CN113561327A - Anhydrous tank cleaning method for concrete mixer truck - Google Patents
Anhydrous tank cleaning method for concrete mixer truck Download PDFInfo
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- CN113561327A CN113561327A CN202110751128.1A CN202110751128A CN113561327A CN 113561327 A CN113561327 A CN 113561327A CN 202110751128 A CN202110751128 A CN 202110751128A CN 113561327 A CN113561327 A CN 113561327A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/42—Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
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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
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- Structural Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention relates to an anhydrous tank cleaning method for a concrete mixer truck, which comprises the following steps: after unloading, uniformly spraying a water reducing agent into the stirring tank immediately; wherein the amount of the water reducing agent is 1-3 wt% of the concrete excess material; the stirring tank is rotated in a spinning mode, so that the concrete excess materials fall off from the inner wall of the stirring tank. The anhydrous tank cleaning method also comprises the following steps: and (3) adding a balling agent into the concrete excess material according to 4-6 wt per mill of the concrete excess material, enabling the stirring tank to spin at a rotating speed of 4-10 r/min, balling the concrete excess material in the spinning process of the stirring tank, stopping spinning, and discharging to obtain concrete balls with different sizes and shapes. And after the concrete balls are subjected to moisturizing and curing for 3-5 d, the concrete balls can be used as concrete aggregate. The waterless tank cleaning method can be carried out in the process of returning the mixer truck to the station, has high tank cleaning efficiency, good tank cleaning effect and low cost, does not produce water pollution, and can effectively utilize the concrete excess after tank cleaning to achieve the effect of zero emission.
Description
Technical Field
The invention belongs to the field of premixed concrete, and particularly relates to an anhydrous tank cleaning method for a concrete mixer truck.
Background
At present, freshly mixed concrete is mainly transported to a pouring site from a mixing plant by virtue of a mixing truck, after unloading, about 200kg of concrete excess can be remained on the inner wall of the mixing tank, the mixing tank is cleaned by water after the mixing truck returns to the station in a traditional treatment mode, under the condition that the pouring site is far away from the mixing plant, the unloading is finished every time, due to condition limitation, the mixing tank cannot be cleaned in time, the concrete excess is solidified and hardened in the returning process, the concrete excess needs to enter the mixing tank and is manually cleaned by using tools such as an air pick, and time and labor are consumed.
Chinese patent document CN112877144A discloses a cleaning agent and a cleaning method for concrete mixing tank residual materials, the method washes the cleaning agent for the concrete mixing tank residual materials through a high-pressure water gun, organic acid is used for destroying the chemical structure of cured concrete, inorganic abrasive is used for destroying the physical structure of the cured concrete, and then a cement retarder, a cement water reducing agent and a surfactant are used for enhancing the cleaning effect. According to the method, a high-pressure water gun is adopted after the concrete is returned to the station, the concrete excess material is solidified and hardened in the returning process, and the cement slurry is greatly shaken and impacted by the strong washing of the high-pressure water gun, so that part of gel is separated from the surface of cement particles, the cement particle groups which are well bonded originally are dispersed, waste residues are directly converted into muddy loose residues, and the waste residues cannot be utilized. In addition, the high-pressure water cleaning method also causes water pollution.
Disclosure of Invention
In order to solve the problems that the tank can not be cleaned in time due to condition limitation of a water washing tank cleaning mode and the water pollution is caused by the water washing tank cleaning mode, the invention provides a waterless tank cleaning method for a concrete mixer truck, which adds a water reducing agent into a mixing tank to reduce the adhesion force between concrete excess and the inner wall of the mixing tank in the process that the mixer truck returns to a mixing station, and the concrete excess falls off from the inner wall of the mixing tank and is concentrated to the bottom of the tank in the spinning process of the mixing tank; the waterless tank cleaning method has the advantages that the tank cleaning efficiency is high, the cleaning effect is good, and water pollution is avoided. In addition, the concrete balls can be used as recycled aggregate after being cured, so that concrete excess materials are effectively utilized, and the effects of pollution and zero emission are achieved.
The technical scheme provided by the invention is as follows:
an anhydrous tank cleaning method for a concrete mixer truck comprises the following steps:
after unloading, uniformly scattering a water reducing agent into the stirring tank immediately; wherein the amount of the water reducing agent is 1-3 wt% of the concrete excess material;
the stirring tank is rotated in a spinning mode, so that the concrete excess materials fall off from the inner wall of the stirring tank.
The method can be carried out in a construction site or in the return process of a mixer truck, and has the advantages of good tank cleaning effect, high efficiency, clean inner wall of the mixer truck and no water pollution.
Further, the anhydrous tank cleaning method further comprises the following steps: and (3) adding a ball agent into the concrete excess material according to 4-6 wt% of the concrete excess material, enabling the stirring tank to spin at a rotating speed of 4-10 r/min, rolling and forming the concrete excess material in the spinning process of the stirring tank, stopping spinning, and discharging. The invention utilizes the bonding effect and the quick-setting effect of the balling agent to bond the excess concrete into concrete balls with different sizes and shapes, and the concrete balls are easy to roll and more easy to be discharged from the stirring tank without residue.
Preferably, the balling agent comprises the following components in percentage by weight: 3-6% of vanadium mud, 10-20% of quicklime, 25-35% of calcium sulphoaluminate and 40-60% of aluminoxy clinker.
As a further preference of the technical scheme, the balling agent comprises the following components in percentage by weight: 5% of vanadium mud, 15% of quicklime, 30% of calcium sulphoaluminate and 50% of aluminum oxide clinker.
As a further optimization of the technical scheme, after the balling agent is put into the stirring tank, the spinning time of the stirring tank is 2-5 min, and at the moment, all the concrete residual materials are 100% balling.
As the further optimization of the technical scheme, the step of adding the ball agent to the concrete excess is carried out after the concrete excess falls off from the inner wall of the stirring tank and is concentrated to the bottom of the tank, the thickness of the concrete excess remained on the surface of the inner wall is not more than 3mm, and the cleaning effect is better.
Preferably, the concrete remainder is any one of C10, C20, C30, C40, C50, C60, C70, C80 and C100.
Preferably, the water reducing agent is a powdery polycarboxylic acid high efficiency water reducing agent.
As a further preferred mode of the above technical solution, the feeding mode of the balling agent is: (i) throwing the balling agent by compressed air; (ii) isolating the balling agent and the concrete excess material by using an instant bag; or (iii) the balling agent is accumulated on the surface of the concrete excess material and is collected to the bottom of the tank along with the concrete excess material.
As the optimization of the technical scheme, the self-rotating step of the stirring tank is carried out in the return process of the concrete mixer truck, so that the time is saved, and the transportation efficiency is improved.
The anhydrous tank cleaning method also comprises the following steps: and (3) carrying out moisture preservation and maintenance on the concrete balls discharged from the concrete mixer truck for 3-5 days, and using the maintained concrete balls as concrete aggregate, so that the problem of solid waste pollution is solved, and the effect of zero pollution and zero emission is achieved.
The technical scheme provided by the invention has the beneficial effects that:
1. the waterless tank cleaning method for the concrete mixer truck, provided by the invention, can be carried out in the return process of the mixer truck, is high in efficiency and good in cleaning effect, and does not produce water pollution.
2. The concrete balls produced by the waterless tank cleaning method for the concrete mixer truck can be used as recycled aggregate after curing, so that the excess concrete is effectively utilized, the problem of solid waste pollution is solved, and the effect of zero pollution and zero emission is achieved.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The concrete remainder of the invention is as follows.
The concrete excess material refers to fresh concrete which is adhered to the inner wall of the stirring tank after the concrete stirring vehicle is unloaded and cannot fall off automatically, the surface of the fresh concrete is not hardened, and the fresh concrete has certain workability. The weight of the concrete surplus material is the full load weight of the concrete mixer truck, the unloading weight of the construction site and the net weight of the concrete mixer truck.
The concrete ball of the present invention is as follows.
It should be understood that the concrete balls formed by the invention are not standard spherical, but are formed into ball-like concrete balls with different sizes and shapes by rolling and self-bonding during the self-rotation process of the stirring tank, and the size of the ball-like concrete balls is understood to be the two-dimensional maximum length of the irregular ball-like concrete balls. It should be understood that the concrete spheres and the concrete pellets of the present invention are relative concepts, and in the present invention, the size of the concrete spheres is more than or equal to 5mm, and the concrete spheres can be used as concrete coarse aggregates after curing; the size of the concrete ball is less than 5mm, and the concrete ball can be used as concrete fine aggregate after curing.
The water reducing agent of the present invention is as follows.
In order to improve the fluidity of the concrete excess material, a water reducing agent with a viscosity reducing effect is uniformly scattered in a stirring tank, preferably a polycarboxylic acid high-efficiency water reducing agent, and more preferably a powdery polycarboxylic acid high-efficiency water reducing agent; the mixing amount is preferably 1-3% of the weight of the concrete excess, the viscosity of the concrete excess is reduced after the concrete excess is mixed with the water reducing agent, fluid concrete is formed, and the thickness of slurry on the surface of a steel flat plate is required to be not more than 3mm after the steel flat plate with the temperature of 15 ℃ flows through, so that an ideal tank cleaning effect is achieved. When the mixing amount of the water reducing agent is 0.5 percent of the weight of the concrete excess material, the mixing amount of the water reducing agent is small, on one hand, the cohesiveness between the inner wall of the stirring tank and the concrete excess material cannot be thoroughly opened, no fluid concrete can be formed, and the tank cleaning effect is poor; on the other hand, the pelletizing effect of the concrete excess is not obvious, because the bonding effect among the fluid concrete, the formed concrete balls and the stones is not ideal, so that more small concrete balls and less large concrete balls are caused, and a small amount of concrete excess is adhered to the inner wall of the stirring tank; 3 percent of water reducing agent is added, the concrete excess forms fluid concrete with good fluidity, no residual concrete excess is left on the inner wall of the stirring tank by visual inspection, the concrete excess can better form concrete balls after the balling agent is added, and the balling effect is good. Thus, the amount of the water reducing agent is preferably 3%, and may be determined as appropriate.
The balling agent of the present invention is as follows.
In order to facilitate taking out the fluid concrete which slides to the bottom of the tank from the stirring tank, a balling agent is put into the bottom of the stirring tank, the main components of the balling agent are aluminum oxide clinker with a quick setting effect, calcium sulphoaluminate and vanadium mud with an early strength effect and quick lime for improving the concrete bonding effect, and the balling agent comprises the following components in percentage by weight: 3-6% of vanadium mud, 10-20% of quicklime, 25-35% of calcium sulphoaluminate and 40-60% of aluminous clinker; as a further preference of the technical scheme, the balling agent comprises the following components in percentage by weight: 5% of vanadium mud, 15% of quicklime, 30% of calcium sulphoaluminate and 50% of aluminum oxide clinker. The mixture is mixed into the fluid concrete at the bottom of the tank, and the fluid concrete can be rapidly formed into balls by 100 percent in the self-rotating process of the stirring tank. The putting mode of the balling agent is a non-contact mode: (i) throwing the balling agent by compressed air; (ii) isolating the balling agent and the concrete excess material by using an instant bag; or (iii) the balling agent is accumulated on the surface of the concrete excess material and is concentrated to the bottom of the tank along with the concrete excess material; but is not limited to the above. The mixing amount of the balling agent is related to the weight of the concrete excess material, and the specific mixing amount is 4-6 wt% of the weight of the concrete excess material. For example, when 5 wt% of balling agent is added into 200kg of concrete excess, the balling effect is obvious, 100% of the concrete excess in the stirring tank is balling, the size range of the concrete ball is 5-20 mm, the concrete ball can be completely used as the recycled coarse aggregate after being cured for a period of time, and the inner wall of the stirring tank is clean and has no adhesive material; the balling agent is added according to 6wt per mill of the concrete excess material, the cleaning effect of the stirring tank is ideal, the particle size of the concrete ball is larger than that of the former two, the size of the concrete ball is 10-31.5 mm, and the inner wall of the stirring tank is clean and has no adhesive material. The amount of the balling agent is recommended to be 5 per mill, and can be determined according to the situation.
The vanadium sludge of the present invention is as follows.
The vanadium slag roasting clinker is subjected to dense leaching, and soluble impurities such as silicon, phosphorus and the like enter a vanadium leaching solution along with the dissolution of sodium vanadate. The vanadium mud is a sediment of impurity elements and fine ion groups suspended in the vanadium liquid, which is flocculated by adopting an aluminum flocculant under an alkaline condition.
The aluminoxy clinker of the present invention is as follows.
The aluminum oxide clinker of the invention is prepared from bauxite ore (the main component is NaAlO)2Wherein NaAlO2The content can reach 60% -80%) through calcining.
The balling process of the present invention is as follows.
And starting stirring after the balling agent is put in, stopping stirring after the stirring tank spins for about 2-5 min at a speed not lower than 4-10 r/min, balling all the concrete remainder 100%, and unloading in a specified stockpiling area after the stirring vehicle returns to the stirring station. When the stirring tank spins at the speed of 2r/min, the cleaning effect of the inner wall of the stirring tank is poor, the cohesiveness inside the concrete ball is poor, the concrete ball is loose, and the balling effect is not ideal. The reason is that the rotating speed of the stirring tank is too slow, and the materials are not well combined, so that the small balls of the concrete are increased, and the large balls of the concrete are reduced. When the stirring tank is rotated at a speed of 4-10 r/min, the cleaning effect of the inner wall of the stirring tank is ideal, the thickness of the residual concrete on the surface of the inner wall is not more than 3mm, the cohesiveness inside the concrete ball is good, and the effects of balling and cleaning the tank are ideal. When the stirring tank spins at a speed of 15r/min, the rotating speed of the stirring tank is too high, so that the concrete balls which are just bonded are scattered, the balling effect is poor, no 100% of the concrete balls are formed, and the rotating speed of the stirring tank is preferably 4-10 r/min.
The curing step of the present invention is as follows.
The concrete ball can be cured to 28 days or above after being subjected to moisturizing curing for 3-5 days, but not limited to 5 days, so that a recycled aggregate finished product with different strength grades is prepared.
The present invention will be described in more detail below based on embodiments. The invention is capable of modification in various ways and of embodiment.
The balling agents used in the following examples are all composed of the following components (in weight percent): 5% of vanadium mud, 15% of quicklime, 30% of calcium sulphoaluminate and 50% of aluminum oxide clinker. The water reducing agents are all produced by Jiangsu Subo new material company Limited
A polycarboxylic acid high-efficiency water reducing agent.
Example 1
In this embodiment, the weight of the whole mixer truck for transporting the C30 concrete is about 13200kg before loading, and the weight of the whole mixer truck is about 13400kg before unloading, that is, the weight of the concrete remainder is about 200kg, and the stone content of the concrete remainder is about 50 kg. Before discharging, the water-cement ratio of the C30 concrete is 0.46, the mixing amount of the water reducing agent is 2%, the slump is 230mm, and the expansion is 590 mm.
After unloading, uniformly spraying a polycarboxylic acid high-efficiency water reducing agent into the stirring tank body, wherein the using amount of the water reducing agent is 3 wt% of the concrete residual material, namely 6 kg; in the process of returning, the stirring tank is rotated at the rotating speed of 10r/min, so that the concrete excess material completely slides to the bottom of the tank from the inner wall of the stirring tank; according to 5wt per thousand of the concrete excess material, 1kg of balling agent is added into the tank bottom through compressed air, the stirring tank is enabled to spin at the rotating speed of 10r/min, the concrete excess material is balling in the spinning process of the stirring tank, spinning is stopped after 5min, discharging is carried out after arriving at a station, the weight of the discharged concrete ball is about 200kg, and the thickness of the residual concrete excess material on the inner wall of the stirring tank is not more than 3 mm.
Example 2
On the basis of the unchanged other parameters of the embodiment 1, the embodiment changes the input amount of the balling agent, and researches the influence of the input amount of the balling agent on the tank cleaning effect:
experiment 2-1: the input amount of the balling agent is 4wt per mill of the concrete remainder: the tank cleaning effect is good, the balling effect is not obvious, the size range of the concrete balls is 2-10 mm, the concrete balls (with the size of 2-5 mm) account for a large amount, about 20 wt%, and the concrete balls (with the size of 5-10 mm) account for 80 wt%.
Experiment 2-2: the input amount of the balling agent is 5 per mill of the concrete excess material: the inner wall of the stirring tank is clean and free of adhesive materials, the balling effect is obvious, the residual concrete in the stirring tank is 100% balled, the size range of the concrete balls is 5-20 mm, and the balled concrete balls can be completely used as recycled coarse aggregate after being cured.
Experiment 2-3: the input amount of the balling agent is 6 per mill of the concrete excess material: the inner wall of the stirring tank is clean, the cleaning effect of the stirring tank is ideal, and the size of the concrete ball is larger than that of the concrete balls in experiments 2-1 and 2-2, and the size range of the concrete ball is 10-31.5 mm.
The amount of the balling agent is recommended to be 5 wt% of the concrete remainder, and can be determined according to the situation.
Example 3
On the basis of the unchanged other parameters of the embodiment 1, the input amount of the water reducing agent is changed, and the influence of the input amount of the water reducing agent on the tank cleaning effect is researched:
experiment 3-1: the input amount of the water reducing agent is 1 wt% of the concrete remainder: the balling effect is not obvious because the input of the water reducing agent is small, cohesiveness between the inner wall of the stirring tank and the concrete remainder is not thoroughly opened, and fluid concrete cannot be completely formed, so that the cohesiveness of the fluid concrete, the formed concrete balls and stones is not ideal, the number of the concrete balls (with the size less than 5mm) is large, the number of the concrete balls (with the size more than or equal to 5mm) is small, a small amount of the concrete remainder is adhered to the inner wall of the stirring tank, the thickness of the concrete remainder remained on the inner wall of the stirring tank is more than 6mm, the size of the concrete balls is integrally small, and the cleaning effect of the stirring tank is poor.
Experiment 3-2: the input amount of the water reducing agent is 3 wt% of the concrete remainder: the concrete excess materials form fluid concrete, the inner wall of the stirring tank is not provided with bonded concrete excess materials, and the thickness of the concrete excess materials remained on the inner wall of the stirring tank is not more than 3 mm; after the balling agent is added, concrete balls can be well formed, and the balling effect and the cleaning effect of the stirring tank are ideal.
The amount of water reducing agent added is recommended to be 3 wt% of the concrete remainder, as the case may be.
Example 4
On the basis of the unchanged other parameters in the embodiment 1, the rotating speed (2r/min, 4-10 r/min and 15r/min) of the stirring tank in the balling process is changed in the embodiment, and the influence of the rotating speed of the stirring tank on the balling effect is researched:
experiment 4-1: the rotating speed of the stirring tank is 2 r/min: the cleaning effect of the stirring tank is poor, the cohesiveness in the concrete balls is poor, the concrete balls are loose, and the effect is not ideal. The reason is that the agitator tank rotates too slowly and there is not a good combination of materials. Resulting in the increase of small concrete balls (the size is less than 5mm) and the decrease of large concrete balls (the size is more than or equal to 5 mm).
Experiment 4-2: the rotating speed of the stirring tank is 4-10 r/min: the cleaning effect of agitator tank is ideal, and the remaining concrete clout thickness of agitator tank inner wall is not more than 3mm, and the inside cohesiveness of concrete ball is good, and difficult the scattering becomes the effect ideal of balling-up and clear jar.
Experiment 4-3: the rotating speed of the stirring tank is 15 r/min: because the rotating speed of the stirring tank is too high, the concrete balls which are just bonded into balls are scattered, the ball forming effect is poor, and the concrete surplus material does not form 100% of the concrete balls.
The reasonable rotating speed of the stirring tank is recommended to be 4-10 r/min.
Example 5
The same method and parameters as those in example 1 are adopted to carry out tank cleaning on a mixer truck for transporting C40 and C50 concrete, after unloading, the inner wall of the mixer truck is clean and has no binder, the balling effect is obvious, the concrete remainder in the mixer truck is 100% balled, the size range of the concrete ball is 5-20 mm, and the balled concrete ball can be completely used as a recycled coarse aggregate after curing.
In conclusion, the high-efficiency polycarboxylate superplasticizer is used as a dispersing agent for waterless tank cleaning, so that excess concrete on the inner wall of the stirring tank can fall off, fluid concrete is formed in the stirring tank and slides to the bottom of the stirring tank, the tank cleaning process can be carried out in the return process of the stirring truck, the tank cleaning efficiency is high, the cleaning effect is good, and new pollution is not generated. Secondly, adding a balling agent which is 4-6 wt% of the concrete excess, rotating at a speed of not less than 4-10 r/min for 2-5 min, rolling and forming the fluid concrete at the bottom of the stirring tank to form concrete balls, unloading materials by utilizing the characteristic that the concrete balls are easy to roll, and ensuring that the materials are completely unloaded after the stirring tank is cleaned. Finally, the concrete ball can be used as concrete aggregate after being cured, so that not only can the concrete excess be effectively utilized, but also the problem of solid waste pollution is solved, and the effect of zero pollution emission is achieved.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A waterless tank cleaning method for a concrete mixer truck is characterized by comprising the following steps:
after unloading, uniformly spraying a water reducing agent into the stirring tank immediately; wherein the amount of the water reducing agent is 1-3 wt% of the concrete excess material;
the stirring tank is rotated in a spinning mode, so that the concrete excess materials fall off from the inner wall of the stirring tank.
2. The waterless tanking method for concrete mixer vehicles according to claim 1, characterized in that: also comprises the following steps: and (3) adding a balling agent into the concrete excess material according to 4-6 wt per mill of the concrete excess material, enabling the stirring tank to spin at a rotating speed of 4-10 r/min, balling the concrete excess material in the spinning process of the stirring tank, stopping spinning, and discharging.
3. The waterless tanking method for concrete mixer vehicles according to claim 2, characterized in that: the balling agent comprises the following components in percentage by weight: 3-6% of vanadium mud, 10-20% of quicklime, 25-35% of calcium sulphoaluminate and 40-60% of aluminoxy clinker.
4. A method of waterless tanking for a concrete mixer truck according to claim 3, characterized in that: the balling agent comprises the following components in percentage by weight: 5% of vanadium mud, 15% of quicklime, 30% of calcium sulphoaluminate and 50% of aluminum oxide clinker.
5. The waterless tanking method for concrete mixer vehicles according to claim 2, characterized in that: after the balling agent is put into the stirring tank, the spinning time of the stirring tank is 2-5 min.
6. The anhydrous can cleaning method for a concrete mixer truck according to any one of claims 1 to 5, characterized in that: the concrete excess is any one of C10, C20, C30, C40, C50, C60, C70, C80 and C100.
7. The waterless tanking method for a concrete mixer truck according to claim 6, characterized in that: the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent.
8. The anhydrous can cleaning method for a concrete mixer truck according to any one of claims 2 to 5, characterized in that: the feeding mode of the balling agent is as follows: (i) throwing the balling agent by compressed air; (ii) isolating the balling agent and the concrete excess material by using an instant bag; or (iii) the balling agent is accumulated on the surface of the concrete excess material and is collected to the bottom of the tank along with the concrete excess material.
9. The anhydrous can cleaning method for a concrete mixer truck according to any one of claims 2 to 5, characterized in that: the step of adding the balling agent to the concrete excess is carried out after the concrete excess is thrown off from the inner wall of the stirring tank and is concentrated to the bottom of the tank.
10. The anhydrous can cleaning method for a concrete mixer truck according to any one of claims 2 to 5, characterized in that: also comprises the following steps: and (4) carrying out moisture preservation and maintenance on the concrete balls discharged from the stirring tank for 3-5 days, wherein the well-maintained concrete balls are used as concrete aggregate.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114986702A (en) * | 2022-06-15 | 2022-09-02 | 李春明 | Cleaning method for cement concrete mixing tank truck |
| CN115090630A (en) * | 2022-06-27 | 2022-09-23 | 三一电动车科技有限公司 | Method and device for cleaning concrete mixing tank and vehicle |
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| CN114986702A (en) * | 2022-06-15 | 2022-09-02 | 李春明 | Cleaning method for cement concrete mixing tank truck |
| CN115090630A (en) * | 2022-06-27 | 2022-09-23 | 三一电动车科技有限公司 | Method and device for cleaning concrete mixing tank and vehicle |
| CN115090630B (en) * | 2022-06-27 | 2023-05-12 | 三一电动车科技有限公司 | Method and device for cleaning concrete stirring tank and vehicle |
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