Components, devices and processes for a comparative cement-based sample for detecting the activity index of slag powder

Abstract

The present invention relates to a component, device and process for a comparative cement-based sample for detecting the activity index of slag powder. The base sample includes the following weight ratios of each component: Portland cement clinker: citric acid slag: limestone: volcanic rock: fly ash: cement modifier = 24: 1.5: 1.8: 1.5: 1.2: 0.009; the attached moisture content of each group is less than 0.2%; Portland cement clinker: the content of C3S + C2S is 75.5% ± 0.5%, f-CaO: ≤ 1.0%, loss on ignition ≤ 1.0%, alkali content ≤ 0.6%, 3-day compressive strength ≥ 30 MPa, 28-day compressive strength ≥ 55 MPa; citric acid slag: SO3 content is 45% ± 1%; the present invention is reasonably designed, compact in structure and convenient to use.

Description

Technical Field

[0001] The present invention relates to a component, a device and a process for a comparative cement-based sample for detecting the activity index of slag powder. Background Art

[0002] Slag powder is a high-quality cement admixture ground from granulated blast furnace slag and has been widely used in the building materials field. An important index for evaluating slag powder is the activity index. The test method for the activity index of slag powder is specified in Appendix A of the standard GB / 18046-2017 "Granulated Blast Furnace Slag Powder for Cement, Mortar and Concrete". The requirements for the comparative cement are as follows: Portland cement or ordinary Portland cement with a strength grade of 42.5 that complies with GB175, and the compressive strength at 3 days is 25-35 MPa, the compressive strength at 7 days is 35-45 MPa, the compressive strength at 28 days is 50-60 MPa, the specific surface area is 350-400 m2 / Kg, the sulfur trioxide content is 2.3%-2.8%, and the alkali content is 0.5%-0.9%. Because the requirements for the comparative cement have a relatively wide range, the comparative cements used by different slag powder users and different inspection institutions vary greatly. During the daily inspection of slag powder, it is often encountered that the same slag powder sample has different inspection results, or different slag powder samples have large inspection errors due to different comparative cements. In severe cases, it will cause the phenomenon of unqualified quality inspection results or product quality complaints. Summary of the Invention

[0003] Generally speaking, the technical problem to be solved by the present invention is to provide a component, a device and a process for a comparative cement-based sample for detecting the activity index of slag powder. The patent number of the parent case is 202011045988.5, and the name is a manufacturing device and process for a comparative cement-based sample for detecting the activity index of slag powder; the application date: September 28, 2020.

[0004] To solve the above problems, the technical solutions adopted by the present invention are as follows:

[0005] A manufacturing process for a comparative cement-based sample for detecting the activity index of slag powder, wherein the base sample includes the weight ratio of each component: Portland cement clinker: citric acid residue: limestone: volcanic rock: fly ash: cement modifier is 24:1.5:1.8:1.5:1.2:0.009;

[0006] The attached moisture content of each group is less than 0.2%;

[0007] Portland cement clinker: the content of C3S + C2S is 75.5% ± 0.5%, f-CaO: ≤ 1.0%, loss on ignition ≤ 1.0%, alkali content ≤ 0.6%, compressive strength at 3 days ≥ 30 MPa, compressive strength at 28 days ≥ 55 MPa;

[0008] Citric acid residue: the SO3 content is 45% ± 1%;

[0009] Limestone: CaO content ≥ 45%, AL2O3 content ≤ 2.5%, MgO content ≤ 3.0%, alkali content ≤ 0.6%;

[0010] The activity index of volcanic rock and fly ash ≥ 70%, and the alkali content of fly ash ≤ 0.6%;

[0011] Step 1, prefabricate each component material; First, prepare each component material; Then, crush various materials to a particle size less than 0.5 cm.

[0012] As a further improvement of the above technical solution:

[0013] After mixing evenly, pour it into a test small mill of 500 cm × 500 cm, grind for 38 minutes, pour out the material, pass it through a 0.9 mm square sieve, cool it to room temperature and then store it sealed;

[0014] Step 2, prepare mortar; First, add water to the pot and then add the sample from Step 1; Then, place the pot on the fixed rack and raise it to the stirring position for low-speed stirring; After that, add sand evenly. When each grade of sand is packed separately, start from the coarsest particle size grade and add the required amount of each grade of sand in turn. Turn the machine to high speed for further mixing, stop stirring regularly, and use a rubber scraper to scrape the mortar on the blades and the pot wall into the middle of the pot;

[0015] Step 3, carry out molding; First, fix the empty test mold and mold sleeve on the vibrating table with a fixture. Directly scoop the mortar from the mixing pot into the test mold in two layers. When loading the first layer, put mortar in each groove. Place a large spreading tool vertically on the top of the mold sleeve and move it back and forth along each mold groove to level and vibrate the material layer; Then, load the second layer of mortar and spread and vibrate it with a small spreading tool; After that, loosen the fixture, remove the mold sleeve, take the test mold off the vibrating table, and place a metal straightedge at an angle of nearly 90 degrees at one end of the top of the test mold; Subsequently, move it slowly to the other end in a transverse sawing motion along the length direction of the test mold to scrape off the mortar exceeding the test mold part at one time, and use the same straightedge to level the surface of the test piece in an almost horizontal situation;

[0016] Step 4, First, remove the mortar remaining around the mold. Put the marked test mold on the horizontal grid in the fog storage or curing box for curing. The wet air should be able to contact each side of the test mold. During curing, do not place the test mold on other test molds. Take it out for demolding when it reaches the specified demolding time. Before demolding, number or mark the test piece with waterproof ink or other pigment pens. For test pieces with more than two ages, when numbering, the three test pieces in the same test mold should be divided into more than two ages;

[0017] Step 5, demolding: For specimens with a 24-hour age, demolding shall be carried out within 20 minutes before breaking the mold. For specimens with an age of more than 24 hours, demolding shall be carried out between 20 and 24 hours after molding. Demolded specimens that have been used for the 24-hour age test shall be covered with a wet cloth until the test is conducted.

[0018] Step 6, place the marked specimens horizontally or vertically in the curing water at 20 ± 1°C. When placed horizontally, the scraping surface shall face upward. The specimens shall be placed on a grid and kept at a certain distance from each other to allow water to contact the six surfaces of the specimens, provided that the distance between specimens during curing or the water depth on the upper surface of the specimens shall not be less than 5 mm. Except for specimens with a 24-hour age or specimens demolded up to 48 hours later, specimens of any age shall be taken out of the water 15 minutes before the breaking test, the sediment on the surface of the specimens shall be wiped off, and the specimens shall be covered with a wet cloth until breaking.

[0019] Step 7, calculate the activity index of slag powder

[0020] A = R0 × 100 / R

[0021] Where: A represents the activity index of slag powder; R0 represents the compressive strength of the reference mortar; R represents the compressive strength of the test mortar.

[0022] A device for making reference cement for detecting the activity index of slag powder, comprising

[0023] A feeding device for screening, separating, and storing each component material according to the material.

[0024] A batching device for quantitatively storing each component material according to the mesh number.

[0025] A mixing device for adding materials to the prefabricated aqueous solution in batches according to the mesh number and stirring.

[0026] A feeding device for quantitatively taking out materials from the mixing device.

[0027] And / or a mold closing device for placing the quantitative materials into the mold and vibrating and forming.

[0028] As a further improvement of the above technical solution:

[0029] The feeding device includes a vertically arranged feeding channel;

[0030] At the upper end of the feeding channel, a feeding inlet and a feeding waste outlet are respectively arranged. At the feeding waste outlet, a vertical feeding auger is arranged at the feeding inlet to disperse the falling materials. Above the vertical feeding auger, a feeding exhaust fan is arranged to extract the falling dust. At the lower end of the feeding channel, a feeding outlet is arranged, and the input end of a feeding pre-screening layer net is hinged at the feeding outlet. The feeding pre-screening layer net is used to place particles larger than the set mesh aperture.

[0031] At the lower end of the input end of the feeding pre-screening layer net, a layered screen is hinged in layers. A falling miscellaneous material collection box is arranged below the lowest-layered screen; the layered screen has the same structure as the feeding pre-screening layer net;

[0032] The mesh holes of the layered screen gradually become smaller downward; the layered screen is equipped with a dryer;

[0033] In the layered screen and the feeding pre-screening layer net, feeding blocking rollers are horizontally distributed. A number of groups of feeding blocking brushes are arranged on the feeding blocking rollers. A feeding passage gap is arranged between the feeding blocking brushes and the feeding blocking rollers to allow the material to move forward. A feeding discharge port is arranged at the output end of the layered screen. A feeding horizontal passage is longitudinally arranged at the feeding discharge port. A feeding horizontal push rod moves longitudinally in the feeding horizontal passage. A vibration-driven feeding delivery passage is horizontally arranged outside the feeding discharge port. A feeding terminal baffle is arranged at the output end of the feeding delivery passage;

[0034] The inlet of the feeding delivery passage is at the lower end of the lower swing of the layered screen;

[0035] Feeding guide blocks are sleeved at the ends of the feeding horizontal push rods of each layer. Feeding connecting spring rods are directly connected between the feeding guide blocks of each layer. A feeding bottom buffer spring is arranged below the output end of the layered screen;

[0036] The batching device includes batching layered quantitative storage tanks that are staggered in layers on the batching rotating frame, are connected by cross arms and are equipped with gravity sensors. A batching lower baffle is arranged at the lower end of the batching layered quantitative storage tanks;

[0037] The batching layered quantitative storage tanks correspond to the output ends of the corresponding feeding delivery passages.

[0038] The mixing device includes a mixing conveyor belt; a mixing belt process gap is arranged on the mixing conveyor belt; a mixing upper tank station and a mixing station are arranged on the mixing conveyor belt;

[0039] A mixing batching pot is conveyed on the mixing conveyor belt. A mixing support hand is arranged on the mixing batching pot. A mixing lower top head and a mixing stirring paddle are arranged above the mixing batching pot. A mixing material hopper is arranged below the mixing lower top head;

[0040] A mixing L lifting hand is arranged at the mixing station to lift the mixing batching pot;

[0041] The feeding device includes a feeding rotating frame with one end arranged at the mixing belt process gap of the mixing station to receive the mixing batching pot and rotate it to the feeding station; a feeding eccentric stirring paddle and a feeding lifting hand are arranged above the feeding station in a lifting manner;

[0042] At the lower end of the feeding lifting arm, there are eccentrically rotated a feeding inclined dialing arm and a feeding scraping arm respectively for contacting the inner side wall of the mixing batching pot; at the lower end of the feeding scraping arm, there is a feeding straight scraper for contacting the inner side wall, above the feeding straight scraper, there is a feeding front inclined opening, at the lower end of the feeding straight scraper, there is a feeding bottom inclined surface with a transverse outer high and back low setting, at the upper end of the other side of the feeding bottom inclined surface, there is a feeding back inclined surface with a wider upper part and a narrower lower part, on the forward side surface of the feeding scraping arm, there is a feeding side lower inclined surface with an inclined outer high and back low setting, above the feeding station, there is a feeding robotic arm, at the lower end of the feeding robotic arm, there is a feeding fixed inclined block, on the inclined surface of the feeding fixed inclined block, there is a vertically rotated feeding inclined rotating shaft, on the feeding inclined rotating shaft, there is a rotated feeding rotating inclined block, the feeding rotating inclined block is connected with a feeding clamping arm, and at the end of the feeding clamping arm, there is a feeding ladle for taking out the base sample of the mixing batching pot;

[0043] The die closing device includes a mixing conveyor belt horizontally arranged with a pre-installed mixing carrier, and on the mixing conveyor belt, there are successively arranged a mixing upper tire station for feeding a mixing mold onto the mixing carrier, a vibrating station with a vibrating table and corresponding to the feeding station, a scraping glue station for attaching sand cleaning glue to the outer shape of the mold, a curing station for die closing and curing the mold, and a demolding and sampling station.

[0044] A manufacturing process for a comparative cement base sample for detecting the activity index of slag powder, the specific steps are as follows,

[0045] S1, The feeding device stores each component material according to material screening and separation;

[0046] S2, The batching device stores each component material according to the mesh number in a quantitative manner;

[0047] S3, The mixing device adds the materials to the prefabricated aqueous solution in a graded manner according to the mesh number and stirs;

[0048] S4, The feeding device quantitatively takes out the materials from the mixing device;

[0049] S5, The die closing device places the quantitative materials into the mold and vibrates them into shape.

[0050] As a further improvement of the above technical solution:

[0051] In S1 - S2, first, the material falls through the feeding channel to the feeding outlet. The vertical feeding auger disperses the falling material, and a feeding exhaust fan is arranged above the vertical feeding auger to extract the falling dust. Then, the feeding connecting spring rod drives the feeding guide block to move up and down in linkage, driving the feeding transverse push rod to move longitudinally in the feeding transverse channel. The feeding pre - screening layer net and the grading sieve net swing up and down, causing the material to move forward. At the same time, the material falls step by step, with large particles stored in the feeding pre - screening layer net and small particles stored in the falling miscellaneous material collection box and dried by a dryer. Again, the feeding blocking brush blocks and temporarily stores the forward - moving material. After that, the material overflows and moves forward through the gap above the feeding. When the screening of the material blocked by the feeding blocking brush is completed, the feeding blocking brush leaves, allowing the material to move forward. Subsequently, the batching layered quantitative storage tank is at the lower end of the output end of the corresponding feeding delivery channel to receive the material, and is measured by a gravity sensor to drive the batching lower baffle to adjust the falling amount of the material.

[0052] In S3, first, the corresponding individual batching layered quantitative storage tanks of the batching device rotate above the mixing station. Then, the mixing L lifting hand holds up the mixing batching pot and rises. Secondly, the mixing lower top moves downward to open the batching lower baffle, and the material falls from the mixing hopper into the mixing batching pot. Again, the mixing stirring paddle stirs the mixing batching pot.

[0053] In S4, first, the feeding rotating frame receives the mixing batching pot and rotates it to the feeding station. Then, the feeding eccentric stirring paddle stirs the mixing batching pot. Secondly, the feeding lifting hand descends, and the feeding inclined rotating shaft drives the feeding rotating inclined block to rotate in a conical trajectory movement, and the feeding ladle takes out the base sample of the mixing batching pot.

[0054] In S5, first, at the mixing and mounting tire station, the mixing mold is sent onto the mixing carrier. Then, at the compaction station, the feeding ladle sends the base sample of the mixing batching pot into the mixing mold and compacts it. Secondly, at the scraping glue station, the outer shape of the mold is attached with cleaning sand glue. Again, at the maintenance station, the mold is closed and maintained. After that, at the demolding and sampling station, the mixing mold is demolded.

[0055] The design of the present invention is reasonable, with low cost, strong and durable, safe and reliable, simple to operate, time - saving and labor - saving, cost - saving, compact in structure and convenient to use. The present invention enables the comparison cement base sample to have basically the same chemical composition and physical properties and can be stored for a long time.

[0056] Due to the consistency of the results and performance of this sample, it is possible to avoid large detection errors caused by the inconsistent results and performance of the slag powder and the comparison cement. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a schematic structural diagram of the use of the present invention.

[0058] Figure 2 It is a schematic structural diagram of the feeding device of the present invention.

[0059] Figure 3 It is a schematic structural diagram of the batching device of the present invention.

[0060] Figure 4 It is a schematic structural diagram of the mixing device of the present invention.

[0061] Figure 5 It is a schematic structural diagram of the feeding device in use of the present invention.

[0062] Figure 6 It is a schematic structural diagram of the mold clamping device of the present invention.

[0063] Among them: 1. Feeding device; 2. Batching device; 3. Mixing device; 4. Feeding device; 5. Mold clamping device; 6. Feeding channel; 7. Feeding inlet; 8. Waste discharging port of feeding; 9. Vertical auger of feeding; 10. Exhaust fan of feeding; 11. Output port of feeding; 12. Pre-screening layer net of feeding; 13. Stop roller of feeding; 14. Blocking brush of feeding; 15. Passing gap of feeding; 16. Discharge port of feeding; 17. Horizontal channel of feeding; 18. Horizontal push rod of feeding; 19. Feeding out channel of feeding; 20. Terminal baffle of feeding; 21. Stratified screen net; 22. Collection frame for falling miscellaneous materials; 23. Rotating frame of batching; 24. Stratified quantitative storage tank of batching; 25. Lower baffle of batching; 26. Mixing conveyor belt; 27. Process gap of mixing belt; 28. Mixing batching pot; 29. Supporting hand of mixing; 30. Mixing station; 31. L-shaped lifting hand of mixing; 32. Mixing paddle; 33. Mixing hopper; 34. Lower top head of mixing; 35. Feeding rotating frame; 36. Feeding station; 37. Eccentric stirring paddle of feeding; 38. Lifting hand of feeding; 39. Diagonal pushing arm of feeding; 40. Scraping arm of feeding; 41. Front inclined opening of feeding; 42. Back inclined surface of feeding; 43. Straight scraping plate of feeding; 44. Bottom inclined surface of feeding; 45. Side lower inclined surface of feeding; 46. Feeding robot arm; 47. Diagonal rotating shaft of feeding; 48. Fixed diagonal block of feeding; 49. Rotating diagonal block of feeding; 50. Clamping arm of feeding; 51. Dipper of feeding; 52. Mixing conveyor belt; 53. Tire mounting station of mixing; 54. Carrier of mixing; 55. Mold of mixing; 56. Compaction station; 57. Glue scraping station; 58. Maintenance station; 59. Demolding and sampling station; 60. Guide block of feeding; 61. Connecting spring rod of feeding; 62; Bottom buffer spring of feeding. Detailed implementation manners

[0064] As Figures 1-6 shown, the comparative cement making device for detecting the activity index of slag powder in this embodiment includes

[0065] a feeding device 1 for storing each component material by screening and separating the materials.

[0066] The batching device 2 is used to quantitatively store each component material according to the mesh number;

[0067] The mixing device 3 is used to add the materials into the prefabricated aqueous solution by grading according to the mesh number and stir;

[0068] The feeding device 4 is used to quantitatively take out the materials from the mixing device 3;

[0069] And / or the mold clamping device 5 is used to place the quantitative materials into the mold and vibrate and compact them into shape.

[0070] The feeding device 1 includes a vertically arranged feeding channel 6;

[0071] At the upper end of the feeding channel 6, a feeding inlet 7 and a feeding waste discharge port 8 are respectively arranged; at the feeding waste discharge port 8, a vertical feeding auger 9 is arranged at the position of the feeding inlet 7 to disperse the falling materials; above the vertical feeding auger 9, a feeding exhaust fan 10 is arranged to extract the falling dust; at the lower end of the feeding channel 6, a feeding output port 11 is arranged, and the input end of a feeding pre-screening layer net 12 is hinged at the feeding output port 11; the feeding pre-screening layer net 12 is used to place particles with a size larger than the set mesh aperture;

[0072] At the lower end of the input end of the feeding pre-screening layer net 12, a layered screen net 21 is hinged in layers, and a falling miscellaneous material collection frame 22 is arranged below the lowermost layered screen net 21; the layered screen net 21 has the same structure as the feeding pre-screening layer net 12;

[0073] The mesh of the layered screen net 21 gradually becomes smaller downward; the layered screen net 21 is equipped with a dryer;

[0074] In the layered screen net 21 and the feeding pre-screening layer net 12, feeding blocking rollers 13 are horizontally distributed, and a number of groups of feeding blocking brushes 14 are arranged on the feeding blocking rollers 13. A feeding passing gap 15 is arranged between the feeding blocking brushes 14 and the feeding blocking rollers 13 to allow the materials to move forward; at the output end of the layered screen net 21, a feeding discharge port 16 is arranged, and a feeding horizontal channel 17 is longitudinally arranged at the feeding discharge port 16; a feeding horizontal push rod 18 is longitudinally movable in the feeding horizontal channel 17, and a vibration-driven feeding delivery channel 19 is horizontally arranged outside the feeding discharge port 16, and a feeding terminal baffle 20 is arranged at the output end of the feeding delivery channel 19;

[0075] The inlet of the feeding delivery channel 19 is at the lower swing terminal of the layered screen net 21;

[0076] Feeding guide blocks 60 are sleeved at the ends of the feeding horizontal push rods 18 of each layer, feeding connecting spring rods 61 are directly connected between the feeding guide blocks 60 of each layer, and a feeding bottom buffer spring 62 is arranged below the output end of the layered screen net 21;

[0077] The batching device 2 includes batching layered quantitative storage tanks 24 which are arranged in a staggered manner in layers on the batching rotating frame 23, are connected by cross arms and are equipped with gravity sensors. A batching lower baffle 25 is arranged at the lower end of the batching layered quantitative storage tank 24;

[0078] The batching layered quantitative storage tank 24 corresponds to the output end of the corresponding feeding and sending channel 19.

[0079] The mixing device 3 includes a mixing conveyor belt 26; a mixing belt process gap 27 is arranged on the mixing conveyor belt 26; a mixing upper tank station and a mixing station 30 are arranged on the mixing conveyor belt 26;

[0080] A mixing batching pot 28 is conveyed on the mixing conveyor belt 26, and a mixing support hand 29 is arranged on the mixing batching pot 28; a mixing lower top head 34 and a mixing stirring paddle 32 are arranged above the mixing batching pot 28; a mixing material hopper 33 is arranged below the mixing lower top head 34;

[0081] A mixing L lifting hand 31 is arranged at the mixing station 30 to lift the mixing batching pot 28;

[0082] The feeding device 4 includes a feeding rotating frame 35 with one end arranged at the mixing belt process gap 27 of the mixing station 30 to receive the mixing batching pot 28 and rotate it to the feeding station 36; a feeding eccentric stirring paddle 37 and a feeding lifting hand 38 are arranged above the feeding station 36 in a lifting manner;

[0083] A feeding inclined dialing arm 39 and a feeding scraping arm 40 which are respectively used for contacting the inner side wall of the mixing batching pot 28 are eccentrically rotated at the lower end of the feeding lifting hand 38; a feeding straight scraping plate 43 for contacting the inner side wall is arranged at the lower end of the feeding scraping arm 40, a feeding front inclined opening 41 is arranged above the feeding straight scraping plate 43, a feeding bottom inclined surface 44 with a higher outer side and a lower back is arranged horizontally at the lower end of the feeding straight scraping plate 43, a feeding back inclined surface 42 which is wider at the top and narrower at the bottom is arranged at the upper end of the other side of the feeding bottom inclined surface 44, a feeding side lower inclined surface 45 with a higher outer side and a lower back is arranged on the forward side of the feeding scraping arm 40, a feeding robotic arm 46 is arranged above the feeding station 36, a feeding fixed inclined block 48 is arranged at the lower end of the feeding robotic arm 46, a feeding inclined rotating shaft 47 is vertically rotated on the inclined surface of the feeding fixed inclined block 48, a feeding rotating inclined block 49 is rotatably arranged on the feeding inclined rotating shaft 47, the feeding rotating inclined block 49 is connected with a feeding clamping arm 50, and a feeding ladle 51 for taking out the base sample of the mixing batching pot 28 is arranged at the end of the feeding clamping arm 50;

[0084] The mold closing device 5 includes a mixing conveyor belt 52 which is transversely arranged and pre-installed with a mixing carrier 54, on which a mixing delivery station 53 for delivering a mixed mold 55 onto the mixing carrier 54, a compaction station 56 having a compaction table and corresponding to the delivery station 36, a glue scraping station 57 for attaching sand-clearing glue to the mold shape, a maintenance station 58 for closing and maintaining the mold, and a demolding sampling station 59 are arranged in sequence.

[0085] The manufacturing process of the comparative cement-based sample for detecting the activity index of slag powder in this embodiment has the following specific steps: S1, the feeding device 1 separates and stores each component material according to the material screening;

[0086] S2, batching device 2 stores each component material quantitatively according to mesh size;

[0087] S3, the mixing device 3 adds the materials into the prefabricated aqueous solution according to the mesh size and stirs;

[0088] S4, the feeding device 4 quantitatively takes out the material from the mixing device 3;

[0089] S5, the mold clamping device 5 places a certain amount of material into the mold for compaction.

[0090] In S1-S2, first, the material falls to the feeding outlet 11 through the feeding channel 6, and the feeding vertical auger 9 breaks up the falling material. A feeding exhaust fan 10 is arranged above the feeding vertical auger 9 to extract the falling dust; then, the feeding connection spring rod 61 drives the feeding guide block 60 to rise and fall in linkage, drives the feeding transverse push rod 18 to move longitudinally in the feeding transverse channel 17, and the feeding pre-screening layer net 12 and the layered screen net 21 swing up and down, so that the material moves forward. At the same time, the material falls step by step, and large particles are stored in the feeding pre-screening layer net 12. , small particles are stored in the falling debris collection frame 22 and dried by the dryer; again, the feeding blocking brush 14 blocks the forward material for temporary storage; then, the material overflows and passes through the feeding gap 15 to move forward. When the material blocked by the feeding blocking brush 14 is screened, the feeding blocking brush 14 leaves, allowing the material to move forward; then, the batching layered quantitative storage tank 24 receives the material at the lower end of the corresponding feeding delivery channel 19 output end, and measures it through the gravity sensor, driving the batching lower baffle 25 to adjust the amount of material falling;

[0091] In S3, first, the corresponding layered quantitative storage tank 24 of the batching device 2 rotates to above the mixing station 30; then, the mixing L lifting hand 31 lifts the mixing batching pot 28 upward; secondly, the mixing lower head 34 moves downward to open the batching lower baffle 25, and falls from the mixing hopper 33 into the mixing batching pot 28; thirdly, the mixing stirring paddle 32 stirs the mixing batching pot 28.

[0092] In S4, first, the feeding turntable 35 receives the mixing batching pan 28 and rotates it to the feeding station 36; then, the feeding eccentric stirring paddle 37 stirs the mixing batching pan 28; next, the feeding lifting hand 38 descends, the feeding inclined rotating shaft 47 drives the feeding rotating inclined block 49 to rotate in a conical trajectory, and the feeding ladle 51 takes out the base sample of the mixing batching pan 28;

[0093] In S5, first, the mixing die 55 is fed onto the mixing carrier 54 at the mixing upper-tire station 53; then, at the compaction station 56, the feeding ladle 51 feeds the base sample of the mixing batching pan 28 into the mixing die 55 and compacts it; next, at the scraping glue station 57, the outer shape of the die is attached with cleaning sand glue; again, at the maintenance station 58, the die is closed and maintained; after that, the demolding and sampling station 59 demolds the mixing die 55.

[0094] The present invention realizes fine screening through the feeding device 1, quantitative grading and conveying through the batching device 2, mixing of cement-based samples through the mixing device 3, simulates the manual scooping of cement into the feeding device 4, realizes shaping and ramming through the mold clamping device 5, specifically discharges dust through the feeding waste discharge port 8, the feeding vertical auger 9 contacts the material to break the material, the feeding exhaust fan 10 is used to discharge dust, the feeding output port 11 realizes discharging, the feeding pre-screening layer net 12 can swing in multiple levels simultaneously, the feeding retaining roller 13 realizes blocking and buffering, the feeding blocking brush 14 realizes flexible blocking and cleaning, the feeding through-gap 15 process is reasonable, the feeding horizontal channel 17, the feeding horizontal push rod 18, the feeding guide block 60, the feeding connecting spring rod 61, and the feeding bottom buffer spring 62 realize buffer linkage control of vibration, the feeding terminal baffle 20 realizes quantitative blocking, the layered sieve net 21 can be multi-level, the falling miscellaneous material collection frame 22 realizes the collection of small particles, the batching rotating frame 23 drives the batching layered quantitative storage tank 24 to reach the corresponding position one by one, the batching lower baffle 25 realizes discharging downward, the mixing conveyor belt 26 realizes conveying, the mixing batching pot 28 has a large opening for convenient removal of cement, the mixing support hand 29 realizes lifting, the mixing station 30 realizes comprehensive operation, the mixing L-lifting hand 31 lifts upward, the mixing stirring paddle 32 realizes stirring, the mixing hopper 33 realizes guiding, the mixing lower top head 34 realizes opening, the feeding rotating frame 35 realizes process connection, the feeding eccentric stirring paddle 37 realizes stirring, the feeding inclined dialing arm 39 realizes overall stirring, the feeding scraping arm 40 realizes scraping glue when descending, a major invention point of the present invention is to realize efficient, low-resistance, and low-adhesion scraping glue through the feeding front inclined port 41, the feeding back inclined surface 42, the feeding straight scraping plate 43, the feeding bottom inclined surface 44, and the feeding side lower inclined surface 45, the feeding inclined rotating shaft 47, the feeding fixed inclined block 48, the feeding rotating inclined block 49, and the feeding clamping arm 50 control the feeding ladle 51 to imitate the human hand, the ladle faces upward when at the bottom and faces downward when at the top so that the cement drops, the mixing conveyor belt 52 realizes the connection of processes such as the mixing and tire mounting station 53, the mixing carrier 54, the mixing mold 55, the compaction station 56, the scraping glue station 57, the curing station 58, and the demolding and sampling station 59, and the supporting equipment and mold tooling are conventional parts, which is convenient for cost reduction.

[0095] As an improvement:

[0096] (1). Compare the cement material composition:

[0097] Portland cement clinker 24 Kg; citric acid residue 1.5 Kg; limestone 1.8 Kg; volcanic rock 1.5 Kg; fly ash 1.2 Kg; cement modifier 9 g.

[0098] (2). Material requirements: The materials used should be from fixed manufacturers, and the attached moisture is less than 0.2%.

[0099] Portland cement clinker: The content of C3S + C2S is 75.5% ± 0.5%, f-CaO: ≤ 1.0%, loss on ignition ≤ 1.0%, alkali content ≤ 0.6%, 3-day compressive strength ≥ 30 MPa, 28-day compressive strength ≥ 55 MPa.

[0100] Citric acid residue: The content of SO3 is 45% ± 1%.

[0101] Limestone: The content of CaO ≥ 45%, the content of AL2O3 ≤ 2.5%, the content of MgO ≤ 3.0%, the alkali content ≤ 0.6%.

[0102] The activity index of volcanic rock and fly ash ≥ 70%, and the alkali content of fly ash ≤ 0.6%.

[0103] (3) Manufacturing process:

[0104] Crush various materials to a particle size less than 0.5 cm. After mixing evenly, pour them into a test small mill of 500 cm × 500 cm, grind for 38 minutes, pour out the materials, pass through a 0.9 mm square-hole sieve, and store them sealed after cooling to room temperature.

[0105] (4) The reference cement meets the following requirements:

[0106] Specific surface area: 380 m2 / Kg ± 10 m2 / Kg; SO3: 2.6% ± 0.1%; alkali content: 0.6% ± 0.1%; 3-day compressive strength 28 ± 1 MPa, 7-day compressive strength 40 ± 1 MPa, 28-day compressive strength 52 ± 2 MPa.

[0107] Test procedure:

[0108] Add water to the pot, then add the sample. Place the pot on the fixed rack, raise it to the stirring position, and then immediately start the machine. After rotating at low speed for 30 s, start adding sand evenly at the same time as the start of the second 30 s. When each level of sand is packed separately, start from the coarsest particle size level and add the required amount of each level of sand in sequence. Turn the machine to high speed and stir for another 30 s, then stop stirring for 90 s. Use a rubber scraper to scrape the mortar on the blades and the pot wall into the middle of the pot within the first 15 s, and continue to stir at high speed for 60 s. For each stirring stage, the time error should be within ±1 s.

[0109] The mortar shall be molded immediately after preparation. Fix the empty mold and the mold sleeve on the vibrating table with a fixture. Directly scoop the mortar from the mixing pan into the mold in two layers with a suitable spoon. When loading the first layer, about 300 g of mortar is placed in each groove. Place the large spreading tool vertically on top of the mold sleeve and level the layer of material back and forth along each mold groove. Then vibrate 60 times. Then load the second layer of mortar, level it with the small spreading tool, and vibrate 60 times again. Loosen the fixture, remove the mold sleeve, take the mold off the vibrating table. Place a metal leveling layer at an angle of nearly 90 degrees at one end of the top of the mold, and then slowly move it to the other end in a transverse sawing motion along the length of the mold, scraping off the mortar that exceeds the mold at one time, and leveling the surface of the specimen with the same straightedge in a nearly horizontal position.

[0110] Remove the mortar remaining around the mold. Immediately place the marked mold on the horizontal grid in the fog storage or curing box for curing. The wet air should be able to contact all sides of the mold. During curing, the mold should not be placed on other molds. Cure until the specified demolding time and then take it out for demolding. Before demolding, number the specimen or make other marks with waterproof ink or other pigment pens. For specimens with more than two ages, when numbering, the three specimens in the same mold should be divided into more than two ages.

[0111] Demolding should be very careful. For specimens with a 24-hour age, demold within 20 minutes before breaking. For specimens with an age of more than 24 hours, demold between 20 - 24 hours after molding (if curing for 24 hours will damage the strength due to demolding, demolding can be delayed until after 24 hours, but it should be stated in the test report). The demolded specimens that have been used for the 24-hour age test (or other tests without being immersed in water directly) should be covered with a wet cloth until the test is conducted.

[0112] Immediately place the marked specimens horizontally or vertically in the curing water at 20 ± 1°C for curing. When placed horizontally, the scraping surface should face up. The specimens should be placed on a non-decaying grid and kept at a certain distance from each other to allow water to contact all six faces of the specimens. During curing, the distance between specimens or the water depth on the upper surface of the specimen should not be less than 5 mm. Except for specimens with a 24-hour age or specimens demolded after being delayed to 48 hours, any specimens at the age should be taken out of the water 15 minutes before the breaking test, wipe off the sediment on the surface of the specimen, and cover it with a wet cloth until breaking.

[0113] Calculation of the activity index of slag powder

[0114] A = R0 × 100 / R

[0115] Where: A represents the activity index of slag powder; R0 represents the compressive strength of the reference mortar; R represents the compressive strength of the test mortar.

[0116] The present invention is fully described for a clearer disclosure, and the prior arts are not listed one by one.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. As is obvious to those skilled in the art, multiple technical solutions of the present invention can be combined. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A feeding device for a comparative cement manufacturing device for detecting the activity index of slag powder, characterized in that: It is used to screen, separate and store each component material; the feeding device (1) includes a vertically arranged feeding channel (6); At the upper end of the feeding channel (6), a feeding inlet (7) and a feeding waste outlet (8) are respectively arranged; at the feeding waste outlet (8), a vertical feeding auger (9) is arranged at the feeding inlet (7) to disperse the falling materials; above the vertical feeding auger (9), a feeding exhaust fan (10) is arranged to extract the falling dust; at the lower end of the feeding channel (6), a feeding output port (11) is arranged, and the input end of a feeding pre-screening layer mesh (12) is hinged at the feeding output port (11); the feeding pre-screening layer mesh (12) is used to place particles with a size larger than the set mesh aperture; At the lower end of the input end of the feeding pre-screening layer mesh (12), a layered screen mesh (21) is hinged in layers, and a falling miscellaneous material collection box (22) is arranged below the lowermost layered screen mesh (21); the layered screen mesh (21) has the same structure as the feeding pre-screening layer mesh (12); The mesh of the layered screen mesh (21) gradually becomes smaller downward; the layered screen mesh (21) is equipped with a dryer; In the layered screen mesh (21) and the feeding pre-screening layer mesh (12), feeding blocking rollers (13) are horizontally distributed, and a number of groups of feeding blocking brushes (14) are arranged on the feeding blocking rollers (13). A feeding passing gap (15) is arranged between the feeding blocking brushes (14) and the feeding blocking rollers (13) to allow the materials to move forward; at the output end of the layered screen mesh (21), a feeding discharge port (16) is arranged, and a feeding transverse channel (17) is longitudinally arranged at the feeding discharge port (16); a feeding transverse push rod (18) moves longitudinally in the feeding transverse channel (17), and a vibration-driven feeding delivery channel (19) is horizontally arranged outside the feeding discharge port (16), and a feeding terminal baffle (20) is arranged at the output end of the feeding delivery channel (19); The inlet of the feeding delivery channel (19) is at the lower swing end of the layered screen mesh (21); At the end of the feeding transverse push rod (18) of each layer, a feeding guide block (60) is sleeved, a feeding connecting spring rod (61) is directly connected to each feeding guide block (60), and a feeding bottom buffer spring (62) is arranged below the output end of the layered screen mesh (21).

Images