CN111362632A - Construction method for large-dosage steel slag micro powder cement composite concrete pavement - Google Patents
Construction method for large-dosage steel slag micro powder cement composite concrete pavement Download PDFInfo
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- CN111362632A CN111362632A CN202010458894.4A CN202010458894A CN111362632A CN 111362632 A CN111362632 A CN 111362632A CN 202010458894 A CN202010458894 A CN 202010458894A CN 111362632 A CN111362632 A CN 111362632A
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- steel slag
- micro powder
- water
- slag micro
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
- E01C19/104—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
- E01C7/142—Mixtures or their components, e.g. aggregate
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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 construction method of a large-doped steel slag micro powder cement composite concrete pavement, which comprises the following steps: s1, installing a template: placing the template on the base layer according to the paying-off position, and driving steel rods into the base layer from two sides to fix the template; s2, mixing and transporting the steel slag micro powder cement concrete with large mixing amount: mixing cement, steel slag micro powder, broken stone, machine-made sand and water by using a concrete mixer, wherein the cement accounts for 200 parts by weight, the steel slag micro powder accounts for 200 parts by weight, the machine-made sand accounts for 1100 parts by weight, the broken stone accounts for 800 parts by weight and the water accounts for 160 parts by weight, and after the mixing is finished, transporting the mixture to a construction site; s3, paving and compacting; s4, surface trimming; s5, constructing a joint; s6, preserving health and carving patterns. The invention obtains scientific raw material proportion through strict experiments, so that the addition of steel slag micro powder with large mixing amount can be realized in the pavement paving process.
Description
Technical Field
The invention relates to a pavement construction method, in particular to a construction method of a large-doped steel slag micro powder cement composite concrete pavement.
Background
As is well known, the steel slag is a byproduct in the steel making process, 125-140 kg of steel slag is generated per 1 ton of steel, and the annual steel slag yield in China is about 1 hundred million tons. The steel slag has various types and large fluctuation of components and performance, the comprehensive utilization rate of the processed steel slag is about 25 percent, and a large amount of steel slag is abandoned to form slag hills, which seriously threatens the ecological safety of the environment and increasingly becomes the bottleneck of the survival and development of the steel industry.
According to statistics of Chinese environmental bulletin, 4.8 hundred million tons of metallurgical slag are generated in China in 2018, although the comprehensive utilization rate of the metallurgical slag averagely reaches 65%, the comprehensive utilization rate of the steel slag is only about 25%, so far, the metallurgical slag is generated by the steel industry in China totally about 45.8 million tons, wherein the steel slag accounts for 1/3, the discharge amount of waste steel slag in solid industry per year is more than 5000 ten million tons, the accumulated stockpiling amount of steel slag in China reaches more than 18 million tons, the occupied area is more than 20 ten million mu, the environment is polluted, and resources are wasted. The steel slag micro-powder processing technology and equipment research and development are listed in the key field of comprehensive utilization, popularization and development of metallurgical slag resources during the 'twelve five' period in China, and are one of key contents of the metallurgical slag value-added product processing technology. According to the data published by the medium steel cooperation, the steel slag and the blast furnace slag are the metallurgical slag with the largest discharge amount in the steel industry, the yield is about 14 percent and 30 percent of the yield of crude steel respectively, but the total utilization rate of the steel slag in China is low for many years, and the technical treatment cannot meet the requirement of later deep processing and utilization. At present, most of steel slag is not effectively utilized except for extracting part of metallic iron in the steel slag, which has a great difference from 75% of indexes required by ' twelve five ' planning of comprehensive utilization of bulk industrial solid wastes ' of the Ministry of industry and trust, and is far away from the level of reaching the national comprehensive utilization rate close to 100%.
In recent decades, numerous researchers have developed the application research of steel slag pretreatment and steel slag fine in cement concrete, and the application of steel slag powder in cement concrete has been advanced sufficiently, but in general, the engineering application of steel slag powder in cement concrete is not mature, and the utilization rate of steel slag powder in cement concrete is low. The comprehensive utilization of metallurgical slag, particularly converter steel slag and electric furnace steel slag, is the key point in the national development and transformation committee, the ministry of industry and trust and the Chinese metal society, and the thirteen-five new engineering projects related to the development and utilization of the bulk solid wastes are supported by funds, and various demonstration enterprises, industrial park construction and the like are selected to incline in the industry of wanting the development and utilization of the steel slag.
The steel slag contains a large amount of available components such as slag steel, calcium oxide, iron, magnesium oxide and the like, so that the steel slag has a very long-term significance in selecting a proper treatment process and applying the treatment process to road paving to develop the recycling value of steel enterprises for creating economic and environmental benefits. In view of the above, the inventor of the present application has made intensive studies to obtain a construction method for a large-doped steel slag micro powder cement composite concrete pavement.
Disclosure of Invention
The invention aims to provide a construction method of a steel slag micro powder cement composite concrete pavement with a large doping amount, which can realize the addition of steel slag micro powder with a large doping amount in the road construction process.
The technical purpose of the invention is realized by the following technical scheme:
a construction method of a large-doped steel slag micro powder cement composite concrete pavement comprises the following steps:
s1, installing a template: placing the template on a base layer according to a paying-off position, and driving steel rods into the base layer from two sides to fix the template, wherein the distance between the steel rods is set to be 1.0-1.5m at the inner side and 0.5-1.0m at the outer side;
s2, mixing and transporting the steel slag micro powder cement concrete with large mixing amount: mixing cement, steel slag micro powder, broken stone, machine-made sand and water by using a concrete mixer, wherein the cement accounts for 200 parts by weight, the steel slag micro powder accounts for 200 parts by weight, the machine-made sand accounts for 1100 parts by weight, the broken stone accounts for 800 parts by weight and the water accounts for 160 parts by weight, and after the mixing is finished, transporting the mixture to a construction site;
s3, paving and compacting: uniformly spreading the materials and then vibrating the materials by using an inserted vibrator;
s4, surface trimming;
s5, joint construction: pouring a joint filling material in the expansion joint, and processing a contraction joint;
s6, preserving health and engraving: and (5) covering a health-preserving film, and engraving before initial setting.
In a further improvement, in the step S2, the steel slag micro powder is obtained by ball milling, and the specific surface area of the steel slag micro powder is set to 400-2And/kg, adding an active exciting agent in the ball milling process.
The concrete mixer comprises a supporting seat, a stirring motor, a stirring shaft, a stirring barrel, a stirring blade and a water adding device, wherein the supporting seat is arranged at the bottom of the stirring barrel and is used for supporting the stirring barrel, a discharge hole is formed in the bottom of the stirring barrel, the stirring motor is fixed at the bottom of the stirring barrel, the lower end of the stirring shaft is connected with the stirring motor and driven by the stirring motor to rotate, the upper end of the stirring shaft is inserted into the stirring barrel from bottom to top, a plurality of stirring blades are arranged on the stirring shaft in a circumferential distribution manner, the water adding device comprises a liquid outlet pipe, a control rod, a propping spring, a mounting frame, a connecting piece, a contact plate and a water tank, the water tank is fixed at the top end of the stirring shaft, the liquid outlet pipe is made of hard materials and is longitudinally arranged at the lower part of the water tank and connected with the inside of, its lateral part is equipped with the jack, the control lever transversely sets up and its both ends are control end and sealed end respectively, the control end of control lever is connected the upper end of connecting piece, the lower extreme of connecting piece is connected the contact plate, be equipped with on the control lever and support the platform, the contact plate stretches into in the agitator, the mounting bracket install in the lower surface of water tank is equipped with the installation through-hole on it, the control lever passes the installation through-hole, support the spring housing and locate on the control lever, its one end support top in support bench, the other end support top on the mounting bracket under the effect of supporting the spring, the sealed end of control lever inserts seal in the jack the drain pipe.
In a further improvement, the water adding device further comprises a sealing block, the sealing block is arranged at the sealing end of the control rod, and the sealing block extends into the liquid outlet pipe.
In a further improvement, the water adding device further comprises a propping frame and a propping bolt, the propping frame is fixed at the lower part of the water tank, a propping screw hole is arranged on the propping frame, the propping bolt is matched with the propping screw hole, the propping bolt props against the control end of the control rod, and the length direction of the propping bolt is parallel to the length direction of the control rod.
In a further improvement, the mounting frame and the abutting frame are both in a plate shape, and the connecting piece is in a rod shape.
In a further improvement, the water adding device further comprises a water distributor, the water distributor comprises a connector and a plurality of water distribution pipes, the connector is connected with the lower ends of the liquid outlet pipes, the upper ends of the plurality of water distribution pipes are connected with the connector and are uniformly distributed by taking the connector as a central circumference, the water distribution pipes are obliquely arranged downwards, the connector is arranged in a hollow mode, and the liquid outlet pipes and the water distribution pipes are connected with the inside of the connector.
In a further improvement, the water distributor further comprises nozzles which are arranged in one-to-one correspondence with the plurality of water distribution pipes, the lower end of each water distribution pipe in the plurality of water distribution pipes is connected with one nozzle, and the water spraying direction of each nozzle faces to the center of the stirring barrel.
Compared with the prior art, the invention provides the construction method of the large-doping-amount steel slag micro-powder cement composite concrete pavement, which obtains scientific raw material proportion through strict experiments, so that the large-doping-amount steel slag micro-powder can be added in the pavement paving process, and the utilization rate of steel slag is effectively improved; further, the invention provides a concrete mixer, wherein a contact plate is contacted with concrete in a mixing barrel, resistance generated by the concrete is transmitted to a control rod, the control rod mainly seals a liquid outlet pipe under the action of an abutting spring, when the resistance generated by the concrete is larger than the elastic force provided by the abutting spring, the control rod is pulled to exit from an insertion hole, so that the liquid outlet pipe is opened, water in a water tank enters the mixing barrel through the liquid outlet pipe, and water adding work is realized, in the process, the on-off state of the liquid outlet pipe is mainly controlled by the resistance generated by the concrete, when the water adding amount of the concrete is insufficient, the resistance is larger, so that the liquid outlet pipe is opened for water adding work, when the water adding amount of the concrete is enough, the resistance generated by the concrete is reduced, so that the liquid outlet pipe is closed, the water adding work is stopped, and the automatic water adding operation is realized, and only the contact plate and a connecting piece of a water adding device are contacted with the, other parts do not contact with concrete, can avoid the concrete to the influence of adding water installation linkage for it has better job stabilization nature and longer life to add water installation.
Drawings
FIG. 1 is a process flow chart of the construction method of a large-content steel slag micro powder cement composite concrete pavement.
FIG. 2 is a schematic structural diagram of a concrete mixer used in the construction method of a large-content steel slag micro powder cement composite concrete pavement.
FIG. 3 is a schematic structural view of a water feeder without a water distributor of a concrete mixer used in a construction method of a road surface compounded with steel slag and micro powder cement with a large amount of admixture.
FIG. 4 is a schematic structural diagram of a water distributor of a water adding device of a concrete mixer applied in a construction method of a large-doping-amount steel slag micro powder cement composite concrete pavement.
In the drawings
A support seat-11; a stirring shaft-13; a stirring barrel-14; stirring blades-15; a liquid outlet pipe-21; a jack-211; a control rod-22; a control terminal-221; a sealed end-222; an abutment table-223; a resisting spring-23; a mounting bracket-24; connector-25; a contact plate-26; a water tank-27; a support frame-28; a resisting bolt-29; a connector-31; a water distribution pipe-32; and (4) a spray head-33.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
The first embodiment is as follows:
as shown in figure 1, the construction method of the steel slag micro powder cement composite concrete pavement with large doping amount comprises the following steps:
s1, installing a template: placing the template on a base layer according to a paying-off position, driving steel rods into the base layer from two sides to fix the template, wherein the distance between the steel rods is set to be 1.0m at the inner side and 0.5m at the outer side;
s2, mixing and transporting the steel slag micro powder cement concrete with large mixing amount: mixing cement, steel slag micro powder, broken stone, machine-made sand and water by using a concrete mixer, wherein 180 parts by weight of cement, 180 parts by weight of steel slag micro powder, 1100 parts by weight of machine-made sand, 700 parts by weight of broken stone and 140 parts by weight of water are conveyed to a construction site after the mixing is finished, the steel slag micro powder is obtained by ball milling, and the specific surface area of the steel slag micro powder is set to be 400 m2Per kg, adding an active exciting agent in the ball milling process;
s3, paving and compacting: uniformly spreading the materials and then vibrating the materials by using an inserted vibrator;
s4, surface trimming;
s5, joint construction: pouring a joint filling material in the expansion joint, and processing a contraction joint;
s6, preserving health and engraving: and (5) covering a health-preserving film, and engraving before initial setting.
Example two:
as shown in figure 1, the construction method of the steel slag micro powder cement composite concrete pavement with large doping amount comprises the following steps:
s1, installing a template: placing the template on a base layer according to a paying-off position, driving steel rods into the base layer from two sides to fix the template, wherein the distance between the steel rods is set to be 1.5m at the inner side and 1.0m at the outer side;
s2, mixing and transporting the steel slag micro powder cement concrete with large mixing amount: mixing cement, steel slag micro powder, broken stone, machine-made sand and water by using a concrete mixer, wherein 200 parts by weight of the cement, 200 parts by weight of the steel slag micro powder, 1150 parts by weight of the machine-made sand, 800 parts by weight of the broken stone and 160 parts by weight of the water are conveyed to a construction site after the mixing is finished, the steel slag micro powder is obtained by ball milling, and the specific surface area of the steel slag micro powder is set to be 500m2Per kg, adding an active exciting agent in the ball milling process;
s3, paving and compacting: uniformly spreading the materials and then vibrating the materials by using an inserted vibrator;
s4, surface trimming;
s5, joint construction: pouring a joint filling material in the expansion joint, and processing a contraction joint;
s6, preserving health and engraving: and (5) covering a health-preserving film, and engraving before initial setting.
Example three:
as shown in figure 1, the construction method of the steel slag micro powder cement composite concrete pavement with large doping amount comprises the following steps:
s1, installing a template: placing the template on a base layer according to a paying-off position, driving steel rods into the base layer from two sides to fix the template, wherein the distance between the steel rods is set to be 1.2m at the inner side and 0.8m at the outer side;
s2, mixing and transporting the steel slag micro powder cement concrete with large mixing amount: mixing cement, steel slag micro powder, broken stone, machine-made sand and water by using a concrete mixer, wherein 1900 parts by weight of cement, 190 parts by weight of steel slag micro powder, 1121 parts by weight of machine-made sand, 747 parts by weight of broken stone and 152 parts by weight of water are conveyed to a construction site after the mixing is finished, the steel slag micro powder is obtained by ball milling, and the specific surface area of the steel slag micro powder is set to be 450m2Kg in a ball millIn the process of (2), adding an activity excitant;
s3, paving and compacting: uniformly spreading the materials and then vibrating the materials by using an inserted vibrator;
s4, surface trimming;
s5, joint construction: pouring a joint filling material in the expansion joint, and processing a contraction joint;
s6, preserving health and engraving: and (5) covering a health-preserving film, and engraving before initial setting.
According to the construction method for the large-doping-amount steel slag micro powder cement composite concrete pavement, scientific raw material proportion is obtained through strict experiments, so that large-doping-amount steel slag micro powder can be added in the pavement paving process, and the utilization rate of steel slag is effectively improved.
Experimental research shows that the composite concrete of the steel slag micro powder mixed with the activator and the cement, which is not ground by the ball mill in the earlier stage, has the problems of long coagulation time and difficult demoulding, so in the above embodiments, the steel slag is ball-milled, and the activator is added, thereby effectively shortening the coagulation time and reducing the demoulding difficulty.
In the construction process of the steel slag micro powder cement composite concrete pavement, the cement composite concrete mixed with the steel slag micro powder has higher workability and the slump is increased, so the water consumption is strictly controlled in the mixing process, and the construction process is specially set as follows.
As shown in fig. 2 to 4, in the above embodiment, the concrete mixer includes a supporting base 11, a stirring motor, a stirring shaft 13, a stirring barrel 14, a stirring blade 15, and a water adding device, the supporting base 11 is disposed at the bottom of the stirring barrel 14 for supporting the stirring barrel 14, a discharge port is disposed at the bottom of the stirring barrel 14, the stirring motor is fixed at the bottom of the stirring barrel 14, the lower end of the stirring shaft 13 is connected to the stirring motor and is driven to rotate by the stirring motor, the upper end of the stirring shaft 13 is inserted into the stirring barrel 14 from bottom to top, the stirring blade 15 is provided with a plurality of stirring blades 15, the plurality of stirring blades 15 are circumferentially distributed on the stirring shaft 13, the water adding device includes a liquid outlet pipe 21, a control rod 22, a propping spring 23, a mounting bracket 24, a connecting member 25, a contact plate 26, and a water tank 27, the water tank 27 is fixed at, the liquid outlet pipe 21 is made of hard material, is longitudinally arranged at the lower part of the water tank 27 and is connected with the inside of the water tank 27, the side of the control rod is provided with a plug hole 211, the control rod 22 is transversely arranged, the two ends of the control rod are respectively a control end 221 and a sealing end 222, the control end 221 of the control lever 22 is connected to the upper end of the connecting member 25, the lower end of the connecting member 25 is connected to the contact plate 26, the control rod 22 is provided with an abutting platform 223, the contact plate 26 extends into the stirring barrel 14, the mounting frame 24 is mounted on the lower surface of the water tank 27, the control rod 22 passes through the mounting through hole, the propping spring 23 is sleeved on the control rod 22, one end of which abuts against the abutting table 223 and the other end of which abuts against the mounting frame 24, under the action of the propping spring 23, the sealing end 222 of the control rod 22 is inserted into the insertion hole 211 to close the liquid outlet pipe 21.
Under the above arrangement, the concrete mixer contacts with the concrete in the mixing tank 14 through the contact plate 26, the resistance generated by the concrete is transmitted to the control rod 22, the control rod 22 mainly seals the liquid outlet pipe 21 under the action of the abutting spring 23, when the resistance generated by the concrete is greater than the elastic force provided by the abutting spring 23, the control rod 22 is pulled to exit the insertion hole 211, so that the liquid outlet pipe 21 is opened, the water in the water tank 27 enters the mixing tank 14 through the liquid outlet pipe 21, and the water adding work is realized, in the above process, the on-off state of the liquid outlet pipe 21 is mainly controlled by the resistance generated by the concrete, when the water adding amount of the concrete is insufficient, the viscosity is high, the resistance is large, so that the liquid outlet pipe 21 is opened, the water adding work is performed, when the water adding amount of the concrete is sufficient, the viscosity is small, the resistance generated by the concrete is reduced, so that the liquid outlet pipe 21 is sealed, the water adding work is, and because the water adding device only has the contact plate 26 and the connecting piece 25 to be contacted with the concrete, other parts are not contacted with the concrete, the influence of the concrete on the linkage of the water adding device can be avoided, and the water adding device has better working stability and longer service life.
The device solves the technical problem of automatic water adding, and also solves the problem that the water-cement ratio cannot be strictly determined by manual water adding because the original water content in the raw materials cannot be measured, the water adding amount is not determined by the water content, but is determined by the viscosity of concrete, and the viscosity of the concrete with the specific water-cement ratio can be determined by experiments.
The resisting spring 23 should be strictly selected according to the relevant experiment so that the final water cement ratio of the concrete is determined to be about 0.4.
In order to enable the control rod 22 to generate a better sealing effect, the water adding device further comprises a sealing block, the sealing block is arranged at the sealing end 222 of the control rod 22, and the sealing block extends into the liquid outlet pipe 21.
In the initial stage of concrete mixing, the mixing uniformity is not enough, so that the measurement of the contact plate 26 is possibly inaccurate, and the automatic water adding function is closed at the moment, in order to realize the operation, the water adding device further comprises a propping frame 28 and a propping bolt 29, wherein the propping frame 28 is fixed at the lower part of the water tank 27, a propping screw hole is formed in the propping frame 28, the propping bolt 29 is matched with the propping screw hole, the propping bolt 29 props against the control end 221 of the control rod 22, and the length direction of the propping bolt 29 is parallel to the length direction of the control rod 22. Under the above structure, when the automatic water adding function needs to be closed, the abutting bolt 29 is rotated to abut against the control end 221 of the control rod 22, so that the control rod 22 cannot exit from the insertion hole 211, and the thrust generated by the contact plate 26 cannot push the control rod 22 to move, that is, the automatic water adding function is closed; when the automatic water adding function needs to be started, the abutting bolt 29 is rotated, so that the abutting bolt 29 is far away from the control end 221 of the control rod 22, and the control rod 22 is controlled by the contact plate 26 at the moment, so that the automatic water adding function can be started.
Specifically, the mounting frame 24 and the abutting frame 28 are both configured to be plate-shaped, and the connecting member 25 is configured to be rod-shaped.
Further, the water adding device further comprises a water distributor, the water distributor comprises a connector 31 and a plurality of water distribution pipes 32, the connector 31 is connected with the lower end of the liquid outlet pipe 21, the upper ends of the plurality of water distribution pipes 32 are connected with the connector 31 and are uniformly distributed by taking the connector 31 as a center circumference, the water distribution pipes 32 are obliquely and downwards arranged, the connector 31 is arranged in a hollow mode, and the liquid outlet pipe 21 and the water distribution pipes 32 are connected with the inside of the connector 31.
Under the above-mentioned structural arrangement, the via water that drain pipe 21 flows out passes through connector 31 flows to each water distribution pipe 32, then flows out via each water distribution pipe 32, realizes adding water to the concrete in agitator 14 each position evenly, can effectively promote the degree of consistency of adding water, also can show the work efficiency who promotes the concrete mixing.
Further, the water distributor further includes nozzles 33 disposed in one-to-one correspondence with the plurality of water distribution pipes 32, a lower end of each of the plurality of water distribution pipes 32 is connected to one of the nozzles 33, and a water spraying direction of the nozzle 33 faces a center position of the mixing tank 14. With the above-mentioned structure, each nozzle 33 sprays water toward the center of the concrete, so that the water flow has a large coverage area, and the uniformity of water addition is further improved, and the nozzle 33 is preferably set as a spray nozzle 33.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrases "comprising … …" or "comprising … …" does not exclude the presence of additional elements in a process, method, article, or terminal that comprises the element. Further, herein, "greater than," "less than," "more than," and the like are understood to exclude the present numbers; the terms "above", "below", "within" and the like are to be understood as including the number.
The foregoing description of the embodiments is provided to facilitate an understanding and use of the invention and it will be apparent to those skilled in the art that various modifications to the embodiments and the generic principles defined herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (8)
1. A construction method of a large-doped steel slag micro powder cement composite concrete pavement is characterized by comprising the following steps:
s1, installing a template: placing the template on a base layer according to a paying-off position, and driving steel rods into the base layer from two sides to fix the template, wherein the distance between the steel rods is set to be 1.0-1.5m at the inner side and 0.5-1.0m at the outer side;
s2, mixing and transporting the steel slag micro powder cement concrete with large mixing amount: mixing cement, steel slag micro powder, broken stone, machine-made sand and water by using a concrete mixer, wherein the cement accounts for 200 parts by weight, the steel slag micro powder accounts for 200 parts by weight, the machine-made sand accounts for 1100 parts by weight, the broken stone accounts for 800 parts by weight and the water accounts for 160 parts by weight, and after the mixing is finished, transporting the mixture to a construction site;
s3, paving and compacting: uniformly spreading the materials and then vibrating the materials by using an inserted vibrator;
s4, surface trimming;
s5, joint construction: pouring a joint filling material in the expansion joint, and processing a contraction joint;
s6, preserving health and engraving: and (5) covering a health-preserving film, and engraving before initial setting.
2. The construction method of the steel slag micro powder cement composite concrete pavement with large doping amount as claimed in claim 1, wherein in the step S2, the steel slag micro powder is obtained by ball milling, and the specific surface area of the steel slag micro powder is set to 400-500m2And/kg, adding an active exciting agent in the ball milling process.
3. The construction method of the large-mixing-amount steel slag micro powder cement composite concrete pavement according to claim 1 or 2, characterized in that the concrete mixer comprises a supporting seat, a stirring motor, a stirring shaft, a stirring barrel, stirring blades and a water adding device, wherein the supporting seat is arranged at the bottom of the stirring barrel and used for supporting the stirring barrel, a discharge hole is formed in the bottom of the stirring barrel, the stirring motor is fixed at the bottom of the stirring barrel, the lower end of the stirring shaft is connected with the stirring motor and driven to rotate by the stirring motor, the upper end of the stirring shaft is inserted into the stirring barrel from bottom to top, the stirring blades are provided with a plurality of stirring blades, the stirring blades are circumferentially distributed on the stirring shaft, the water adding device comprises a liquid outlet pipe, a control rod, a butting spring, a mounting rack, a connecting piece, a contact plate and a water tank, and the water tank is fixed at the, the drain pipe adopts hard material to make, and it vertically locates the lower part of water tank and connection the inside of water tank, its lateral part is equipped with the jack, the control lever transversely sets up and its both ends are control end and sealed end respectively, the control end of control lever is connected the upper end of connecting piece, the lower extreme of connecting piece is connected the contact plate, be equipped with on the control lever and support the platform, the contact plate stretches into in the agitator, the mounting bracket install in the lower surface of water tank is equipped with the installation through-hole on it, the control lever passes the installation through-hole, support the spring housing locate on the control lever, its one end support in support bench, the other end support in on the mounting bracket under the effect of supporting the spring, the sealed end of control lever inserts seal in the jack the drain pipe.
4. The construction method of the large-doped steel slag micro powder cement composite concrete pavement as claimed in claim 3, wherein the water adding device further comprises a sealing block, the sealing block is arranged at the sealing end of the control rod, and the sealing block extends into the liquid outlet pipe.
5. The construction method of the large-dosage steel slag micro powder cement composite concrete pavement according to claim 3, characterized in that the water adding device further comprises a propping frame and a propping bolt, the propping frame is fixed at the lower part of the water tank, a propping screw hole is arranged on the propping frame, the propping bolt is matched with the propping screw hole, the propping bolt props against the control end of the control rod, and the length direction of the propping bolt is parallel to the length direction of the control rod.
6. The construction method of the large-doped steel slag micro powder cement composite concrete pavement according to claim 5, wherein the mounting frame and the jacking frame are both plate-shaped, and the connecting piece is rod-shaped.
7. The construction method of the large-doped steel slag micro powder cement composite concrete pavement according to claim 3, characterized in that the water adding device further comprises a water distributor, the water distributor comprises a connector and a plurality of water distribution pipes, the connector is connected with the lower end of the liquid outlet pipe, the upper ends of the plurality of water distribution pipes are connected with the connector and are uniformly distributed by taking the connector as a center circumference, the water distribution pipes are obliquely arranged downwards, the connector is arranged in a hollow manner, and the liquid outlet pipe and the water distribution pipes are connected with the inside of the connector.
8. The construction method of the large-doped steel slag micro powder cement composite concrete pavement according to claim 7, wherein the water distributor further comprises spray heads arranged in one-to-one correspondence with the plurality of water distribution pipes, the lower end of each water distribution pipe in the plurality of water distribution pipes is connected with one spray head, and the water spraying direction of each spray head faces to the center of the stirring barrel.
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