CN115304329B - Efficient retarding and water-reducing gold tailing concrete and preparation method thereof - Google Patents
Efficient retarding and water-reducing gold tailing concrete and preparation method thereof Download PDFInfo
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- CN115304329B CN115304329B CN202210983222.4A CN202210983222A CN115304329B CN 115304329 B CN115304329 B CN 115304329B CN 202210983222 A CN202210983222 A CN 202210983222A CN 115304329 B CN115304329 B CN 115304329B
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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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland 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
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
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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
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/20—Retarders
- C04B2103/22—Set retarders
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
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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
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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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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Abstract
The application relates to the technical field of building materials, and particularly discloses high-efficiency retarding and water-reducing gold tailing concrete and a preparation method thereof. The efficient delayed coagulation water-reducing gold tailing concrete comprises the following raw materials in parts by weight: the material comprises the following raw materials in parts by weight: 280-400 parts of cementing material, 600-650 parts of sand, 120-160 parts of gold tailings, 1000-1020 parts of stone, 140-160 parts of water and 7.2-14 parts of retarder water-reducing additive; the retarding water-reducing additive is prepared from components including starch, dichloroethane, chlorosulfonic acid, acrylic acid and polyethylene oxide through steps including mixing, heating and stirring. The method has the advantage of enabling the gold tailing concrete to have excellent retarding and water reducing effects.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to high-efficiency retarding and water-reducing gold tailing concrete and a preparation method thereof.
Background
In recent years, with the increasing emphasis of national environmental protection, the mining cost of building materials has been significantly increased, thereby increasing the production cost of concrete. The gold tailings are used as waste after crushing and grinding the gold ores, wherein the silicon dioxide content is high, and the gold tailings also contain partial aluminum oxide, magnesium oxide and ferric oxide, so that a foundation support is provided for the application of the gold tailings in concrete production.
At present, when gold tailings are used as raw materials for producing concrete, the gold tailings are generally required to be screened and subjected to particle grading before being used, because when the gold tailings are excessively fine in particle size, the specific surface area of the gold tailings is increased, and a large number of cracks and pores are generated on the surface of the gold tailings due to the crushing effect in the ore dressing process, so that a large amount of water for mixing the concrete is adsorbed by the gold tailings.
In view of the above-mentioned related art, the inventors consider that concrete having an excessively fine particle diameter adsorbs a large amount of water for mixing concrete, which makes the concrete insufficiently hydrated, and thus adversely affects retarder performance and workability of the concrete.
Disclosure of Invention
In order to prepare and obtain the retarder and water reducing performance of the gold tailing concrete, the application provides the efficient retarder and water reducing gold tailing concrete and a preparation method thereof.
In a first aspect, the application provides a high-efficiency retarding and water-reducing gold tailing concrete, which adopts the following technical scheme: the efficient delayed coagulation water-reducing gold tailing concrete comprises the following raw materials in parts by weight: 280-400 parts of cementing material, 600-650 parts of sand, 120-160 parts of gold tailings, 1000-1020 parts of stone, 140-160 parts of water and 7.2-14 parts of retarder water-reducing additive; the retarding water-reducing additive is prepared from components including starch, dichloroethane, chlorosulfonic acid, acrylic acid and polyethylene oxide through steps including mixing, heating and stirring.
By adopting the technical scheme, when the grain size of the gold tailings is too fine, the specific surface area is increased, and the surface of the gold tailings can generate more microcracks and pores due to the crushing effect in the ore selection process, and the microcracks and the pores can absorb a large amount of water for mixing concrete, so that the concrete slurry can not be fully hydrated, and the retarding performance and the working performance of the concrete are further affected.
The retarder water-reducing additive is added into the concrete, and firstly, the retarder water-reducing additive is prepared into a hydrogel form, so that the retarder water-reducing additive has the functions of water retention and retarder, the connectivity of gold tailings to pores of the concrete after the gold tailings are added into the concrete is reduced, the water mobility in the concrete is reduced, and the absorption of the gold tailings to the concrete mixing water is reduced, so that the water-retaining effect on the gold tailings concrete is realized; in addition, a three-dimensional net structure is formed in the concrete in the cement hydration process, so that the setting time of the concrete is delayed while the cement hydration heat is reduced, and the retarding effect on the gold tailing concrete is achieved; secondly, after the retarding and water reducing admixture in the form of hydrogel is added into concrete, the retarding and water reducing admixture has extremely strong hydrophilicity, hydrophilic sulfonic acid groups are introduced into the retarding and water reducing admixture, the thickness of a dissolving water film on the surfaces of gold tailings and cement particles is increased, the working performance of the concrete is improved, and further, the retarding and water reducing admixture can exert relatively strong water reducing effect in a concrete system; finally, the addition of the polyethylene oxide can further improve the water retention and retarding effects of the retarding water-reducing admixture on the gold tailing concrete, reduce the negative influence of the use of the gold tailings on the water retention and retarding performance of the concrete, and further improve the working performance of the concrete.
Optionally, the retarding and water reducing additive comprises the following raw materials in parts by weight: 8-12 parts of starch, 120-180 parts of dichloroethane, 2-5 parts of chlorosulfonic acid, 6-10 parts of acrylic acid, 3-5 parts of polyethylene oxide and 30-36 parts of water.
By adopting the technical scheme, the raw materials fully react to form the retarding and water reducing additive with the hydrogel form, and the negative influence on the coagulation and working performance of the concrete after the gold tailings are added into the concrete is reduced, so that the retarding and water reducing effect excellent gold tailings concrete is prepared.
Optionally, the retarding and water reducing additive is prepared by a method comprising the following steps:
s1: mixing starch with dichloroethane and chlorosulfonic acid, heating, and stirring to obtain modified starch;
s2: mixing modified starch, acrylic acid, polyethylene oxide and water, heating, stirring, drying and grinding to obtain the delayed coagulation water-reducing additive.
By adopting the technical scheme, after the starch is modified, the modified starch, the acrylic acid and the polyethylene oxide can be fully combined and reacted to prepare the retarding and water-reducing additive with excellent retarding and water-reducing performances.
Optionally, the heating temperature in S1 is 30-50 ℃, and the stirring time is 3-5h; and S2, heating at 50-70 ℃ and stirring for 5-8h.
By adopting the technical scheme, the raw materials react with each other to prepare the retarding water reducer with excellent retarding and water reducing performances, so that the gold tailing concrete with excellent retarding and water reducing performances is prepared.
Optionally, the particle size of the gold tailings is 50-300 mu m.
By adopting the technical scheme, the gold tailings with smaller particle size are used, so that the utilization rate of the gold tailings is comprehensively improved.
Optionally, 14-20 parts of semen Ziziphi Spinosae powder is also included.
By adopting the technical scheme, on one hand, the jujube kernel powder can be adhered to the surface of the gold tailings, so that the absorption of the gold tailings to the concrete mixing water is reduced, and more concrete mixing water can participate in the cement hydration process; on the other hand, the jujube kernel powder can be adhered to the surface of cement particles to inhibit the progress of cement hydration reaction, thereby playing a role in retarding the gold tailing concrete.
Optionally, 0.6-1 part of zinc chloride is also included.
By adopting the technical scheme, the zinc chloride and the coagulation water-reducing additive have good suitability, so that the zinc chloride and the coagulation water-reducing additive act together to further improve the retarding effect of the gold tailing concrete.
In a second aspect, the application provides a preparation method of high-efficiency delayed coagulation water-reducing gold tailing concrete, which adopts the following technical scheme:
the preparation method of the high-efficiency delayed coagulation water-reducing gold tailing concrete comprises the following steps:
step one, mixing water, a retarding water-reducing additive and zinc chloride to prepare a prefabricated liquid;
and step two, mixing the cementing material, the jujube kernel powder, the sand, the gold tailings, the stone and the prefabricated liquid, and stirring to obtain the high-efficiency retarding and water-reducing gold tailings concrete.
By adopting the technical scheme, the raw materials are fully reacted, and the gold tailing concrete with excellent retarding and water reducing performances is prepared.
In summary, the present application has the following beneficial effects:
1. the hydrogel type retarding and water reducing additive prepared by the method can reduce capillary pore connectivity in the gold tailing concrete and form a three-dimensional net structure in the concrete after being added into the gold tailing concrete, so that the setting time of the concrete is delayed; and secondly, the retarding and water reducing additive in the form of hydrogel can further improve the thickness of the water film on the surfaces of the gold tailings and the cement particles under the action of the sulfonic acid group, and reduce the friction force between the cement particles and the gold tailings, so that the working performance of the concrete is improved, and an excellent water reducing effect is generated on the gold tailings concrete.
2. According to the method, the jujube kernel powder is added, firstly, the jujube kernel powder can be adhered to the surface of the gold tailings, so that the absorption of the gold tailings to the concrete mixing water is reduced, and more concrete mixing water can participate in the cement hydration process; secondly, the jujube kernel powder can be adhered to the surface of cement particles to inhibit the progress of cement hydration reaction, so that a retarding effect is achieved on the gold tailing concrete; finally, the jujube kernel powder, the retarding and water-reducing additive and the concrete preparation raw materials have good suitability, so that the jujube kernel powder and the retarding and water-reducing additive can act together on the premise of not influencing the mechanical properties of the concrete, and the retarding effect of the gold tailing concrete is improved.
Detailed Description
The present application is described in further detail below with reference to examples.
Preparation example of retarder water-reducing admixture
Preparation example 1
The retarder water-reducing additive comprises the following raw materials in parts by weight:
8g of starch, 120g of dichloroethane, 2g of chlorosulfonic acid, 6g of acrylic acid, 3g of polyethylene oxide and 30g of water.
The retarder water-reducing additive is prepared by the following steps:
s1: mixing starch with dichloroethane and chlorosulfonic acid, heating and stirring at 30deg.C for 5 hr, and drying at 30deg.C for 25 hr to obtain modified starch;
s2: mixing modified starch, acrylic acid, polyethylene oxide and water, heating and stirring at 50 ℃ for 8 hours, drying at 30 ℃ for 20 hours, and grinding to obtain the retarding water-reducing admixture.
Preparation example 2
The retarder water-reducing additive comprises the following raw materials in parts by weight:
12g of starch, 180g of dichloroethane, 5g of chlorosulfonic acid, 10g of acrylic acid, 5g of polyethylene oxide and 36g of water.
The retarder water-reducing additive is prepared by the following steps:
s1: mixing starch with dichloroethane and chlorosulfonic acid, heating and stirring at 50deg.C for 3 hr, and drying at 40deg.C for 15 hr to obtain modified starch;
s2: mixing modified starch, acrylic acid, polyethylene oxide and water, heating and stirring for 5h at 70 ℃, drying for 10h at 40 ℃, and grinding to obtain the retarding water-reducing additive.
Preparation example 3
The retarder water-reducing additive comprises the following raw materials in parts by weight:
10g of starch, 150g of dichloroethane, 3.5g of chlorosulfonic acid, 8g of acrylic acid, 4g of polyethylene oxide and 33g of water.
The retarder water-reducing additive is prepared by the following steps:
s1: mixing starch with dichloroethane and chlorosulfonic acid, heating and stirring at 40deg.C for 4 hr, and drying at 35deg.C for 20 hr to obtain modified starch;
s2: mixing modified starch, acrylic acid, polyethylene oxide and water, heating and stirring at 60 ℃ for 6.5 hours, drying at 50 ℃ for 15 hours, and grinding to obtain the retarding water-reducing additive.
Preparation example 4
The retardation water-reducing admixture is different from that of preparation example 3 in that chlorosulfonic acid is not used in the preparation process.
Preparation example 5
The retardation water-reducing admixture is different from that of preparation example 3 in that acrylic acid is not used in the preparation process.
Preparation example 6
The retardation water-reducing admixture is different from that of preparation example 3 in that polyethylene oxide is not used in the preparation process.
Examples
In this example, the cement used was cement with a labeled strength of p.o.42.5.
Example 1
The high-efficiency delayed coagulation water-reducing gold tailing concrete comprises the following raw materials in parts by weight: 280kg of cementing material, 600kg of sand, 120kg of gold tailings, 1000kg of stone, 140kg of water, 7.2kg of retarding and water reducing additive, 14kg of jujube kernel powder and 0.6kg of zinc chloride, wherein the retarding and water reducing additive is prepared by preparation example 1.
The high-efficiency retarding and water-reducing gold tailing concrete is prepared by the following steps:
step one, mixing water, a retarding water-reducing additive and zinc chloride to prepare a prefabricated liquid;
and step two, mixing the cementing material, the jujube kernel powder, the sand, the gold tailings, the stone and the prefabricated liquid, and stirring to obtain the high-efficiency retarding and water-reducing gold tailings concrete.
Example 2
The high-efficiency delayed coagulation water-reducing gold tailing concrete comprises the following raw materials in parts by weight: 400kg of cementing material, 650kg of sand, 160kg of gold tailings, 1020kg of stone, 160kg of water, 14kg of retarder water-reducing additive, 20kg of jujube kernel powder and 1kg of zinc chloride, wherein the retarder water-reducing additive is prepared by preparation example 2.
The high-efficiency retarding and water-reducing gold tailing concrete is prepared by the following steps:
step one, mixing water, a retarding water-reducing additive and zinc chloride to prepare a prefabricated liquid;
and step two, mixing the cementing material, the jujube kernel powder, the sand, the gold tailings, the stone and the prefabricated liquid, and stirring to obtain the high-efficiency retarding and water-reducing gold tailings concrete.
Example 3
The high-efficiency delayed coagulation water-reducing gold tailing concrete comprises the following raw materials in parts by weight: 340kg of cementing material, 625kg of sand, 140kg of gold tailings, 1010kg of stone, 150kg of water, 10.6kg of retarding and water reducing additive, 17kg of jujube kernel powder and 0.8kg of zinc chloride, wherein the retarding and water reducing additive is prepared by preparation example 3.
The high-efficiency retarding and water-reducing gold tailing concrete is prepared by the following steps:
step one, mixing water, a retarding water-reducing additive and zinc chloride to prepare a prefabricated liquid;
and step two, mixing the cementing material, the jujube kernel powder, the sand, the gold tailings, the stone and the prefabricated liquid, and stirring to obtain the high-efficiency retarding and water-reducing gold tailings concrete.
Example 4
An efficient delayed coagulation water-reducing gold tailing concrete is different from the concrete in example 3 in that jujube kernel powder is not used in the preparation process.
Example 5
An efficient delayed coagulation water-reducing gold tailing concrete is different from example 3 in that zinc chloride is not used in the preparation process.
Comparative example
Comparative example 1
The high-efficiency delayed coagulation water-reducing gold tailing concrete is different from the concrete of the embodiment 3 in that a delayed coagulation water-reducing additive used in the preparation process is prepared from the preparation example 4.
Comparative example 2
The high-efficiency delayed coagulation water-reducing gold tailing concrete is different from the concrete in the embodiment 3 in that a delayed coagulation water-reducing additive used in the preparation process is prepared from a preparation example 5.
Comparative example 3
The high-efficiency delayed coagulation water-reducing gold tailing concrete is different from the concrete of the embodiment 3 in that the delayed coagulation water-reducing additive used in the preparation process is prepared from the preparation example 6.
Comparative example 4
The high-efficiency concrete with water-reducing gold tailings is different from the concrete in the embodiment 3 in that 2.1kg of commercial sodium gluconate and 8.5kg of commercial sulfonate water reducer are used for replacing 10.6kg of retarding water-reducing additive in the preparation process.
Comparative example 5
An efficient concrete water-reducing gold tailing concrete is different from the concrete of the embodiment 3 in that a retarding water-reducing additive is not used in the preparation process.
Detection method
1. Concrete compressive strength test
The concrete prepared in examples 1 to 5 and comparative examples 1 to 5 was subjected to a 28d compressive strength test according to GB/T50081-2002 Standard test methods for mechanical Properties of ordinary concrete. And continuously and uniformly loading in the test process, taking 0.5-0.8 MPa per second when the strength grade of the concrete is more than or equal to C30 and less than C60, stopping adjusting the accelerator of the test machine when the test piece is close to the damage and begins to deform sharply until the test piece is damaged, and recording the damage load in the table 1.
2. Testing of initial setting time and final setting time of concrete
The ready-mixed concretes prepared in examples 1 to 5 and comparative examples 1 to 5 were subjected to initial setting time and final setting time tests according to GB/T50080-2016 method for testing general concrete mix properties, and the test data were recorded in Table 1.
3. Concrete slump and expansion test
Slump and expansion degree tests were carried out on ready-mixed concretes prepared in examples 1 to 5 and comparative examples 1 to 5, and test data were recorded in Table 1 according to GB/T50080-2016 "method for testing general concrete mix properties".
TABLE 1
By combining examples 1-5, comparative examples 1-3, 5 and Table 1, it can be seen that after the retarder water reducer is added, the retarder water reducer in the form of hydrogel can reduce capillary connectivity in the gold tailing concrete, reduce migration of water in the concrete, thereby reducing absorption effect of the gold tailing on concrete mixing water, enabling more concrete mixing water to participate in the cement hydration process and generating retarder effect on the concrete, therefore, initial setting time and final setting time of the gold tailing concrete are both increased due to addition of retarder water reducing additives; in addition, due to the hydrophilicity of the hydrogel network and the effect of the introduced sulfonic acid groups, a layer of dissolved water film is formed on the surfaces of the gold tailing cement particles, and the dissolved water film plays a role in lubricating concrete slurry, so that the working performance of the gold tailing concrete is improved, and after the retarding water-reducing additive is added, the slump and the expansion of the gold tailing concrete are obviously increased, and the fluidity and the water-retaining performance of the gold tailing concrete are obviously improved; finally, the addition of the polyethylene oxide component can further improve the water retention and solidification inhibition effect of the retarding water-reducing additive on the gold tailing concrete, and further improve the working performance of the concrete.
By combining example 3, comparative example 4 and Table 1, it can be seen that, compared with the conventional water reducing agent and retarder for concrete, the retarder water reducing additive prepared by the application has longer initial setting time and final setting time, and larger slump and expansion of concrete, so that the retarder water reducing additive prepared by the application has more excellent retarder and water reducing effect and is multifunctional.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (7)
1. The utility model provides a high-efficient retarding subtracts water gold tailing concrete which characterized in that: the material comprises the following raw materials in parts by weight: 280-400 parts of cementing material, 600-650 parts of sand, 120-160 parts of gold tailings, 1000-1020 parts of stone, 140-160 parts of water, 7.2-14 parts of retarder water-reducing additive and 14-20 parts of jujube kernel powder;
the retarding and water reducing additive is prepared from the components of starch, dichloroethane, chlorosulfonic acid, acrylic acid and polyethylene oxide through the steps of mixing, heating and stirring.
2. The efficient delayed coagulation water-reducing gold tailing concrete as claimed in claim 1, wherein: the retarding and water reducing additive comprises the following raw materials in parts by weight: 8-12 parts of starch, 120-180 parts of dichloroethane, 2-5 parts of chlorosulfonic acid, 6-10 parts of acrylic acid, 3-5 parts of polyethylene oxide and 30-36 parts of water.
3. The efficient delayed coagulation water-reducing gold tailing concrete as claimed in claim 2, wherein: the retarding water-reducing additive is prepared by a method comprising the following steps:
s1: mixing starch with dichloroethane and chlorosulfonic acid, heating, stirring, and drying to obtain modified starch;
s2: mixing modified starch, acrylic acid, polyethylene oxide and water, heating, stirring, drying and grinding to obtain the delayed coagulation water-reducing additive.
4. A high efficiency retarded and water-reducing gold tailing concrete according to claim 3, wherein: s1, heating at 30-50 ℃ and stirring for 3-5h; and S2, heating at 50-70 ℃ and stirring for 5-8h.
5. The efficient delayed coagulation water-reducing gold tailing concrete as claimed in claim 1, wherein: the grain size of the gold tailings is 50-300 mu m.
6. The efficient delayed coagulation water-reducing gold tailing concrete as claimed in claim 1, wherein: also comprises 0.6-1 part of zinc chloride.
7. The method for preparing the high-efficiency delayed coagulation water-reducing gold tailing concrete, which is characterized by comprising the following steps of: the method comprises the following steps:
step one, mixing water, a retarding water-reducing additive and zinc chloride to prepare a prefabricated liquid;
and step two, mixing the cementing material, the jujube kernel powder, the sand, the gold tailings, the stone and the prefabricated liquid, and stirring to obtain the high-efficiency retarding and water-reducing gold tailings concrete.
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| CN115304329B true CN115304329B (en) | 2023-07-21 |
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| CN1911852A (en) * | 2006-09-05 | 2007-02-14 | 天津大学 | Starch sulphate and its application in concrete |
| CN113773014A (en) * | 2021-08-31 | 2021-12-10 | 中建西部建设北方有限公司 | Gold tailing concrete and preparation method thereof |
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2022
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0455940A1 (en) * | 1990-04-30 | 1991-11-13 | Rödl GmbH | Process for the production of a cement suspension for grouting crevices in stone material |
| CN1911852A (en) * | 2006-09-05 | 2007-02-14 | 天津大学 | Starch sulphate and its application in concrete |
| CN113773014A (en) * | 2021-08-31 | 2021-12-10 | 中建西部建设北方有限公司 | Gold tailing concrete and preparation method thereof |
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