CN108017331B - High-ductility asphalt concrete - Google Patents
High-ductility asphalt concrete Download PDFInfo
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- CN108017331B CN108017331B CN201711459437.1A CN201711459437A CN108017331B CN 108017331 B CN108017331 B CN 108017331B CN 201711459437 A CN201711459437 A CN 201711459437A CN 108017331 B CN108017331 B CN 108017331B
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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
-
- 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
- C04B14/38—Fibrous materials; Whiskers
- C04B14/42—Glass
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B24/24—Macromolecular compounds
- C04B24/36—Bituminous materials, e.g. tar, pitch
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses high-ductility asphalt concrete, which relates to the technical field of building materials and is prepared from the following components in parts by weight: cement, polycrystalline mullite fiber, sodium tripolyphosphate modified fly ash, sand, stearic acid modified asphalt, barite powder, hexenyl bis stearamide modified glass fiber, expanded perlite, soybean starch, an organic silicon defoamer, diisopropanolamine and water; the high-ductility asphalt concrete disclosed by the invention is strong in permeability and excellent in secondary impermeability, and all indexes of the high-ductility asphalt concrete meet the national standard GB 18445-2012; the fly ash modified by the high-activity sodium tripolyphosphate reacts with the barite powder to generate chemical crystals, so that the self-healing capability of the concrete is greatly improved.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to high-ductility asphalt concrete.
Background
The concrete is the most widely used building material in modern times, and has the advantages of rich raw materials, low price, simple process, high strength, good durability and the like. The premixed concrete is one kind of concrete, and is concrete mixture which is prepared with cement, aggregate, water, additive, mineral admixture and other components in certain proportion, and through metering, mixing and other steps. Because of the great environmental impact of site operations, ready mixed concrete is receiving increasing attention. However, the existing concrete has poor ductility, and after the concrete is solidified, the concrete is expanded with heat or contracted with cold more seriously, so that internal cracks are easy to appear, and the service life of the concrete is greatly reduced.
Disclosure of Invention
The invention aims to provide asphalt concrete with high ductility aiming at the existing problems.
The invention is realized by the following technical scheme:
the high-ductility asphalt concrete is prepared from the following components in parts by weight: 60-85 parts of cement, 4-6 parts of polycrystalline mullite fiber, 20-28 parts of sodium tripolyphosphate modified fly ash, 130-150 parts of sand, 15-30 parts of stearic acid modified asphalt, 4-10 parts of barite powder, 5-12 parts of hexenyl bis stearamide modified glass fiber, 6-10 parts of expanded perlite, 22-26 parts of soybean starch, 2.2-2.5 parts of organic silicon defoamer, 0.1-0.3 part of diisopropanolamine and 55-80 parts of water.
Further, the sand has a particle size of 40 meshes.
Further, the alumina content of the polycrystalline mullite fiber is 82.35 percent.
Further, the preparation method of the stearic acid modified asphalt comprises the following steps:
heating asphalt to 155 ℃, adding stearic acid for the first time at the rotating speed of 750r/min, keeping the temperature and stirring for 30min, then adjusting the temperature to 170 ℃, keeping the temperature for 20min, then adjusting the temperature to 160 ℃, adding stearic acid for the second time at the rotating speed of 1500r/min, keeping the temperature and stirring for 10min, then adding esterified starch accounting for 1.2 percent of the mass of the asphalt, and continuing to keep the temperature and stirring for 30min to obtain the modified asphalt.
Further, the esterified starch is octenyl succinate starch.
Further, the diameter of the glass fiber is 50 μm.
Further, the preparation method of the sodium tripolyphosphate modified fly ash comprises the following steps:
soaking the fly ash in acetone for 10min, filtering, drying to constant weight, adding into a resistance furnace, calcining at 685 ℃ for 35min, cooling to 80 ℃, preserving heat for 40min, uniformly mixing with a sodium tripolyphosphate solution with the mass fraction of 15%, soaking at 80 ℃ for 2 h, filtering, and drying to constant weight to obtain the finished product.
Further, the preparation method of the hexenyl bis stearamide modified glass fiber comprises the following steps: soaking the glass fiber in an organosilane coupling agent solution with the mass fraction of 5.5%, soaking at 70 ℃ for 20min, adding hexenyl bis stearamide with the mass fraction of 10% of the glass fiber, continuing to soak for 1.5 h, then filtering, cleaning with deionized water, and drying to constant weight to obtain the glass fiber.
Compared with the prior art, the invention has the following advantages: through a large number of experimental researches, the invention modifies the asphalt, and the original colloid structure in the asphalt is changed by adopting the synergistic action of stearic acid and esterified starch, so that the softening point of the asphalt can be greatly improved, the penetration and the ductility are reduced, the strength and the stability of an aggregate-asphalt interface network structure are enhanced by applying the modified asphalt to the concrete, the interface adhesion force of the aggregate-asphalt is improved, and the integral toughness and tensile strength of the concrete are enhanced, so that the obtained asphalt concrete has good interface adhesion strength, good uniformity, high durability and strong integral performance, and the strength of the concrete can be effectively improved and the extensibility of the prepared concrete in a certain temperature environment can be greatly improved by adding the synergistic action of the hexenyl bis stearamide modified glass fiber and the sodium tripolyphosphate modified fly ash, therefore, the stearic acid modified asphalt can adapt to more climates, meanwhile, a thicker bonding film can be formed on the surface of concrete, the surface adhesion performance is improved, particularly, the temperature sensitivity of the concrete can be reduced, the deformation resistance of the concrete at high temperature is improved, the viscoelasticity and the extensibility of the concrete at low temperature are also improved, the permeability is strong, the secondary impermeability is excellent, and all indexes meet the national standard GB 18445-2012; the fly ash modified by the high-activity sodium tripolyphosphate reacts with the barite powder to generate chemical crystals, so that the self-healing capability of the concrete is greatly improved.
Detailed Description
Example 1
The high-ductility asphalt concrete is prepared from the following components in parts by weight: 60 parts of cement, 4 parts of polycrystalline mullite fiber, 20 parts of sodium tripolyphosphate modified fly ash, 130 parts of sand, 15 parts of stearic acid modified asphalt, 4 parts of barite powder, 5 parts of hexenyl bis stearamide modified glass fiber, 6 parts of expanded perlite, 22 parts of soybean starch, 2.2 parts of an organic silicon defoamer, 0.1 part of diisopropanolamine and 55 parts of water.
Further, the sand has a particle size of 40 meshes.
Further, the alumina content of the polycrystalline mullite fiber is 82.35 percent.
Further, the preparation method of the stearic acid modified asphalt comprises the following steps:
heating asphalt to 155 ℃, adding stearic acid for the first time at the rotating speed of 750r/min, keeping the temperature and stirring for 30min, then adjusting the temperature to 170 ℃, keeping the temperature for 20min, then adjusting the temperature to 160 ℃, adding stearic acid for the second time at the rotating speed of 1500r/min, keeping the temperature and stirring for 10min, then adding esterified starch accounting for 1.2 percent of the mass of the asphalt, and continuing to keep the temperature and stirring for 30min to obtain the modified asphalt.
Further, the esterified starch is octenyl succinate starch.
Further, the diameter of the glass fiber is 50 μm.
Further, the preparation method of the sodium tripolyphosphate modified fly ash comprises the following steps:
soaking the fly ash in acetone for 10min, filtering, drying to constant weight, adding into a resistance furnace, calcining at 685 ℃ for 35min, cooling to 80 ℃, preserving heat for 40min, uniformly mixing with a sodium tripolyphosphate solution with the mass fraction of 15%, soaking at 80 ℃ for 2 h, filtering, and drying to constant weight to obtain the finished product.
Further, the preparation method of the hexenyl bis stearamide modified glass fiber comprises the following steps: soaking the glass fiber in an organosilane coupling agent solution with the mass fraction of 5.5%, soaking at 70 ℃ for 20min, adding hexenyl bis stearamide with the mass fraction of 10% of the glass fiber, continuing to soak for 1.5 h, then filtering, cleaning with deionized water, and drying to constant weight to obtain the glass fiber.
Example 2
The high-ductility asphalt concrete is prepared from the following components in parts by weight: 85 parts of cement, 6 parts of polycrystalline mullite fiber, 28 parts of sodium tripolyphosphate modified fly ash, 150 parts of sand, 30 parts of stearic acid modified asphalt, 10 parts of barite powder, 12 parts of hexenyl bis stearamide modified glass fiber, 10 parts of expanded perlite, 26 parts of soybean starch, 2.5 parts of an organic silicon defoamer, 0.3 part of diisopropanolamine and 80 parts of water.
Further, the sand has a particle size of 40 meshes.
Further, the alumina content of the polycrystalline mullite fiber is 82.35 percent.
Further, the preparation method of the stearic acid modified asphalt comprises the following steps:
heating asphalt to 155 ℃, adding stearic acid for the first time at the rotating speed of 750r/min, keeping the temperature and stirring for 30min, then adjusting the temperature to 170 ℃, keeping the temperature for 20min, then adjusting the temperature to 160 ℃, adding stearic acid for the second time at the rotating speed of 1500r/min, keeping the temperature and stirring for 10min, then adding esterified starch accounting for 1.2 percent of the mass of the asphalt, and continuing to keep the temperature and stirring for 30min to obtain the modified asphalt.
Further, the esterified starch is octenyl succinate starch.
Further, the diameter of the glass fiber is 50 μm.
Further, the preparation method of the sodium tripolyphosphate modified fly ash comprises the following steps:
soaking the fly ash in acetone for 10min, filtering, drying to constant weight, adding into a resistance furnace, calcining at 685 ℃ for 35min, cooling to 80 ℃, preserving heat for 40min, uniformly mixing with a sodium tripolyphosphate solution with the mass fraction of 15%, soaking at 80 ℃ for 2 h, filtering, and drying to constant weight to obtain the finished product.
Further, the preparation method of the hexenyl bis stearamide modified glass fiber comprises the following steps: soaking the glass fiber in an organosilane coupling agent solution with the mass fraction of 5.5%, soaking at 70 ℃ for 20min, adding hexenyl bis stearamide with the mass fraction of 10% of the glass fiber, continuing to soak for 1.5 h, then filtering, cleaning with deionized water, and drying to constant weight to obtain the glass fiber.
Example 3
The high-ductility asphalt concrete is prepared from the following components in parts by weight: 72 parts of cement, 25 parts of polycrystalline mullite fiber 5, 25 parts of sodium tripolyphosphate modified fly ash, 140 parts of sand, 20 parts of stearic acid modified asphalt, 6 parts of barite powder, 10 parts of hexenyl bis stearamide modified glass fiber, 8 parts of expanded perlite, 25 parts of soybean starch, 2.3 parts of an organic silicon defoamer, 0.2 part of diisopropanolamine and 60 parts of water.
Further, the sand has a particle size of 40 meshes.
Further, the alumina content of the polycrystalline mullite fiber is 82.35 percent.
Further, the preparation method of the stearic acid modified asphalt comprises the following steps:
heating asphalt to 155 ℃, adding stearic acid for the first time at the rotating speed of 750r/min, keeping the temperature and stirring for 30min, then adjusting the temperature to 170 ℃, keeping the temperature for 20min, then adjusting the temperature to 160 ℃, adding stearic acid for the second time at the rotating speed of 1500r/min, keeping the temperature and stirring for 10min, then adding esterified starch accounting for 1.2 percent of the mass of the asphalt, and continuing to keep the temperature and stirring for 30min to obtain the modified asphalt.
Further, the esterified starch is octenyl succinate starch.
Further, the diameter of the glass fiber is 50 μm.
Further, the preparation method of the sodium tripolyphosphate modified fly ash comprises the following steps:
soaking the fly ash in acetone for 10min, filtering, drying to constant weight, adding into a resistance furnace, calcining at 685 ℃ for 35min, cooling to 80 ℃, preserving heat for 40min, uniformly mixing with a sodium tripolyphosphate solution with the mass fraction of 15%, soaking at 80 ℃ for 2 h, filtering, and drying to constant weight to obtain the finished product.
Further, the preparation method of the hexenyl bis stearamide modified glass fiber comprises the following steps: soaking the glass fiber in an organosilane coupling agent solution with the mass fraction of 5.5%, soaking at 70 ℃ for 20min, adding hexenyl bis stearamide with the mass fraction of 10% of the glass fiber, continuing to soak for 1.5 h, then filtering, cleaning with deionized water, and drying to constant weight to obtain the glass fiber.
Comparative example 1: the only difference from example 1 is that the stearic acid-modified asphalt was replaced with an unmodified asphalt.
Comparative example 2: the only difference from example 1 is that the sodium tripolyphosphate modified fly ash was replaced with unmodified fly ash.
Comparative example 3: the only difference from example 1 was that the hexenyl bis stearamide modified glass fibers were replaced with glass fibers treated with an organosilane coupling agent.
The concrete of examples and comparative examples were tested for ductility:
TABLE 1
| Ductility% | |
| Example 1 | 7.03 |
| Example 2 | 7.06 |
| Example 3 | 7.02 |
| Comparative example 1 | 3.15 |
| Comparative example 2 | 5.63 |
| Comparative example 3 | 5.24 |
As can be seen from Table 1, the concrete prepared according to the present invention has good ductility.
The example and comparative concrete were tested according to standard GB 18445-2012:
TABLE 2
| Impermeability MPa | Secondary impermeability MPa | |
| Example 1 | 1.63 | 1.38 |
| Example 2 | 1.60 | 1.36 |
| Example 3 | 1.62 | 1.37 |
| Comparative example 1 | 1.25 | 0.81 |
| Comparative example 2 | 1.46 | 1.12 |
| Comparative example 3 | 1.60 | 1.35 |
As can be seen from Table 2, the stearic acid modified asphalt and the sodium tripolyphosphate modified fly ash added in the invention can obviously improve the impermeability of concrete, and particularly the secondary impermeability is still superior.
Claims (5)
1. The high-ductility asphalt concrete is characterized by being prepared from the following components in parts by weight: 60-85 parts of cement, 4-6 parts of polycrystalline mullite fiber, 20-28 parts of sodium tripolyphosphate modified fly ash, 150 parts of sand 130-doped materials, 15-30 parts of stearic acid modified asphalt, 4-10 parts of barite powder, 5-12 parts of hexenyl bis stearamide modified glass fiber, 6-10 parts of expanded perlite, 22-26 parts of soybean starch, 2.2-2.5 parts of organic silicon defoamer, 0.1-0.3 part of diisopropanolamine and 55-80 parts of water;
the preparation method of the stearic acid modified asphalt comprises the following steps:
heating asphalt to 155 ℃, adding stearic acid for the first time at the rotating speed of 750r/min, keeping the temperature and stirring for 30min, then adjusting the temperature to 170 ℃, keeping the temperature for 20min, then adjusting the temperature to 160 ℃, adding stearic acid for the second time at the rotating speed of 1500r/min, keeping the temperature and stirring for 10min, then adding esterified starch accounting for 1.2 percent of the mass of the asphalt, and continuing to keep the temperature and stirring for 30min to obtain the modified asphalt;
the preparation method of the sodium tripolyphosphate modified fly ash comprises the following steps:
soaking the fly ash in acetone for 10min, filtering, drying to constant weight, adding into a resistance furnace, calcining at 685 ℃ for 35min, cooling to 80 ℃, preserving heat for 40min, uniformly mixing with a sodium tripolyphosphate solution with the mass fraction of 15%, soaking at 80 ℃ for 2 h, filtering, and drying to constant weight to obtain the fly ash;
the preparation method of the hexenyl bis stearamide modified glass fiber comprises the following steps: soaking the glass fiber in an organosilane coupling agent solution with the mass fraction of 5.5%, soaking at 70 ℃ for 20min, adding hexenyl bis stearamide with the mass fraction of 10% of the glass fiber, continuing to soak for 1.5 h, then filtering, cleaning with deionized water, and drying to constant weight to obtain the glass fiber.
2. The high ductility asphalt concrete according to claim 1, wherein the sand has a particle size of 40 mesh.
3. The high ductility asphalt concrete according to claim 1, wherein the alumina content of the polycrystalline mullite fibers is 82.35%.
4. A high ductility asphalt concrete according to claim 1, wherein said esterified starch is octenyl succinated starch.
5. The high ductility asphalt concrete according to claim 1, wherein the glass fiber has a diameter of 50 μm.
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| CN201711459437.1A CN108017331B (en) | 2017-12-28 | 2017-12-28 | High-ductility asphalt concrete |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711459437.1A CN108017331B (en) | 2017-12-28 | 2017-12-28 | High-ductility asphalt concrete |
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| CN108017331B true CN108017331B (en) | 2021-04-09 |
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| CN108751874B (en) * | 2018-08-14 | 2021-08-17 | 贵州大兴旺新材料科技有限公司 | High-performance colored pervious asphalt concrete and preparation method thereof |
| CN113735511A (en) * | 2021-09-06 | 2021-12-03 | 中象新材料（大连）有限公司 | Application of starch octenyl succinate, building mortar, putty and ceramic tile adhesive |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104891898A (en) * | 2015-05-16 | 2015-09-09 | 青岛启源振东电气有限公司 | Efficient concrete floor repair material |
| CN105948598A (en) * | 2016-06-27 | 2016-09-21 | 许偏奎 | Asphalt concrete |
| CN106186875A (en) * | 2016-07-12 | 2016-12-07 | 绍兴职业技术学院 | A kind of sponge urban water-through cement concrete pavement and manufacturing process thereof |
| CN106810138A (en) * | 2016-12-24 | 2017-06-09 | 安徽雷萨重工机械有限公司 | A kind of thermal-insulating type anti-crack and anti-seepage construction material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11209907A (en) * | 1998-01-28 | 1999-08-03 | Takashi Suzuki | Paving material and road paving method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891898A (en) * | 2015-05-16 | 2015-09-09 | 青岛启源振东电气有限公司 | Efficient concrete floor repair material |
| CN105948598A (en) * | 2016-06-27 | 2016-09-21 | 许偏奎 | Asphalt concrete |
| CN106186875A (en) * | 2016-07-12 | 2016-12-07 | 绍兴职业技术学院 | A kind of sponge urban water-through cement concrete pavement and manufacturing process thereof |
| CN106810138A (en) * | 2016-12-24 | 2017-06-09 | 安徽雷萨重工机械有限公司 | A kind of thermal-insulating type anti-crack and anti-seepage construction material |
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