for recycled aggregates from construction waste. Background Technology

[0002] With the large-scale development of the construction industry and the acceleration of urban renewal, the amount of construction waste generated continues to rise. Processing it into recycled aggregate for resource utilization has become a core approach to alleviate the shortage of natural aggregate resources and reduce environmental pressure. The quality of recycled aggregate directly determines its applicability in engineering scenarios such as roadbed filling and concrete preparation. Apparent density, bulk density, water absorption rate, and crushing value are key indicators for measuring its performance and must be strictly tested and controlled in accordance with relevant standards. Current traditional testing methods have significant limitations: First, the equipment is highly dispersed. Apparent density testing requires water-immersed containers and weighing equipment, crushing value testing relies on independent presses, and bulk density testing requires separate sieving and measuring tools. Transferring samples between multiple devices is time-consuming and labor-intensive, and it is difficult to adapt to the compact working environment of engineering sites. Second, the operation process is cumbersome and lacks accuracy. For example, water absorption rate testing requires repeated manual transfer of samples to drain water, and natural bulk density testing relies on manual material feeding control, which can easily lead to excessive differences in parallel sample data due to operational differences. Third, the adaptability is poor. The irregular shape and mixed composition of recycled aggregates make it easy for traditional regular sample testing equipment to experience material jamming and measurement deviations, making it difficult to fully reflect the true performance of different batches of aggregates.

[0003] Furthermore, traditional testing is mostly conducted offline in laboratories, taking hours to days from sampling to receiving results. This cannot meet the rapid quality feedback requirements of recycled aggregate production lines, and often results in substandard products entering the project due to testing delays, causing potential quality risks or rework losses. While some existing automated testing equipment can improve efficiency, they mostly focus on a single testing item, and their low integration and high cost make them difficult to popularize in small and medium-sized resource recovery enterprises.

[0004] In conclusion, there is an urgent need to develop an integrated, rapid, and high-precision testing system for recycled construction waste aggregates to achieve simultaneous testing of multiple indicators and standardized operation, thereby addressing the industry pain points of traditional methods, such as scattered equipment, low efficiency, and insufficient accuracy. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a detection system and operation method for recycled aggregates from construction waste.

[0006] This construction waste recycled aggregate testing system includes: a device for testing the apparent density and water absorption rate of construction waste recycled aggregate and a device for testing the bulk density and crushing value of construction waste recycled powder; the device for testing the apparent density and water absorption rate of construction waste recycled aggregate is equipped with a double-layer worktable, with a drying oven placed on the lower worktable and a high-precision electronic scale placed on the upper worktable, and an embedded drain bracket and a constant temperature soaking tank embedded in the upper worktable; the device for testing the bulk density and crushing value of construction waste recycled powder includes a single-layer worktable and fixed brackets on both sides of the single-layer worktable; a press is fixed at the bottom of the fixed bracket on one side of the single-layer worktable, a steel test cylinder is fixed below the press, and a pull-out sieve is placed on the top of the fixed bracket; a vibrating table is placed on the top of the fixed bracket on the other side of the single-layer worktable, and a glass measuring cup is placed on the vibrating table; a high-precision electronic scale and a glass measuring cup are placed on the top of the single-layer worktable.

[0007] Preferably, a movable sample holder is placed on the lower worktable; the upper worktable has two reserved holes, in which the embedded drain bracket and the constant temperature soaking tank are respectively installed; the high-precision electronic scale of the construction waste recycled aggregate apparent density and water absorption rate detection device is equipped with a convex connecting groove, and a detachable glass windproof cover with a handle is fixed on the outside of the convex connecting groove; the embedded drain bracket is a double-layer structure composed of an upper V-shaped drain plate frame and a lower stainless steel plate; the V-shaped drain plate frame is composed of stainless steel plates and stainless steel pipes welded in a V-shape, with the stainless steel pipes welded between the stainless steel plates.

[0008] Preferably, a bottom sleeve is fixed to the upper worktable surface between the reserved holes, and a vertical rod is inserted into the bottom sleeve. The bottom of the vertical rod is fixed by an adjusting bolt. A cross sleeve is fixed to the vertical rod by the adjusting bolt. A hanging rod is inserted horizontally at both ends of the cross sleeve. A high-precision hook-type scale is fixed to the end of the hanging rod above the constant temperature soaking tank, and a self-locking hand-cranked winch is fixed to the end of the hanging rod above the embedded drain bracket. Both the high-precision hook-type scale and the self-locking hand-cranked winch are connected to a hanging line at the bottom, and the hanging line is connected to a drain net. The water level in the constant temperature soaking tank is controlled by a faucet and a drain pipe.

[0009] Preferably, the fixed support of the fixed press consists of four columns, with a supporting steel plate fixed between the four columns. A reaction beam is fixed to the top of the four columns, and the press is placed on the supporting steel plate with the upper part of the press in contact with the reaction beam. The end of the bottom pressure column of the press is a semi-circular end. Support beams are welded to the columns, and steel plates are welded to the top of the support beams. The steel test cylinder is fixed to the steel plate by a fixing device. The fixing device includes a jack and a connecting rod fixed between the columns. The connecting rod is welded with a positioning sleeve and a guide rail. The positioning sleeve is located between the guide rails, and the jack is inserted into the positioning sleeve. An I-shaped sliding rod is connected to the top of the jack, and the I-shaped sliding rod and the guide rail are slidably connected. A pressure rod is welded to the other side of the I-shaped sliding rod connected to the jack. An arc-shaped steel plate is welded to the end of the pressure rod, and a rubber pad is provided on the inner wall of the arc-shaped steel plate. The steel test cylinder is fixed directly below the pressure column by the arc-shaped steel plate.

[0010] Preferably, the pull-out screen frame consists of a clamping plate, a storage box, a collection box, and a V-shaped pull-out screen. The pull-out screen frame has multiple clamping plates inside, and the clamping plates have reserved holes. The collection box and the V-shaped pull-out screen are equipped with hanging ears. The collection box and the V-shaped pull-out screens of different particle sizes are fixed to the clamping plate by pins that pass through the reserved holes and hanging ears. The collection box is located on the bottom clamping plate, and the bottom of the collection box is equipped with a switch.

[0011] Preferably, a triangular support frame is welded to the side wall of the fixed support column of the pull-out screen frame, and a vibration table is welded to the bottom of the pull-out screen frame, wherein the vibration table is fixed on the triangular support frame, and a damper is installed between the vibration table and the triangular support frame.

[0012] The construction waste recycled aggregate testing system according to claim 1 is characterized in that: a vertical pole is fixed to the top of the single-layer workbench, and horizontal bars are symmetrically welded to both ends of the upper part of the vertical pole; a funnel slot is fixed to the end of the horizontal bar, and a controllable feeding hopper is built into the funnel slot; a bracket is fixed to the lower part of the vertical pole, and a glass measuring cup on the single-layer workbench is placed on the bracket; both the glass measuring cup on the bracket and the glass measuring cup on the vibration table are located directly below the controllable feeding hopper; an adjusting bolt fixing component is symmetrically provided on the vibration table surface for fixing the glass measuring cup, and the end of the adjusting bolt is made of elastic material and has a rubber band.

[0013] The operation method of this construction waste recycled aggregate testing system includes the following steps:

[0014] Step 1: Dry the recycled aggregate sample from construction waste, put the sample into a constant temperature soaking tank, take it out and weigh the surface dry mass m1 after it is saturated with water; put the sample back into the constant temperature soaking tank and weigh the mass m2 of the sample in water. The apparent density of the sample is obtained based on m1, m2 and the density of water.

[0015] Step 2: Weigh the dried sample mass m0; after removing the sample from the constant temperature soaking bath, weigh the surface dry mass m1 after it is saturated with water; obtain the water absorption rate of the sample based on m1 and m0.

[0016] Step 3: Sieve the sample through a pull-out sieve frame; weigh the empty glass measuring cup to obtain the mass m0.

[0017] Step 3.1: The sample falls freely until it fills the glass measuring cup; weigh the total mass m1 of the glass measuring cup and the sample; obtain the natural bulk density of the sample based on m0, m1 and the volume of the glass measuring cup;

[0018] Step 3.2: The sample is vibrated to fill the glass measuring cup using a vibration table, and the total mass m2 of the glass measuring cup and the sample is weighed; the compacted packing density of the sample is obtained based on m0, m2 and the volume of the glass measuring cup.

[0019] Step 4: Place the sample in the steel test cylinder, crush the sample with a press, put the sample into a pull-out sieve, weigh the mass of the sieved debris, and obtain the sample crushing value based on the mass of the debris and the mass of the sample in the steel test cylinder.

[0020] Preferably, in step 1, the constant temperature soaking tank is located on top of the double-layer workbench, and an embedded drain support is embedded in the top of the double-layer workbench. A vertical rod is connected to the double-layer workbench surface between the constant temperature soaking tank and the embedded drain support. A self-locking hand-cranked winch and a high-precision hook-type scale are respectively connected to the top two sides of the vertical rod. The high-precision hook-type scale and the self-locking hand-cranked winch are respectively connected to a drain net bag through a suspension line. The recycled aggregate sample of construction waste is placed in a drying oven to dry and the sample is selected. The sample is placed in a drain net bag, boiled in the constant temperature soaking tank and gradually cooled to room temperature. The drain net bag is removed and wiped clean, and the sample is wiped until it is saturated and surface dry. The drain net bag and the sample are placed on the high-precision electronic scale on the double-layer workbench and weighed to obtain m1. The drain net bag containing the sample is re-immersed in the constant temperature soaking tank and completely submerged without contacting the constant temperature soaking tank. The mass m2 of the sample in water is weighed by the high-precision hook-type scale.

[0021] Preferably, in step 2, the weighed sample is placed in a draining net bag and then placed in a constant temperature soaking tank. After soaking, the height of the draining net bag is adjusted by a self-locking hand-cranked winch for initial drainage. Then, the upright is rotated to transfer the draining net bag to the embedded draining bracket. The drained sample, together with the draining net bag, is placed on a high-precision electronic scale on a double-layer workbench for weighing. The total mass is then subtracted from the mass of the draining net bag to obtain the surface-drying mass m1 of the sample after water saturation.

[0022] The beneficial effects of this invention are:

[0023] 1) This invention constructs an integrated work platform by using a steel frame, an upper worktable, and a lower worktable. Core modules such as the drying oven, mobile sample holder, constant temperature immersion tank, and high-precision electronic scale are classified and integrated on different worktables. This avoids moisture changes and morphological damage caused by transferring samples across equipment. At the same time, it optimizes the operation flow and solves the problems of traditional testing devices being scattered, time-consuming sample transfer, and messy operation flow.

[0024] 2) This invention constructs an adjustable weighing system using a pole, cross sleeve, suspension rod, high-precision hook-type scale, and self-locking hand-cranked winch. With the addition of a suspension line and a drain net, the immersion depth and weighing height of the sample in the constant temperature soaking tank can be flexibly adjusted. The addition of a detachable glass windproof cover reduces the interference of airflow on the high-precision electronic scale, ensuring accurate mass data during the detection of apparent density and water absorption rate, and significantly reducing the dispersion of test data caused by external environment and operational errors.

[0025] 3) This invention uses a steel test cylinder positioning and fixing system composed of columns, support beams, steel plates, positioning sleeves, jacks, I-shaped sliding rods, and arc-shaped steel plates. Combined with a press and reaction beam, it can achieve precise positioning of the steel test cylinder during crushing value testing. The rubber pad on the inner wall of the arc-shaped steel plate can prevent the steel test cylinder from shifting under force, solving the problem of test result deviation caused by unstable test cylinder fixing and uneven pressure in traditional crushing value testing.

[0026] 4) This invention constructs a recycled micro powder bulk density testing system using a triangular support frame, a vibrating table, a funnel slot, a controllable feeding hopper, and a glass measuring cup. The adjusting bolts and rubber bands on the vibrating table can double-fix the glass measuring cup, and the controllable feeding hopper ensures uniform falling of micro powder. Combined with a pull-out sieve frame and V-shaped pull-out sieves of different particle sizes, it realizes the integrated operation of micro powder sieving and bulk density testing, solving the problems of uneven feeding and unstable fixing of measuring cups in traditional bulk density testing.

[0027] 5) This invention uses a layered screening system consisting of a pull-out screen frame, a card plate, a storage box, a collection box, and a V-shaped pull-out screen. The hanging ears and pins facilitate the disassembly and replacement of the screen, and the switch at the bottom of the collection box makes it easy to collect screen residues of different particle sizes. This structure is suitable for the characteristics of mixed components and uneven particle size of recycled aggregates, avoiding the problems of material jamming and inconvenient collection of screen residues in traditional screening devices, and improving screening efficiency and accuracy. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the elevation of a device for testing the apparent density and water absorption rate of recycled aggregates from construction waste.

[0029] Figure 2 This is a schematic diagram of the cross sleeve;

[0030] Figure 3 This is a schematic diagram of the embedded drain bracket;

[0031] Figure 4 This is a schematic diagram of a V-shaped drain rack;

[0032] Figure 5 This is a schematic diagram of the elevation of the device for detecting the bulk density and crushing value of recycled construction waste powder;

[0033] Figure 6 This is a schematic diagram of the funnel slot.

[0034] Figure 7 This is a schematic diagram of the fixed plane of the steel test cylinder;

[0035] Figure 8 This is a schematic diagram of the I-shaped sliding rod fixing process;

[0036] Figure 9 This is a schematic diagram of a pull-out screen frame.

[0037] Explanation of reference numerals in the attached drawings: 1-Steel bracket, 2-Upper worktable, 3-Lower worktable, 4-Drying oven, 5-Movable sample holder, 6-Constant temperature immersion tank, 7-Temperature control component, 8-Faucet, 9-Embedded drain bracket, 10-Pull-out water collection box, 11-Upright pole, 12-Cross sleeve, 13-Hanging rod, 14-Adjusting bolt, 15-High-precision hook-type scale, 16-Suspension line, 17-Self-locking hand-cranked winch, 18-Drainage net, 19-Bottom sleeve, 20-Drain pipe, 21-High-precision electronic scale, 22-Removable glass windproof cover, 23-Handle, 24-Protruding connecting groove, 25-V-type drain plate rack, 26-Stainless steel plate, 27-Stainless steel 28-Pipe, 29-Column, 30-Vibrating table, 31-Glass measuring cup, 32-Triangular support frame, 33-Bracket, 34-Horizontal bar, 35-Functional hopper slot, 36-Controllable feeding hopper, 37-Steel plate, 38-Positioning sleeve, 39-Jack, 40-Guide rail, 41-Pressure rod, 42-Arc-shaped steel plate, 43-Rubber pad, 44-I-shaped slide bar, 45-Steel test cylinder, 46-Connecting rod, 47-Pressure column, 48-Supporting steel plate, 49-Reaction beam, 50-Press machine, 51-Pull-out screen frame, 52-Clamping plate, 53-Storage box, 54-Collection box, 55-V-shaped pull-out screen, 56-Hanging ear, 57-Pin, 58-Rubber band. Detailed Implementation

[0038] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that those skilled in the art can make several modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0039] Example 1

[0040] As one embodiment, a detection system for recycled aggregates from construction waste is proposed, such as... Figure 1-9 As shown, it includes: a device for detecting the apparent density and water absorption rate of recycled aggregate from construction waste and a device for detecting the bulk density and crushing value of recycled micro powder from construction waste.

[0041] like Figure 1-4 As shown, the device for testing the apparent density and water absorption rate of recycled aggregate from construction waste is equipped with a double-layer workbench. A drying box 4 is placed on the lower workbench surface 3 of the double-layer workbench, and a high-precision electronic scale 21 is placed on the upper workbench surface 2 of the double-layer workbench. An embedded drain bracket 9 and a constant temperature soaking tank 6 are embedded in the upper workbench surface 2.

[0042] like Figure 3 and Figure 4 As shown, the lower worktable 3 is also equipped with a movable sample holder 5; the upper worktable 2 is provided with two reserved holes, and the embedded drain bracket 9 and the constant temperature soaking tank 6 are respectively installed in the reserved holes; the high-precision electronic scale 21 of the construction waste recycled aggregate apparent density and water absorption rate detection device is provided with a convex connecting groove 24, and a detachable glass windproof cover 22 with a handle is fixed on the outside of the convex connecting groove 24;

[0043] The embedded drain bracket 9 is a double-layer structure consisting of an upper V-shaped drain plate frame 25 and a lower stainless steel plate 26; the V-shaped drain plate frame 25 is composed of stainless steel plate 26 and stainless steel tube 27 welded in a V-shape, with the stainless steel tube 27 welded between the stainless steel plates 26.

[0044] like Figure 1 and Figure 2 As shown, a bottom sleeve 19 is fixed to the upper worktable 2 between the reserved holes. A vertical rod 11 is inserted into the bottom sleeve 19, and the bottom of the vertical rod 11 is fixed by an adjusting bolt 14. A cross sleeve 12 is fixed to the vertical rod 11 by the adjusting bolt 14. A hanging rod 13 is inserted horizontally at both ends of the cross sleeve 12. A high-precision hook scale 15 is fixed to the end of the hanging rod 13 above the constant temperature soaking tank 6. A self-locking hand-cranked winch 17 is fixed to the end of the hanging rod 13 above the embedded drain bracket 9. A hanging line 16 is connected to the lower part of both the high-precision hook scale 15 and the self-locking hand-cranked winch 17. A drain net 18 is connected to the hanging line 16. The water level of the constant temperature soaking tank 6 is controlled by a faucet 8 and a drain pipe 20.

[0045] like Figure 5-9As shown, the device for detecting the bulk density and crushing value of recycled construction waste powder includes a single-layer workbench and fixed supports on both sides of the single-layer workbench; a press 50 is fixed at the bottom of the fixed support on one side of the single-layer workbench, a steel test cylinder 45 is fixed below the press 50, and a pull-out sieve frame 51 is placed on the top of the fixed support; a vibration table 29 is placed on the top of the fixed support on the other side of the single-layer workbench, and a glass measuring cup 30 is placed on the vibration table 29; a high-precision electronic scale 21 and a glass measuring cup 30 are placed on the top of the single-layer workbench.

[0046] like Figure 5 and Figure 7 As shown, the fixed support of the fixed press 50 consists of four columns 28, with a supporting steel plate 48 fixed between the four columns 28. A reaction beam 49 is fixed to the top of the four columns 28. The press 50 is placed on the supporting steel plate 48, and the upper part of the press 50 is attached to the reaction beam 49. The end of the bottom pressure column 47 of the press 50 is a semi-circular end.

[0047] like Figure 5 and Figure 7 As shown, a support beam 36 is welded to the column 28, and a steel plate 37 is welded to the top of the support beam 36. The steel test cylinder 45 is fixed to the steel plate 37 by a fixing device. The fixing device includes a jack 39 and a connecting rod 46 fixed between the columns 28. The connecting rod 46 is welded with a positioning sleeve 38 and a guide rail 40. The positioning sleeve 38 is located between the guide rails 40. The jack 39 is inserted into the positioning sleeve 38. An I-shaped sliding rod 44 is connected to the end of the jack 39. The I-shaped sliding rod 44 and the guide rail 40 are slidably connected. A pressure rod 41 is welded to the other side of the I-shaped sliding rod 44 connected to the jack 39. An arc-shaped steel plate 42 is welded to the end of the pressure rod 41. A rubber pad 43 is provided on the inner wall of the arc-shaped steel plate 42. The steel test cylinder 45 is fixed directly below the pressure column 47 by the arc-shaped steel plate 42.

[0048] like Figure 9 As shown, the pull-out screen frame 51 consists of a clamping plate 52, a storage box 53, a collection box 54, and a V-shaped pull-out screen 55. The pull-out screen frame 51 has multiple layers of clamping plates 52 inside, each with pre-drilled holes. The collection box 54 and the V-shaped pull-out screen 55 are equipped with hanging ears 56. The collection box 54 and V-shaped pull-out screens 55 of different particle sizes are fixed to the clamping plate 52 by pins 57 passing through the pre-drilled holes and hanging ears 56. The collection box 54 is located on the bottom clamping plate 52, and a switch is located at the bottom of the collection box 54. A triangular support frame 31 is welded to the side wall of the fixed support column 28 on which the pull-out screen frame 51 is fixed. A vibration table 29 is welded to the bottom of the pull-out screen frame 51, wherein the vibration table 29 is fixed to the triangular support frame 31, and a damper is installed between the vibration table 29 and the triangular support frame 31.

[0049] like Figure 5 and Figure 6As shown, a vertical pole 11 is fixed to the top of the single-layer workbench. Horizontal bars 33 are symmetrically welded to both ends of the upper part of the vertical pole 11. A funnel slot 34 is fixed to the end of the horizontal bar 33, and a controllable feeding hopper 35 is built into the funnel slot 34. A bracket 32 ​​is fixed to the lower part of the vertical pole 11, and a glass measuring cup 30 on the single-layer workbench is placed on the bracket 32. Both the glass measuring cup 30 on the bracket 32 ​​and the glass measuring cup 30 on the vibrating table 29 are located directly below the controllable feeding hopper 35. The vibrating table 29 is symmetrically equipped with six adjusting bolts 14 for fixing the glass measuring cup 30. The ends of the adjusting bolts 14 are made of elastic material, and rubber bands 58 are provided at the ends of the bolts 14.

[0050] Example 2

[0051] As one embodiment, this second embodiment, based on the first embodiment, proposes a more specific detection system for recycled aggregates from construction waste, such as... Figure 1-9 As shown, it consists of an integrated testing device for the apparent density of irregular recycled aggregates from construction waste, a testing device for the water absorption rate of recycled aggregates from construction waste, an integrated testing device for the bulk density of recycled micro powder from construction waste, and a testing device for the crushing value of recycled aggregates from construction waste.

[0052] like Figure 1-4 As shown, the integrated device for detecting the apparent density of irregular recycled aggregate from construction waste and the device for detecting the water absorption rate of recycled aggregate from construction waste are composed of the following components: the steel bracket 1 is provided with an upper worktable 2 and a lower worktable 3; the drying box 4 and the movable sample holder 5 are located on the lower worktable 3; the upper worktable 2 is provided with reserved holes for installing an embedded drain bracket 9 and a constant temperature soaking tank 6; the high-precision electronic scale 21 is provided with a convex connecting groove 24 and is located on the upper worktable 2; a detachable glass windproof cover 22 is installed on the outside of the convex connecting groove 24, wherein the detachable glass windproof cover 22 is provided with a handle for easy movement; the embedded drain bracket 9 adopts a double layer The structure comprises a pull-out water collection box 10, a V-shaped drain rack 25, a stainless steel plate 26, and a stainless steel pipe 27. The V-shaped drain rack 25 is formed by welding the stainless steel plate 26 and the stainless steel pipe 27 in a V-shape. The lower part of the upright 11 is inserted into the bottom sleeve 19 and can rotate, and is fixed by adjusting bolts 14. The upper part is equipped with a cross sleeve 12, which can move up and down and is fixed by adjusting bolts 14. Two hanging rods 13 are inserted horizontally into the cross sleeve 12. The high-precision hook-type scale 15 and the self-locking hand-cranked winch 17 are connected to the hanging rods, and the lower part of each is equipped with a hanging line 16 connected to the drain net 18. The water level of the constant temperature soaking tank 6 is controlled by a faucet 8 and a drain pipe 20.

[0053] like Figure 5 , 7As shown in Figure 8, the press 50 is placed on four columns 28 supporting steel plates 48, with a reaction beam 49 on its upper part. The end of the press column 47 of the press 50 has a semi-circular end. The columns 28 are welded with support beams 36, and steel plates 37 are welded on the support beams 36. The steel test cylinder 45 is placed on the steel plates 37. The connecting rod 46 is welded with positioning sleeves 38 and guide rails 40, with jacks 39 inserted into the positioning sleeves 38. The I-shaped slide rod 44 can slide within the guide rails 40. A pressure rod 41 is welded to the I-shaped slide rod 44, and an arc-shaped steel plate 42 is welded to the end of the pressure rod 41. A rubber pad 43 is provided on the inner wall of the arc-shaped steel plate 42. By synchronously controlling two control jacks 39 to push the I-shaped slide rod 44, the pressure rod 41 is moved, and the steel test cylinder 45 is placed inside the arc-shaped steel plate 42 and fixed directly below the press column 47.

[0054] like Figure 9 As shown, the pull-out screen frame 51 consists of a clamping plate 52, a storage box 53, a collection box 54, a V-shaped pull-out screen 55, a hanging ear 56, and a pin 57. The pull-out screen frame 51 has multiple layers of clamping plates 52 inside, with pre-drilled holes in each clamping plate. The collection box 54 and V-shaped pull-out screens 55 of different particle sizes are placed on the clamping plates 52 and fixed by the pins 57. A switch is provided at the bottom of the collection box 54. The pull-out screen frame 51 is welded to a vibration table 29, which is fixed to a triangular support frame 31. A damper is installed at the fixed position, and the triangular support frame 31 is welded to a column 28.

[0055] like Figure 5 As shown, the controllable feeding hopper 35 is placed in the funnel slot 34, wherein the funnel slot 34 is symmetrically welded to the upright 11 by the connecting crossbar 33; a glass measuring cup 30 is placed at the bottom of the controllable feeding hopper 35, and the glass measuring cup 30 is placed on the bracket 32 ​​and the table surface of the vibration table 29 respectively, wherein 6 adjusting bolts 14 are symmetrically arranged on the table surface of the vibration table 29 to fix the glass measuring cup 30, the ends of the adjusting bolts 14 are made of elastic materials such as rubber, and rubber bands 58 are provided for secondary fixation.

[0056] It should be noted that the parts in this embodiment that are the same as or similar to those in Embodiment 1 can be referred to each other, and will not be repeated in this application.

[0057] Example 3

[0058] As one embodiment, this third embodiment, based on the second embodiment, proposes an operation method for a construction waste recycled aggregate detection system, such as... Figure 1-9 As shown, it includes the following steps:

[0059] Step 1: Dry the recycled aggregate sample from construction waste. Place the sample in a constant temperature soaking tank 6, remove it, and weigh the surface-dried mass m1 after saturation with water. Re-immerse the sample in the constant temperature soaking tank 6 and weigh the mass m2 in water. Calculate the apparent density of the sample based on m1, m2, and the density of water. Specifically, the apparent density of the recycled aggregate from construction waste is tested as follows:

[0060] like Figure 1-4 As shown, the recycled aggregate sample from construction waste was placed in the drying oven 4 for treatment, and a test sample was selected; the surface dry mass m1 after saturation with water was weighed; the sample was placed in a draining net bag 18, boiled in a constant temperature soaking tank 6, and gradually cooled to room temperature; the draining net bag 18 was removed, wiped clean, and the surface moisture of the aggregate was wiped off until it was saturated and dry. The detachable glass windproof cover 22 was moved by the handle 8, and the draining net bag 18 and the aggregate sample were placed on a high-precision electronic scale 21 for weighing, and the data m1 was read; the draining net bag 18 containing the aggregate sample of recycled construction waste was re-immersed in the constant temperature soaking tank 6, completely submerged without contact with the tank 6, and the mass of the sample in water was weighed by a high-precision hook scale 15, and the data m2 was read; according to the formula ρ=m1 / [(m1-m2) / ρwater], the apparent density of the recycled aggregate was calculated by substituting m1, m2, and the water density ρwater corresponding to the water temperature, with the result accurate to 0.001g / cm³. 3 ;

[0061] Step 2: Weigh the dried sample mass m0; place the sample in the constant temperature soaking tank 6, remove it, and weigh the surface-dried mass m1 after saturation with water; obtain the water absorption rate of the sample based on m1 and m0; specifically, water absorption rate test of recycled aggregate from construction waste:

[0062] like Figure 1-4 As shown, the high-precision electronic scale 21 weighs the mass of the recycled aggregate in the dry state, and records it as m0; the weighed aggregate is placed into the drain net bag 18 and placed in the constant temperature soaking tank 6; after soaking, the height of the drain net bag 18 is adjusted by the self-locking hand crank winch 17 for preliminary drainage, and then the upright 11 is rotated to transfer the drain net bag 18 to the embedded drain bracket 9, and then the mass of the saturated aggregate is weighed and recorded as m1; the drained aggregate together with the drain net bag 18 is placed on the high-precision electronic scale 21 for weighing, and the mass of the drain net bag 18 is subtracted after weighing the total mass to obtain the mass of the saturated aggregate m1; the water absorption rate of the recycled aggregate is obtained by the formula W=(m1-m0) / m0×100%.

[0063] The equipment used for testing the apparent density and water absorption rate of recycled construction waste aggregate is the same.

[0064] Step 3: Sieve the sample through the pull-out sieve frame 51; weigh the empty glass measuring cup 30 (m0).

[0065] Step 3.1: The sample falls freely until it fills the glass measuring cup 30; weigh the total mass m1 of the glass measuring cup 30 and the sample; obtain the natural bulk density of the sample based on m0, m1 and the volume of the glass measuring cup 30.

[0066] Step 3.2: The sample is vibrated through the vibration table 29 to fill the glass measuring cup 30. The total mass m2 of the glass measuring cup 30 and the sample is weighed. The compacted packing density of the sample is obtained based on m0, m2 and the volume of the glass measuring cup 30.

[0067] Step 4: Place the sample in the steel test cylinder 45, crush the sample with the press 50, put the sample into the pull-out sieve 51, weigh the mass of the sieved debris, and obtain the crushing value of the sample based on the mass of the debris and the mass of the sample in the steel test cylinder 45.

[0068] It should be noted that the parts in this embodiment that are the same as or similar to those in Embodiment 2 can be referred to each other, and will not be repeated in this application.

[0069] Example 4

[0070] As an example, this fourth embodiment, based on the third embodiment, proposes an operation method for a construction waste recycled aggregate detection system, such as... Figure 1-9 As shown, it includes the following steps:

[0071] Step 1: Dry the recycled aggregate sample from construction waste, put the sample into the constant temperature soaking tank 6, take it out and weigh the surface dry mass m1 after it is saturated with water; put the sample back into the constant temperature soaking tank 6 and weigh the mass m2 of the sample in water. The apparent density of the sample is obtained according to m1, m2 and the density of water.

[0072] Step 2: Weigh the dried sample mass m0; place the sample in the constant temperature soaking tank 6, remove it and weigh the surface dry mass m1 after water saturation; obtain the water absorption rate of the sample based on m1 and m0.

[0073] Step 3: Sieve the sample through the pull-out sieve frame 51; weigh an empty glass measuring cup 30 (mass m0); specifically, the bulk density of recycled construction waste powder is tested:

[0074] like Figure 5-9 As shown, the undersize portion of V-shaped pull-out screens 55 with different particle sizes is set as a sample through a pull-out sieve frame 51; and then dried and cooled. The mass m0 of the empty glass measuring cup 30 standard container is weighed using a high-precision electronic scale 21; natural stacking condition: a controllable feeding hopper 35 is installed directly above the glass measuring cup 30; vibration-compacted stacking condition: the vibration table is placed horizontally, and the center of the glass measuring cup vibration table is adjusted.

[0075] Step 3.1: The sample falls freely until it fills the glass measuring cup 30; the total mass m1 of the glass measuring cup 30 and the sample is weighed; the natural bulk density of the sample is obtained based on m0, m1, and the volume of the glass measuring cup 30; specifically, the natural bulk density is tested as follows:

[0076] like Figure 5-9 As shown, the sample is allowed to fall freely into the container through the controllable feeding hopper 35 until it overflows naturally; the overflow portion is removed by scraping horizontally along the top edge of the container with a scraper; the total mass m1 of the glass measuring cup and the naturally accumulated sample is weighed; the operation is repeated 3 times, and 3 sets of parallel sample data are obtained, with a range ≤ 0.03 g / cm³. 3 ;

[0077] The natural bulk density ρ1 = (m1 - m0) / V1, where V1 is the standard volume of the glass measuring cup in cm³. 3 ;

[0078] Step 3.2: The sample is vibrated through the vibration table 29 to fill the glass measuring cup 30, and the total mass m2 of the glass measuring cup 30 and the sample is weighed; the compacted bulk density of the sample is obtained based on m0, m2 and the volume of the glass measuring cup 30; specifically, the compacted bulk density is tested as follows:

[0079] like Figure 5-9 As shown, pour the sample into the glass measuring cup according to the natural accumulation procedure, turn on the vibration table, and vibrate for 30-60 seconds until the sample volume no longer changes; add sample until overflowing, and smooth the surface with a scraper; weigh the total mass m2 of the accumulated micro-powder in the glass measuring cup (30+ vibrations); repeat the operation 3 times, and take 3 sets of parallel sample data, with a range ≤0.05g / cm³. 3 ;

[0080] The tapped bulk density ρ2 = (m2 - m0) / V2, where V2 is the standard volume of a 30mm glass measuring cup, in cm³. 3 ;

[0081] Step 4: Place the sample in the steel test cylinder 45, crush the sample using the press 50, place the sample into the pull-out sieve 51, weigh the sieved debris, and obtain the sample crushing value based on the debris mass and the sample mass in the steel test cylinder 45; specifically, the crushing value test of recycled aggregate from construction waste:

[0082] like Figure 5-9 As shown, the steel test cylinder 45 and the sample are weighed, and then placed into the construction waste recycled aggregate crushing structure system for crushing. Then, the steel test cylinder 45 sample is placed into the pull-out sieve frame 51 structure system. Finally, the mass of the debris in the collection box 54 is placed in the glass measuring cup 30. The glass measuring cup 30 and the steel test cylinder 45 are weighed in advance. Substitute multiple sets of data into the following formula: Crushing value (%) = (mass of debris smaller than the specified particle size on the sieve / total mass of the sample) × 100%.

[0083] The bulk density test of recycled construction waste powder and the crushing value test of recycled construction waste aggregate share the same set of equipment.

[0084] It should be noted that the parts in this embodiment that are the same as or similar to those in Embodiment 3 can be referred to each other, and will not be repeated in this application.

[0085] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

Claims

1. A detection system for recycled aggregates from construction waste, characterized in that, include: The device for testing the apparent density and water absorption of recycled construction waste aggregate and the device for testing the bulk density and crushing value of recycled construction waste powder are as follows: The device for testing the apparent density and water absorption of recycled construction waste aggregate is equipped with a double-layer workbench. A drying oven is placed on the lower workbench, and a high-precision electronic scale is placed on the upper workbench. The upper workbench is embedded with a drainage bracket and a constant temperature soaking tank. The device for testing the bulk density and crushing value of recycled construction waste powder includes a single-layer workbench and fixed brackets on both sides of the single-layer workbench. A press is fixed at the bottom of the fixed bracket on one side of the single-layer workbench, and a steel test cylinder is fixed below the press. A pull-out sieve is placed on the top of the fixed bracket on the other side of the single-layer workbench. A vibrating table is placed on the top of the fixed bracket on the other side of the single-layer workbench, and a glass measuring cup is placed on the vibrating table. A high-precision electronic scale and a glass measuring cup are placed on the top of the single-layer workbench.

2. The construction waste recycled aggregate detection system according to claim 1, characterized in that, The lower worktable is also equipped with a movable sample holder; the upper worktable has two pre-reserved holes, in which the embedded drain bracket and the constant temperature soaking tank are respectively installed; the high-precision electronic scale of the construction waste recycled aggregate apparent density and water absorption rate testing device is equipped with a convex connecting groove, and a detachable glass windproof cover with a handle is fixed on the outside of the convex connecting groove; the embedded drain bracket is a double-layer structure consisting of an upper V-shaped drain plate frame and a lower stainless steel plate; the V-shaped drain plate frame is composed of stainless steel plates and stainless steel pipes welded in a V-shape, with the stainless steel pipes welded between the stainless steel plates.

3. The construction waste recycled aggregate detection system according to claim 2, characterized in that, A bottom sleeve is fixed to the upper worktable surface between the reserved holes, and a vertical rod is inserted into the bottom sleeve. The bottom of the vertical rod is fixed by an adjusting bolt. A cross sleeve is fixed to the vertical rod by the adjusting bolt. A hanging rod is inserted horizontally at both ends of the cross sleeve. A high-precision hook-type scale is fixed to the end of the hanging rod above the constant temperature soaking tank, and a self-locking hand-cranked winch is fixed to the end of the hanging rod above the embedded drain bracket. Both the high-precision hook-type scale and the self-locking hand-cranked winch are connected to a hanging line at the bottom, and the hanging line is connected to a drain net. The water level in the constant temperature soaking tank is controlled by a faucet and a drain pipe.

4. The construction waste recycled aggregate detection system according to claim 1, characterized in that, The fixed support of the press consists of four columns, with a steel plate fixed between them. A reaction beam is fixed to the top of the four columns, and the press is placed on the steel plate with its upper part against the reaction beam. The bottom column of the press has a semi-circular end. Support beams are welded to the columns, and steel plates are welded to the top of the support beams. The steel test cylinder is fixed to the steel plate by a fixing device. The fixing device includes a jack and a connecting rod fixed between the columns. The connecting rod is welded with a positioning sleeve and a guide rail. The positioning sleeve is located between the guide rails, and the jack is inserted into the positioning sleeve. An I-shaped sliding rod is connected to the top of the jack, and the I-shaped sliding rod and the guide rail are slidably connected. A pressure rod is welded to the other side of the I-shaped sliding rod connected to the jack. An arc-shaped steel plate is welded to the end of the pressure rod, and a rubber pad is provided on the inner wall of the arc-shaped steel plate. The steel test cylinder is fixed directly below the pressure column by the arc-shaped steel plate.

5. The construction waste recycled aggregate detection system according to claim 1, characterized in that, The pull-out screen frame consists of a clamping plate, a storage box, a collection box, and a V-shaped pull-out screen. The pull-out screen frame has multiple clamping plates inside, and the clamping plates have reserved holes. The collection box and the V-shaped pull-out screen are equipped with hanging ears. The collection box and the V-shaped pull-out screens of different particle sizes are fixed to the clamping plate by pins that pass through the reserved holes and hanging ears. The collection box is located on the bottom clamping plate, and the bottom of the collection box is equipped with a switch.

6. The construction waste recycled aggregate detection system according to claim 4, characterized in that, The fixed support column of the pull-out screen frame is welded with a triangular support frame on its side wall. The bottom of the pull-out screen frame is welded with a vibrating table, which is fixed on the triangular support frame. A damper is installed between the vibrating table and the triangular support frame.

7. The construction waste recycled aggregate detection system according to claim 1, characterized in that, A vertical pole is fixed to the top of the single-layer workbench, and horizontal bars are symmetrically welded to both ends of the upper part of the vertical pole. A funnel slot is fixed to the end of the horizontal bar, and a controllable feeding hopper is built into the funnel slot. A bracket is fixed to the lower part of the vertical pole, and the glass measuring cup on the single-layer workbench is placed on the bracket. The glass measuring cup on the bracket and the glass measuring cup on the vibrating table are both located directly below the controllable feeding hopper. The vibrating table surface is symmetrically equipped with an adjusting bolt for fixing the glass measuring cup. The end of the adjusting bolt is made of elastic material and has a rubber band.

8. A method for operating a construction waste recycled aggregate detection system as described in any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Dry the recycled aggregate sample from construction waste, put the sample into a constant temperature soaking tank, take it out and weigh the surface dry mass m1 after it is saturated with water; put the sample back into the constant temperature soaking tank and weigh the mass m2 of the sample in water. The apparent density of the sample is obtained based on m1, m2 and the density of water. Step 2: Weigh the dried sample mass m0; after removing the sample from the constant temperature soaking bath, weigh the surface dry mass m1 after it is saturated with water; obtain the water absorption rate of the sample based on m1 and m0. Step 3: Sieve the sample through a pull-out sieve frame; weigh the empty glass measuring cup to obtain the mass m0. Step 3.1: The sample falls freely until it fills the glass measuring cup; weigh the total mass m1 of the glass measuring cup and the sample; obtain the natural bulk density of the sample based on m0, m1 and the volume of the glass measuring cup; Step 3.2: The sample is vibrated to fill the glass measuring cup using a vibration table, and the total mass m2 of the glass measuring cup and the sample is weighed; the compacted packing density of the sample is obtained based on m0, m2 and the volume of the glass measuring cup. Step 4: Place the sample in the steel test cylinder, crush the sample with a press, put the sample into a pull-out sieve, weigh the mass of the sieved debris, and obtain the sample crushing value based on the mass of the debris and the mass of the sample in the steel test cylinder.

9. The operation method of the construction waste recycled aggregate detection system according to claim 8, characterized in that, In step 1, the constant temperature soaking tank is located on top of the double-layer workbench. An embedded drain support is embedded in the top of the double-layer workbench. A vertical pole connects the double-layer workbench surface between the constant temperature soaking tank and the embedded drain support. A self-locking hand-cranked winch and a high-precision hook-type scale are connected to the top of the vertical pole on both sides, respectively. The high-precision hook-type scale and the self-locking hand-cranked winch are connected to a drain net via a suspension line. The recycled aggregate sample from construction waste is placed in a drying oven to dry, and a sample is selected. The sample is placed in the drain net, boiled in the constant temperature soaking tank, and gradually cooled to room temperature. The drain net is removed, wiped clean, and the sample is wiped until saturated and surface-dry. The drain net and sample are placed on the high-precision electronic scale on the double-layer workbench and weighed to obtain m1. The drain net containing the sample is then re-immersed in the constant temperature soaking tank, completely submerged without contacting the tank. The mass m2 of the sample in water is weighed using the high-precision hook-type scale.

10. The operation method of the construction waste recycled aggregate detection system according to claim 9, characterized in that, In step 2, the weighed sample is placed in a draining net bag in a constant temperature soaking tank. After soaking, the height of the draining net bag is adjusted by a self-locking hand-cranked winch for initial drainage. Then, the upright is rotated to transfer the draining net bag to the embedded draining bracket. The drained sample, along with the draining net bag, is placed on a high-precision electronic scale on a double-layer workbench for weighing. The total mass is weighed and the mass of the draining net bag is subtracted to obtain the surface-drying mass m1 of the sample after water saturation.

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