CN112062520A - Antifreezing concrete composition and preparation method thereof - Google Patents
Antifreezing concrete composition and preparation method thereof Download PDFInfo
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- CN112062520A CN112062520A CN202010934047.0A CN202010934047A CN112062520A CN 112062520 A CN112062520 A CN 112062520A CN 202010934047 A CN202010934047 A CN 202010934047A CN 112062520 A CN112062520 A CN 112062520A
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- concrete
- frost
- cement
- concrete composition
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a frost-resistant concrete composition and a preparation method thereof, wherein the frost-resistant concrete composition is prepared from the following raw materials in parts by weight: 150-175kg/m3 of water, 310-330kg/m3 of cement, 30-40kg/m3 of mineral powder, 25-35kg/m3 of fly ash, 700-745kg/m3 of sand, 1000-1100kg/m3 of stone, 9-12kg/m3 of additive and 28-39kg/m3 of expanding agent. The invention adopts proper aggregate and excellent proportion, and is matched with reasonable construction process, so that the concrete has the advantages of high strength, frost resistance and impermeability after being poured, can prevent the cracks of mass concrete such as ship locks, dams and the like, and is beneficial to improving the durability and bearing capacity of concrete members, thereby prolonging the service life.
Description
Technical Field
The invention relates to the technical field of concrete compositions, in particular to an antifreezing concrete composition and a preparation method thereof.
Background
The concrete is cement concrete, also called common concrete, which is prepared by mixing cement as cementing material, sand and stone as aggregate, with water in a certain proportion and stirring, and has the advantages of easy forming, low energy consumption, good durability, low price and capability of being made into various bearing mechanisms by combining with steel, thus being the most widely used building material in the present generation and playing an important role in the development of human society.
With the progress of science and technology and the development of society, the concrete technology is applied more and more in the severe cold environment, so the durability of the concrete engineering under the low-temperature severe cold condition becomes a great concern. In cold areas in the north of China, the temperature in winter is very low and often reaches twenty degrees centigrade below zero, even twenty degrees centigrade below zero and fifty degrees centigrade below four. Under the condition of low temperature, the freeze-thaw damage of concrete is a concrete damage form under the combined action of water and freeze-thaw cycles, which is mainly represented by internal microcracks and surface denudation, and after the freeze damage is accumulated for many times, concrete structures are finally expanded, cracked, denudated and dispersed, so that the durability of the concrete structures is reduced, and the engineering safety is also seriously influenced. Therefore, the improvement of the durability and the use safety of the concrete under the severe cold condition has very important significance.
Disclosure of Invention
According to the technical problems, the invention provides a frost-resistant concrete composition and a preparation method thereof, wherein the frost-resistant concrete composition is prepared from the following raw materials in parts by weight: 150-175kg/m3 of water, 310-330kg/m3 of cement, 30-40kg/m3 of mineral powder, 25-35kg/m3 of fly ash, 700-745kg/m3 of sand, 1000-1100kg/m3 of stone, 9-12kg/m3 of additive and 28-39kg/m3 of expanding agent.
The cement is portland cement.
The cement is ordinary portland cement.
The admixture is a 31-gas admixture.
The sand, the cement, the mineral powder and the fly ash are fine aggregates.
The stones are coarse aggregates.
The content of the fine aggregate is not more than 3 percent, the content of the mud blocks is not more than 0.5 percent, and the specification is 5-25 mm.
The maximum water-gel ratio and the minimum amount of the cementing material meet the requirements of the minimum amount of the cementing material of 320kg/m3 on 0.5 of the market without the air entraining agent and 0.55 when the air entraining agent is blended.
The mixing amount of the mineral admixture is preferably 35 percent of the maximum mixing amount of the fly ash, the water-to-gel ratio is less than or equal to 0.4 when the ordinary portland cement is adopted, the maximum mixing amount of the granulated blast furnace slag powder is 55 percent, and the water-to-gel ratio is less than or equal to 0.4 when the ordinary portland cement is adopted.
The minimum air content of the concrete doped with the air entraining agent meets the specification of 5 percent of the minimum air content of the concrete with the maximum particle size of the coarse aggregate of 25 mm.
The antifreezing agent containing chloride salt is not added in the reinforced concrete and the prestressed concrete, and the antifreezing agent containing nitrite or carbonate is not added in the prestressed concrete.
The coarse aggregate and the fine aggregate should be subjected to a firmness test and should meet the specification of JGJ52 Standard for quality and test method of Sand and Stone for general concrete.
The antifreeze concrete composition is characterized by comprising the following specific processing technologies:
s1, putting the cement, the mineral powder, the fly ash, the sand, the pebbles, the additive and the water into a stirrer in parts by weight, and stirring to obtain a mixture;
s2, pouring the mixture into a steel die by using a slide carriage, vibrating for compacting during the pouring process, wherein the vibrating time is uniform, the surface is preferably starched, the distance is uniform, the vibrating force wave and the range are preferably overlapped by one half, and after the pouring is finished, the surface is compacted and leveled to prevent surface cracks;
s3 wrapping the quilt outside the steel mould by using plastic color strip cloth;
s4, under the condition of actual temperature curing, the strength of the concrete reaches over 75% of the designed strength, the lowest temperature of the center and the surface of the concrete is controlled within 25 ℃, and the surface temperature drop of the concrete after the form removal is predicted to be not more than 9 ℃ and the form removal is allowed;
and S5, after the concrete is poured, timely watering and curing are needed, and the surface of the concrete is kept wet frequently.
The invention has the beneficial effects that: the invention adopts proper aggregate and excellent proportion, and is matched with reasonable construction process, so that the concrete has the advantages of high strength, frost resistance and impermeability after being poured, can prevent the cracks of mass concrete such as ship locks, dams and the like, and is beneficial to improving the durability and bearing capacity of concrete members, thereby prolonging the service life.
Detailed Description
Example 1
The invention provides a frost-resistant concrete composition and a preparation method thereof, wherein the frost-resistant concrete composition is prepared from the following raw materials in parts by weight: 150-175kg/m3 of water, 310-330kg/m3 of cement, 30-40kg/m3 of mineral powder, 25-35kg/m3 of fly ash, 700-745kg/m3 of sand, 1000-1100kg/m3 of stone, 9-12kg/m3 of additive and 28-39kg/m3 of expanding agent. The cement is portland cement. The cement is ordinary portland cement. The admixture is a 31-gas admixture. The sand, the cement, the mineral powder and the fly ash are fine aggregates. The stones are coarse aggregates. The content of the fine aggregate is not more than 3 percent, the content of the mud blocks is not more than 0.5 percent, and the specification is 5-25 mm.
Example 2
The concrete processing operations of the antifreeze concrete composition are as follows:
s1, putting 165kg/m of water 3, 321kg/m of cement 3, 38kg/m of mineral powder 3, 27kg/m of fly ash 3, 738kg/m of sand 3, 1052kg/m of pebbles 3, 10.08kg/m of additive 3 and 34kg/m of expanding agent 3 in parts by weight into a stirrer, and stirring to obtain a mixture;
s2, pouring the mixture into a steel die by using a slide carriage, vibrating for compacting during the pouring process, wherein the vibrating time is uniform, the surface is preferably starched, the distance is uniform, the vibrating force wave and the range are preferably overlapped by one half, and after the pouring is finished, the surface is compacted and leveled to prevent surface cracks;
s3 wrapping the quilt outside the steel mould by using plastic color strip cloth;
s4, under the condition of actual temperature curing, the strength of the concrete reaches over 75% of the designed strength, the lowest temperature of the center and the surface of the concrete is controlled within 25 ℃, and the surface temperature drop of the concrete after the form removal is predicted to be not more than 9 ℃ and the form removal is allowed;
and S5, after the concrete is poured, timely watering and curing are needed, and the surface of the concrete is kept wet frequently.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. While the invention has been described with respect to the above embodiments, it will be understood by those skilled in the art that the invention is not limited to the above embodiments, which are described in the specification and illustrated only to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The antifreeze concrete composition is characterized by comprising the following raw materials in parts by weight: 150-175kg/m3 of water, 310-330kg/m3 of cement, 30-40kg/m3 of mineral powder, 25-35kg/m3 of fly ash, 700-745kg/m3 of sand, 1000-1100kg/m3 of stone, 9-12kg/m3 of additive and 28-39kg/m3 of expanding agent.
2. A frost-resistant concrete composition according to claim 1, characterized in that said cement is portland cement.
3. A frost-resistant concrete composition according to claim 1, characterized in that said cement is ordinary portland cement.
4. A frost resistant concrete composition according to claim 1, wherein said admixture is a 31-gas admixture.
5. Frost concrete composition according to claim 1, wherein the sand, cement, mineral powder, fly ash is a fine aggregate.
6. A frost-resistant concrete composition according to claim 1, characterized in that said stones are coarse aggregates.
7. Frost concrete composition according to claim 5, wherein the fine aggregate has a content of sludge of not more than 3%, a content of sludge lumps of not more than 0.5% and a size of 5-25 mm.
8. Frost concrete composition according to claim 1, characterized in that the concrete processing is as follows:
s1, putting the cement, the mineral powder, the fly ash, the sand, the pebbles, the additive and the water into a stirrer in parts by weight, and stirring to obtain a mixture;
s2, pouring the mixture into a steel die by using a slide carriage, vibrating for compacting during the pouring process, wherein the vibrating time is uniform, the surface is preferably starched, the distance is uniform, the vibrating force wave and the range are preferably overlapped by one half, and after the pouring is finished, the surface is compacted and leveled to prevent surface cracks;
s3 wrapping the quilt outside the steel mould by using plastic color strip cloth;
s4, under the condition of actual temperature curing, the strength of the concrete reaches over 75% of the designed strength, the lowest temperature of the center and the surface of the concrete is controlled within 25 ℃, and the surface temperature drop of the concrete after the form removal is predicted to be not more than 9 ℃ and the form removal is allowed;
and S5, after the concrete is poured, timely watering and curing are needed, and the surface of the concrete is kept wet frequently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010934047.0A CN112062520A (en) | 2020-09-08 | 2020-09-08 | Antifreezing concrete composition and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010934047.0A CN112062520A (en) | 2020-09-08 | 2020-09-08 | Antifreezing concrete composition and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112062520A true CN112062520A (en) | 2020-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010934047.0A Pending CN112062520A (en) | 2020-09-08 | 2020-09-08 | Antifreezing concrete composition and preparation method thereof |
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| Country | Link |
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| CN (1) | CN112062520A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114804769A (en) * | 2022-05-05 | 2022-07-29 | 中国建筑材料科学研究总院有限公司 | Non-reinforcement prestressed concrete and forming method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106830835A (en) * | 2017-02-09 | 2017-06-13 | 天津港航工程有限公司 | Using the frost-resistant concrete of steam curing process |
| CN111018436A (en) * | 2019-11-29 | 2020-04-17 | 南通万洋混凝土有限公司 | High-strength anti-permeability anti-freezing concrete and processing technology thereof |
| CN111548081A (en) * | 2020-03-31 | 2020-08-18 | 桐乡市众磊混凝土股份有限公司 | High-strength concrete and construction process thereof |
-
2020
- 2020-09-08 CN CN202010934047.0A patent/CN112062520A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106830835A (en) * | 2017-02-09 | 2017-06-13 | 天津港航工程有限公司 | Using the frost-resistant concrete of steam curing process |
| CN111018436A (en) * | 2019-11-29 | 2020-04-17 | 南通万洋混凝土有限公司 | High-strength anti-permeability anti-freezing concrete and processing technology thereof |
| CN111548081A (en) * | 2020-03-31 | 2020-08-18 | 桐乡市众磊混凝土股份有限公司 | High-strength concrete and construction process thereof |
Non-Patent Citations (1)
| Title |
|---|
| 赵丽颖等主编: "《建筑材料与检测》", 31 August 2016, 北京理工大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114804769A (en) * | 2022-05-05 | 2022-07-29 | 中国建筑材料科学研究总院有限公司 | Non-reinforcement prestressed concrete and forming method thereof |
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Application publication date: 20201211 |
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