CN110590281A - Concrete suitable for underground engineering - Google Patents
Concrete suitable for underground engineering Download PDFInfo
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- CN110590281A CN110590281A CN201910909412.XA CN201910909412A CN110590281A CN 110590281 A CN110590281 A CN 110590281A CN 201910909412 A CN201910909412 A CN 201910909412A CN 110590281 A CN110590281 A CN 110590281A
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- Prior art keywords
- agent
- concrete
- cement
- coke oven
- underground engineering
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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
-
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses concrete suitable for underground engineering, which consists of the following components: the mortar comprises portland cement, polymer emulsion, a film forming aid, a dispersing agent, silicon dioxide micropowder, a water reducing agent, water, methyl hydroxypropyl cellulose ether, an expanding agent, calcium aluminate cement, an early strength agent, an accelerating agent and aggregate. The concrete is added with calcium aluminate cement and coke oven desulphurization byproducts, so that the strength of the concrete is obviously improved; particularly, under the condition of high temperature, the curing time of the concrete can be obviously shortened, thereby achieving the effect of rapidly improving the strength of the concrete.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to concrete suitable for underground engineering.
Background
Along with economic development, the using amount of concrete is larger and larger, and at present, a plurality of methods for coating materials on the outer surface of the concrete are adopted for protecting the concrete structure, wherein in permeable materials, for example: the material with sodium silicate as main component is coated or injected into the waterproof place and the maintenance place to protect the concrete structure. However, this material has problems such as a high reaction rate in concrete, poor permeability and easy abrasion and breakage of the formed surface film due to the fact that the main body is sodium monosilicate.
With the increasing complexity of concrete structures, the maintenance of concrete is very difficult in some structural forms or special parts of the structures, such as the vertical thin-wall structures of the side walls of concrete basements and the like, and the water content is easily lost, so that the service life of buildings is influenced.
The Chinese invention patent CN104591675A discloses an anticorrosive concrete, which adopts wear-resistant corundum filler particles as wear-resistant components, and uses mineral powder and an antifreezing agent in a matching way, thereby greatly improving the wear resistance and the corrosion resistance, having low cost and convenient use and maintenance, effectively prolonging the service life of buildings and greatly reducing the maintenance cost. However, the strength of the material needs to be enhanced, and the material cannot meet the requirements of partial underground civil air defense engineering, port and wharf and other heavy-duty engineering, so that a high-strength concrete suitable for underground engineering needs to be researched.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides concrete suitable for underground engineering.
The technical scheme of the invention is as follows:
the concrete suitable for underground engineering consists of the following components: the mortar comprises portland cement, polymer emulsion, a film forming aid, a dispersing agent, silicon dioxide micropowder, a water reducing agent, water, methyl hydroxypropyl cellulose ether, an expanding agent, calcium aluminate cement, an early strength agent, an accelerating agent and aggregate.
Preferably, the concrete suitable for underground engineering consists of the following components in percentage by weight: 20-35% of silicate cement, 5-10% of polymer emulsion, 5-8% of film-forming assistant, 3-5% of dispersant, 4-7% of silicon dioxide micropowder, 1-3% of water reducing agent, 12-15% of water, 2-5% of methyl hydroxypropyl cellulose ether, 1-2% of expanding agent, 3-8% of calcium aluminate cement, 1-3% of early strength agent, 1.5-2.5% of accelerator and the balance of aggregate.
Preferably, the portland cement is portland cement with a cement strength grade equal to or higher than 42.5.
Preferably, the polymer emulsion is styrene-acrylic emulsion.
Preferably, the film forming aid is ethylene glycol.
Preferably, the water reducing agent is a naphthalene sulfonate water reducing agent; the early strength agent is calcium formate, and the expanding agent is a ZY type expanding agent.
Preferably, the aggregate is a mixture of fine sand with the particle size of 1-3mm and a coke oven desulphurization byproduct.
More preferably, the weight ratio of the fine sand to the coke oven desulphurization by-product is (12-20): 1.
The coke oven desulphurization byproduct is 160 ℃ coke oven smoke generated in the steelmaking process and adopts carbonic acidThe by-product formed by desulfurizing the sodium slurry mainly comprises the following components: 55-60% of sodium sulfate, 18-22% of sodium carbonate, 6-10% of sodium sulfite, 4-6% of sodium sulfide, 0.5-1.5% of sodium chloride and 8-12% of C, H compound; the density of the product is 0.6-1.2g/cm3。
Conventional calcium aluminate cements are cements with calcium monoaluminate (CA) or calcium dialuminate (CA2) as the main mineral component. The CA2 mineral has increased curing temperature and accelerated setting and hardening speed, while the CA mineral has some abnormal phenomena, which is faster at about 20 ℃, slower at about 30 ℃ and faster at more than 30 ℃. Depending on the phase change during heating of the calcium aluminate hydrate, it is very important to select suitable curing conditions. Since the hydrates formed when calcium aluminate cements are hydrated vary with curing conditions. The coke oven desulphurization by-product is added, and due to the special chemical components of the coke oven desulphurization by-product, the CA mineral can achieve the hydration effect similar to that of the CA2 mineral, namely, the CA mineral is accelerated in setting and hardening speed along with the increase of the curing temperature, so that the influence of high temperature on the strength of concrete is obviously reduced.
The invention has the advantages that: the concrete suitable for underground engineering consists of the following components: the mortar comprises portland cement, polymer emulsion, a film forming aid, a dispersing agent, silicon dioxide micropowder, a water reducing agent, water, methyl hydroxypropyl cellulose ether, an expanding agent, calcium aluminate cement, an early strength agent, an accelerating agent and aggregate. The concrete is added with calcium aluminate cement and coke oven desulphurization byproducts, so that the strength of the concrete is obviously improved; particularly, under the condition of high temperature, the curing time of the concrete can be obviously shortened, thereby achieving the effect of rapidly improving the strength of the concrete.
Detailed Description
Example 1:
the concrete suitable for underground engineering consists of the following components in percentage by weight: 26% of silicate cement, 7% of polymer emulsion, 6% of film-forming assistant, 4% of dispersing agent, 5% of silicon dioxide micropowder, 2% of water reducing agent, 14% of water, 3% of methyl hydroxypropyl cellulose ether, 1.5% of expanding agent, 5% of calcium aluminate cement, 1.5% of early strength agent, 2.2% of accelerating agent and the balance aggregate.
The portland cement is portland cement with a cement strength grade of 42.5.
The polymer emulsion is styrene-acrylic emulsion.
The film-forming assistant is glycol.
The water reducing agent is a naphthalene sulfonate water reducing agent; the early strength agent is calcium formate, and the expanding agent is a ZY type expanding agent.
The aggregate is a mixture of fine sand with the particle size of 1-3mm and a desulphurization byproduct of a coke oven.
The weight ratio of the fine sand to the coke oven desulphurization by-product is 15: 1.
The coke oven desulphurization byproduct is a byproduct generated in a steelmaking process by adopting sodium carbonate slurry desulphurization of coke oven flue gas at 160 ℃, and comprises the following main components: 55-60% of sodium sulfate, 18-22% of sodium carbonate, 6-10% of sodium sulfite, 4-6% of sodium sulfide, 0.5-1.5% of sodium chloride and 8-12% of C, H compound; the density of the product is 0.6-1.2g/cm3。
Example 2:
the concrete suitable for underground engineering consists of the following components in percentage by weight: 35% of silicate cement, 5% of polymer emulsion, 8% of film-forming assistant, 3% of dispersing agent, 7% of silicon dioxide micropowder, 1% of water reducing agent, 15% of water, 2% of methyl hydroxypropyl cellulose ether, 2% of expanding agent, 3% of calcium aluminate cement, 3% of early strength agent, 1.5% of accelerating agent and the balance aggregate.
The portland cement is portland cement with a cement strength grade of 42.5.
The polymer emulsion is styrene-acrylic emulsion.
The film-forming assistant is glycol.
The water reducing agent is a naphthalene sulfonate water reducing agent; the early strength agent is calcium formate, and the expanding agent is a ZY type expanding agent.
The aggregate is a mixture of fine sand with the particle size of 1-3mm and a desulphurization byproduct of a coke oven.
The weight ratio of the fine sand to the coke oven desulphurization by-product is 20: 1.
The coke oven desulfurization byproduct is a steelmaking processThe generated 160 ℃ coke oven smoke is desulfurized by adopting sodium carbonate slurry to form a byproduct, and the main components of the byproduct comprise: 55-60% of sodium sulfate, 18-22% of sodium carbonate, 6-10% of sodium sulfite, 4-6% of sodium sulfide, 0.5-1.5% of sodium chloride and 8-12% of C, H compound; the density of the product is 0.6-1.2g/cm3。
Example 3:
the concrete suitable for underground engineering consists of the following components in percentage by weight: 20% of silicate cement, 10% of polymer emulsion, 5% of film-forming assistant, 5% of dispersing agent, 4% of silicon dioxide micropowder, 3% of water reducing agent, 12% of water, 5% of methyl hydroxypropyl cellulose ether, 1% of expanding agent, 8% of calcium aluminate cement, 1% of early strength agent, 2.5% of accelerating agent and the balance aggregate.
The portland cement is portland cement with a cement strength grade of 52.5.
The polymer emulsion is styrene-acrylic emulsion.
The film-forming assistant is glycol.
The water reducing agent is a naphthalene sulfonate water reducing agent; the early strength agent is calcium formate, and the expanding agent is a ZY type expanding agent.
The aggregate is a mixture of fine sand with the particle size of 1-3mm and a desulphurization byproduct of a coke oven.
The weight ratio of the fine sand to the coke oven desulphurization by-product is 12: 1.
The coke oven desulphurization byproduct is a byproduct generated in a steelmaking process by adopting sodium carbonate slurry desulphurization of coke oven flue gas at 160 ℃, and comprises the following main components: 55-60% of sodium sulfate, 18-22% of sodium carbonate, 6-10% of sodium sulfite, 4-6% of sodium sulfide, 0.5-1.5% of sodium chloride and 8-12% of C, H compound; the density of the product is 0.6-1.2g/cm3。
Comparative example 1
The calcium aluminate cement in example 1 was replaced by 42.5 portland cement, and the rest of the formulation was unchanged.
Comparative example 2
The coke oven desulfurization by-product in example 1 was removed, and the remaining compounding ratio was unchanged.
The following test results were obtained by performing the performance tests on the samples of examples 1 to 3 and comparative examples 1 to 2, and the specific test results are shown in Table 1.
Table 1: performance test results of the samples:
the test data show that the concrete suitable for underground engineering has high strength, good early strength effect and small influence of the environmental temperature.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The concrete suitable for underground engineering is characterized by comprising the following components: the mortar comprises portland cement, polymer emulsion, a film forming aid, a dispersing agent, silicon dioxide micropowder, a water reducing agent, water, methyl hydroxypropyl cellulose ether, an expanding agent, calcium aluminate cement, an early strength agent, an accelerating agent and aggregate.
2. The concrete suitable for underground engineering according to claim 1, which consists of the following components in percentage by weight: 20-35% of silicate cement, 5-10% of polymer emulsion, 5-8% of film-forming assistant, 3-5% of dispersant, 4-7% of silicon dioxide micropowder, 1-3% of water reducing agent, 12-15% of water, 2-5% of methyl hydroxypropyl cellulose ether, 1-2% of expanding agent, 3-8% of calcium aluminate cement, 1-3% of early strength agent, 1.5-2.5% of accelerator and the balance of aggregate.
3. The concrete for use in underground works according to claim 1, wherein the portland cement is a portland cement having a cement strength grade equal to or higher than 42.5.
4. The concrete suitable for use in subterranean engineering according to claim 1, wherein the polymer emulsion is a styrene-acrylic emulsion.
5. The concrete suitable for use in subterranean engineering according to claim 1, wherein the film-forming aid is ethylene glycol.
6. The concrete suitable for underground engineering according to claim 1, wherein the water reducing agent is a naphthalene sulfonate water reducing agent; the early strength agent is calcium formate, and the expanding agent is a ZY type expanding agent.
7. The concrete for underground works according to claim 1, wherein the aggregate is a mixture of fine sand having a particle size of 1 to 3mm and a by-product of coke oven desulfurization.
8. The concrete for underground engineering according to claim 7, wherein the weight ratio of the fine sand to the coke oven desulfurization by-products is (12-20): 1.
9. The concrete suitable for underground engineering according to claim 7 or 8, wherein the coke oven desulphurization by-product is a by-product formed by desulphurization of 160 ℃ coke oven flue gas generated in a steelmaking process by using sodium carbonate slurry, and comprises the following main components: 55-60% of sodium sulfate, 18-22% of sodium carbonate, 6-10% of sodium sulfite, 4-6% of sodium sulfide, 0.5-1.5% of sodium chloride and 8-12% of C, H compound; the density is 0.6-1.2 g/cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910909412.XA CN110590281A (en) | 2019-09-25 | 2019-09-25 | Concrete suitable for underground engineering |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910909412.XA CN110590281A (en) | 2019-09-25 | 2019-09-25 | Concrete suitable for underground engineering |
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| CN110590281A true CN110590281A (en) | 2019-12-20 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101269184B1 (en) * | 2012-06-13 | 2013-05-30 | 김흠 | The composition of the alkanolamin additive use concrete reinforcement material |
| CN104591675A (en) * | 2015-01-27 | 2015-05-06 | 金陵科技学院 | Anti-corrosion concrete |
| CN105174864A (en) * | 2015-08-21 | 2015-12-23 | 大连市建筑科学研究设计院股份有限公司 | Weatherability polymer emulsion cement mortar and preparation method thereof |
| CN106699072A (en) * | 2015-11-12 | 2017-05-24 | 上海东大化学有限公司 | Cement-based self-leveling mortar and preparation method thereof |
| CN107010909A (en) * | 2017-05-24 | 2017-08-04 | 山东英才学院 | A kind of Self-leveling II type Polymer cement materials |
| CN108996940A (en) * | 2018-08-24 | 2018-12-14 | 上海市建筑科学研究院 | A kind of high-intensitive admixture for prefabricated concrete members |
-
2019
- 2019-09-25 CN CN201910909412.XA patent/CN110590281A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101269184B1 (en) * | 2012-06-13 | 2013-05-30 | 김흠 | The composition of the alkanolamin additive use concrete reinforcement material |
| CN104591675A (en) * | 2015-01-27 | 2015-05-06 | 金陵科技学院 | Anti-corrosion concrete |
| CN105174864A (en) * | 2015-08-21 | 2015-12-23 | 大连市建筑科学研究设计院股份有限公司 | Weatherability polymer emulsion cement mortar and preparation method thereof |
| CN106699072A (en) * | 2015-11-12 | 2017-05-24 | 上海东大化学有限公司 | Cement-based self-leveling mortar and preparation method thereof |
| CN107010909A (en) * | 2017-05-24 | 2017-08-04 | 山东英才学院 | A kind of Self-leveling II type Polymer cement materials |
| CN108996940A (en) * | 2018-08-24 | 2018-12-14 | 上海市建筑科学研究院 | A kind of high-intensitive admixture for prefabricated concrete members |
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Application publication date: 20191220 |