CN112129607A - Device and process for manufacturing contrast cement base sample for detecting slag powder activity index - Google Patents
Device and process for manufacturing contrast cement base sample for detecting slag powder activity index Download PDFInfo
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- CN112129607A CN112129607A CN202011045988.5A CN202011045988A CN112129607A CN 112129607 A CN112129607 A CN 112129607A CN 202011045988 A CN202011045988 A CN 202011045988A CN 112129607 A CN112129607 A CN 112129607A
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Abstract
The invention relates to a device and a process for manufacturing a comparative cement base sample for detecting the activity index of slag powder, wherein the base sample comprises the following components in parts by weight: portland cement clinker: citric acid residues: limestone: volcanic rock: fly ash: the cement modifier is 24: 1.5: 1.8: 1.5: 1.2: 0.009; the attached moisture of each group is less than 0.2%; portland cement clinker: 75.5% + -0.5% of C3S + C2S, f-CaO: less than or equal to 1.0 percent, less than or equal to 1.0 percent of ignition loss, less than or equal to 0.6 percent of alkali, more than or equal to 30 MPa in 3-day compressive strength and more than or equal to 55 MPa in 28-day compressive strength; citric acid residues: the content of SO3 is 45% +/-1%; the invention has reasonable design, compact structure and convenient use.
Description
Technical Field
The invention relates to a device and a process for manufacturing a comparative cement-based sample for detecting the activity index of slag powder.
Background
Slag powder is a high-quality cement admixture ground from granulated blast furnace slag and has been widely used in the field of building materials. An important index for evaluating slag powder is the activity index. The slag powder activity index test method is specified in standard appendix A of GB/18046-2017 granulated blast furnace slag powder for use in cement, mortar and concrete. The comparative cement requirements are as follows: portland cement or ordinary Portland cement with the strength grade of 42.5 which conforms to GB175 regulations, the compressive strength of 25-35 MPa in 3 days, the compressive strength of 35-45 MPa in 7 days, the compressive strength of 50-60 MPa in 28 days, the specific surface area of 350-400m2/Kg, the content of sulfur trioxide is 2.3-2.8 percent, and the content of alkali is 0.5-0.9 percent. Because the required range of the contrast cement is wider, the contrast cement used by different slag powder users and different inspection mechanisms is different. In the routine inspection process of the slag powder, different inspection results appear on the same slag powder sample, or larger inspection errors appear on different slag powder samples due to different comparative cements, and unqualified quality inspection results or product quality complaints can be caused in serious cases.
Disclosure of Invention
The invention aims to solve the technical problem of providing a device and a process for manufacturing a comparative cement-based sample for detecting the activity index of slag powder.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a manufacturing process of a comparative cement base sample for detecting the activity index of slag powder comprises the following components in parts by weight: portland cement clinker: citric acid residues: limestone: volcanic rock: fly ash: the cement modifier is 24: 1.5: 1.8: 1.5: 1.2: 0.009;
the attached moisture of each group is less than 0.2%;
portland cement clinker: 75.5% + -0.5% of C3S + C2S, f-CaO: less than or equal to 1.0 percent, less than or equal to 1.0 percent of ignition loss, less than or equal to 0.6 percent of alkali, more than or equal to 30 MPa in 3-day compressive strength and more than or equal to 55 MPa in 28-day compressive strength;
citric acid residues: the content of SO3 is 45% +/-1%;
limestone: the content of CaO is more than or equal to 45 percent, the content of AL2O3 is less than or equal to 2.5 percent, the content of MgO is less than or equal to 3.0 percent, and the content of alkali is less than or equal to 0.6 percent;
the activity index of volcanic rock and fly ash is more than or equal to 70 percent, wherein the content of alkali in the fly ash is less than or equal to 0.6 percent;
step one, prefabricating each component material; firstly, preparing each component material; then, the various materials were crushed to a particle size of less than 0.5 cm.
As a further improvement of the above technical solution:
mixing, pouring into a small test mill of 500cm × 500cm, grinding for 38 min, pouring out, sieving with 0.9mm square sieve, cooling to room temperature, and sealing;
step two, preparing the mortar; firstly, adding water into a pot, and then adding the sample obtained in the first step; then, the pot is placed on a fixed frame and then is lifted to a stirring position for low-speed stirring; then, uniformly adding sand, wherein when each grade of sand is subpackaged, the required sand amount of each grade is added in turn from the coarsest grade, the machine is rotated to high speed for stirring, the stirring is stopped at regular time, and a rubber scraper is used for scraping the rubber sand on the blades and the pot wall into the middle of the pot;
step three, molding; firstly, fixing an empty test mold and a mold sleeve on a compaction table by using a fixture, directly loading mortar into the test mold from a stirring pot in two layers by using a seed, placing the mortar in each groove when loading a first layer, vertically erecting the mortar on the top of the mold sleeve by using a large spreader, and spreading and compacting a material layer back and forth along each mold groove once; then, a second layer of mortar is filled, and a small seeder is used for seeding and compacting; then, loosening the fixture, removing the die sleeve, taking down the test die from the compaction table, and using a metal leveling layer to be supported at one end of the top of the test die at an angle close to 90 degrees; then, the test piece is slowly moved to the other end by transverse sawing action along the length direction of the test mold, the glue sand exceeding the test mold part is scraped off at one time, and the surface of the test piece is smoothed by using the same straight ruler under the condition of being nearly horizontal;
step four, firstly, removing the mortar remained around the mold, placing the marked test mold on a horizontal grate in a fog storehouse or a curing box for curing, wherein wet air can be in contact with each side of the test mold, the test mold cannot be placed on other test molds during curing, taking out the test mold after curing until the specified demolding time, numbering or marking the test bodies by waterproof ink or other pigment pens before demolding, and classifying three test bodies in the same test mold into more than two age periods during numbering;
step five, demolding; demoulding within 20min before breaking for the age of 24h, and demoulding within 20-24h after moulding for the age of more than 24 h; the demoulded test body which is used for 24h age test is covered by wet cloth until the test is carried out;
step six, horizontally or vertically placing the marked test piece in 20 +/-1 ℃ curing water for curing, wherein when the test piece is horizontally placed, the scraping surface is upward, the test piece is placed on the grate and keeps a certain distance between the test pieces so as to enable water to be in contact with six surfaces of the test piece, and the condition is that the distance between the test pieces or the water depth of the upper surface of the test piece is not less than 5mm during curing; for the test bodies aged 24h or demoulded after being delayed to 48h, any test body aged to be taken out of water 15min before the breaking test, the surface sediment of the test body is wiped off, and the test body is covered by a wet cloth until the breaking test is finished;
step seven, calculating the activity index of the slag powder
A=R0×100/R
Wherein: a represents the activity index of the slag powder; r0 represents comparative mortar compressive strength; r represents the compressive strength of the tested mortar.
A contrast cement manufacturing device for detecting the activity index of slag powder comprises
The feeding device is used for screening, separating and storing the component materials according to the materials;
the batching device is used for quantitatively storing each component material according to the mesh number;
the mixing device is used for adding the materials into the prefabricated aqueous solution in a grading manner according to the mesh number and stirring the materials;
a feeding device for quantitatively taking out the materials from the mixing device;
and/or the mold closing device is used for placing the quantitative material into the mold for compaction molding.
As a further improvement of the above technical solution:
the feeding device comprises a feeding channel which is vertically arranged;
the upper end of the feeding channel is respectively provided with a feeding inlet and a feeding waste discharge port; a feeding vertical auger positioned at the feeding inlet on the feeding waste discharge port to scatter falling materials; a feeding exhaust fan is arranged above the feeding vertical auger to extract falling dust; a feeding output port is arranged at the lower end of the feeding channel, and an input end of a feeding pre-screening layer net is hinged to the feeding output port; feeding a pre-screening layer net to place particles with the particle size larger than the set mesh aperture;
a layering screen is hinged to the lower end of the input end of the feeding pre-screening layer net in a layering mode, and a falling sundry collecting frame is arranged below the layering screen at the lowest layer; the layered screen and the feeding pre-screening layer have the same structure;
the mesh of the layering screen gradually becomes smaller downwards; the layered screen is provided with a dryer;
a feeding blocking roller is transversely distributed in the layered screen and the feeding pre-screening layer net, a plurality of groups of feeding blocking brushes are arranged on the feeding blocking roller, and a feeding passing gap is arranged between the feeding blocking brushes and the feeding blocking roller so as to move forwards through materials; a feeding outlet is arranged at the output end of the layered screen, and a feeding transverse channel is longitudinally arranged at the feeding outlet; a feeding transverse push rod is longitudinally and movably arranged in the feeding transverse channel, a feeding delivery channel driven by vibration is transversely arranged outside the feeding outlet, and a feeding terminal baffle is arranged at the output end of the feeding delivery channel;
the inlet of the feeding and discharging channel is arranged at the lower end of the layering screen;
the end part of the feeding transverse push rod of each layer is sleeved with a feeding guide block, the feeding guide block of each layer is directly connected with a feeding connecting spring rod, and a feeding bottom buffer spring is arranged below the output end of the layered screen;
the batching device comprises batching layered quantitative storage tanks which are arranged on the batching rotary frame in a layered and staggered manner, are connected through a cross arm and are provided with gravity sensors, and batching lower baffles are arranged at the lower ends of the batching layered quantitative storage tanks;
the batching layering ration storage jar corresponds with the material loading delivery channel output that corresponds.
A mixing device comprising a mixing conveyor; a mixed belt process gap is arranged on the mixed conveying belt; a mixing tank feeding station and a mixing station are arranged on the mixing conveyor belt;
a mixing and batching pot is conveyed on the mixing and conveying belt, and a mixing support hand is arranged on the mixing and batching pot; a mixing lower top head and a mixing stirring paddle are arranged above the mixing batching pot; a mixing hopper is arranged below the mixing lower ejector;
a mixing L lifting hand is arranged at the mixing station to lift the mixing batching pot;
the feeding device comprises a feeding rotary frame, one end of the feeding rotary frame is arranged at the process gap of the mixing belt of the mixing station to receive the mixing batching pot and rotationally feed the mixing batching pot to the feeding station; a feeding eccentric stirring paddle and a feeding lifting hand are arranged above the feeding station in a lifting manner;
a feeding inclined shifting arm and a feeding scraping arm which are respectively used for contacting the inner side wall of the mixing and batching pot are eccentrically and rotatably arranged at the lower end of the feeding lifting hand; a feeding straight scraper for contacting the inner side wall is arranged at the lower end of the feeding scraping arm, a feeding front bevel is arranged above the feeding straight scraper, a feeding bottom inclined plane is arranged at the lower end of the feeding straight scraper in the transverse direction, the height of the feeding bottom inclined plane is higher than the height of the feeding back inclined plane, the width of the feeding back inclined plane is narrower than the width of the feeding back inclined plane, a feeding side lower inclined plane is arranged at the outer height of the feeding scraping arm, the advancing side of the feeding scraping arm is inclined, a feeding mechanical arm is arranged above a feeding station, a feeding fixed inclined block is arranged at the lower end of the feeding mechanical arm, a feeding inclined rotating shaft is vertically rotated on the inclined plane of the feeding fixed inclined block, a feeding rotating inclined block is rotatably arranged on the feeding inclined rotating shaft, the feeding rotating inclined block is connected with a feeding clamping arm, and a feeding;
the mold closing device comprises a hybrid conveyor belt which is transversely provided with a pre-installed hybrid carrier, and a hybrid feeding tire feeding station, a compaction station, a glue scraping station, a maintenance station and a demolding sampling station are sequentially arranged on the hybrid conveyor belt, wherein the hybrid feeding tire feeding station is used for feeding a hybrid mold onto the hybrid carrier, the compaction station is provided with a compaction table and corresponds to the feeding station, the glue scraping station is used for adhering clear sand glue to the appearance of the mold, and the maintenance station and the demolding sampling station are used for closing and maintaining the mold.
A manufacturing process of a comparative cement-based sample for detecting the activity index of slag powder, which comprises the following steps,
s1, screening, separating and storing the component materials according to the materials by a feeding device;
s2, quantitatively storing the component materials according to the mesh number by the batching device;
s3, adding the materials into the prefabricated aqueous solution according to the mesh number by a mixing device in a grading manner, and stirring;
s4, feeding the mixture into a device for quantitatively taking materials out of the mixing device;
and S5, placing the quantitative material into the mould by the mould closing device, and compacting and molding.
As a further improvement of the above technical solution:
in S1-S2, firstly, the material falls to a feeding output port through a feeding channel, a feeding vertical auger breaks up the falling material, and a feeding exhaust fan is arranged above the feeding vertical auger to extract falling dust; then, the feeding connecting spring rod drives the feeding guide block to lift in a linkage manner, a feeding transverse push rod is driven to move longitudinally in the feeding transverse channel, the feeding pre-screening layer net and the layering screen mesh swing up and down to enable the materials to move forwards, meanwhile, the materials fall step by step, large-particle objects are stored in the feeding pre-screening layer net, small-particle objects are stored in the falling sundry material collecting frame, and the small-particle objects are dried through a dryer; thirdly, the feeding blocking brush blocks and temporarily stores the materials going ahead; then, the materials overflow and move forward through the gap from the feeding, and after the materials blocked by the feeding blocking brush are screened, the feeding blocking brush leaves to enable the materials to move forward; then, the batching layered quantitative storage tank is arranged at the lower end of the output end of the corresponding feeding and sending channel to receive the materials, and the batching layered quantitative storage tank is used for measuring through a gravity sensor and driving a batching lower baffle plate to adjust the falling amount of the materials;
in S3, first, the respective batch layered quantitative storage tanks of the batching devices are rotated one by one above the mixing station; then, lifting the mixing pot by a lifting hand of the mixing L to ascend; secondly, the mixing lower ejector moves downwards to open the batching lower baffle plate, and falls into the mixing batching pot from the mixing hopper; and thirdly, stirring the mixing and proportioning pot by using a mixing and stirring paddle.
At S4, firstly, the feeding rotary frame receives the mixing material pot and rotates to send to the feeding station; then, feeding an eccentric stirring paddle to stir the mixing and proportioning pot; secondly, the feeding lifting hand descends, the feeding inclined rotating shaft drives the feeding rotating inclined block to rotate to move in a conical track, and the feeding scoop takes out the basic sample of the mixing and batching pot;
in S5, first, a hybrid mold is fed onto the hybrid carrier at a hybrid feeding and tire-loading station; then, feeding a scoop into a compaction station to feed the basic sample of the mixing and batching pot into a mixing mould and compacting; secondly, adhering sand removing glue to the appearance of the die at a glue scraping station; thirdly, at a maintenance station, closing the die and maintaining; and then, demolding the mixed mold by a demolding sampling station.
The invention has the advantages of reasonable design, low cost, firmness, durability, safety, reliability, simple operation, time and labor saving, capital saving, compact structure and convenient use. The invention makes the comparative cement-based sample have basically consistent chemical components and physical properties and can be preserved for a long time.
Due to the consistency of the result and the performance of the sample, larger detection errors caused by the inconsistency of the result and the performance of the comparative cement of the slag powder can be avoided.
Drawings
Fig. 1 is a schematic diagram of the use structure of the invention.
Fig. 2 is a schematic structural diagram of the feeding device of the invention.
Fig. 3 is a schematic view of the structure of the batching device according to the present invention.
Fig. 4 is a schematic structural diagram of the mixing device of the present invention.
FIG. 5 is a schematic view of the use of the delivery device of the present invention.
Fig. 6 is a schematic structural view of a mold clamping apparatus according to the present invention.
Wherein: 1. a feeding device; 2. a dosing device; 3. a mixing device; 4. a feeding device; 5. a mold clamping device; 6. a feeding channel; 7. a feeding inlet; 8. a feeding and waste discharging port; 9. feeding a vertical auger; 10. a feeding exhaust fan; 11. a feeding output port; 12. feeding a pre-screening layer net; 13. a feeding blocking roller; 14. a feeding blocking brush; 15. feeding through the gap; 16. a feeding outlet; 17. a feeding transverse channel; 18. a feeding transverse push rod; 19. a feeding discharge passage; 20. a feeding terminal baffle; 21. layering screen mesh; 22. a falling sundry material collecting frame; 23. a burden rotating frame; 24. a layered and quantitative storage tank for ingredients; 25. a material mixing lower baffle plate; 26. a mixing conveyor belt; 27. a hybrid tape process gap; 28. a mixing and batching pot; 29. mixing the supporting hands; 30. a mixing station; 31. mixing the L lifting hands; 32. mixing and stirring paddles; 33. a mixing hopper; 34. mixing the lower plug; 35. feeding the rotary frame; 36. feeding into a station; 37. feeding an eccentric stirring paddle; 38. feeding a lifting hand; 39. feeding an inclined shifting arm; 40. feeding a scraping arm; 41. feeding the material into a front bevel opening; 42. feeding a back bevel; 43. feeding a straight scraper; 44. feeding a bottom inclined plane; 45. a feeding side lower slope; 46. a feeding mechanical arm; 47. feeding an inclined rotating shaft; 48. feeding a fixed inclined block; 49. feeding a rotary inclined block; 50. feeding a clamping arm; 51. feeding a scoop; 52. a mixing conveyor belt; 53. mixed feeding to a tire mounting station; 54. a hybrid vehicle; 55. mixing a mold; 56. a compaction station; 57. a glue scraping station; 58. a maintenance station; 59. demolding and sampling stations; 60. a feeding guide block; 61. the feeding is connected with a spring rod; 62, a first step of mixing; and a material loading bottom buffer spring.
Detailed Description
As shown in FIGS. 1 to 6, the comparative cement manufacturing apparatus for detecting the activity index of slag powder of the present embodiment comprises
The feeding device 1 is used for screening, separating and storing the component materials according to the materials;
the batching device 2 is used for quantitatively storing each component material according to the mesh number;
the mixing device 3 is used for adding the materials into the prefabricated aqueous solution according to the mesh number in a grading manner and stirring;
a feeding device 4 for quantitatively taking out the materials from the mixing device 3;
and/or the mold closing device 5 is used for placing quantitative materials into the mold for compaction molding.
The feeding device 1 comprises a feeding channel 6 which is vertically arranged;
the upper end of the feeding channel 6 is respectively provided with a feeding inlet 7 and a feeding waste outlet 8; a feeding vertical screw conveyor 9 positioned at the feeding inlet 7 on the feeding waste discharge port 8 to break up falling materials; a feeding exhaust fan 10 is arranged above the feeding vertical auger 9 to extract falling dust; a feeding output port 11 is arranged at the lower end of the feeding channel 6, and an input end of a feeding pre-screening layer net 12 is hinged to the feeding output port 11; feeding a pre-screening layer net 12 to place particles with the particle size larger than the set mesh aperture;
a layering screen 21 is hinged to the lower end of the input end of the feeding pre-screening layer net 12 in a layering mode, and a falling sundry collecting frame 22 is arranged below the layering screen 21 at the lowest layer; the layered screen 21 has the same structure as the feeding pre-screening layer 12;
the layering screen 21 has gradually smaller meshes downwards; the layering screen 21 is provided with a dryer;
a feeding blocking roller 13 is transversely distributed in the layering screen 21 and the feeding pre-screening layer 12, a plurality of groups of feeding blocking brushes 14 are arranged on the feeding blocking roller 13, and a feeding passing gap 15 is arranged between the feeding blocking brushes 14 and the feeding blocking roller 13 so as to pass through the materials to move forwards; a feeding outlet 16 is arranged at the output end of the layering screen 21, and a feeding transverse channel 17 is longitudinally arranged at the feeding outlet 16; a feeding transverse push rod 18 is longitudinally and movably arranged in the feeding transverse channel 17, a feeding delivery channel 19 driven by vibration is transversely arranged outside the feeding outlet 16, and a feeding terminal baffle 20 is arranged at the output end of the feeding delivery channel 19;
the inlet of the feeding and discharging channel 19 is arranged at the lower end of the layering screen 21;
the end part of the feeding transverse push rod 18 of each layer is sleeved with a feeding guide block 60, the feeding guide block 60 of each layer is directly connected with a feeding connecting spring rod 61, and a feeding bottom buffer spring 62 is arranged below the output end of the layered screen 21;
the batching device 2 comprises batching layered quantitative storage tanks 24 which are arranged on a batching rotating frame 23 in a layered and staggered manner, are connected through a cross arm and are provided with gravity sensors, and batching lower baffle plates 25 are arranged at the lower ends of the batching layered quantitative storage tanks 24;
the layered quantitative storage tank 24 for the ingredients corresponds to the output end of the corresponding feeding and discharging channel 19.
A mixing device 3 comprising a mixing conveyor 26; a mixing belt process gap 27 is provided on the mixing conveyor belt 26; a mixing tank-loading station and a mixing station 30 are arranged on the mixing conveyor belt 26;
a mixing and batching pot 28 is conveyed on the mixing and conveying belt 26, and a mixing support 29 is arranged on the mixing and batching pot 28; a mixing lower top head 34 and a mixing stirring paddle 32 are arranged above the mixing and batching pot 28; a mixing hopper 33 is arranged below the mixing lower plug 34;
a mixing L lifting hand 31 is arranged at the mixing station 30 to lift the mixing and batching pot 28;
the feeding device 4 comprises a feeding rotary 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 rotationally feed 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 way;
a feeding inclined shifting arm 39 and a feeding scraping arm 40 which are respectively used for contacting the inner side wall of the mixing and batching pot 28 are eccentrically and rotatably arranged at the lower end of the feeding lifting hand 38; a feeding straight scraper 43 used for contacting the inner side wall is arranged at the lower end of the feeding scraper arm 40, a feeding front bevel opening 41 is arranged above the feeding straight scraper 43, a feeding bottom inclined plane 44 is arranged at the lower end of the feeding straight scraper 43 in the transverse direction with the height outside and the height outside, a feeding back inclined plane 42 with the width at the top and the width at the bottom is arranged at the upper end of the other side of the feeding bottom inclined plane 44, a feeding side lower inclined plane 45 is arranged on the inclined outer high back lower side of the front side surface of the feeding scraping arm 40, a feeding mechanical arm 46 is arranged above the feeding station 36, a feeding fixed inclined block 48 is arranged at the lower end of the feeding mechanical arm 46, a feeding inclined rotating shaft 47 vertically rotates on the inclined surface of the feeding fixed inclined block 48, a feeding rotary inclined block 49 is rotatably arranged on the feeding inclined rotating shaft 47, the feeding rotary inclined block 49 is connected with a feeding clamping arm 50, a feeding scoop 51 for taking out the basic sample of the mixing and batching pot 28 is arranged at the end part of the feeding and clamping arm 50;
the mold closing device 5 comprises a hybrid conveyor belt 52 which is transversely provided with a pre-installed hybrid carrier 54, and a hybrid feeding tire loading station 53 which is used for feeding a hybrid mold 55 onto the hybrid carrier 54, a compaction station 56 which is provided with a compaction table and corresponds to the feeding station 36, a glue scraping station 57 which is used for adhering sand cleaning glue to the appearance of the mold, a maintenance station 58 which is used for closing and maintaining the mold, and a demolding sampling station 59 are sequentially arranged on the hybrid conveyor belt 52.
The manufacturing process of the comparative cement-based sample for detecting the slag powder activity index of the embodiment specifically comprises the following steps,
s1, screening, separating and storing the component materials according to the materials by the feeding device 1;
s2, quantitatively storing the component materials according to the mesh number by the batching device 2;
s3, adding the materials into the prefabricated aqueous solution according to the mesh number by the mixing device 3 in a grading manner and stirring;
s4, feeding the device 4 to quantitatively take out the materials from the mixing device 3;
and S5, placing the quantitative material into the mould by the mould closing device 5, and compacting and molding.
In S1-S2, firstly, the material falls to a feeding output port 11 through a feeding channel 6, a feeding vertical auger 9 breaks up the falling material, and a feeding exhaust fan 10 is arranged above the feeding vertical auger 9 to extract the falling dust; then, the feeding connecting spring rod 61 drives the feeding guide block 60 to lift in a linkage manner, the feeding transverse push rod 18 is driven to move longitudinally in the feeding transverse channel 17, the feeding pre-screening layer net 12 and the layering screen 21 swing up and down to enable the materials to move forwards, meanwhile, the materials fall step by step, large particles are stored in the feeding pre-screening layer net 12, small particles are stored in the falling sundry material collecting frame 22, and drying is carried out through a dryer; thirdly, the feeding blocking hairbrush 14 blocks and temporarily stores the advancing materials; then, the materials overflow and move forward from the feeding through gap 15, and after the materials blocked by the feeding blocking brushes 14 are screened, the feeding blocking brushes 14 are separated, so that the materials move forward; then, the batching layering quantitative storage tank 24 is arranged at the lower end of the output end of the corresponding feeding and sending channel 19 to receive the materials, and the batching layering quantitative storage tank is used for measuring through a gravity sensor and driving a batching lower baffle 25 to adjust the falling amount of the materials;
in S3, first, the respective batch-by-batch layered quantitative storage tanks 24 of the batching device 2 are rotated above the mixing station 30; then, the mixing L lifting hand 31 lifts the mixing pot 28 to rise; next, the mixing lower head 34 moves downward to open the compounding lower flap 25, and falls from the mixing hopper 33 into the mixing batching pot 28; again, the mixing paddles 32 agitate the mixing and dosing kettle 28.
At S4, first, the feeding rotary rack 35 receives the mixing material pot 28 and rotates to the feeding station 36; then, the eccentric stirring paddle 37 is fed to stir the mixing and proportioning pot 28; secondly, the feeding lifting hand 38 descends, the feeding inclined rotating shaft 47 drives the feeding rotating inclined block 49 to rotate to move in a conical track, and the feeding scoop 51 takes out the basic sample of the mixing and batching pot 28;
in S5, first, the hybrid mold 55 is fed onto the hybrid carrier 54 at the hybrid-feeding/retreading station 53; then, at the tapping station 56, the feed scoop 51 feeds the base sample of the mixing and batching pot 28 into the mixing die 55 and taps it; secondly, adhering sand removing glue to the appearance of the die at a glue scraping station 57; thirdly, at the maintenance station 58, the mold is closed and maintained; thereafter, the mixed mold 55 is demolded by a demold sampling station 59.
The invention realizes fine screening through a feeding device 1, quantitative graded conveying through a batching device 2, mixing of cement base samples through a mixing device 3, feeding of cement into a device 4 simulating manual scooping, shaping and tamping through a mold closing device 5, dust discharge through a feeding and waste discharge port 8, contact of a feeding vertical auger 9 with materials for crushing the materials, a feeding exhaust fan 10 for discharging the dust, discharging through a feeding output port 11, simultaneous multi-stage swinging work of a feeding pre-screening layer net 12, blocking and buffering through a feeding blocking roller 13, flexible blocking and cleaning of a feeding blocking brush 14, reasonable process through a gap 15 for feeding, a feeding transverse channel 17, a feeding transverse push rod 18, a feeding guide block 60, a feeding connecting spring rod 61, a feeding bottom buffering spring 62, buffering linkage control vibration, quantitative blocking through a feeding terminal baffle 20, the layered screen 21 can be in multiple stages, the falling sundries collecting frame 22 realizes small particle collection, the batching rotary frame 23 drives the batching layered quantitative storage tanks 24 to reach corresponding positions one by one, the batching lower baffle plate 25 realizes lower discharge, the mixing conveyor belt 26 realizes conveying, the mixing batching pot 28 is provided with a large opening to conveniently remove cement, the mixing supporting hand 29 realizes supporting, the mixing station 30 realizes comprehensive operation, the mixing L lifting hand 31 lifts, the mixing stirring paddle 32 realizes stirring, the mixing hopper 33 realizes guiding, the mixing lower top 34 opens, the feeding rotary frame 35 realizes procedure connection, the feeding eccentric stirring paddle 37 realizes stirring, the feeding inclined shifting arm 39 realizes integral stirring, and the feeding scraping arm 40 realizes scraping glue when descending. The method comprises the following steps of low adhesion glue scraping, feeding of an inclined rotating shaft 47, feeding of a fixed inclined block 48, feeding of a rotary inclined block 49, control of a feeding scoop 51 by a feeding clamping arm 50 to imitate a hand of a person, upward facing of the scoop at the bottom and downward facing of the scoop at the top so that cement falls off, connection of technological processes of a mixed conveying belt 52, namely a mixed conveying upper tire station 53, a mixed carrier 54, a mixed mold 55, a compaction station 56, a glue scraping station 57, a maintenance station 58, a demolding sampling station 59 and the like is achieved, supporting equipment and mold tools are conventional, and cost reduction is facilitated.
As an improvement:
(1) and the composition of the comparative cement material is as follows:
24Kg of Portland cement clinker; 1.5Kg of citric acid residue; 1.8Kg of limestone; 1.5Kg of volcanic rock; 1.2Kg of fly ash; 9g of cement modifier.
(2) And material requirements are as follows: the used material should be fixed in manufacturers, and the attached moisture is less than 0.2%.
Portland cement clinker: 75.5% + -0.5% of C3S + C2S, f-CaO: less than or equal to 1.0 percent, less than or equal to 1.0 percent of ignition loss, less than or equal to 0.6 percent of alkali, more than or equal to 30 MPa in 3 days of compressive strength, and more than or equal to 55 MPa in 28 days of compressive strength.
Citric acid residues: the content of SO3 is 45% +/-1%.
Limestone: the content of CaO is more than or equal to 45 percent, the content of AL2O3 is less than or equal to 2.5 percent, the content of MgO is less than or equal to 3.0 percent, and the content of alkali is less than or equal to 0.6 percent.
The activity index of volcanic rock and fly ash is more than or equal to 70 percent, wherein the content of fly ash alkali is less than or equal to 0.6 percent.
(3) And a manufacturing process:
crushing the materials to a particle size of less than 0.5 cm. Mixing, pouring into a small test mill of 500cm × 500cm, grinding for 38 min, pouring out, sieving with 0.9mm square sieve, cooling to room temperature, and sealing for storage.
(4) The comparative cement meets the following requirements:
specific surface area: 380 m2/Kg +/-10 m 2/Kg; SO 3: 2.6% ± 0.1%; alkali content: 0.6% + -0.1%; the 3-day compressive strength is 28 +/-1 MPa, the 7-day compressive strength is 40 +/-1 MPa, and the 28-day compressive strength is 52 +/-2 MPa.
The test steps are as follows:
adding water into a pot, adding a sample, placing the pot on a fixed frame, lifting to a stirring position, immediately starting a machine, uniformly adding sand at the beginning of the second 30s after rotating at a low speed for 30s, sequentially adding the required sand amount of each grade from the coarsest grade when each grade of sand is subpackaged, rotating the machine to a high speed for stirring again for 30s, stopping stirring for 90s, scraping the blades and the glue sand on the pot wall into the middle of the pot by using a rubber scraper within the first 15s, and continuously stirring for 60s under high-speed stirring, wherein the time error is within +/-1 s in each stirring stage.
Molding immediately after the preparation of the mortar, fixing an empty test mold and a mold sleeve on a compaction table by using a fixture, directly loading the mortar into the test mold from a stirring pot in two layers by using a proper spoon, placing 300g of the mortar in each groove when loading the first layer, vertically erecting the blank on the top of the mold sleeve by using a large feeder, flatly seeding the material layer along each mold groove in one go and back time, compacting for 60 times, loading the second layer of the mortar, flatly seeding by using a small feeder, compacting for 60 times, loosening the fixture, removing the mold sleeve, taking the test mold from the compaction table, erecting a metal leveling layer at one end of the top of the test mold at an angle of nearly 90 degrees, then slowly moving towards the other end by using transverse sawing along the length direction of the test mold, once scraping off the mortar exceeding the test mold part, and flatly plastering the surface of the test body under the condition of nearly horizontal by using the same ruler,
and removing the mortar remained around the mold, immediately placing the marked test mold on a horizontal grate in a fog storehouse or a curing box for curing, wherein wet air can be contacted with each side of the test mold. The test molds are not required to be placed on other test molds during maintenance, the test molds are taken out for demolding until the specified demolding time, the test bodies are numbered or marked with other marks by waterproof ink or other pigment pens before demolding, and the test bodies with more than two ages are divided into three test bodies in the same test mold during numbering.
The demoulding is very careful, the demoulding is carried out within 20min before the mould breaking for the age of 24h, and the demoulding is carried out between 20 and 24h after the forming for the age of more than 24h (for example, the demoulding can be delayed to 24h after the curing of 24h and the damage to the strength caused by the demoulding, but the test report can show that the demoulding is carried out). The demoulded test pieces which have been tested for the 24h age (or other tests carried out without water) are covered with a wet cloth until the test is carried out.
And (3) immediately horizontally or vertically placing the marked test piece in curing water at the temperature of 20 +/-1 ℃ for curing, wherein the scraping surface is upward when the test piece is horizontally placed, and the test piece is placed on a non-rotten grate and keeps a certain distance from each other so as to enable water to be in contact with six surfaces of the test piece. The interval between the test pieces or the water depth of the upper surface of the test body during the curing process is not less than 5 mm. In the test bodies aged 24h or delayed to 48h for demoulding, any test body aged to be taken out of water 15min before the breaking test, the surface sediment of the test body is wiped off, and the test body is covered by a wet cloth until the breaking test is finished.
Slag powder activity index calculation
A=R0×100/R
Wherein: a represents the activity index of the slag powder; r0 represents comparative mortar compressive strength; r represents the compressive strength of the tested mortar.
The present invention has been described in sufficient detail for clarity of disclosure and is not exhaustive of the prior art.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; it is obvious as a person skilled in the art to combine several aspects of the invention. And such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A manufacturing process of a comparative cement-based sample for detecting the activity index of slag powder is characterized in that: the base sample comprises the following components in parts by weight: portland cement clinker: citric acid residues: limestone: volcanic rock: fly ash: the cement modifier is 24: 1.5: 1.8: 1.5: 1.2: 0.009;
the attached moisture of each group is less than 0.2%;
portland cement clinker: 75.5% + -0.5% of C3S + C2S, f-CaO: less than or equal to 1.0 percent, less than or equal to 1.0 percent of ignition loss, less than or equal to 0.6 percent of alkali, more than or equal to 30 MPa in 3-day compressive strength and more than or equal to 55 MPa in 28-day compressive strength;
citric acid residues: the content of SO3 is 45% +/-1%;
limestone: the content of CaO is more than or equal to 45 percent, the content of AL2O3 is less than or equal to 2.5 percent, the content of MgO is less than or equal to 3.0 percent, and the content of alkali is less than or equal to 0.6 percent;
the activity index of volcanic rock and fly ash is more than or equal to 70 percent, wherein the content of alkali in the fly ash is less than or equal to 0.6 percent;
step one, prefabricating each component material; firstly, preparing each component material; then, crushing the various materials until the granularity is less than 0.5cm, then, uniformly mixing, pouring into a test small mill of 500cm multiplied by 500cm, grinding for 38 minutes, pouring out the materials, sieving through a 0.9mm square sieve, cooling to room temperature, and then sealing and storing;
step two, preparing the mortar; firstly, adding water into a pot, and then adding the sample obtained in the first step; then, the pot is placed on a fixed frame and then is lifted to a stirring position for low-speed stirring; then, uniformly adding sand, wherein when each grade of sand is subpackaged, the required sand amount of each grade is added in turn from the coarsest grade, the machine is rotated to high speed for stirring, the stirring is stopped at regular time, and a rubber scraper is used for scraping the rubber sand on the blades and the pot wall into the middle of the pot;
step three, molding; firstly, fixing an empty test mold and a mold sleeve on a compaction table by using a fixture, directly loading mortar into the test mold from a stirring pot in two layers by using a seed, placing the mortar in each groove when loading a first layer, vertically erecting the mortar on the top of the mold sleeve by using a large spreader, and spreading and compacting a material layer back and forth along each mold groove once; then, a second layer of mortar is filled, and a small seeder is used for seeding and compacting; then, loosening the fixture, removing the die sleeve, taking down the test die from the compaction table, and using a metal leveling layer to be supported at one end of the top of the test die at an angle close to 90 degrees; then, the test piece is slowly moved to the other end by transverse sawing action along the length direction of the test mold, the glue sand exceeding the test mold part is scraped off at one time, and the surface of the test piece is smoothed by using the same straight ruler under the condition of being nearly horizontal;
step four, firstly, removing the mortar remained around the mold, placing the marked test mold on a horizontal grate in a fog storehouse or a curing box for curing, wherein wet air can be in contact with each side of the test mold, the test mold cannot be placed on other test molds during curing, taking out the test mold after curing until the specified demolding time, numbering or marking the test bodies by waterproof ink or other pigment pens before demolding, and classifying three test bodies in the same test mold into more than two age periods during numbering;
step five, demolding; demoulding within 20min before breaking for the age of 24h, and demoulding within 20-24h after moulding for the age of more than 24 h; the demoulded test body which is used for 24h age test is covered by wet cloth until the test is carried out;
step six, horizontally or vertically placing the marked test piece in 20 +/-1 ℃ curing water for curing, wherein when the test piece is horizontally placed, the scraping surface is upward, the test piece is placed on the grate and keeps a certain distance between the test pieces so as to enable water to be in contact with six surfaces of the test piece, and the condition is that the distance between the test pieces or the water depth of the upper surface of the test piece is not less than 5mm during curing; for the test bodies aged 24h or demoulded after being delayed to 48h, any test body aged to be taken out of water 15min before the breaking test, the surface sediment of the test body is wiped off, and the test body is covered by a wet cloth until the breaking test is finished;
step seven, calculating the activity index of the slag powder
A=R0×100/R
Wherein: a represents the activity index of the slag powder; r0 represents comparative mortar compressive strength; r represents the compressive strength of the tested mortar.
2. The utility model provides a contrast cement making devices that slag powder activity index detected which characterized in that: comprises that
The feeding device (1) is used for screening, separating and storing each component material according to materials;
the batching device (2) is used for quantitatively storing each component material according to the mesh number;
the mixing device (3) is used for adding the materials into the prefabricated aqueous solution in a grading manner according to the mesh number and stirring the materials;
a feeding device (4) for quantitatively removing the material from the mixing device (3);
and/or a mold closing device (5) for placing the quantitative material into the mold for compaction molding.
3. The apparatus for preparing a comparative cement-based sample for detecting slag powder activity index according to claim 2, wherein: the feeding device (1) comprises a feeding channel (6) which is vertically arranged;
the upper end of the feeding channel (6) is respectively provided with a feeding inlet (7) and a feeding waste discharge port (8); a feeding vertical screw conveyor (9) positioned at the feeding inlet (7) on the feeding waste discharge port (8) to break up falling materials; a feeding exhaust fan (10) is arranged above the feeding vertical auger (9) to extract falling dust; a feeding output port (11) is arranged at the lower end of the feeding channel (6), and an input end of a feeding pre-screening layer net (12) is hinged to the feeding output port (11); feeding a pre-screening layer net (12) to place particles with the particle size larger than the set mesh aperture;
a layering screen (21) is hinged to the lower end of the input end of the feeding pre-screening layer net (12) in a layering manner, and a falling sundry material collecting frame (22) is arranged below the layering screen (21) at the lowest layer; the layered screen (21) has the same structure as the feeding pre-screening layer net (12);
the layered screen (21) has meshes which are gradually reduced downwards; the layered screen (21) is provided with a dryer;
feeding baffle rollers (13) are transversely distributed in the layered screen (21) and the feeding pre-screening layer net (12), a plurality of groups of feeding baffle brushes (14) are arranged on the feeding baffle rollers (13), and a feeding passing gap (15) is arranged between the feeding baffle brushes (14) and the feeding baffle rollers (13) to pass through materials; a feeding outlet (16) is arranged at the output end of the layering screen (21), and a feeding transverse channel (17) is longitudinally arranged at the feeding outlet (16); a feeding transverse push rod (18) is longitudinally and movably arranged in the feeding transverse channel (17), a feeding and discharging channel (19) driven by vibration is transversely arranged outside the feeding outlet (16), and a feeding terminal baffle (20) is arranged at the output end of the feeding and discharging channel (19);
the inlet of the feeding and discharging channel (19) is arranged at the lower end of the layering screen (21);
the end part of the feeding transverse push rod (18) of each layer is sleeved with a feeding guide block (60), the feeding guide block (60) of each layer is directly connected with a feeding connecting spring rod (61), and a feeding bottom buffer spring (62) is arranged below the output end of the layered screen (21);
the batching device (2) comprises batching layered quantitative storage tanks (24) which are arranged on the batching rotating frame (23) in a layered and staggered manner, are connected through a cross arm and are provided with gravity sensors, and batching lower baffle plates (25) are arranged at the lower ends of the batching layered quantitative storage tanks (24);
the layered quantitative storage tank (24) for the ingredients corresponds to the output end of the corresponding feeding and sending channel (19).
4. The apparatus for preparing a comparative cement-based sample for detecting slag powder activity index according to claim 2, wherein:
a mixing device (3) comprising a mixing conveyor belt (26); a mixing belt process gap (27) is arranged on the mixing conveyor belt (26); a mixing tank feeding station and a mixing station (30) are arranged on the mixing conveyor belt (26);
a mixing and batching pot (28) is conveyed on the mixing and conveying belt (26), and a mixing support hand (29) is arranged on the mixing and batching pot (28); a mixing lower top head (34) and a mixing stirring paddle (32) are arranged above the mixing pot (28); a mixing hopper (33) is arranged below the mixing lower ejector (34);
a mixing L lifting hand (31) is arranged at the mixing station (30) to lift the mixing and batching pot (28);
the feeding device (4) comprises a feeding rotary frame (35) with one end arranged at a mixing belt process gap (27) of the mixing station (30) to receive the mixing batching pot (28) and rotationally feed the mixing batching pot to a 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 way;
a feeding inclined shifting arm (39) and a feeding scraping arm (40) which are respectively used for contacting the inner side wall of the mixing and batching pot (28) are eccentrically and rotatably arranged at the lower end of the feeding lifting hand (38); a feeding straight scraper blade (43) used for contacting the inner side wall is arranged at the lower end of the feeding scraping arm (40), a feeding front bevel (41) is arranged above the feeding straight scraper blade (43), a feeding bottom bevel (44) is arranged at the lower end of the feeding straight scraper blade (43) in the transverse direction, the height and the back are lower than each other, a feeding back bevel (42) with the width at the upper part and the width at the lower part is arranged at the upper end of the other side of the feeding bottom bevel (44), a feeding side lower bevel (45) is arranged at the outer side of the feeding scraping arm (40) in the inclined direction, a feeding mechanical arm (46) is arranged above the feeding station (36), a feeding fixed bevel block (48) is arranged at the lower end of the feeding mechanical arm (46), a feeding bevel shaft (47) vertically rotates on the bevel of the feeding fixed bevel block (48), a feeding rotating bevel block (49) rotatably arranged on the feeding bevel shaft (47), and the, a feeding scoop (51) for taking out the basic sample of the mixing and batching pot (28) is arranged at the end part of the feeding clamping arm (50);
the mold closing device (5) comprises a mixing conveyor belt (52) transversely provided with a pre-installed mixing carrier (54), wherein a mixed feeding tire feeding station (53) used for feeding a mixing mold (55) onto the mixing carrier (54), a compaction station (56) provided with a compaction table and corresponding to the feeding station (36), a glue scraping station (57) used for adhering sand cleaning glue to the appearance of the mold, a maintenance station (58) used for closing and maintaining the mold and a demolding sampling station (59) are sequentially arranged on the mixing conveyor belt (52).
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| CN202211113215.5A CN115308002A (en) | 2020-09-28 | 2020-09-28 | Assembly, device and process for detecting slag powder activity index and comparing cement base sample |
| CN202011045988.5A CN112129607B (en) | 2020-09-28 | 2020-09-28 | Device and process for manufacturing contrast cement base sample for detecting slag powder activity index |
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