Device and method for detecting content of stone powder in cement stable mixture

Abstract

The invention discloses a cement stable mixture stone powder content detection device which comprises a shell, a weighing shell is arranged in the shell, and a weighing sensor is arranged at the bottom of the weighing shell; a left bin and a right bin are arranged in the weighing shell, a middle pipe is arranged between the left bin and the right bin, the middle pipe is connected with the left bin and the right bin, a first screen and a second screen are arranged in the left bin in the longitudinal direction, and a third screen and a fourth screen are arranged in the right bin in the longitudinal direction; the device for detecting the content of the stone powder in the cement stable mixture can greatly reduce the workload of detection personnel and reduce the labor intensity, the detection device can accurately detect the content of stone powder particles smaller than 0.075 mm in a cement stable mixture sample in cooperation with the detection method of the detection device, the result does not contain the content of cement particles smaller than 0.075 mm in cement, and the detection result is accurate. According to the device, the cement stable mixture is continuously stirred in the drying process, cement condensation is effectively avoided, and the precision of a detection result is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering material detection, in particular to a device and a method for detecting stone powder content in a cement-stabilized mixture. Background Art

[0002] According to the requirements of "Technical Specifications for Highway Pavement Base Construction" JTG / TF20-2015, during the construction of highway engineering cement-stabilized graded crushed stone mixture, it is necessary to carry out testing of the "mixture gradation" (actually aggregate mixture, generally composed of four specifications of sand and gravel: 0-5mm, 5-10mm, 10-20mm, 20-31.5mm), and the passing percentage of 0.075mm particles only includes the stone powder particles smaller than 0.075mm in the aggregate, and does not include the cement particles smaller than 0.075mm in the cement.

[0003] To ensure the consistency between the test samples and the construction site, according to the sampling requirements stipulated in the "Test Procedure for Inorganic Binder Stabilized Materials for Highway Engineering JTG3441-2024" T0841-2009 on the sampling method for inorganic binder stabilized materials: "When sampling at the construction site, samples should be taken from the left, middle and right within the paving width of the paver", the samples retrieved on site are all cement-stabilized mixtures (a mixture of coarse aggregate, fine aggregate, cement and water). According to the existing specifications, the ordinary water washing method cannot solve two problems: 1. During the drying process of the cement-stabilized mixture, the cement will undergo a certain degree of condensation due to the high temperature and static environment, which will affect the test results; 2. The lost mass of the cement-stabilized mixture sample includes not only the stone powder particles smaller than 0.075mm in the aggregate, but also the cement particles smaller than 0.075mm in the cement, which does not meet the specific requirements of the regulations on the limit range of the percentage of particles smaller than 0.075mm in the aggregate, and is prone to deviation in the test results. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a device and a method for detecting the stone powder content in a cement-stabilized mixture, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for testing the stone powder content of cement stabilized mixture, comprising the following steps:

[0006] Step 1: drying: drying a certain amount of cement stabilized mixture samples;

[0007] Step 2: Weigh the sample after drying and cooling to obtain the weighed mass m 1 ;

[0008] Step 3: Rinse the weighed sample and filter it through a mesh sieve with a mesh size of 0.075 mm to collect the filtered sample;

[0009] Step 4: Weigh again after drying. Weigh the filtered sample after drying to obtain the weighed mass m. 2 , m 1 -m 2 That is, the mass of stone powder particles smaller than 0.075 mm in the sample, and the content x 1 =(m 1 -m 2 ) / m 1 *100%;

[0010] Step 5, detecting the cement content n% in the cement stabilized mixture sample, n%=cement weight / (total weight-cement weight)*100%;

[0011] Step 6: Detect the content of cement particles smaller than 0.075 mm in cement 2 ;

[0012] The content of stone powder particles less than 0.075 mm in the final cement stabilized mixture sample x 3 The calculation formula is: 3 =[m 1 -m 2 -m 1 *n%*x 2 / (1+n%)]*(1+n%) / m 1 *100%

[0013] As a preferred technical solution of the present invention, the drying temperature in step 1 is 109°C to 111°C.

[0014] As a preferred technical solution of the present invention, in the step 1, the sample is stirred during drying.

[0015] As a preferred technical solution of the present invention, in step five, the cement content in the cement-stabilized mixture sample is detected using the method of "Test Procedure for Inorganic Binder Stabilized Materials for Highway Engineering JTG3441-2024" T0809-2009.

[0016] As a preferred technical solution of the present invention, in step 6, the content of cement particles smaller than 0.075 mm in the cement is x 2 The detection method and the content of particles less than 0.075 mm in cement stabilized mixture samples 1 The detection method is the same.

[0017] A device for detecting stone powder content in cement-stabilized mixture comprises a shell, a weighing shell is arranged inside the shell, and a weighing sensor is arranged at the bottom of the weighing shell;

[0018] A left bin and a right bin are arranged inside the weighing shell, a middle tube is arranged between the left bin and the right bin, the middle tube is connected with the left bin and the right bin, a valve is arranged at the connection, a valve is arranged at the other end of the middle tube and connected with an external ventilation duct, a heating tube and a matching temperature control component are arranged on the inner walls of the left bin and the right bin, a first screen and a second screen are arranged in the longitudinal direction in the left bin, and a third screen and a fourth screen are arranged in the longitudinal direction in the right bin;

[0019] Among them, a valve and a liquid pump are arranged at the liquid accumulation port below the second screen, the output port of the liquid pump is connected to the middle pipe, a liquid discharge pipe with a valve is arranged at the liquid accumulation port below the fourth screen, and a magnetic stirrer is arranged at the bottom of the fourth screen;

[0020] A cover body is provided on the top of the shell, and stirring motors are provided at positions of the cover body corresponding to the left bin and the right bin, stirring blades are installed on the output shaft of the stirring motor, and exhaust holes and spray ports are provided on the cover body at positions corresponding to the left bin and the right bin.

[0021] As a preferred technical solution of the present invention, the mesh size of the first sieve is 4.75 mm, the mesh size of the second sieve is 1.18 mm, the mesh size of the third sieve is 0.6 mm, and the mesh size of the fourth sieve is 0.075 mm.

[0022] As a preferred technical solution of the present invention, the first screen, the second screen, the third screen and the fourth screen are all removably installed inside the weighing shell through a fulcrum.

[0023] As a preferred technical solution of the present invention, leveling fulcrums are provided at the four corners of the bottom of the housing.

[0024] As a preferred technical solution of the present invention, the first screen and the third screen are formed by a punching process.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: the device for detecting the stone powder content in cement-stabilized mixture can greatly reduce the workload of detection personnel and reduce labor intensity, and the detection device can accurately detect the content of stone powder particles less than 0.075 mm in cement-stabilized mixture samples in conjunction with its detection method, and the result does not include the content of cement particles less than 0.075 mm in cement. The device continuously stirs the cement-stabilized mixture during the drying process, effectively avoiding the coagulation of cement and ensuring the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the structure of the present invention;

[0027] Figure 2 This is a cross-sectional view of the left warehouse structure of the present invention;

[0028] Figure 3 It is a cross-sectional view of the right warehouse structure of the present invention.

[0029] In the figure: 1 shell, 2 leveling fulcrum, 3 weighing shell, 4 weighing sensor, 5 left bin, 6 right bin, 7 first screen, 8 second screen, 9 third screen, 10 fourth screen, 11 middle pipe, 12 liquid pump, 13 magnetic stirrer, 14 drain pipe, 15 cover, 16 stirring blade, 17 spray port, 18 exhaust hole, 19 stirring motor. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-3 The present invention provides a technical solution: a device for detecting the stone powder content of cement-stabilized mixture, comprising a shell 1, and leveling fulcrums 2 are arranged at the four corners of the bottom of the shell 1 to facilitate leveling of the device and ensure the accuracy of weighing data. A weighing shell 3 is arranged inside the shell 1, and a weighing sensor 4 is arranged at the bottom of the weighing shell 3;

[0032] A left bin 5 and a right bin 6 are provided inside the weighing shell 3, a middle tube 11 is provided between the left bin 5 and the right bin 6, the middle tube 11 is connected to the left bin 5 and the right bin 6, a valve is provided at the connection, a valve is provided at the other end of the middle tube 11 and connected to an external ventilation duct, a heating tube and a matching temperature control component are provided on the inner walls of the left bin 5 and the right bin 6, which are used to increase the internal temperature of the left bin 5 and the right bin 6 to dry the cement stabilized mixture sample, and the left bin 5 and the right bin 6 are ventilated through the middle tube 11 during drying, and air containing a large amount of moisture is discharged from the exhaust hole 18 on the cover body 15 to improve the drying efficiency, at this time, the valve on the right bin 6 is opened, the valve on the left bin 5 is opened, a first screen 7 and a second screen 8 are provided in the left bin 5 along the longitudinal direction, and a third screen 9 and a fourth screen 10 are provided in the right bin 6 along the longitudinal direction;

[0033] The mesh size of the first sieve 7 is 4.75mm, the mesh size of the second sieve 8 is 1.18mm, the mesh size of the third sieve 9 is 0.6mm, and the mesh size of the fourth sieve 10 is 0.075mm. Since the sieve holes of the first sieve 7 and the third sieve 9 are subjected to the stirring pressure of the stirring blades, the first sieve 7 and the third sieve 9 need to improve their damage resistance by using punching and thickening the plate material; the second sieve 8 needs to improve its damage resistance by thickening the longitude and latitude lines of the sieve. Since the remaining sieves are used to reduce the sample retention and protection of the fourth sieve 10, only the fourth sieve 10 actually produces the particle evaluation effect. Therefore, except for the fourth sieve 10, the other three sizes of sieves do not need to fully comply with the requirements of GB / T 6003.2-2012 "Technical Requirements and Inspection of Test Sieve Part 2 Metal Perforated Plate Test Sieve" and GB / T 6003.1-2022 "Technical Requirements and Inspection of Test Sieve Part 1: Technical Requirements for Metal Wire Mesh Test Sieve";

[0034] The first screen 7, the second screen 8, the third screen 9 and the fourth screen 10 are all removably installed in the weighing housing 3 through a fulcrum, so that they can be easily removed for cleaning;

[0035] A valve and a liquid pump 12 are provided at the liquid accumulation port below the second screen 8, the output port of the liquid pump 12 is connected to the middle pipe 11, a liquid discharge pipe 14 with a valve is provided at the liquid accumulation port below the fourth screen 10, and a magnetic stirrer 13 is provided at the bottom of the fourth screen 10;

[0036] A cover body 15 is provided on the top of the outer shell 1, and stirring motors 19 are provided at positions of the cover body 15 corresponding to the left bin 5 and the right bin 6. A stirring blade 16 is installed on the output shaft of the stirring motor 19, and exhaust holes 18 and spray ports 17 are provided on the cover body 15 at positions corresponding to the left bin 5 and the right bin 6.

[0037] The method for using the device to detect the content of stone powder particles less than 0.075mm in cement stabilized mixture is as follows:

[0038] Step one, drying, add a certain amount of cement-stabilized mixture samples to the first sieve 7, start the heating tube to dry it, the drying temperature is 109°C ~ 111°C, and stir the samples with the stirring blades 16 during drying. The stirring blades 16 in the left bin 5 are 5mm away from the first sieve 7, and stirring and cleaning are performed by slow stirring; the stirring blades 16 in the right bin 6 are 10mm away from the third sieve 9, and are stirred about 0.5 times faster than the left side, using water flow to drive the flow and cleaning of the samples. The shape of the stirring blades 16 allows the samples to be shoveled upwards during the stirring process. In addition to having a flipping and enhanced cleaning effect, it also avoids pressure and excessive wear on the first sieve 7 and the third sieve 9 during the blade stirring process;

[0039] Step 2: weighing: weigh the dried and cooled sample, specifically weigh the sample and the weighing shell 3 as a whole, and subtract the weight of the weighing shell 3 without the sample from the obtained data to obtain the weighing mass m. 1 ;

[0040] Step three, flushing, the external water source flushes the weighed sample through the spray port 17, the flushed slurry is filtered through the first sieve 7 and the second sieve 8, and then the slurry is transported to the right bin 6 through the middle pipe 11 by the liquid pump 12. At this time, the valve on the right bin 6 is opened, and the valve on the left bin 5 is closed. The slurry is filtered through the third sieve 9 and finally filtered through the fourth sieve 10 with a mesh size of 0.075 mm. The filtered sample is retained in the weighing shell 3, and the discharged part is water and powder with a size less than 0.075 mm;

[0041] Step 4: weigh again after drying. The weighing shell 3 with the sample retained is weighed after drying. After subtracting the original weight of the weighing shell 3, the weighing mass m is obtained. 2 , m 1 -m 2 That is, the mass of particles smaller than 0.075 mm in the sample, and the content x 1 =(m 1 -m 2 ) / m 1 *100%, the particles include stone powder particles smaller than 0.075mm in aggregate and cement particles smaller than 0.075mm in cement;

[0042] During drying, the external airflow enters the left bin 5 and the right bin 6 through the middle pipe 11. At this time, the valve on the right bin 6 is opened, and the valve on the left bin 5 is opened, and the water vapor generated by internal heating is quickly discharged through the exhaust hole 18, thereby improving the drying efficiency;

[0043] The middle tube 11 serves as both a ventilation duct and a liquid infusion duct. On the one hand, it dries the moisture in the tube by ventilation to prevent residual moisture from affecting the weighing and test results; on the other hand, it can use water washing and high-pressure airflow to blow away fine particles or residues in the tube to avoid clogging of the pipeline, thereby increasing the life of the instrument.

[0044] Step 5: Use the method of "Testing Procedure for Stabilized Materials of Inorganic Binders for Highway Engineering JTG 3441-2024" T0809-2009 to detect the cement content in the cement-stabilized mixture sample, and detect the cement content n% in the cement-stabilized mixture sample, n% = cement weight / (total weight-cement weight)*100%;

[0045] Step 6: Detect the content of cement particles smaller than 0.075 mm in cement 2 , the content of cement particles smaller than 0.075 mm in cement 2The detection method and the content of particles smaller than 0.075 mm in cement stabilized mixture samples 1 The detection method is the same.

[0046] The content of stone powder particles less than 0.075 mm in the final cement stabilized mixture sample x 3 The calculation formula is:

[0047] x 3 =[m 1 -m 2 -m 1 *n%*x 2 / (1+n%)]*(1+n%) / m 1 *100%.

[0048] The above formula is explained in detail as follows:

[0049] m 1 -m 2 It is the mass lost after cement-stabilized mixture is dried, that is, the mass of particles smaller than 0.075 mm, which includes the mass of stone powder particles smaller than 0.075 mm in aggregate and the mass of cement particles smaller than 0.075 mm in cement;

[0050] Since n% is the percentage of cement in aggregate (excluding cement itself), m 1 *n%*x 2 / (1+n%) is the mass of cement particles smaller than 0.075 mm in cement;

[0051] The mass of aggregate after removing cement from cement-stabilized mixture is m 1 / (1+n%);

[0052] x 3 That is, the percentage of stone powder particles smaller than 0.075mm (excluding cement particles smaller than 0.075mm in cement) in aggregate.

[0053] The actual case is as follows:

[0054] 1. Cement constant detection and collection: Start the instrument → open the lid → weigh the internal structure of the instrument and record the weight A0 → put the dried cement sample into the instrument → weigh the cement + the weight of the internal structure A1 → cover the instrument lid and connect the water source → start flushing → dry after flushing → continue to ventilate and cool after drying → open the lid → weigh the remaining mass of the cement after flushing and sieving + the mass of the instrument A2.

[0055] Initial mass of cement sample M0 = A1-A0

[0056] Cement mass loss after flushing M1 = A1-A2

[0057] Cement particle content less than 0.075 mm X1 = M1 / M0 × 100%

[0058] For example, A0 = 45021g; A1 = 55023g; A2 = 45189g

[0059] Initial mass of cement sample M0 = A1-A0 = 55023-45021 = 10002g

[0060] Cement mass loss after flushing M1 = A1-A2 = 55023-45189 = 9834g

[0061] The content of cement particles smaller than 0.075 mm is X1=M1 / M0×100%=9834 / 10002×100%=98.32%.

[0062] 2. Cement dosage test: Use the "Test Procedure for Inorganic Binder Stabilized Materials for Highway Engineering JTG 3441-2024" T0809-2009 to test the cement dosage in the cement stabilized mixture. (For example, 5%).

[0063] 3. Detection of particle content less than 0.075mm in cement-stabilized mixture: Start the instrument → open the lid → weigh the internal structure of the instrument and record the weight B0 → heat the instrument to 110℃±1℃ → put a certain number of cement-stabilized mixture samples into the instrument (the estimated dry mass of the samples should meet the requirements of the specifications) → cover the lid and dry (the blades will stir 2-3 times in the last 5 seconds of each minute during the drying process) → continue to ventilate after drying and cool → open the lid → weigh the cement-stabilized mixture after drying + the weight of the internal structure B1 → cover the instrument lid and connect the water source → start rinsing → dry after rinsing → continue to ventilate after drying and cool → open the lid → weigh the remaining mass of the cement-stabilized mixture after rinsing, sieving and drying + the mass of the instrument B2.

[0064] Initial mass of cement stabilized mixture after drying M2 = B1-B0

[0065] The mass loss of cement stabilized mixture after flushing is M3 = B1-B2

[0066] The mass of particles larger than 0.075 mm after flushing the cement stabilized mixture is M4 = B2-B0

[0067] Cement stabilized mixture with particle content less than 0.075 mm X2 = M3 / M2 × 100% For example, B0 = 45021 g; B1 = 56035 g; B2 = 54911 g

[0068] Initial mass of cement stabilized mixture after drying

[0069] M2=B1-B0=56035-45021=11014g

[0070] Cement stabilized mix quality loss after flushing

[0071] M3=B1-B2=56035-54911=1124g

[0072] The mass of particles larger than 0.075 mm after flushing of cement stabilized mixture

[0073] M4=B2-B0=54911-45021=9890g

[0074] Cement stabilized mixture with particle content less than 0.075 mm

[0075] X2=M3 / M2×100%=1124 / 11014×100%=10.2%.

[0076] 4. Calculation of cement and cement particles smaller than 0.075 mm in cement-stabilized mixture: According to the "Testing Procedure for Stabilized Materials of Inorganic Binders for Highway Engineering JTG 3441-2024", when the cement-stabilized mixture is dry and the cement dosage is 5%, the cement mass is

[0077] M5=M2-M2 / (1+5%)=11014-11014 / 1.05=524g.

[0078] According to the results obtained in "1. Cement constant collection", the mass of cement particles is: total mass M5 = 524g; the mass of cement particles less than 0.075mm M6 = M5×X1 = 524×98.32% = 515g; the mass of cement particles greater than 0.075mm M7 = M5-M6 = 524-515 = 9g.

[0079] 5. Calculation of aggregate mass: The initial dry mass of cement-stabilized mixture is M2=11014g, the cement mass is calculated to be M5=524g, then the aggregate mass M=11014-524=10490g.

[0080] 6. Calculation of the mass of stone powder particles smaller than 0.075 mm in aggregate: The mass loss of cement-stabilized mixture after flushing is M3=1124 g, which includes the mass of cement particles smaller than 0.075 mm in cement M6=515 g. Therefore, the actual mass of stone powder particles smaller than 0.075 mm in aggregate is M8=1124-515=609 g.

[0081] 7. Given that the aggregate mass M = 10490 g; the actual mass of stone powder particles smaller than 0.075 mm in the aggregate M8 = 609 g, then the content of stone powder particles smaller than 0.075 mm in the aggregate X3 = M8 / M×

[0082] 100% = 609 / 10490 × 100% = 5.8%, which is quite different from the previously calculated X2 (10.2%). Therefore, this method can more accurately detect and calculate the content of stone powder particles less than 0.075 mm in the aggregate mixture part of the cement stabilized mixture.

[0083] Although this method uses stirring blades to disturb the cement-stabilized mixture during the drying process, it still cannot necessarily ensure that the cement will not coagulate at high temperatures, thereby affecting the detection results of stone powder particles smaller than 0.075 mm in the cement-stabilized mixture. Therefore, before use, parameter calibration should be carried out for different cement types, different cement dosages, and different aggregates. The method is as follows:

[0084] Step a: Use water washing method to detect the content of stone powder particles smaller than 0.075 mm in the pure aggregate. 1 .

[0085] Step b, using this method to detect the content Q of stone powder particles less than 0.075 mm in cement stabilized mixtures mixed with different cement brands, models and dosages 2 .

[0086] Step c, obtain the correction constant: y = Q 1 / Q 2 .

[0087] For example: The content of stone powder particles less than 0.075 mm in a certain aggregate is Q 1 =5.2%

[0088] This method is used to detect the content of stone powder particles smaller than 0.075 mm in aggregate in a cement stabilized mixture mixed with a certain cement brand, model and dosage of 5%. 2 =4.5%.

[0089] Then the correction constant: y = Q 1 / Q 2 =5.2 / 4.5=1.16.

[0090] During the construction process, the content of stone powder particles less than 0.075 mm in the aggregate of the cement stabilized mixture mixed with the aggregate, a certain cement brand, a certain type, and a 5% dosage was detected. 3 If the content of X is 4.1%, then the corrected content is: 3 =x 3 ×y=4.1%×1.16=4.8%.

[0091] This method can be used to correct the deviation in test results caused by the loss of stone powder particles smaller than 0.075 mm due to high-temperature condensation and different life cycles of the instrument, including the wear of the standard sieve, under different brands, different aggregates and different cement dosages.

[0092] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for testing the stone powder content of cement stabilized mixture, characterized in that: The following steps are involved: Step 1: drying: drying a certain amount of cement stabilized mixture samples; Step 2: weighing: weighing the dried and cooled sample to obtain a weighed mass m1; Step 3: Rinse the weighed sample and filter it through a mesh sieve with a mesh size of 0.075 mm to collect the filtered sample; Step 4: weigh again after drying. The filtered sample is dried and weighed to obtain the weighed mass m2, where m1-m2 is the mass of particles smaller than 0.075 mm in the sample, and the content x1 = (m1-m2) / m1*100%; Step 5, detecting the cement content n% in the cement stabilized mixture sample, n%=cement weight / (total weight-cement weight)*100%; Step 6, detecting the content of cement particles smaller than 0.075 mm in cement x2; The calculation formula for the content of stone powder particles less than 0.075 mm x 3 in the final cement stabilized mixture sample is: x3=[m1-m2-m1*n%*x2 / (1+n%)]*(1+n%) / m1*100%.

2. The method for testing the stone powder content of cement stabilized admixture according to claim 1, characterized in that: The drying temperature in step 1 is 109° C. to 111° C.

3. The method for testing the stone powder content of cement stabilized admixture according to claim 1, characterized in that: In the step 1, the sample is stirred during drying.

4. The method for testing the stone powder content of cement stabilized admixture according to claim 1, characterized in that: In step 5, the cement content in the cement-stabilized mixture sample is detected using the method of "Test Procedure for Inorganic Binder Stabilized Materials for Highway Engineering JTG 3441-2024" T0809-2009.

5. The method for testing the stone powder content of cement stabilized admixture according to claim 1, characterized in that: In step six, the method for detecting the content x2 of cement particles smaller than 0.075 mm in cement is the same as the method for detecting the content x1 of particles smaller than 0.075 mm in the cement stabilized mixture sample.

6. A device for detecting the stone powder content of cement stabilized mixture, comprising a housing (1), characterized in that: A weighing shell (3) is arranged inside the housing (1), and a weighing sensor (4) is arranged at the bottom of the weighing shell (3); The weighing housing (3) is provided with a left bin (5) and a right bin (6), a middle tube (11) is provided between the left bin (5) and the right bin (6), the middle tube (11) is connected to the left bin (5) and the right bin (6), a valve is provided at the connection, the other end of the middle tube (11) is provided with a valve and is connected to an external ventilation duct, a heating tube and a matching temperature control component are provided on the inner walls of the left bin (5) and the right bin (6), a first screen (7) and a second screen (8) are provided in the longitudinal direction of the left bin (5), and a third screen (9) and a fourth screen (10) are provided in the longitudinal direction of the right bin (6); A valve and a liquid pump (12) are provided at the liquid accumulation port below the second screen (8), the output port of the liquid pump (12) is connected to the middle pipe (11), a liquid discharge pipe (14) with a valve is provided at the liquid accumulation port below the fourth screen (10), and a magnetic stirrer (13) is provided at the bottom of the fourth screen (10); A cover body (15) is provided on the top of the housing (1), and stirring motors (19) are provided at positions of the cover body (15) corresponding to the left bin (5) and the right bin (6), and stirring blades (16) are installed on the output shaft of the stirring motor (19), and exhaust holes (18) and spray ports (17) are provided at positions of the cover body (15) corresponding to the left bin (5) and the right bin (6).

7. The device for detecting the stone powder content of cement-stabilized admixture according to claim 6, characterized in that: The mesh size of the first sieve (7) is 4.75 mm, the mesh size of the second sieve (8) is 1.18 mm, the mesh size of the third sieve (9) is 0.6 mm, and the mesh size of the fourth sieve (10) is 0.075 mm.

8. The device for detecting the stone powder content of cement-stabilized admixture according to claim 6, characterized in that: The first screen (7), the second screen (8), the third screen (9) and the fourth screen (10) are all installed in the weighing housing (3) via a fulcrum so as to be removable.

9. The device for detecting the stone powder content of cement-stabilized admixture according to claim 6, characterized in that: Leveling fulcrums (2) are provided at the four corners of the bottom of the housing (1).

10. The device for detecting the stone powder content of cement-stabilized admixture according to claim 6, characterized in that: The first screen (7) and the third screen (9) are formed by a punching process.

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