CN108358531B - Roller compacted concrete for hydraulic engineering and preparation method thereof - Google Patents
Roller compacted concrete for hydraulic engineering and preparation method thereof Download PDFInfo
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- CN108358531B CN108358531B CN201810448437.XA CN201810448437A CN108358531B CN 108358531 B CN108358531 B CN 108358531B CN 201810448437 A CN201810448437 A CN 201810448437A CN 108358531 B CN108358531 B CN 108358531B
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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
- 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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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention discloses roller compacted concrete for hydraulic engineering, which is prepared from the following raw materials in parts by weight: 10-20 parts of modified tailing iron ore powder, 15-25 parts of slag, 20-30 parts of modified sodium alginate powder, 5-10 parts of steel slag, 40-50 parts of cement and 4-8 parts of water reducing agent, and the invention also discloses a preparation method of the modified tailing iron ore powder, which comprises the following steps: (1) preparing modified iron tailing powder; (2) preparing modified sodium alginate powder; (3) and mixing. According to the invention, on the basis of adding steel slag into the existing raw materials to prepare the roller compacted concrete, the modified tailing iron powder and the modified sodium alginate powder are added, so that the phenomenon that the prepared roller compacted concrete has cracks is avoided, the rolling strength of the roller compacted concrete is ensured, the actual requirements of the hydraulic engineering are met, and the preparation process of the Rogoya is simple, can be operated in batches and has high reliability.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to roller compacted concrete for hydraulic engineering and a preparation method thereof.
Background
Hydraulic engineering is an engineering built for controlling and allocating surface water and underground water in nature to achieve the purposes of removing harmful substances and benefiting. Also known as water engineering. Water is a valuable resource essential for human production and life, but its naturally occurring state does not completely meet the needs of human beings. Only when hydraulic engineering is built, water flow can be controlled, flood disasters are prevented, and water quantity is adjusted and distributed to meet the requirements of people on water resources in life and production. Hydraulic engineering needs to build various types of hydraulic buildings such as dams, dikes, spillways, water gates, water inlets, channels, transition troughs, rafts, fishways and the like so as to achieve the aims.
In hydraulic engineering, various concretes are used, wherein the number of the concrete is more, and the roller compacted concrete is lean cement concrete which achieves high compactness and high strength through a vibration roller compaction construction process. Compared with common concrete, the roller compacted concrete obtains strength by virtue of interlocking action among coarse aggregates, has the advantages of small water consumption, low consistency, capability of saving a large amount of cement, high construction speed and short maintenance time, and is mainly used for road pavement engineering, hydraulic dam body engineering and the like.
However, in order to increase the strength of the existing roller compacted concrete, steel slag is added in the raw materials, and the steel slag has high thermal expansion and cold contraction performance, so that the prepared concrete can generate large cracks when the steel slag is actually mixed in the raw materials, and the service performance is seriously influenced.
Disclosure of Invention
The invention aims to provide roller compacted concrete for hydraulic engineering and a preparation method thereof, and aims to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the roller compacted concrete for the hydraulic engineering is prepared from the following raw materials in parts by weight: 10-20 parts of modified tailing iron ore powder, 15-25 parts of slag, 20-30 parts of modified sodium alginate powder, 5-10 parts of steel slag, 40-50 parts of cement and 4-8 parts of a water reducing agent.
As a further scheme of the invention: the concrete is prepared from the following raw materials in parts by weight: 12-18 parts of modified tailing iron ore powder, 18-23 parts of slag, 22-28 parts of modified sodium alginate powder, 6-9 parts of steel slag, 42-48 parts of cement and 5-7 parts of a water reducing agent.
As a further scheme of the invention: the concrete is prepared from the following raw materials in parts by weight: 15 parts of modified tailing iron powder, 20 parts of slag, 25 parts of modified sodium alginate powder, 7.5 parts of steel slag, 45 parts of cement and 6 parts of a water reducing agent.
As a further scheme of the invention: the water reducing agent is prepared by mixing sodium aminobenzenesulfonate, sodium hydroxide, melamine and phenol.
A preparation method of roller compacted concrete for hydraulic engineering comprises the following steps:
(1) and preparing modified iron tailing powder: screening fine-particle tailings with the particle size of below 0.04mm from the iron tailings by using a ceramic filter, mixing and stirring the iron tailings and a curing agent by using a stirrer according to the proportion of 5:1 to fully mix the iron tailings and the curing agent, then placing the stirred raw materials for 28-35 days to carry out natural reaction and aging treatment, then drying the modified and cured raw materials, crushing the raw materials by using a crusher, then preparing powder by using a pulverizer, screening to obtain micro powder with the particle size of-200 meshes, and then adding 20% of bentonite to obtain modified tailing iron ore powder;
(2) and preparing modified sodium alginate powder: preparing water-soluble sodium alginate into a uniform aqueous solution with the mass fraction of 50-60%, dropwise adding the sodium alginate solution into an inorganic calcium salt aqueous solution at the speed of 80-100 mL/min, reacting for 5-6 h to obtain a sodium alginate hydrogel, putting the sodium alginate hydrogel into a phosphate aqueous solution to obtain a mixed solution, adjusting the pH of the mixed solution to 9-10, aging for 6-7 days, washing with water, filtering, and drying to obtain modified sodium alginate powder;
(3) and mixing: respectively crushing the slag and the steel slag, mixing the crushed slag and the steel slag with cement, adding deionized water into the mixture for fully stirring, emulsifying and dispersing the mixture through ultrasonic waves in the stirring process, and sequentially adding modified tailing iron powder, modified sodium alginate powder and a water reducing agent to prepare the roller compacted concrete.
As a further scheme of the invention: in the step (3), the ultrasonic dispersion sound emulsification dispersion time is 2-3h, the ultrasonic emulsification dispersion frequency is 15-18KHz, and the ultrasonic emulsification dispersion power is 800-1000W.
As a still further scheme of the invention: the curing agent is one or a mixture of more than two of ammonium bicarbonate, alkali lignin and sodium lignosulphonate.
Compared with the prior art, the invention has the beneficial effects that:
the roller compacted concrete for hydraulic engineering is characterized in that on the basis of adding steel slag into the existing raw materials to prepare the roller compacted concrete, modified tailing iron powder and modified sodium alginate powder are added, so that the phenomenon that cracks appear in the prepared roller compacted concrete is avoided, the rolling strength of the roller compacted concrete is ensured, the actual needs of hydraulic engineering are met, the preparation process of the wool and the brother is simple, batch operation can be realized, and the reliability is high.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to roller compacted concrete for hydraulic engineering, which is prepared from the following raw materials: the water reducing agent is prepared by mixing sodium aminobenzenesulfonate, sodium hydroxide, melamine and phenol.
Example 1
In embodiment 1 of the invention, the roller compacted concrete for hydraulic engineering is prepared from the following raw materials in parts by weight: 10 parts of modified tailing iron powder, 15 parts of slag, 20 parts of modified sodium alginate powder, 5 parts of steel slag, 40 parts of cement and 4 parts of a water reducing agent.
The preparation method of the roller compacted concrete comprises the following steps:
(1) and preparing modified iron tailing powder: screening fine-particle tailings with the particle size of below 0.04mm from iron tailings by using a ceramic filter, mixing and stirring the iron tailings and a curing agent by using a stirrer according to the proportion of 5:1, wherein the curing agent is one or a mixture of more than two of ammonium bicarbonate, alkali lignin and sodium lignosulfonate, so that the iron tailings and the curing agent are fully mixed, then placing the stirred raw materials for natural reaction and aging treatment, drying the modified and cured raw materials, crushing the raw materials by using a crusher, then pulverizing the crushed raw materials by using a pulverizer, screening the powder to obtain micro powder with the particle size of-200 meshes, and then adding 20% of bentonite to obtain modified tailing iron ore powder;
(2) and preparing modified sodium alginate powder: preparing water-soluble sodium alginate into a uniform aqueous solution with the mass fraction of 50%, dropwise adding the sodium alginate solution into an inorganic calcium salt aqueous solution at the speed of 80mL/min, reacting for 5 hours to obtain sodium alginate hydrogel, then putting the sodium alginate hydrogel into a phosphate aqueous solution to obtain a mixed solution, adjusting the pH of the mixed solution to 9, aging for 6 days, washing with water, filtering, and drying to obtain modified sodium alginate powder;
(3) and mixing: respectively crushing the slag and the steel slag, then mixing the slag and the cement, adding deionized water for fully stirring, carrying out emulsification dispersion by ultrasonic waves in the stirring process, wherein the ultrasonic dispersion sound emulsification dispersion time is 2h, the ultrasonic emulsification dispersion frequency is 15KHz, the ultrasonic emulsification dispersion power is 800W, and adding modified tailing iron powder, modified sodium alginate powder and a water reducing agent in sequence to prepare the roller compacted concrete.
Example 2
In embodiment 2 of the invention, the roller compacted concrete for hydraulic engineering is prepared from the following raw materials in parts by weight: 20 parts of modified tailing iron powder, 25 parts of slag, 30 parts of modified sodium alginate powder, 10 parts of steel slag, 50 parts of cement and 8 parts of a water reducing agent.
The preparation method of the roller compacted concrete comprises the following steps:
(1) and preparing modified iron tailing powder: screening fine-particle tailings with the particle size of below 0.04mm from iron tailings by using a ceramic filter, mixing and stirring the iron tailings and a curing agent by using a stirrer according to the proportion of 5:1, wherein the curing agent is one or a mixture of more than two of ammonium bicarbonate, alkali lignin and sodium lignosulfonate, so that the iron tailings and the curing agent are fully mixed, then placing the stirred raw materials for natural reaction and aging treatment, drying the modified and cured raw materials, crushing the raw materials by using a crusher, then pulverizing the crushed raw materials by using a pulverizer, screening the powder to obtain micro powder with the particle size of-200 meshes, and then adding 20% of bentonite to obtain modified tailing iron ore powder;
(2) and preparing modified sodium alginate powder: preparing a uniform water solution with the mass fraction of 60% by using water-soluble sodium alginate, dropwise adding the water solution of the sodium alginate into an inorganic calcium salt water solution at the speed of 100mL/min, reacting for 5-6 h to obtain a sodium alginate hydrogel, then putting the sodium alginate hydrogel into a phosphate water solution to obtain a mixed solution, adjusting the pH value of the mixed solution to 10, aging for 7 days, washing with water, filtering and drying to obtain modified sodium alginate powder;
(3) and mixing: respectively crushing the slag and the steel slag, then mixing the slag and the cement, adding deionized water for fully stirring, carrying out emulsification dispersion by ultrasonic waves in the stirring process, wherein the ultrasonic dispersion sound emulsification dispersion time is 3h, the ultrasonic emulsification dispersion frequency is 18KHz, the ultrasonic emulsification dispersion power is 1000W, and adding modified tailing iron powder, modified sodium alginate powder and a water reducing agent in sequence to prepare the roller compacted concrete.
Example 3
In embodiment 3 of the invention, the roller compacted concrete for hydraulic engineering is prepared from the following raw materials in parts by weight: 12 parts of modified tailing iron powder, 18 parts of slag, 22 parts of modified sodium alginate powder, 6 parts of steel slag, 42 parts of cement and 5 parts of a water reducing agent.
The preparation method of the roller compacted concrete comprises the following steps:
(1) and preparing modified iron tailing powder: screening fine-particle tailings with the particle size of below 0.04mm from iron tailings by using a ceramic filter, mixing and stirring the iron tailings and a curing agent by using a stirrer according to the proportion of 5:1, wherein the curing agent is one or a mixture of more than two of ammonium bicarbonate, alkali lignin and sodium lignosulfonate, so that the iron tailings and the curing agent are fully mixed, then placing the stirred raw materials for natural reaction and aging treatment, drying the modified and cured raw materials, crushing the raw materials by using a crusher, then pulverizing the crushed raw materials by using a pulverizer, screening the powder to obtain micro powder with the particle size of-200 meshes, and then adding 20% of bentonite to obtain modified tailing iron ore powder;
(2) and preparing modified sodium alginate powder: preparing water-soluble sodium alginate into a uniform aqueous solution with the mass fraction of 55%, dropwise adding the sodium alginate solution into an inorganic calcium salt aqueous solution at the speed of 90mL/min, reacting for 5.5 hours to obtain a sodium alginate hydrogel, then putting the sodium alginate hydrogel into a phosphate aqueous solution to obtain a mixed solution, adjusting the pH of the mixed solution to 9.5, aging for 6.5 days, washing with water, filtering, and drying to obtain modified sodium alginate powder;
(3) and mixing: respectively crushing the slag and the steel slag, then mixing the slag and the cement, adding deionized water into the mixture to fully stir, emulsifying and dispersing the mixture by ultrasonic waves in the stirring process, wherein the ultrasonic dispersion sound emulsification and dispersion time is 2.5h, the ultrasonic emulsification and dispersion frequency is 16.5KHz, the ultrasonic emulsification and dispersion power is 900W, and adding modified tailing powder, modified sodium alginate powder and a water reducing agent in sequence to prepare the roller compacted concrete.
Example 4
In this embodiment 4, a roller compacted concrete for hydraulic engineering, the concrete is prepared from the following raw materials in parts by weight: 18 parts of modified tailing iron powder, 23 parts of slag, 28 parts of modified sodium alginate powder, 9 parts of steel slag, 48 parts of cement and 7 parts of a water reducing agent.
The preparation method of the roller compacted concrete is the same as that of the example 3.
Example 5
In this embodiment 5, a roller compacted concrete for hydraulic engineering, the concrete is prepared from the following raw materials in parts by weight: 15 parts of modified tailing iron powder, 20 parts of slag, 25 parts of modified sodium alginate powder, 7.5 parts of steel slag, 45 parts of cement and 6 parts of a water reducing agent.
Comparative example 1
The raw materials and the preparation method are the same as those of the example 5 except that the modified iron tailings powder is not contained in the raw materials.
Comparative example 2
The raw materials and the preparation method are the same as those in example 5 except that the modified sodium alginate powder is not contained in the raw materials.
Comparative example 3
The raw materials and the preparation method are the same as those of the example 5 except that the modified iron tailings powder and the modified sodium alginate powder are not contained in the raw materials.
Performance test
The concrete prepared in examples 1 to 5 and comparative examples 1 to 3 was subjected to construction specifications, the concrete was constructed in a three-dimensional frame having a size of 50 x 50 to obtain three-dimensional test pieces, and then flexural strength and flexural modulus of the obtained 8 test pieces were measured to obtain the following tables:
according to the invention, under the combined action of the components, particularly the existence of the modified glass fiber and the modified bamboo activated carbon powder, the flexural strength and the flexural elasticity of the roller compacted concrete prepared by the invention are superior to those of common steel slag roller compacted concrete, namely the roller compacted concrete without the raw materials of the modified tailings powder and the modified sodium alginate powder.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (2)
1. The roller compacted concrete for the hydraulic engineering is characterized by being prepared from the following raw materials in parts by weight: 15 parts of modified tailing iron ore powder, 20 parts of slag, 25 parts of modified sodium alginate powder, 7.5 parts of steel slag, 45 parts of cement and 6 parts of a water reducing agent;
the preparation method of the roller compacted concrete comprises the following steps:
(1) preparation of modified iron tailings powder: screening fine-particle tailings with the particle size of below 0.04mm from iron tailings by using a ceramic filter, mixing and stirring the iron tailings and a curing agent by using a stirrer according to the proportion of 5:1, wherein the curing agent is one or a mixture of more than two of ammonium bicarbonate, alkali lignin and sodium lignosulfonate, so that the iron tailings and the curing agent are fully mixed, then placing the stirred raw materials for natural reaction and aging treatment, drying the modified and cured raw materials, crushing the raw materials by using a crusher, then pulverizing the crushed raw materials by using a pulverizer, screening the powder to obtain micro powder with the particle size of-200 meshes, and then adding 20% of bentonite to obtain modified tailing iron ore powder;
(2) preparing modified sodium alginate powder: preparing water-soluble sodium alginate into a uniform aqueous solution with the mass fraction of 55%, dropwise adding the sodium alginate solution into an inorganic calcium salt aqueous solution at the speed of 90mL/min, reacting for 5.5 hours to obtain a sodium alginate hydrogel, then putting the sodium alginate hydrogel into a phosphate aqueous solution to obtain a mixed solution, adjusting the pH of the mixed solution to 9.5, aging for 6.5 days, washing with water, filtering, and drying to obtain modified sodium alginate powder;
(3) mixing: respectively crushing the slag and the steel slag, then mixing the slag and the cement, adding deionized water into the mixture to fully stir, emulsifying and dispersing the mixture by ultrasonic waves in the stirring process, wherein the ultrasonic dispersion sound emulsification and dispersion time is 2.5h, the ultrasonic emulsification and dispersion frequency is 16.5KHz, the ultrasonic emulsification and dispersion power is 900W, and adding modified tailing powder, modified sodium alginate powder and a water reducing agent in sequence to prepare the roller compacted concrete.
2. The roller compacted concrete for hydraulic engineering according to claim 1, wherein the water reducing agent is prepared by mixing sodium aminobenzenesulfonate, sodium hydroxide, melamine and phenol.
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| CN111170765B (en) * | 2020-01-07 | 2021-12-31 | 北京建中新材科技有限公司 | Multi-component concrete surface reinforcing agent and reinforcing method thereof |
| CN114804779B (en) * | 2022-05-24 | 2023-01-31 | 四川水发建设有限公司 | Impervious concrete and preparation method thereof |
| CN114907042B (en) * | 2022-05-26 | 2023-04-04 | 福建工程学院 | Photocatalytic steel slag floating concrete and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100701063B1 (en) * | 2006-10-18 | 2007-03-29 | 주식회사 유로엔지니어링플러스 | Water permeable concrete composition of a granule and construction method using the same |
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| CN101215126B (en) * | 2007-01-05 | 2011-10-19 | 上海宝钢冶金技术服务有限公司 | Steel slag roller compacted concrete |
| CN102517443A (en) * | 2011-12-20 | 2012-06-27 | 镇江韦岗铁矿有限公司 | Method for preparing pellet binder by using fine-graded iron tailings |
| CN103690994B (en) * | 2013-12-13 | 2015-05-27 | 苏州大学 | Alginate/hydroxyapatite hydrogel material and preparation method thereof |
| CN104529322A (en) * | 2014-12-09 | 2015-04-22 | 鞍钢集团矿业公司 | Iron tailings roller compacted concrete for pavement |
| CN105000856B (en) * | 2015-07-21 | 2016-09-07 | 山东宏艺科技股份有限公司 | A kind of maritime concrete Binder Materials |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100701063B1 (en) * | 2006-10-18 | 2007-03-29 | 주식회사 유로엔지니어링플러스 | Water permeable concrete composition of a granule and construction method using the same |
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