CN113087476A - Alkali-activated slag concrete containing natural zeolite powder and preparation method thereof - Google Patents
Alkali-activated slag concrete containing natural zeolite powder and preparation method thereof Download PDFInfo
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- CN113087476A CN113087476A CN202110344862.6A CN202110344862A CN113087476A CN 113087476 A CN113087476 A CN 113087476A CN 202110344862 A CN202110344862 A CN 202110344862A CN 113087476 A CN113087476 A CN 113087476A
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- zeolite powder
- natural zeolite
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- alkali
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Classifications
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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
- C04B28/10—Lime cements or magnesium oxide cements
- C04B28/105—Magnesium oxide or magnesium carbonate 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
- 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
-
- 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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
-
- 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
- C04B2111/40—Porous or lightweight materials
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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 relates to the technical field of concrete preparation, in particular to alkali-activated slag concrete containing natural zeolite powder, which comprises the following components in percentage by mass, 54-81 parts of light sand; 30-56 parts of lightweight aggregate; 38-60 parts of slag; 9-14 parts of natural zeolite powder; 5.7-9 parts of magnesium oxide powder; 0.5-2 parts of a water reducing agent; and 18-28 parts of water. S1, adding light sand, light aggregate, slag, magnesium oxide powder and natural zeolite powder into a stirrer, and starting the stirrer to obtain a mixture; s2, adding water and a water reducing agent into the mixture, and continuing to stir for a period of time to obtain the alkali-activated slag concrete containing the natural zeolite powder. The concrete provided by the invention can effectively improve the heat resistance of the traditional concrete, increase the cohesiveness of the concrete, improve the corrosion resistance of the concrete, reduce the time loss of the concrete, simultaneously ensure the good pumpability of the concrete, improve the production efficiency, effectively reduce the self weight of the structure and ensure the safety of the structure.
Description
Technical Field
The invention relates to the technical field of concrete preparation, in particular to alkali-activated slag concrete containing natural zeolite powder and a preparation method thereof.
Background
The lightweight aggregate concrete has strict requirements on raw materials, mixing proportion and a stirring process, the stability of the working performance of the lightweight aggregate concrete is difficult to guarantee, and particularly, the lightweight aggregate concrete is easy to generate the phenomena of floating of the lightweight aggregate, serious separation of slurry bones, large time loss and the like under the condition of guaranteeing the volume weight of the concrete. Under the same mixing proportion, a proper amount of natural zeolite powder and the like are added, and the stirring process of the concrete is properly changed, so that the working performance of the concrete can be effectively improved, the strength of the concrete is improved, and various technical requirements are met. With the explosion of the construction market, the cement production has been increasing. Limestone is consumed in large quantities as a main production raw material of ordinary portland cement. If the existing production scale of portland cement is maintained, the storage amount of limestone in China can be used after less than 50 years. Moreover, the cement clinker needs to be prepared by high-temperature calcination at 1450 ℃, which consumes a large amount of energy, the production of 1 ton of portland cement consumes 185-243kg of standard coal, a large amount of harmful gases such as NO, SO2 and CO2 greenhouse gases are emitted in the processes of fuel combustion and limestone decomposition, and a large amount of dust is emitted in the processes of raw meal grinding and cement preparation, and the harmful gases and the dust seriously pollute the environment for human life.
The concrete aims to effectively improve the working performance of the concrete, improve the strength of the concrete, meet various technical requirements, fully utilize industrial waste residues, reduce the exploitation of natural resources, protect the environment and reduce the energy consumption. We propose an alkali-activated slag concrete containing natural zeolite powder and a preparation method thereof.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides alkali-activated slag concrete containing natural zeolite powder and a preparation method thereof.
The alkali-activated slag concrete containing the natural zeolite powder comprises the following components in percentage by mass:
54-81 parts of light sand;
30-56 parts of lightweight aggregate;
38-60 parts of slag;
5.7-9 parts of magnesium oxide powder;
9-14 parts of natural zeolite powder;
0.5-2 parts of a water reducing agent;
and 18-28 parts of water.
Preferably, the light sand is waste glass slag, and the particle size of the light sand is 16-20 meshes.
Preferably, the lightweight aggregate is one or more of pumice, scoria and fly ash ceramsite, and the particle size of the lightweight aggregate is 40-60 meshes.
Preferably, the water reducing agent is one of a polycarboxylic acid water reducing agent or a naphthalene water reducing agent.
A preparation method of alkali-activated slag concrete containing natural zeolite powder comprises the following steps:
s1, adding the light sand, the light aggregate, the slag, the magnesium oxide powder and the natural zeolite powder into a stirrer, and starting the stirrer to obtain a mixture;
s2, adding water and a water reducing agent into the mixture, and continuing to stir for a period of time to obtain the alkali-activated slag concrete containing the natural zeolite powder.
Preferably, in S1, the natural zeolite powder is subjected to a pretreatment process before being stirred, wherein the pretreatment process includes an acid soaking process and an air drying process.
Preferably, in the acid soaking step, the mass ratio of the acid solution to the natural zeolite powder is 1-1.2:1, the solute in the acid solution is hydrogen chloride, and the mass fraction of the solute in the acid solution is 1% -3%.
Preferably, in the airing process, the airing time is 48-72 h, and the airing temperature is 10-40 ℃.
Preferably, the pretreatment process further comprises a water washing process, and the water washing process is positioned between the acid soaking and drying processes.
The invention has the beneficial effects that:
1. the uniformity and the workability of the concrete mixture are improved, the hydration heat is reduced, and the strength of the concrete is improved.
2. Can inhibit the generation of alkali aggregate reaction in the mixture and is suitable for preparing large-volume concrete, sulfuric acid resistant concrete and light aggregate concrete.
3. The concrete has good workability of leaving the machine, avoids the phenomena of segregation, bleeding and the like, and ensures good pumpability.
4. The natural zeolite powder is a good substitute admixture of fly ash and silica fume, the source of the admixture is diversified, and the use of natural raw materials is effectively reduced.
In conclusion, the concrete provided by the invention can effectively improve the heat resistance of the traditional concrete, increase the cohesiveness of the concrete, improve the corrosion resistance of the concrete, reduce the time loss of the concrete, ensure the good pumpability of the concrete, improve the production efficiency, effectively reduce the self weight of the structure and ensure the safety of the structure.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Example 1
The alkali-activated slag concrete containing the natural zeolite powder comprises the following components in percentage by mass:
54 parts of light sand;
30 parts of lightweight aggregate;
38 parts of slag;
5.7 parts of magnesium oxide powder;
9 parts of natural zeolite powder;
0.5 part of a water reducing agent;
and 18 parts of water.
Furthermore, the light sand is waste glass slag, and the particle size of the light sand is 16-20 meshes.
Further, the lightweight aggregate is one or more of pumice, scoria, fly ash ceramsite and expanded slag beads, and the particle size of the lightweight aggregate is 40-60 meshes.
Furthermore, the particle size of the natural zeolite powder is 200 meshes-250 meshes.
Further, the water reducing agent is a polycarboxylic acid water reducing agent.
A preparation method of alkali-activated slag concrete containing natural zeolite powder comprises the following steps:
s1, adding the light sand, the light aggregate, the cement and the natural zeolite powder into a stirrer, and starting the stirrer to obtain a mixture:
s2, adding water and a water reducing agent into the mixture, continuing stirring for a period of time, and uniformly stirring to obtain the alkali-activated slag concrete containing the natural zeolite powder.
Further, in S1, the natural zeolite powder is subjected to a pretreatment process before being stirred, wherein the pretreatment process includes an acid soaking process and an air drying process.
Further, in the acid soaking step, the mass ratio of the acid solution to the natural zeolite powder is 1-1.2:1, the solute in the acid solution is hydrogen chloride, and the mass fraction of the solute in the acid solution is 3%.
Further, in the air drying process, the air drying time is 48 hours, the air drying temperature is 40 ℃, the natural zeolite powder is spread to the thickness of 1cm-3cm during air drying, the air drying is carried out, and ventilation is kept in the air drying process. Further, the pretreatment process also comprises a water washing process, wherein the water washing process is positioned between the acid soaking process and the airing process.
Example 2
An alkali-activated slag concrete containing natural zeolite powder comprises the following components in percentage by mass:
81 parts of light sand;
56 parts of lightweight aggregate;
60 parts of slag;
9 parts of magnesium oxide powder;
14 parts of natural zeolite powder;
2 parts of a water reducing agent;
28 parts of water.
Furthermore, the light sand is waste glass slag, and the particle size of the light sand is 16-20 meshes.
Further, the lightweight aggregate is one or more of pumice, scoria, fly ash ceramsite and expanded slag beads, and the particle size of the lightweight aggregate is 40-60 meshes.
Furthermore, the particle size of the natural zeolite powder is 200 meshes-250 meshes.
Further, the water reducing agent is a naphthalene water reducing agent.
A preparation method of alkali-activated slag concrete containing natural zeolite powder comprises the following steps:
s1, adding the light sand, the light aggregate, the cement and the natural zeolite powder into a stirrer, and starting the stirrer to obtain a mixture;
s2, adding water and a water reducing agent into the mixture, and continuing to stir for a period of time to obtain the alkali-activated slag concrete containing the natural zeolite powder.
Further, in S1, the natural zeolite powder is subjected to a pretreatment process before being stirred, wherein the pretreatment process includes an acid soaking process and an air drying process.
Furthermore, in the acid soaking process, the mass ratio of the acid solution to the natural zeolite powder is 1-1.2:1, the solute in the acid solution is hydrogen chloride, and the mass fraction of the solute in the acid solution is 1%.
Further, in the air drying process, the air drying time is 72 hours, the air drying temperature is 10 ℃, the natural zeolite powder is spread to the thickness of 1cm-3cm during air drying, the air drying is carried out, and ventilation should be kept in the air drying process.
Further, the pretreatment process also comprises a water washing process, wherein the water washing process is positioned between the acid soaking process and the airing process.
Example 3
The alkali-activated slag concrete containing the natural zeolite powder comprises the following components in percentage by mass:
70 parts of light sand;
42 parts of lightweight aggregate;
49 parts of slag;
7.35 parts of magnesium oxide powder;
12 parts of natural zeolite powder;
1.2 parts of a water reducing agent;
and 23 parts of water.
Furthermore, the light sand is waste glass slag, and the particle size of the light sand is 16-20 meshes.
Further, the lightweight aggregate is one or more of pumice, scoria and fly ash ceramsite, and the particle size of the lightweight aggregate is 40-60 meshes.
Furthermore, the particle size of the zeolite powder is 200 meshes-250 meshes.
Further, the water reducing agent is a polycarboxylic acid water reducing agent.
A preparation method of alkali-activated slag concrete containing natural zeolite powder comprises the following steps:
s1, adding the light sand, the light aggregate, the cement and the natural zeolite powder into a stirrer, and starting the stirrer to obtain a mixture;
s2, adding water and a water reducing agent into the mixture, and continuing to stir for a period of time to obtain the alkali-activated slag concrete containing the natural zeolite powder.
Further, in S1, the natural zeolite powder is subjected to a pretreatment process before being stirred, wherein the pretreatment process includes an acid soaking process and an air drying process. Furthermore, in the acid soaking process, the mass ratio of the acid solution to the natural zeolite powder is 1-1.2:1, the solute in the acid solution is hydrogen chloride, and the mass fraction of the solute in the acid solution is 2%.
Further, in the air drying process, the air drying time is 60 hours, the air drying temperature is 25 ℃, the natural zeolite powder is spread to the thickness of 1cm-3cm during air drying, the air drying is carried out, and ventilation should be kept in the air drying process.
Further, the pretreatment process also comprises a water washing process, wherein the water washing process is positioned between the acid soaking process and the airing process.
The alkali-activated slag concrete provided in examples 1 to 3 contains natural zeolite powder, which has good water retention property, can increase cohesiveness of the concrete, reduce the loss of the concrete over time, can improve the strength of the concrete, and can ensure good pumpability of the concrete, improve production efficiency, and the natural zeolite powder has low density, can effectively reduce the dead weight of the structure, and ensure the safety of the structure.
The acid soaking process can remove a small amount of carbonate compounds in the natural zeolite powder, and the removal of the carbonate compounds can enlarge the aperture of the natural zeolite powder, thereby being beneficial to increasing the specific surface area of the natural zeolite powder and improving the water retention of the natural zeolite powder; the washing process can remove salt generated in the acid soaking process, and further reduce adverse effects of impurities on concrete; the air-drying process can remove the moisture in the natural zeolite powder, so that the natural zeolite powder can be normally used.
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 (10)
1. The alkali-activated slag concrete containing the natural zeolite powder is characterized by comprising the following components in parts by mass:
54-81 parts of light sand;
30-56 parts of lightweight aggregate;
38-60 parts of slag;
5.7-9 parts of magnesium oxide;
9-14 parts of natural zeolite powder;
0.52 part of a water reducing agent;
and 18-28 parts of water.
2. The alkali-activated slag concrete containing natural zeolite powder as claimed in claim 1, wherein the light sand is waste glass slag, and the particle size of the light sand is 16-20 meshes.
3. The alkali-activated slag concrete containing natural zeolite powder as claimed in claim 1, wherein the lightweight aggregate is one or more of pumice, scoria and fly ash ceramsite, and the particle size of the lightweight aggregate is 40-60 meshes.
4. The alkali-activated slag concrete containing natural zeolite powder as claimed in claim 1, wherein the particle size of the natural zeolite powder is 200-250 mesh.
5. The alkali-activated slag concrete containing natural zeolite powder as claimed in claim 1, wherein the water reducing agent is one of a polycarboxylic acid water reducing agent or a naphthalene water reducing agent.
6. The preparation method of the alkali-activated slag concrete containing the natural zeolite powder as claimed in claim 1, which is characterized by comprising the following steps:
s1, adding the light sand, the light aggregate, the slag, the magnesium oxide powder and the natural zeolite powder into a stirrer, and starting the stirrer to obtain a mixture;
s2, adding water and a water reducing agent into the mixture, and continuing to stir for a period of time to obtain the alkali-activated slag concrete containing the natural zeolite powder.
7. The method for preparing alkali-activated slag concrete containing natural zeolite powder as claimed in claim 6, wherein in S1, the natural zeolite powder is subjected to a pretreatment process before stirring, wherein the pretreatment process comprises an acid soaking process and an air drying process.
8. The method for preparing alkali-activated slag concrete containing natural zeolite powder as claimed in claim 6, wherein in the acid soaking step, the mass ratio of the acid solution to the natural zeolite powder is 1-1.2:1, the solute in the acid solution is hydrogen chloride, and the mass fraction of the solute in the acid solution is 1-3%.
9. The method for preparing alkali-activated slag concrete containing natural zeolite powder according to claim 6, wherein in the air-drying procedure, the air-drying time is 48-72 h, and the air-drying temperature is 10-40 ℃.
10. The method for preparing alkali-activated slag concrete containing natural zeolite powder according to claim 6, wherein the pretreatment process further comprises a water washing process, and the water washing process is positioned between the acid soaking process and the air drying process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110344862.6A CN113087476A (en) | 2021-03-29 | 2021-03-29 | Alkali-activated slag concrete containing natural zeolite powder and preparation method thereof |
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| CN202110344862.6A CN113087476A (en) | 2021-03-29 | 2021-03-29 | Alkali-activated slag concrete containing natural zeolite powder and preparation method thereof |
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| CN113087476A true CN113087476A (en) | 2021-07-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643348A (en) * | 2009-09-15 | 2010-02-10 | 中建三局建设工程股份有限公司 | Lightweight aggregate concrete with zeolite powder and natural river sand and preparation method thereof |
| KR101912626B1 (en) * | 2018-03-26 | 2018-10-29 | 주식회사 부원지에프씨 | Mortar composition for repairing and reinforcing underwater concrete structures, and method of repairing and reinforcing underwater concrete structures using the same |
| CN109437707A (en) * | 2018-12-28 | 2019-03-08 | 广西建宏水泥制品有限公司 | A kind of concrete and preparation method thereof containing natural zeolite powder |
| CN111470828A (en) * | 2020-03-30 | 2020-07-31 | 辽宁工程技术大学 | Novel fiber-reinforced alkali-activated slag concrete material and preparation method thereof |
-
2021
- 2021-03-29 CN CN202110344862.6A patent/CN113087476A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643348A (en) * | 2009-09-15 | 2010-02-10 | 中建三局建设工程股份有限公司 | Lightweight aggregate concrete with zeolite powder and natural river sand and preparation method thereof |
| KR101912626B1 (en) * | 2018-03-26 | 2018-10-29 | 주식회사 부원지에프씨 | Mortar composition for repairing and reinforcing underwater concrete structures, and method of repairing and reinforcing underwater concrete structures using the same |
| CN109437707A (en) * | 2018-12-28 | 2019-03-08 | 广西建宏水泥制品有限公司 | A kind of concrete and preparation method thereof containing natural zeolite powder |
| CN111470828A (en) * | 2020-03-30 | 2020-07-31 | 辽宁工程技术大学 | Novel fiber-reinforced alkali-activated slag concrete material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 徐维忠等: "《高等学校教学用书 建筑材料》", 28 February 1962, 中国工业出版社 * |
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