CN115819011A - Concrete water-retaining agent based on high-adsorbability stone powder - Google Patents
Concrete water-retaining agent based on high-adsorbability stone powder Download PDFInfo
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- CN115819011A CN115819011A CN202211235518.4A CN202211235518A CN115819011A CN 115819011 A CN115819011 A CN 115819011A CN 202211235518 A CN202211235518 A CN 202211235518A CN 115819011 A CN115819011 A CN 115819011A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a concrete water-retaining agent based on high-adsorbability stone powder, which is characterized by comprising the following components in parts by weight: the method comprises the following steps: 60-70 parts of high-adsorbability stone powder, 20-30 parts of silica fume and 10-20 parts of cellulose ether; the water demand ratio of the high-adsorbability stone powder is not less than 120 percent; the invention utilizes the water absorption retention function of the high-adsorption stone powder to modify the high-adsorption stone powder to prepare the concrete water-retaining agent which is low in price, convenient and fast to prepare and environment-friendly, can effectively reduce the production cost of concrete, and improves the added value of the high-adsorption stone powder.
Description
Technical Field
The invention belongs to the technical field of concrete admixtures, and particularly relates to a concrete water-retaining agent based on high-adsorbability stone powder.
Background
The concrete is a foundation stone of projects such as railways, bridges, highways, hydropower and the like, in order to meet the continuous improvement of building standard requirements, a large amount of additives with different performances are added into the concrete to prepare high-performance concrete, and engineering practices show that the phenomena of segregation, bleeding and the like of newly mixed concrete are more remarkable due to the high water reducing capacity and high sensitivity to materials of the additives, so that the working performance of the concrete is reduced, the problems of weak surface layer, holes, exposed ribs and the like occur after the concrete is hardened, and the project quality is seriously influenced. The strength development of the poured concrete needs a long time, sufficient cement hydration reaction is ensured to be continuously carried out in the period, but in the actual engineering, the maintenance process is extensive, the concrete is exposed in the natural environment shortly after being poured, the moisture is rapidly evaporated, and the concrete is cracked and the strength development is insufficient.
At present, the working performance of fresh concrete is improved and the water loss of hardened concrete is reduced by adding a water-retaining agent in the concrete industry. The main components of the commonly used concrete water retention agent are cellulose, starch, water-soluble polymer and the like. Patent CN201811483072.0 discloses a concrete water-retaining agent, the main component of which is hydroxypropyl methyl cellulose, and the cellulose water-retaining agent has a delayed coagulation effect on concrete, which may cause the strength reduction of the concrete. Patent CN202110861804.0 discloses a concrete water-retaining agent and a preparation method thereof, main components are hydroxypropyl methyl fiber, amylopectin and the like, starch materials are poor in solubility in cement concrete, and concrete strength can be reduced. The main technology of the concrete water-retaining agent in patent CN201811483072.0 is to modify polyacrylamide resin and fully mix the modified polyacrylamide resin with carboxyethyl cellulose ether, cellulose hydroxyalkyl ether, water-soluble latex powder and the like to prepare the water-retaining agent.
With the current situation of river sand resource shortage becoming more serious, rocks with different lithology are used for producing machine-made aggregates, stone powder is a by-product inevitably generated in the production process of the machine-made aggregates, the yield of the high-adsorbability stone powder is gradually increased, the resources are rich and easy to obtain, but the utilization technology of the high-adsorbability stone powder is still lacked at present.
Disclosure of Invention
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
The invention provides a concrete water-retaining agent based on high-adsorbability stone powder, aiming at overcoming the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: a concrete water-retaining agent based on high-adsorbability stone powder is characterized in that: the method comprises the following steps: 60-70 parts of high-adsorbability stone powder, 20-30 parts of silica fume and 10-20 parts of cellulose ether; the water demand ratio of the high-adsorbability stone powder is not less than 120 percent;
the preparation method of the concrete water-retaining agent based on high-adsorbability stone powder comprises the following steps: a. washing impurities such as soil, leaves and the like adhered to the surface of the rock fragments with the thickness of 0-10 mm with clean water, and naturally airing the rock fragments until the water content of the rock fragments is less than or equal to 1%; b. adding 10-20 kg of rock fragments into a ball mill, adding a grinding aid accounting for 0.05-0.15% of the mass of the rock fragments, grinding together for 30-60 min, screening out stone powder particles with the particle size of less than or equal to 75 microns by adopting a screening device, and continuously returning the particles with the particle size of more than 75 microns to the ball mill, wherein the grinding aid is one or more of triethanolamine, triisopropanolamine, ethylene glycol and propylene glycol; c. supplementing the rock fragments obtained in the step a into a ball mill, adding 0.05-0.15% of grinding aid according to the mass of the supplemented rock fragments, and repeating the step b to prepare high-adsorbability stone powder; d. sampling 2kg of the high-adsorbability stone powder prepared in the step c, preparing reference mortar according to 450g of reference cement, 225g of water and 1350g of reference sand, testing the fluidity F of the reference mortar, and preparing contrast mortar according to 315g of the reference cement, 175g of the high-adsorbability stone powder, water and 1350g of the reference sand, wherein when the fluidity of the contrast mortar reaches F, the water consumption is M, and when the ratio of the water consumption of the contrast mortar to the water consumption of the reference mortar is more than or equal to 120%, the high-adsorbability stone powder prepared in the step c is considered to meet the requirement; e. stirring the high-adsorbability stone powder, the silica fume and the cellulose ether in powder stirring equipment for 45-80 min, and fully mixing and dispersing to obtain a concrete water-retaining agent;
the ball mill in step b comprises: the inner barrel body is constructed into a cavity for containing steel balls and materials; the outer barrel body is sleeved on the outer side of the inner barrel body and forms a separation cavity with the side wall of the inner barrel body; the frame bodies are arranged at two ends of the inner barrel body; the lining plates are arranged on the inner wall of the inner barrel body; the inner barrel body is rotatably connected to the frame body, the adjacent lining plates are rotatably connected, and the inner barrel body drives the adjacent lining plates to rotate so as to change the state of the lining plates in the inner barrel body, so that the steel balls and the materials are impacted on the whole side wall of the lining plates.
Further, welt one end is connected with first connecting axle, and the other end is connected with the second connecting axle, and the welt links to each other with adjacent welt through first connecting axle and second connecting axle, and first connecting axle sliding connection is on interior staving.
Furthermore, a plurality of first connecting rings are arranged in the inner barrel body, and first movable grooves for the first connecting shafts to move are formed in the first connecting rings.
Further, the ball mill still includes: the transmission part is used for pushing the first connecting shaft to move up and down; the second connecting ring is arranged on the outer barrel body; the second connecting ring is provided with a guide groove for guiding the transmission piece to move.
Furthermore, be equipped with sealed piece in the first activity inslot, on first connecting axle wears to locate sealed piece, the driving medium is connected on first connecting axle.
Furthermore, the outer barrel body is provided with a water inlet pipe and a water outlet pipe which are communicated with the separate cavity.
Furthermore, a gap is reserved between the lining plate and the inner wall of the cavity, and a water storage bag communicated with the separate cavity is arranged in the gap.
Furthermore, a sealing ring is arranged in the separation cavity, and a connecting pipe is arranged on the sealing ring and penetrates through the water storage bag.
Furthermore, a sealing block is arranged in the first movable groove, the first connecting shaft comprises a first short shaft and a second short shaft, and the first short shaft and the second short shaft are inserted into the sealing block.
Furthermore, a limiting block is connected to the first short shaft in a sliding mode, a limiting groove corresponding to the limiting block is formed in the sealing block, and a pull rope piece used for pulling the limiting block to move is further arranged on the first short shaft.
The invention has the advantages that: provides a concrete water-retaining agent based on high-adsorbability stone powder, which has low price, convenient preparation and environmental protection.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it.
Further, throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic and that elements and components are not necessarily drawn to scale.
In the drawings:
FIG. 1 is a schematic diagram of a ball mill according to one embodiment of the present invention;
FIG. 2 is a sectional view of the inner tub of the ball mill in the embodiment shown in FIG. 1;
FIG. 3 is an enlarged view of the ball mill in the embodiment of FIG. 1 at the first connecting ring;
FIG. 4 is a cross-sectional view of the embodiment of FIG. 1 at the liner plate of the ball mill;
FIG. 5 is an enlarged view of the embodiment of FIG. 1 at the liner plate of the ball mill;
FIG. 6 is a cross-sectional view of the ball mill in the embodiment of FIG. 1 at the guide groove;
FIG. 7 is an enlarged view of the ball mill in the embodiment of FIG. 1 at the guide grooves;
FIG. 8 is a cross-sectional view of a ball mill according to another embodiment of the present invention;
FIG. 9 is an enlarged view of the ball mill of the embodiment of FIG. 8 at the water reservoir;
FIG. 10 is a cross-sectional view of a ball mill according to still another embodiment of the present invention;
fig. 11 is an enlarged view of the ball mill at the sealing block in the embodiment shown in fig. 10.
The reference numerals in the figures have the following meanings:
101. an inner barrel body; 1011. a feeding pipe; 1012. a discharge pipe; 1013. a first connecting ring; 1013a, a first movable slot; 1013b through cavity; 1013c, an extension section; 102. an outer barrel body; 1021. a water inlet pipe; 1022. a water outlet pipe; 103. a motor; 1031. a driving wheel; 104. a first connecting shaft; 105. a sealing block; 106. a transmission member; 1061. a guide block; 107. a transfusion tube; 108. a liner plate; 109. a second connecting shaft; 110. a second connection ring; 110a, a guide groove;
201. an inner barrel body; 202. an outer barrel body; 203. a seal ring; 2031. a connecting pipe; 204. a water storage bag;
301. a first minor axis; 3011. a limiting block; 3012. a connecting spring; 3013. a pull cord piece; 302. a second minor axis; 303. and (6) sealing the block.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is to be understood that the disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.
It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings. The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
It should be noted that the terms "first", "second", and the like in the present disclosure are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.
It is noted that references to "a", "an", and "the" modifications in this disclosure are intended to be illustrative rather than limiting, and that those skilled in the art will recognize that "one or more" may be used unless the context clearly dictates otherwise.
The names of messages or information exchanged between devices in the embodiments of the present disclosure are for illustrative purposes only, and are not intended to limit the scope of the messages or information.
The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
A concrete water-retaining agent based on high-adsorbability stone powder comprises: 60-70 parts of high-adsorbability stone powder, 20-30 parts of silica fume and 10-20 parts of cellulose ether; the water requirement ratio of the high-adsorbability stone powder is not less than 120%.
The invention also provides a method for preparing the concrete water-retaining agent, which comprises the following steps:
s1, washing impurities such as soil and leaves adhered to the surface of 0-10 mm rock fragments with clean water, and naturally airing the rock fragments until the water content of the rock fragments is not more than 1%;
s2, adding 15kg of rock fragments into a ball mill, adding 0.05% (by mass of the rock fragments) of triethanolamine, grinding for 60min together, screening stone powder particles with the particle size of not more than 75 microns by using a screening device, and continuously returning the particles with the particle size of more than 75 microns to the ball mill;
s3, supplementing the rock fragments obtained in the step S1 into a ball mill, adding 0.05% of triethanolamine according to the mass of the supplemented rock fragments, and repeating the step S2 to obtain high-adsorbability stone powder;
s4, measuring that the water-demand ratio of the high-adsorbability stone powder is 135%, wherein the high-adsorbability stone powder prepared in the step S3 meets the requirement;
and S5, stirring 60 parts by weight of high-adsorbability stone powder, 30 parts by weight of silica fume and 10 parts by weight of cellulose ether in powder stirring equipment for 60min, and fully mixing and dispersing to obtain the concrete water-retaining agent.
The invention utilizes the characteristics of high water absorbability and good water retention of the high-adsorbability stone powder to grind and modify the stone powder, increase the surface area of the stone powder, improve the water absorption, and improve the water retention effect of the high-adsorbability stone powder by compounding a small amount of silica fume and cellulose ether, thereby preparing the concrete water retention agent.
The stone powder belongs to inorganic silicate minerals, has good compatibility with cement, does not deteriorate the strength and durability of concrete when being added into the concrete, reduces the segregation and bleeding risk of fresh concrete by improving the water retention of the concrete, reduces the water loss in hardened concrete, ensures the strength development of the concrete, reduces the drying shrinkage rate and improves the volume stability of the concrete;
according to the invention, the silica fume and the cellulose ether are compounded in the high-adsorbability stone powder, so that the consistency of the cement paste is improved, the high-adsorbability stone powder after water absorption is wrapped by the high-consistency cement paste, and the water retention capacity of the high-adsorbability stone powder after water absorption is improved;
the invention is mainly made of stone powder materials with easily available resources and low price, and has simple and convenient preparation process and remarkable economic benefit.
As shown in fig. 1 to 7, the ball mill in step S2 includes a frame body, an inner barrel 101, an outer barrel 102, a plurality of lining plates 108, and a motor 103.
The inner barrel body 101 is configured to be a cavity for containing steel balls and materials; the outer barrel body 102 is sleeved outside the inner barrel body 101 and forms a separation cavity with the side wall of the inner barrel body 101; the frame bodies are arranged at two ends of the inner barrel body 101; the lining plate 108 is arranged on the inner wall of the inner barrel body 101; the inner barrel body 101 is rotatably connected to the frame body, the adjacent lining plates 108 are rotatably connected, when the inner barrel body 101 rotates, the adjacent lining plates 108 are driven to rotate so as to change the state of the lining plates 108 in the inner barrel body 101, so that steel balls and materials impact on the whole side walls of the lining plates 108, wherein the state of the lining plates 108 includes the positions and angles of the lining plates 108; a transmission wheel 1031 is arranged on an output shaft of the motor 103, and a transmission disc matched with the transmission wheel 1031 is arranged on the inner barrel body 101; a feed pipe 1011 is arranged at one end of the inner barrel body 101, and a discharge pipe 1012 is arranged at the other end.
Materials and steel balls are put into the inner barrel body 101 from the feeding pipe 1011, the motor 103 drives the transmission wheel 1031 to rotate, the transmission wheel 1031 is matched with the transmission disc to drive the transmission disc to rotate, the inner barrel body 101 drives the materials and the steel balls to rotate together, and the steel balls and the materials are overturned and collided in the inner barrel body 101 to grind the materials; when the inner barrel body 101 rotates, the relative position and the angle of the adjacent lining plates 108 are changed, so that the positions of materials and steel balls impacting the lining plates 108 are changed, the steel balls can be changed to bounce angles and fall positions, the steel balls impact the materials at different angles and positions, the contact effect of the steel balls and the materials is improved, and the grinding effect of the materials is further improved.
The rotating inner barrel is arranged in the static outer barrel, so that the outer side of the equipment is in a static state, and the damage to operators during the operation of the equipment is avoided; the arrangement of the separate cavities ensures that the inner ventilation can have sufficient space to rotate, and reduces the friction on the rotation of the inner barrel; by changing the state of the lining plate 108 in the inner barrel body 101, the whole side wall of the lining plate 108 can be in contact with the steel balls and the materials, and the highest point position where the steel balls and the materials can move is changed, so that the height of the steel balls and the materials which rise along with the rotation of the inner barrel body 101 at each time is changed, the impact force and the contact angle of the steel balls and the materials are changed, and the grinding effect on the materials is effectively improved.
One end of each lining plate 108 is connected with a first connecting shaft 104, the other end of each lining plate 108 is connected with a second connecting shaft 109, the lining plates 108 are connected with the adjacent lining plates 108 through the first connecting shafts 104 and the second connecting shafts 109, the first connecting shafts 104 are slidably connected to the inner barrel body 101, two ends of each lining plate 108 are connected with one first connecting shaft 104 and one second connecting shaft 109, a plurality of first connecting rings 1013 are arranged in the inner barrel body 101, a first movable groove 1013a for the first connecting shaft 104 to move is arranged on each first connecting ring 1013, and the first connecting shafts 104 are arranged in the first movable grooves 1013a in a penetrating manner; the interior of the first connecting ring 1013 is divided into a plurality of chambers, and a liner 108 is disposed in each chamber; the second connecting shaft 109 serves only to connect the adjacent lining plates 108, and both ends thereof are not connected to the first connecting rings 1013.
The first connecting shaft 104 moves up and down along with the rotation of the inner barrel body 101, the first connecting shaft 104 drives one end of the lining plate 108 to move when moving, the lining plate 108 rotates around the first connecting shaft 104 and the second connecting shaft 109, and the state of the lining plate 108 in the inner barrel body 101 is changed; because the second connecting shaft 109 has no connecting point, the lining plate 108 can drive the second connecting shaft 109 to move randomly when moving along with the first connecting shaft 104, thereby increasing the uncertainty of the deformation of the lining plate 108 and further improving the contact effect of the steel balls and the materials; the first connecting ring 1013 provides supporting force for the lining plate 108, the lining plate 108 is designed into a multi-section form, the structural strength of the lining plate 108 is increased, and the use reliability of the equipment is ensured.
A through cavity 1013b communicated with the separation cavity is arranged at the top of the first movable groove 1013, a second connecting ring 110 is arranged on the inner wall of the outer barrel body 102, a transmission member 106 is arranged in the through cavity 1013b in a penetrating manner, the transmission member 106 is of a rod structure, the bottom of the transmission member 106 is connected to the first connecting shaft 104, a movable cavity is arranged on the second connecting ring 110, one end of the transmission member 106 is arranged in the movable cavity in a penetrating manner, a guide block 1061 is arranged at one end of the transmission member 106 arranged in the movable cavity in a penetrating manner, a guide groove 110a corresponding to the guide block 1061 is arranged on the inner wall of the movable cavity, and the guide groove 110a is of a corrugated structure.
When the inner barrel body 101 rotates, the inner barrel body 101 rotates relative to the outer barrel body 102, the inner barrel body 101 drives the transmission piece 106 to rotate together, the guide block 1061 moves in the guide groove 110a when rotating along with the transmission piece 106, the transmission piece 106 intermittently moves up and down when the inner barrel body 101 rotates under the matching of the guide block 1061 and the guide groove 110a, the transmission piece 106 drives the first connecting shaft 104 to move together when moving, the first connecting shaft 104 drives one end of the lining plate 108 to move, and the state of the lining plate 108 in the inner barrel body 101 is changed; by means of the cooperation of the guide block 1061 and the guide groove 110a, the inner barrel 101 transmits power to the lining plate 108 during rotation, so that the lining plate 108 changes state spontaneously, different reaction forces are provided for steel balls and materials, and the contact effect of the steel balls and the materials is ensured.
A sealing block 105 is arranged in the first movable groove, the first connecting shaft 104 penetrates through the sealing block 105, an extension part 1013c corresponding to the through cavity is arranged in the first movable groove, and a groove corresponding to the extension part 1013c is arranged on the sealing block 105; the sealing block 105 has a sealing effect on the first movable groove, and prevents the steel balls and the material from entering the first movable groove to influence the movement of the first connecting shaft 104 in the first movable groove.
The outer barrel body 102 is provided with a water inlet pipe 1021 and a water outlet pipe 1022 which are communicated with the separate cavity, the second connecting ring 110 is provided with a plurality of water pipes, and the whole separate cavity is communicated through the water pipes; the water inlet pipe is positioned at the bottom of the outer barrel body 102, and the water outlet pipe is positioned at the top of the outer barrel body 102; clear water is input into the separate cavity through the water inlet pipe, so that the separate cavity is filled with clear water, and redundant clear water in the separate cavity is discharged from the water outlet pipe; the whole equipment is cooled by filling clear water in the separate cavity, and meanwhile, the shock generated on the inner barrel body 101 is absorbed by the clear water, so that the equipment is in a stable working state; meanwhile, the clean water in the separation cavity absorbs part of noise generated in the inner barrel body 101, so that a noise reduction effect is provided for the equipment, and the influence of the equipment on the external environment is reduced.
The outer tub 102 is constructed of a plurality of rings to facilitate maintenance of the equipment.
A gap is reserved between the lining plate and the inner wall of the cavity, a reserved space is provided for movement of the lining plate, the middle part of the lining plate is in a suspended state at the moment, the middle part of the lining plate is not supported, and the service life of the lining plate is influenced, so that as a further preferable scheme, as shown in fig. 8 to 9, a water storage bag 204 communicated with the separation cavity is arranged in the gap, a sealing ring 203 is arranged in the separation cavity, a connecting pipe 2031 is arranged on the sealing ring 203, and the connecting pipe 2031 is arranged in the water storage bag 204 in a penetrating manner; the water flow in the separation cavity enters the water outlet bag through the connecting pipe 2031, and the side wall of the water storage bag 204 abuts against the side wall of the lining plate to provide supporting force for the lining plate, so that the structural strength of the lining plate is improved, and the noise generated on the lining plate is reduced; when the first connecting shaft drives the lining plate to move, the lining plate moves to extrude the water storage bag, part of water flow is extruded from the water storage bag 204 after the water storage bag 204 is extruded, when the first connecting shaft moves downwards, the water storage bag 204 recovers deformation under the action of self elasticity, and part of water flow in the separation cavity flows into the water storage bag 204 again to supplement the water flow in the water storage bag 204, so that the water flow in the water storage bag 204 is in a flowing state, an auxiliary cooling effect is provided for the lining plate, and a good protection effect is provided for the lining plate; through the setting of sealing ring 203, guarantee to separate the rivers in the intracavity and can only enter into water storage bag 204 in, avoid rivers directly to enter into and reveal in the cavity behind the clearance, guarantee the normal clear of grinding operation.
As shown in fig. 10 to 11, as a further preferred aspect, the first connecting shaft includes a first stub shaft 301 and a second stub shaft 302, the first connecting shaft is formed by a plurality of first stub shafts 301 and second stub shafts 302 cooperatively, and the first stub shafts 301 and the second stub shafts 302 are each inserted on the seal block 303; specifically, a second movable groove is formed in one end of the first short shaft 301, a connecting spring 3012 is arranged in the second movable groove, a limiting block 3011 is arranged at one end of the connecting spring 3012, a limiting groove matched with the limiting block 3011 is formed in the side wall of the sealing block 303, a connecting cavity communicated with the second movable groove is formed in the first short shaft 301, a pull rope piece 3013 is arranged in the connecting cavity, one end of the pull rope piece 3013 is fixedly connected to the limiting block 3011, and one end of the pull rope piece 3013 is exposed out of the connecting cavity; the transmission member is connected to a sealing block 303, and the second stub shaft 302 and the first stub shaft 301 are identical in structure.
When the lining plate is disassembled, an operator enters the inner barrel body, pulls the pull rope piece 3013 on the first connecting shaft for connecting the lining plate to be replaced, pulls the limiting block 3011 into the second movable groove by the pull rope piece 3013, and the limiting block 3011 is separated from the limiting groove, so that the lining plate to be replaced is separated from the first connecting ring, and the lining plate to be replaced naturally falls out of the first connecting ring, so that the lining plate can be disassembled from the inner barrel body; by dividing the first connecting shaft into a plurality of first short shafts 301 and second short shafts 302, one lining plate can be independently replaced, the difficulty in replacing the lining plate is reduced, and therefore the equipment maintenance cost is reduced.
Be equipped with the spline on the stopper 3011 lateral wall, be equipped with on the second activity inslot wall with spline matched with spline groove, the cooperation that utilizes spline groove and spline makes stopper 3011 and first minor axis 301 form and splines the cooperation, so that connect first minor axis 301 on sealed piece 303 under the cooperation of stopper 3011 and spacing groove, the first connecting shaft of drive that can be stable when making the driving medium drive sealed piece 303 remove removes, change the state of welt in interior barrel, promote the grinding effect to the material.
As another embodiment of the invention, a concrete water-retaining agent based on high-adsorbability stone powder is prepared according to the following steps:
s1, washing impurities such as soil and leaves adhered to the surface of the rock debris with the thickness of 0-10 mm with clean water, and naturally airing the rock debris until the water content is not more than 1%;
s2, adding 15kg of rock fragments into a ball mill, adding 0.1% (by mass of the rock fragments) of triisopropanolamine, grinding for 45min together, screening out stone powder particles with the particle size of not more than 75 microns by using a screening device, and continuously returning the particles with the particle size of more than 75 microns to the ball mill;
s3, supplementing the rock fragments obtained in the step S1 into a ball mill, adding 0.1% of triisopropanolamine according to the mass of the supplemented rock fragments, and repeating the step S2 to obtain high-adsorbability stone powder;
s4, measuring the water-water quantity ratio of the high-adsorbability stone powder to be 138%, wherein the high-adsorbability stone powder prepared in the step S3 meets the requirement;
s5, stirring 65 parts by weight of high-adsorbability stone powder, 25 parts by weight of silica fume and 10 parts by weight of cellulose ether in powder stirring equipment for 60min, and fully mixing and dispersing to obtain the concrete water-retaining agent.
As another embodiment of the invention, the concrete water-retaining agent based on high-adsorbability stone powder is prepared according to the following steps:
s1, washing impurities such as soil and leaves adhered to the surface of 0-10 mm rock fragments with clean water, and naturally airing the rock fragments until the water content of the rock fragments is not more than 1%;
s2, adding 15kg of rock fragments into a ball mill, adding 0.15% (by mass of the rock fragments) of ethylene glycol, grinding for 60min together, screening stone powder particles with the particle size of not more than 75 microns by using a screening device, and continuously returning the particles with the particle size of more than 75 microns to the ball mill;
s3, supplementing the rock fragments obtained in the step S1 into a ball mill, adding 0.15% of ethylene glycol according to the mass of the supplemented rock fragments, and repeating the step S2 to obtain high-adsorbability stone powder;
s4, measuring the water-water ratio of the high-adsorbability stone powder to be 140%, wherein the high-adsorbability stone powder prepared in the step S3 meets the requirement;
and S5, stirring 70 parts by weight of high-adsorbability stone powder, 20 parts by weight of silica fume and 10 parts by weight of cellulose ether in powder stirring equipment for 60min, and fully mixing and dispersing to obtain the concrete water-retaining agent.
The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention in the embodiments of the present disclosure is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is made without departing from the inventive concept as defined above. For example, the above features and (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure are mutually replaced to form the technical solution.
Claims (10)
1. A concrete water-retaining agent based on high-adsorbability stone powder is characterized in that: the method comprises the following steps: 60-70 parts of high-adsorbability stone powder, 20-30 parts of silica fume and 10-20 parts of cellulose ether; the water demand ratio of the high-adsorbability stone powder is not less than 120 percent;
the preparation method of the concrete water-retaining agent based on high-adsorbability stone powder comprises the following steps:
a. washing impurities such as soil and leaves adhered to the surface of the rock debris with the thickness of 0-10 mm with clean water, and naturally airing the rock debris until the water content of the rock debris is less than or equal to 1%;
b. adding 10-20 kg of rock fragments into a ball mill, adding a grinding aid accounting for 0.05-0.15% of the mass of the rock fragments, grinding together for 30-60 min, screening out stone powder particles with the particle size of less than or equal to 75 microns by using a screening device, and continuously returning the particles with the particle size of more than 75 microns to the ball mill, wherein the grinding aid is one or more of triethanolamine, triisopropanolamine, ethylene glycol and propylene glycol;
c. supplementing the rock fragments obtained in the step a into a ball mill, adding 0.05-0.15% of grinding aid according to the mass of the supplemented rock fragments, and repeating the step b to prepare high-adsorbability stone powder;
d. sampling 2kg of the high-adsorbability stone powder prepared in the step c, preparing reference mortar according to 450g of reference cement, 225g of water and 1350g of reference sand, testing the fluidity F of the reference mortar, and preparing contrast mortar according to 315g of the reference cement, 175g of the high-adsorbability stone powder, water and 1350g of the reference sand, wherein when the fluidity of the contrast mortar reaches F, the water consumption is M, and when the ratio of the water consumption of the contrast mortar to the water consumption of the reference mortar is more than or equal to 120%, the high-adsorbability stone powder prepared in the step c is considered to meet the requirement;
e. stirring the high-adsorbability stone powder, the silica fume and the cellulose ether in powder stirring equipment for 45-80 min, and fully mixing and dispersing to obtain a concrete water-retaining agent;
the ball mill in the step b comprises:
the inner barrel body is constructed into a cavity for containing steel balls and materials;
the outer barrel body is sleeved on the outer side of the inner barrel body and forms a separation cavity with the side wall of the inner barrel body;
the frame bodies are arranged at two ends of the inner barrel body;
the lining plates are arranged on the inner wall of the inner barrel body;
the inner barrel body is rotatably connected to the frame body, the adjacent lining plates are rotatably connected, and the inner barrel body drives the adjacent lining plates to rotate when rotating so as to change the state of the lining plates in the inner barrel body, so that the steel balls and the materials impact on the whole side wall of the lining plates.
2. The high adsorptivity stone powder based concrete water retaining agent as claimed in claim 1, wherein: the utility model discloses a lining board, including the interior staving, welt one end is connected with first connecting axle, and the other end is connected with the second connecting axle, the welt passes through first connecting axle with the second connecting axle links to each other with adjacent welt, first connecting axle sliding connection in on the interior staving.
3. The concrete water-retaining agent based on high adsorptivity stone powder as claimed in claim 1, wherein: a plurality of first connecting rings are arranged in the inner barrel body, and first movable grooves for the first connecting shafts to move are formed in the first connecting rings.
4. The high adsorptivity stone powder based concrete water retaining agent as claimed in claim 3, wherein: the ball mill further comprises:
the transmission part is used for pushing the first connecting shaft to move up and down;
the second connecting ring is arranged on the outer barrel body;
and the second connecting ring is provided with a guide groove for guiding the transmission piece to move.
5. The high adsorptivity stone powder based concrete water retaining agent as claimed in claim 4, wherein: the first movable groove is internally provided with a sealing block, the first connecting shaft penetrates through the sealing block, and the transmission part is connected to the first connecting shaft.
6. The high adsorptivity stone powder based concrete water retaining agent as claimed in claim 1, wherein: and the outer barrel body is provided with a water inlet pipe and a water outlet pipe which are communicated with the separate cavity.
7. The high adsorptivity stone powder based concrete water retaining agent as claimed in claim 6, wherein: a gap is reserved between the lining plate and the inner wall of the cavity, and a water storage bag communicated with the separate cavity is arranged in the gap.
8. The concrete water-retaining agent based on high adsorptivity stone powder as claimed in claim 7, wherein: a sealing ring is arranged in the separation cavity, a connecting pipe is arranged on the sealing ring, and the connecting pipe penetrates through the water storage bag.
9. The concrete water-retaining agent based on high adsorptivity stone powder as claimed in claim 4, wherein: the first movable groove is internally provided with a sealing block, the first connecting shaft comprises a first short shaft and a second short shaft, and the first short shaft and the second short shaft are inserted in the sealing block.
10. The high adsorptivity stone powder based concrete water retaining agent as claimed in claim 9, wherein: the first short shaft is connected with a limiting block in a sliding mode, a limiting groove corresponding to the limiting block is formed in the sealing block, and a pull rope piece used for pulling the limiting block to move is further arranged on the first short shaft.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211235518.4A CN115819011B (en) | 2022-10-10 | 2022-10-10 | Concrete water-retaining agent based on high-adsorptivity stone powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211235518.4A CN115819011B (en) | 2022-10-10 | 2022-10-10 | Concrete water-retaining agent based on high-adsorptivity stone powder |
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| CN115819011B CN115819011B (en) | 2023-09-29 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4315260B1 (en) * | 2008-01-11 | 2009-08-19 | 二郎 梶目 | Method for repairing concrete placing surface and premix mortar containing water retaining material |
| CN106186767A (en) * | 2016-07-15 | 2016-12-07 | 华南理工大学 | A kind of inorganic particle water-retaining agent and preparation method and application |
| CN109665742A (en) * | 2018-12-10 | 2019-04-23 | 福建科之杰新材料有限公司 | A kind of viscosity reduction type concrete admixture and preparation method thereof based on marble mountain flour |
| CN109665743A (en) * | 2018-12-10 | 2019-04-23 | 福建科之杰新材料有限公司 | A kind of reduction bleeding type concrete admixture and preparation method thereof based on marble mountain flour |
-
2022
- 2022-10-10 CN CN202211235518.4A patent/CN115819011B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4315260B1 (en) * | 2008-01-11 | 2009-08-19 | 二郎 梶目 | Method for repairing concrete placing surface and premix mortar containing water retaining material |
| CN106186767A (en) * | 2016-07-15 | 2016-12-07 | 华南理工大学 | A kind of inorganic particle water-retaining agent and preparation method and application |
| CN109665742A (en) * | 2018-12-10 | 2019-04-23 | 福建科之杰新材料有限公司 | A kind of viscosity reduction type concrete admixture and preparation method thereof based on marble mountain flour |
| CN109665743A (en) * | 2018-12-10 | 2019-04-23 | 福建科之杰新材料有限公司 | A kind of reduction bleeding type concrete admixture and preparation method thereof based on marble mountain flour |
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| CN115819011B (en) | 2023-09-29 |
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