CN112159156A - Asphalt concrete with acidic aggregate and preparation method thereof - Google Patents
Asphalt concrete with acidic aggregate and preparation method thereof Download PDFInfo
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- CN112159156A CN112159156A CN202011089952.7A CN202011089952A CN112159156A CN 112159156 A CN112159156 A CN 112159156A CN 202011089952 A CN202011089952 A CN 202011089952A CN 112159156 A CN112159156 A CN 112159156A
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- aggregate
- asphalt
- acidic
- asphalt concrete
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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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/048—Granite
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
- C04B24/121—Amines, polyamines
Abstract
The invention discloses an acid aggregate asphalt concrete, which is mainly applied to the field of a hydraulic and hydroelectric engineering professional asphalt concrete seepage-proofing technology and comprises the following materials in percentage: 7.2-8.0% of asphalt; 80-90% of an acidic aggregate; 2-4% of mineral powder; 0.3-1.5% of anti-stripping agent; 8.0-12% of iron tailing master batch; the acidic aggregate is granite or gneiss and the like, and the particle size of the aggregate is within 20 mm. According to the invention, the acid aggregate is mixed with the asphalt, after the anti-stripping agent is added into the asphalt, a good and stable colloid net is formed between the acid aggregate and the asphalt, the good improvement effect on the structural strength of the asphalt concrete is achieved, the Marshall stability of the asphalt concrete is greatly improved, after the anti-stripping agent is added into the asphalt, the adhesiveness with the acid aggregate is greatly enhanced, the durability of the asphalt concrete is improved, and the use of the acid aggregate can be saved, so that the problem of the aggregate source of the asphalt concrete is greatly solved.
Description
Technical Field
The invention relates to the technical field of asphalt concrete seepage prevention of hydraulic and hydroelectric engineering, in particular to an acid aggregate asphalt concrete and a preparation method thereof.
Background
In the water conservancy and hydropower major, a concrete building needs to have better anti-seepage performance, most of the existing hydraulic concrete is mixed by adopting alkaline aggregate, the anti-seepage performance is general, and the concrete is easy to crack due to lower internal bonding strength in the using process.
Researches show that the alkaline aggregate can accelerate the setting speed to be too fast during construction, influence the fluidity and the slump, cause the unsuitable construction and influence the later strength, in addition, concrete using the alkaline aggregate can crack after the construction, the strength is too low, the impermeability is low and other consequences are caused, and the prior concrete mostly adopts the alkaline aggregate, and the problem of the shortage of the material source of the aggregate is serious because the mining of stones is limited in various regions.
Disclosure of Invention
The invention aims to provide an acid aggregate asphalt concrete and a preparation method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the acid aggregate asphalt concrete is characterized by comprising the following materials in percentage by weight:
7.2-8.0% of asphalt;
80-90% of an acidic aggregate;
2-4% of mineral powder;
the mixing amount of the anti-stripping agent accounts for 0.3-1.5% of the weight of the asphalt;
0.06-0.08% of anti-rutting agent;
8.0-12% of iron tailing master batch;
preferably, the acidic aggregate is granite or gneiss and other acidic aggregates.
Preferably, the acidic aggregate is prepared by mixing 3-6 mm, 6-8 mm and 8-20 mm aggregate particles according to the weight ratio of the acidic aggregate to the acidic aggregate: 4: 6 parts by weight.
Preferably, the anti-stripping agent is a liquid anti-stripping agent derived from an amino amine.
Preferably, the iron tailing master batch is prepared by mixing the Anshan high-silicon type iron tailings, the martensite high-aluminum type iron tailings and Handan high-calcium magnesium type iron tailings according to any weight part ratio.
Preferably, the anti-rutting agent is RA anti-rutting agent.
A preparation method of acid aggregate asphalt concrete comprises the following steps:
step one, stirring and drying the acidic aggregate in corresponding parts by weight in drying equipment, controlling the temperature at 110-120 ℃, the time at 80-150 min, and the stirring speed at 1500-2000 rpm to obtain the dried acidic aggregate;
screening the dried acidic aggregate to obtain acidic aggregate particles with the particle sizes of 3-6 mm, 6-8 mm and 8-20 mm respectively, adding mineral powder, an anti-rutting agent and an iron tailing master batch, and mixing the materials according to the weight ratio of 3: 4: 6, uniformly mixing the components in parts by weight to obtain an acidic aggregate ingredient;
step three, heating the asphalt in the corresponding weight part, pouring the acidic aggregate ingredient into the asphalt for stirring when the asphalt is heated to 180-200 ℃, and adding an anti-stripping agent in the stirring process, wherein the stirring speed is 1200-1500 rpm;
and fifthly, discharging the uniformly mixed ingredients, and controlling the discharge temperature to be 160-180 ℃ to obtain the acid aggregate concrete.
Preferably, anti-crack fibers are added during the heating process of the asphalt in the third step.
Compared with the prior art, the invention has the advantages that:
according to the invention, the acid aggregate is mixed with the concrete, a good and stable colloid net is formed between the acid aggregate and the asphalt, the improvement effect on the structural strength of the asphalt concrete is good, the Marshall stability of the asphalt concrete is greatly improved, the adhesion of the asphalt with the acid aggregate is greatly enhanced after the anti-stripping agent is added to the asphalt, the durability of the asphalt concrete is improved, and the use of the acid aggregate can be saved, so that the problem of the aggregate source of the asphalt concrete is greatly solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a Marshall stability test Table in an example of the invention;
FIG. 2 is a table comparing the addition of an anti-spalling agent to the absence of an added spalling agent in an example of the invention.
Detailed Description
The first embodiment,
The acid aggregate asphalt concrete comprises the following materials in percentage by weight:
7.2-8.0% of asphalt; 80-90% of an acidic aggregate; 2-4% of mineral powder; the mixing amount of the anti-stripping agent accounts for 0.3-1.5% of the weight of the asphalt; 0.06-0.08% of anti-rutting agent; 8.0-12% of iron tailing master batch;
wherein the acidic aggregate is granite or gneiss and other acidic aggregates; the acidic aggregate is prepared by mixing 3-6 mm, 6-8 mm and 8-16 mm aggregate particles according to the weight ratio of the acidic aggregate to the aggregate: 4: 6 parts by weight of the components are mixed; the anti-stripping agent is a liquid anti-stripping agent derived from amino amine; the iron tailing master batch is formed by mixing Anshan high-silicon type iron tailings, horse steel high-aluminum type iron tailings and Handan chen high-calcium magnesium type iron tailings according to any weight part ratio; the anti-rut agent is RA anti-rut agent.
The preparation method of the acid aggregate asphalt concrete comprises the following steps:
step one, stirring and drying the acidic aggregate in corresponding parts by weight in drying equipment, controlling the temperature at 110-120 ℃, the time at 80-150 min, and the stirring speed at 1500-2000 rpm to obtain the dried acidic aggregate;
screening the dried acidic aggregate to obtain acidic aggregate particles with the particle sizes of 3-6 mm, 6-8 mm and 8-16 mm respectively, adding mineral powder, an anti-rutting agent and an iron tailing master batch, and mixing the materials according to the weight ratio of 3: 4: 6, uniformly mixing the components in parts by weight to obtain an acidic aggregate ingredient;
step three, heating the asphalt in the corresponding weight part, pouring the acidic aggregate ingredient into the asphalt for stirring when the asphalt is heated to 180-200 ℃, and adding an anti-stripping agent in the stirring process, wherein the stirring speed is 1200-1500 rpm;
discharging the uniformly mixed ingredients, and controlling the discharge temperature to be 160-180 ℃ to obtain the acidic aggregate concrete;
and step three, adding anti-crack fibers in the asphalt heating process.
Example II,
The acid aggregate asphalt concrete comprises the following materials in percentage by weight:
8.0% of asphalt; 90% of acidic aggregate; 4% of mineral powder; the mixing amount of the anti-stripping agent accounts for 0.3 percent of the weight ratio of the asphalt; anti-rut agent 0.08; 12% of iron tailing master batch;
wherein the acidic aggregate is granite or gneiss and other acidic aggregates; the acidic aggregate is prepared from aggregate particles with the particle sizes of 6mm, 8mm and 20mm according to the proportion of 3: 4: 6 parts by weight of the components are mixed; the anti-stripping agent is a liquid anti-stripping agent derived from amino amine; the iron tailing master batch is formed by mixing Anshan high-silicon type iron tailings, horse steel high-aluminum type iron tailings and Handan chen high-calcium magnesium type iron tailings according to any weight part ratio; the anti-rut agent is RA anti-rut agent.
The preparation method of the acid aggregate asphalt concrete comprises the following steps:
step one, stirring and drying the acidic aggregate in corresponding parts by weight in drying equipment, controlling the temperature at 120 ℃, the time at 150min and the stirring speed at 2000rpm to obtain the dried acidic aggregate;
screening the dried acidic aggregate to obtain acidic aggregate particles with the particle sizes of 6mm, 8mm and 20mm respectively, adding mineral powder, an anti-rutting agent and an iron tailing master batch, and mixing the materials according to the weight ratio of 3: 4: 6, uniformly mixing the components in parts by weight to obtain an acidic aggregate ingredient;
step three, heating the asphalt in the corresponding weight part, pouring the acidic aggregate ingredient into the asphalt to be stirred when the asphalt is heated to 200 ℃, and adding the anti-stripping agent in the stirring process, wherein the stirring speed is 1500 rpm;
discharging the uniformly mixed ingredients, and controlling the discharge temperature at 180 ℃ to obtain the acidic aggregate concrete;
and step three, adding anti-crack fibers in the asphalt heating process.
Example III,
The acid aggregate asphalt concrete comprises the following materials in percentage by weight:
7.8 percent of asphalt; 85% of acid aggregate; 3% of mineral powder; the mixing amount of the anti-stripping agent accounts for 1.5 percent of the weight ratio of the asphalt; 0.07 parts of anti-rutting agent; 10% of iron tailing master batch;
wherein the acidic aggregate is granite or gneiss and other aggregates; the acidic aggregate is prepared from aggregate particles with the particle sizes of 5mm, 7mm and 12mm according to the proportion of 3: 4: 6 parts by weight of the components are mixed; the anti-stripping agent is a liquid anti-stripping agent derived from amino amine; the iron tailing master batch is formed by mixing Anshan high-silicon type iron tailings, horse steel high-aluminum type iron tailings and Handan chen high-calcium magnesium type iron tailings according to any weight part ratio; the anti-rut agent is RA anti-rut agent.
The preparation method of the acid aggregate asphalt concrete comprises the following steps:
step one, stirring and drying the acid aggregate in corresponding parts by weight in drying equipment, controlling the temperature at 115 ℃, the time at 120min and the stirring speed at 1700rpm to obtain the dried acid aggregate;
screening the dried acidic aggregate to obtain acidic aggregate particles with the particle sizes of 5mm, 7mm and 12mm respectively, adding mineral powder, an anti-rutting agent and an iron tailing master batch, and mixing the materials according to the weight ratio of 3: 4: 6, uniformly mixing the components in parts by weight to obtain an acidic aggregate ingredient;
step three, heating the asphalt in the corresponding weight part, pouring the acidic aggregate ingredient into the asphalt to be stirred when the asphalt is heated to 190 ℃, and adding the anti-stripping agent in the stirring process, wherein the stirring speed is 1300 rpm;
discharging the uniformly mixed ingredients, and controlling the discharge temperature at 170 ℃ to obtain the acidic aggregate concrete;
and step three, adding anti-crack fibers in the asphalt heating process.
As shown in fig. 1, the marshall stability is the maximum stress when the marshall test piece is broken in the marshall stability test, and the flow value is the corresponding deformation, and generally, it is considered that the larger the stability and the smaller the deformation are better, indicating that the strength of the mixture is higher. The results of the tests on the acid concrete aggregate of the three groups of examples are contrasted, a good and stable colloidal network is formed between the acid aggregate and the asphalt, the improvement effect on the structural strength of the asphalt concrete is good, the Marshall stability of the asphalt concrete is greatly improved, and the cracking of the asphalt concrete is not easy to occur by adding anti-cracking fibers into the asphalt.
As shown in fig. 2, the addition of the anti-stripping agent to asphalt can improve the aging resistance and the water damage resistance of asphalt concrete, so that the adhesion of asphalt to acidic aggregate is greatly enhanced and the durability of asphalt concrete is improved after the addition of the anti-stripping agent to asphalt, which reduces the cost of later maintenance.
At present, the acidic aggregate is generally specified and is not advocated for use, but after the anti-stripping agent is added, the acidic aggregate can be adopted, and the acidic aggregate cannot cause the concrete to be too fast in setting during construction, so that the influence on the fluidity and the slump are reduced, and the problem of the aggregate source of the asphalt concrete is greatly solved.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes or modifications may be made by the patentees within the scope of the appended claims, and within the scope of the invention, as long as they do not exceed the scope of the invention described in the claims.
Claims (8)
1. The acid aggregate asphalt concrete is characterized by comprising the following materials in percentage by weight:
7.2-8.0% of asphalt;
80-90% of an acidic aggregate;
2-4% of mineral powder;
the mixing amount of the anti-stripping agent accounts for 0.3-1.5% of the weight of the asphalt;
0.06-0.08% of anti-rutting agent;
8.0-12% of iron tailing master batch.
2. The acidic aggregate asphalt concrete according to claim 1, wherein: the acidic aggregate is granite or gneiss and other acidic aggregates.
3. The acidic aggregate asphalt concrete according to claim 2, wherein: the acidic aggregate is prepared by mixing 3-6 mm, 6-8 mm and 8-20 mm aggregate particles according to the weight ratio of the acidic aggregate to the aggregate: 4: 6 parts by weight.
4. The acidic aggregate asphalt concrete according to claim 1, wherein: the anti-stripping agent is a liquid anti-stripping agent derived from amino amine.
5. The acidic aggregate asphalt concrete according to claim 1, wherein: the iron tailing master batch is prepared by mixing Anshan high-silicon type iron tailings, martensitic high-aluminum type iron tailings and Handan chen high-calcium magnesium type iron tailings according to any weight part ratio.
6. The acidic aggregate asphalt concrete according to claim 1, wherein: the anti-rut agent is RA anti-rut agent.
7. The preparation method of the acid aggregate asphalt concrete is characterized by comprising the following steps:
step one, stirring and drying the acidic aggregate in corresponding parts by weight in drying equipment, controlling the temperature at 110-120 ℃, the time at 80-150 min, and the stirring speed at 1500-2000 rpm to obtain the dried acidic aggregate;
screening the dried acidic aggregate to obtain acidic aggregate particles with the particle sizes of 3-6 mm, 6-8 mm and 8-20 mm respectively, adding mineral powder, an anti-rutting agent and an iron tailing master batch, and mixing the materials according to the weight ratio of 3: 4: 6, uniformly mixing the components in parts by weight to obtain an acidic aggregate ingredient;
step three, heating the asphalt in the corresponding weight part, pouring the acidic aggregate ingredient into the asphalt for stirring when the asphalt is heated to 180-200 ℃, and adding an anti-stripping agent in the stirring process, wherein the stirring speed is 1200-1500 rpm;
and fifthly, discharging the uniformly mixed ingredients, and controlling the discharge temperature to be 160-180 ℃ to obtain the acid aggregate concrete.
8. The method for preparing an acidic aggregate asphalt concrete according to claim 7, wherein: and adding anti-crack fibers in the asphalt heating process in the third step.
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| CN202011089952.7A CN112159156A (en) | 2020-11-04 | 2020-11-04 | Asphalt concrete with acidic aggregate and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114409311A (en) * | 2022-01-29 | 2022-04-29 | 广东省水利水电第三工程局有限公司 | High-performance asphalt concrete and preparation method thereof |
| CN115124281A (en) * | 2022-06-17 | 2022-09-30 | 中国电建集团北京勘测设计研究院有限公司 | Acidic aggregate modified asphalt concrete for impermeable layer and construction method thereof |
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| KR100908739B1 (en) * | 2008-06-19 | 2009-07-22 | (주)한동알앤씨 | Asphalt concrete using recycling aggregate |
| CN109293280A (en) * | 2018-09-08 | 2019-02-01 | 平湖市中建沥青混凝土工程有限公司 | A kind of bituminous concrete and its preparation process |
| CN110436828A (en) * | 2019-08-09 | 2019-11-12 | 长江水利委员会长江科学院 | Hydraulic asphalt concrete and preparation method thereof containing acid stone |
| CN111592322A (en) * | 2020-06-03 | 2020-08-28 | 安徽华仁路桥工程有限公司 | High-stability colored asphalt concrete and preparation method thereof |
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2020
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101134655A (en) * | 2007-07-31 | 2008-03-05 | 武汉理工大学 | Gneiss asphalt concrete and method for making same |
| KR100908739B1 (en) * | 2008-06-19 | 2009-07-22 | (주)한동알앤씨 | Asphalt concrete using recycling aggregate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114409311A (en) * | 2022-01-29 | 2022-04-29 | 广东省水利水电第三工程局有限公司 | High-performance asphalt concrete and preparation method thereof |
| CN115124281A (en) * | 2022-06-17 | 2022-09-30 | 中国电建集团北京勘测设计研究院有限公司 | Acidic aggregate modified asphalt concrete for impermeable layer and construction method thereof |
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Application publication date: 20210101 |