CN111351730A - Device and method for measuring water absorption of recycled coarse aggregate for concrete - Google Patents
Device and method for measuring water absorption of recycled coarse aggregate for concrete Download PDFInfo
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- CN111351730A CN111351730A CN202010192498.1A CN202010192498A CN111351730A CN 111351730 A CN111351730 A CN 111351730A CN 202010192498 A CN202010192498 A CN 202010192498A CN 111351730 A CN111351730 A CN 111351730A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
- G01N5/025—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content for determining moisture content
Abstract
The invention relates to a device for measuring the water absorption of recycled coarse aggregate for concrete, which comprises a containing sieve, a lifting device, a soaking bucket, a drying device and a control system, wherein the containing sieve is arranged on the lifting device in a lifting manner, the soaking bucket is arranged below the containing sieve, the size of the soaking bucket is larger than that of the containing sieve, and the drying device is arranged above the containing sieve; the lifting device comprises a threaded rod and a sleeve, and a rotating motor and a translation motor are arranged at the end part of the threaded rod; the rotating motor and the translation motor are both connected with the control system, the threaded rod is externally provided with a limiting pipe, the sleeve is arranged in the limiting pipe, the side wall of the limiting pipe is provided with a limiting groove along the axial direction of the limiting pipe, the position of the sleeve corresponding to the limiting groove is provided with a horizontal rod which is horizontally arranged, and the horizontal rod is connected with the material containing sieve through a connecting rod. The device and the method for measuring the water absorption of the recycled coarse aggregate for the concrete have the advantages of simple structure and convenience in use, and can effectively solve the problems that the conventional measuring mode wastes time and labor and the surface of the coarse aggregate is not easy to dry.
Description
Technical Field
The invention relates to the technical field of recycled coarse aggregate water absorption rate determination, in particular to a device and a method for determining the water absorption rate of a recycled coarse aggregate for concrete.
Background
The concrete recycled coarse aggregate is prepared by processing concrete, mortar, stone, tiles and the like in construction waste, and is used for preparing concrete particles with the particle size of more than 4.75 mm. At present, the recycled concrete coarse aggregate mainly realizes selective recycling of waste concrete, and generally concrete blocks are crushed by a crusher, then conveyed to material and material reinforcing equipment for reinforcement, and finally screened by a vibrating screen to obtain the recycled coarse aggregate with the thickness of 5-25 mm. The water absorption of the recycled coarse aggregate for concrete is the mass percentage of water contained in the recycled coarse aggregate for concrete in a saturated dry state to the mass in an absolutely dry state. The conventional method for measuring the water absorption of the recycled coarse aggregate for concrete is to wipe the surface of the coarse aggregate by using a towel, then weigh the mass of the coarse aggregate (containing absorbed water) in a saturated surface dry state, subtract the mass of the recycled coarse aggregate in drying to obtain the water absorption, and divide the water absorption by the mass of the recycled coarse aggregate in drying to obtain the water absorption. The mode of wiping by adopting a towel is time-consuming and labor-consuming, and the surface of the coarse aggregate is not easy to dry. Therefore, it is necessary to design a new technical solution to comprehensively solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a device and a method for measuring the water absorption of a recycled coarse aggregate for concrete, which have simple structure and convenient use and can effectively solve the problems of time and labor waste and difficult drying of the surface of the coarse aggregate in the conventional measuring mode.
In order to solve the technical problems, the invention adopts the following technical scheme:
a device for measuring the water absorption of recycled coarse aggregate for concrete comprises a containing sieve, a lifting device, a soaking bucket, a drying device and a control system, wherein the containing sieve is arranged on the lifting device in a lifting manner, the soaking bucket is arranged below the containing sieve, the size of the soaking bucket is larger than that of the containing sieve, and the drying device is arranged above the containing sieve; the control system comprises a display screen and a processor with a timing function, the processor is electrically connected with the display screen, and the lifting device and the drying device are electrically connected with the processor;
the lifting device comprises a threaded rod and a sleeve, the threaded rod is vertically arranged, the sleeve is arranged on the threaded rod, a rotating motor used for rotating the threaded rod and a translation motor used for horizontally moving are arranged at the end part of the threaded rod, and the material containing sieve moves towards the drying device along with the translation motor; rotating electrical machines and translation motor all with the treater links to each other, the threaded rod is provided with spacing pipe outward, the sleeve pipe sets up in spacing intraductal, and the sleeve pipe sets up along threaded rod axial movable, spacing groove has been seted up along its axial to spacing tub of lateral wall, the sleeve pipe is provided with the horizontal pole of horizontal arrangement with the corresponding position department of spacing groove, the one end of horizontal pole is fixed on the sleeve pipe, the other end of horizontal pole pass through the connecting rod with it links to each other to hold the detachable of material sieve.
The drying device is a cylindrical drying box, an opening used for accommodating the material containing sieve is formed in the side face of the drying box, a rotary disc is arranged at the bottom of the inner side of the drying box, the material containing sieve is arranged in the drying box in a rotating mode through the rotary disc, and the drying box generates heat through a PTC heating body.
The technical scheme is that the material containing sieve is a cylindrical sieve made of stainless steel, the material containing sieve comprises a sieve bottom, a sieve edge and a sieve cover detachably arranged on the sieve edge, sieve holes are formed in the sieve bottom, the sieve edge and the sieve cover, and the pore diameter of each sieve hole is not larger than 2 mm.
The soaking device is characterized in that a barrel seat is arranged below the soaking barrel, a groove for placing the soaking barrel is formed in the upper surface of the barrel seat, the soaking barrel is arranged in the groove, and the depth of the soaking barrel is at least 2cm greater than the height of the material containing sieve.
And provides the measuring method of the apparatus for measuring the water absorption of the recycled coarse aggregate for concrete, comprising the following steps:
step S1, pretreatment, namely removing dust and impurities on the surface of the recycled coarse aggregate for the concrete, drying to constant weight, cooling to room temperature, weighing and recording m0Then placing the mixture in a material containing sieve for standby;
s2, soaking, namely adding water into a soaking barrel, adjusting a lifting device, controlling a material containing sieve to move downwards into the soaking barrel, wherein the material containing sieve is at least 2cm lower than the water surface, starting timing by a processor, and after soaking is finished, adjusting the lifting device, and controlling the material containing sieve to move upwards to be separated from the soaking barrel;
and S3, drying, namely moving the soaked material containing sieve into a drying device for drying operation to obtain recycled coarse aggregate for dry concrete of the saturated surface, and weighing and recording the recycled coarse aggregate as m1；
S4, calculating a formula according to the water absorption of the recycled coarse aggregate for the concrete
Wherein omega is the water absorption of the recycled coarse aggregate for concrete for 1 hour or 24 hours, and m0The weight of the dried sample is gram; m is1The mass of the soaked sample is given in grams.
Specifically, the water absorption was an arithmetic average of the measurement results obtained by repeating steps S1 to S4 3 times.
According to the device and the method for measuring the water absorption of the recycled coarse aggregate for the concrete, the recycled coarse aggregate for the concrete is loaded by the material containing sieve, the soaking barrel is used for soaking the recycled coarse aggregate for the concrete in the material containing sieve, the lifting device is arranged for automatically controlling the lifting of the material containing sieve (entering the soaking barrel or separating from the soaking barrel), and the drying device for drying the soaked material containing sieve is additionally arranged, so that the recycled coarse aggregate for the concrete can quickly reach a saturated surface dry state, and the problems of time and labor waste and difficulty in drying the surface of the coarse aggregate existing in the conventional towel drying mode are effectively solved; meanwhile, the whole device for measuring the water absorption of the recycled coarse aggregate for the concrete can only be controlled by adopting a control system, and the soaking time, the soaking depth and the drying time are regulated and controlled, so that the efficiency for measuring the water absorption of the recycled coarse aggregate for the concrete can be effectively improved.
In addition, the determination method of the device for determining the water absorption of the recycled coarse aggregate for the concrete only needs to weigh the recycled coarse aggregate for the concrete after pretreatment and drying, and other operations can be performed through the device for determining the water absorption of the recycled coarse aggregate for the concrete provided by the invention, so that the device is simple and convenient, the saturated surface dry state can be quickly achieved when the concrete is completely and punctually soaked, a blowing type drying mode is avoided, a material containing sieve arranged in the drying device is rotated in the drying process, the loss of the recycled coarse aggregate for the concrete can be effectively reduced, the saturated surface dry state is quickened to be achieved, and the accuracy of a weighing result is improved.
Drawings
FIG. 1 is a schematic structural view of a device for measuring water absorption of recycled coarse aggregate for concrete according to the present invention;
FIG. 2 is a schematic structural diagram of the lifting device of the present invention;
FIG. 3 is a schematic view of the drying apparatus according to the present invention;
fig. 4 is a partial structure enlarged view of the material containing sieve of the invention.
In the figure: 1. a threaded rod; 11. a sleeve; 12. a limiting pipe; 13. a cross bar; 14. a connecting rod; 15. a limiting block; 2. a material containing sieve; 21. screening edges; 22. a circular ring; 23. a ring groove; 24. a screen cover; 3. a soaking barrel; 4. a control system; 5. a drying oven; 51. an opening; 52. cover slot, 53, arc cover; 54. a turntable; 6. a base; 61. a chute; 7. a rotating electric machine.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed.
The technical scheme adopted by the invention is as shown in figure 1, the device for measuring the water absorption of the recycled coarse aggregate for concrete comprises a containing sieve 2, a lifting device, a soaking barrel 3, a drying device and a control system 4, wherein the containing sieve 2 is arranged on the lifting device in a lifting manner, the soaking barrel 3 is arranged below the containing sieve 2, the size of the soaking barrel 3 is larger than that of the containing sieve 2, and the drying device is arranged above the containing sieve 2; the control system 4 comprises a display screen and a processor with a timing function, the display screen is electrically connected with the processor, the lifting device and the drying device are electrically connected with the processor, and the processor records the soaking time of the sample through the timing function so as to reduce human errors and improve the accuracy of the measuring result.
As shown in fig. 2, the lifting device comprises a threaded rod 1 which is vertically arranged and a sleeve 11 which is arranged on the threaded rod 1, the end part of the threaded rod 1 is provided with a rotating motor 7 for rotating the threaded rod 1 and a translation motor for horizontal movement, and the material containing sieve 2 moves towards the drying device along with the translation motor; rotating electrical machines 7 and translation motor all link to each other with the treater, threaded rod 1 is provided with spacing pipe 12 outward, sleeve pipe 11 sets up in spacing pipe 12, and sleeve pipe 11 sets up along 1 axial movable of threaded rod, and the spacing groove has been seted up along its axial to spacing pipe 12 lateral wall, and sleeve pipe 11 is provided with the horizontal pole 13 of horizontal arrangement with the corresponding position department of spacing groove, and the one end of horizontal pole 13 is fixed on sleeve pipe 11, and the other end of horizontal pole 13 passes through connecting rod 14 and links to each other with flourishing material sieve 2 is detachable. Lifting device sets up on base 6 in this embodiment, has seted up spout 61 on base 6, and lifting device is rotatable and the translation is in spout 61, and the cross section of spout is cross in this embodiment, and the intermediate level can rotate for the threaded rod, sets up stopper 15 here in the bottom of threaded rod, and the lower extreme of stopper 15 sets up rotating electrical machines 7 to guarantee that the threaded rod can rotate. In addition, the sheathed tube cross section is regular hexagon, and the spacing groove setting is on one of them face, and here need guarantee that the sleeve pipe can hold in upper spout to guarantee that sleeve pipe intercommunication threaded rod can remove along spout groove length direction in the spout.
As shown in fig. 3, the drying device is a cylindrical drying box 5, an opening 51 for accommodating the material containing sieve 2 is formed in the side face of the drying box 5, a turntable 54 is arranged at the bottom of the inner side of the drying box 5, the bottom of the turntable is controlled by a rotating motor, the rotating speed of the rotating motor and the operating time are controlled by a control system, in addition, an arc cover 53 is further arranged at the opening and is semicircular, so that the material containing sieve can accurately enter the drying box, a cover groove 52 is further arranged at the position corresponding to the arc cover on the bottom face of the inner part of the drying box, the arc cover is matched with the cover groove for use, the material containing sieve can be prevented from being thrown out on the turntable due to overlarge centrifugal force, the material containing sieve 2 is rotatably arranged in the drying box 5 through the turntable 54, PTC heat-generating bodies are uniformly distributed.
With reference to fig. 1 and 4, the material containing sieve 2 is a cylindrical sieve made of stainless steel, the material containing sieve 2 includes a sieve bottom, a sieve edge 21 and a sieve cover 24 detachably disposed on the sieve edge 21, sieve holes are disposed on the sieve bottom, the sieve edge 21 and the sieve cover 24, the aperture of each sieve hole is not greater than 2mm, and the length of each sieve hole is 1.58mm in this embodiment; in this embodiment on the sieve limit equidistance interval be provided with three ring 22, set up annular 23 with the corresponding position of ring on the screen cover, after packing into the sample flourishing material sieve, cover the screen cover in the sieve limit through ring and annular, in addition, the connecting rod also is provided with threely in this embodiment, and the connecting rod keeps away from the one end tip of horizontal pole and is provided with the snak link, the snak link is used for hooking up and establishes on the ring that the lid closed, when realizing tightly closing flourishing material sieve, still be convenient for open and shut.
As shown in fig. 1, a base 6 is arranged below the soaking barrel 3, a groove (not shown) for placing the soaking barrel 3 is arranged on the upper surface of the base 6, the soaking barrel 3 is arranged in the groove, the depth of the soaking barrel 3 is at least 2cm greater than the height of the containing sieve 2, the groove can prevent the displacement of the soaking barrel, the stability of the device for measuring the water absorption of the recycled coarse aggregate for concrete is integrally improved, and the depth of the soaking barrel is deeper relative to the containing sieve, so that thorough and comprehensive soaking is ensured, and the soaking effect is improved.
And provides the measuring method of the apparatus for measuring the water absorption of the recycled coarse aggregate for concrete, comprising the following steps:
step S1, pretreatment, namely removing dust and impurities on the surface of the recycled coarse aggregate for the concrete, drying to constant weight, cooling to room temperature, weighing and recording m0Then placing the mixture in a material containing sieve for standby;
s2, soaking, namely adding water into a soaking barrel, adjusting a lifting device, controlling a material containing sieve to move downwards into the soaking barrel, wherein the material containing sieve is at least 2cm lower than the water surface, starting timing by a processor, and after soaking is finished, adjusting the lifting device, and controlling the material containing sieve to move upwards to be separated from the soaking barrel;
and S3, drying, namely moving the soaked material containing sieve into a drying device for drying operation to obtain recycled coarse aggregate for dry concrete of the saturated surface, and weighing and recording the recycled coarse aggregate as m1；
S4, calculating a formula according to the water absorption of the recycled coarse aggregate for the concrete
Wherein omega is the water absorption of the recycled coarse aggregate for concrete for 1 hour or 24 hours, and m0The weight of the dried sample is gram; m is1The mass of the soaked sample is given in grams.
Specifically, the water absorption in this example was an arithmetic average of the measurement results obtained by repeating steps S1 to S4 3 times.
According to the lightweight aggregate and the test method GB/T17431.2-2010, the test is carried out by using the recycled coarse aggregate for the concrete with the particle size of 5-16 mm:
three equal parts (1 Kg each) of the recycled coarse aggregate for the pretreated concrete are respectively weighed, the recycled coarse aggregate for the concrete is soaked for 24 hours by adopting the recycled coarse aggregate water absorption rate measuring device for the concrete, and then the recycled coarse aggregate for the concrete which reaches a saturated surface dry state is obtained by a drying device, and the mass is sequentially weighed as shown in the following table:
the device for measuring the water absorption of the recycled coarse aggregate for concrete can effectively reduce human errors, adopts the drying box to enable the recycled coarse aggregate for concrete to reach a saturated surface dry state, effectively solves the problems of time and labor waste and difficulty in drying the surface of the coarse aggregate in a towel drying mode in the background technology, and effectively improves the accuracy of a measurement result.
The present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent changes and substitutions without departing from the principle of the present invention after learning the content of the present invention, and these equivalent changes and substitutions should be considered as belonging to the protection scope of the present invention.
Claims (6)
1. A concrete recycled coarse aggregate water absorption rate measuring device is characterized in that: the drying device comprises a material containing sieve, a lifting device, a soaking barrel, a drying device and a control system, wherein the material containing sieve is arranged on the lifting device in a lifting manner, the soaking barrel is arranged below the material containing sieve, the size of the soaking barrel is larger than that of the material containing sieve, and the drying device is arranged above the material containing sieve; the control system comprises a display screen and a processor with a timing function, the processor is electrically connected with the display screen, and the lifting device and the drying device are electrically connected with the processor;
the lifting device comprises a threaded rod and a sleeve, the threaded rod is vertically arranged, the sleeve is arranged on the threaded rod, a rotating motor used for rotating the threaded rod and a translation motor used for horizontally moving are arranged at the end part of the threaded rod, and the material containing sieve moves towards the drying device along with the translation motor; rotating electrical machines and translation motor all with the treater links to each other, the threaded rod is provided with spacing pipe outward, the sleeve pipe sets up in spacing intraductal, and the sleeve pipe sets up along threaded rod axial movable, spacing groove has been seted up along its axial to spacing tub of lateral wall, the sleeve pipe is provided with the horizontal pole of horizontal arrangement with the corresponding position department of spacing groove, the one end of horizontal pole is fixed on the sleeve pipe, the other end of horizontal pole pass through the connecting rod with it links to each other to hold the detachable of material sieve.
2. The apparatus for measuring water absorption of recycled coarse aggregate for concrete according to claim 1, wherein: drying device is cylindric drying cabinet, the opening that is used for holding flourishing material sieve is seted up to the side of drying cabinet, the inboard bottom of drying cabinet is provided with the carousel, flourishing material sieve passes through the carousel is in the drying cabinet internal rotation sets up, the drying cabinet generates heat through the PTC heat-generating body.
3. The apparatus for measuring water absorption of recycled coarse aggregate for concrete according to claim 1, wherein: the material containing sieve is a cylindrical sieve made of stainless steel, comprises a sieve bottom, a sieve edge and a sieve cover which is detachably arranged on the sieve edge, sieve holes are formed in the sieve bottom, the sieve edge and the sieve cover, and the pore diameter of each sieve hole is not larger than 2 mm.
4. The apparatus for measuring water absorption of recycled coarse aggregate for concrete according to claim 1, wherein: the lower part of the soaking barrel is provided with a barrel seat, the upper surface of the barrel seat is provided with a groove for placing the soaking barrel, the soaking barrel is arranged in the groove, and the depth of the soaking barrel is at least 2cm greater than the height of the material containing sieve.
5. The method for measuring a water absorption rate of a recycled coarse aggregate for concrete according to claim 1, comprising the steps of:
step S1, pretreatment, namely removing dust and impurities on the surface of the recycled coarse aggregate for the concrete, drying to constant weight, cooling to room temperature, weighing and recording m0Then placing the mixture in a material containing sieve for standby;
s2, soaking, namely adding water into a soaking barrel, adjusting a lifting device, controlling a material containing sieve to move downwards into the soaking barrel, wherein the material containing sieve is at least 2cm lower than the water surface, starting timing by a processor, and after soaking is finished, adjusting the lifting device, and controlling the material containing sieve to move upwards to be separated from the soaking barrel;
s3, drying, namely moving the soaked material containing sieve into a drying device for dryingDrying to obtain recycled coarse aggregate for the dry concrete with the saturated surface, weighing and recording as m1；
S4, calculating a formula according to the water absorption of the recycled coarse aggregate for the concrete
Wherein omega is the water absorption of the recycled coarse aggregate for concrete for 1 hour or 24 hours; m is0The weight of the dried sample is gram; m is1The mass of the soaked sample is given in grams.
6. The method for measuring a water absorption of a recycled coarse aggregate for concrete according to claim 5, wherein: the water absorption was an arithmetic average of the measurement results obtained by repeating steps S1 to S4 3 times.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010192498.1A CN111351730A (en) | 2020-03-18 | 2020-03-18 | Device and method for measuring water absorption of recycled coarse aggregate for concrete |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010192498.1A CN111351730A (en) | 2020-03-18 | 2020-03-18 | Device and method for measuring water absorption of recycled coarse aggregate for concrete |
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Cited By (2)
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| CN112505293A (en) * | 2020-11-17 | 2021-03-16 | 贵州大学 | Intelligent measuring cup for measuring rock water absorption in real time and using method thereof |
| CN112557237A (en) * | 2020-12-21 | 2021-03-26 | 中山艾尚智同信息科技有限公司 | Quick, automatic determination device of sand mud content for building |
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| CN112557237A (en) * | 2020-12-21 | 2021-03-26 | 中山艾尚智同信息科技有限公司 | Quick, automatic determination device of sand mud content for building |
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