CN112521086A - Impact-resistant wear-resistant airport pavement fiber concrete and preparation method thereof - Google Patents
Impact-resistant wear-resistant airport pavement fiber concrete and preparation method thereof Download PDFInfo
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- CN112521086A CN112521086A CN202011413430.8A CN202011413430A CN112521086A CN 112521086 A CN112521086 A CN 112521086A CN 202011413430 A CN202011413430 A CN 202011413430A CN 112521086 A CN112521086 A CN 112521086A
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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
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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
- 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
- C04B2111/2038—Resistance against physical degradation
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant 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)
- Road Paving Structures (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to an impact-resistant wear-resistant airport pavement fiber concrete and a preparation method thereof, wherein the impact-resistant wear-resistant airport pavement fiber concrete comprises the following raw materials in parts by weight: 300-390 parts of cement, 50-140 parts of fly ash, 30-60 parts of limestone powder, 600-850 parts of sand, 1000-1300 parts of broken stone, 120-210 parts of water, 0.5-6.5 parts of polyvinyl alcohol fiber and 3-10 parts of an additive. The impact-resistant wear-resistant fiber concrete prepared by the invention obviously improves the early crack resistance, the impact resistance and the wear resistance of the concrete by adding the polyvinyl alcohol fiber and the stone powder. The fiber concrete prepared by the invention has simple preparation process and good bonding property with cement base, obviously improves the shock resistance and wear resistance of the airport pavement concrete, and greatly prolongs the service life of the airport pavement.
Description
Technical Field
The invention relates to impact-resistant wear-resistant airfield pavement fiber concrete and a preparation method thereof, belonging to the technical field of building materials.
Background
With the rapid development of the aviation industry in China, airports need to bear heavy passenger transportation and freight transportation tasks, and the most important road surface structure form applied to civil aviation airports in China is a concrete road surface. However, since the concrete material is a brittle material, when the concrete material is subjected to a large impact during take-off and landing of an airplane and strong friction between wheels and an airport pavement, cracks are easily generated on the concrete pavement, so that the durability is reduced, and the service life is greatly shortened. Therefore, the problem is improved to a certain extent by adding fiber materials into concrete to improve the brittleness, and increase the crack resistance and the impact resistance.
The publication number CN201010260437 uses steel fibers to improve the tensile strength, the breaking strength, the impact resistance and the shrinkage cracking resistance of the concrete pavement, but the steel fibers exposed on the surface of the steel fiber concrete after the surface layer is worn can cause damage to the airplane tire, so the application in the airport pavement is still to be verified.
Disclosure of Invention
The invention aims to provide impact-resistant wear-resistant airfield pavement fiber concrete and a preparation method thereof. The anti-cracking performance and the impact resistance are improved by adding the high-performance polyvinyl alcohol fiber to prevent the crack of the concrete from expanding, and the wear resistance is improved by adding the stone powder to improve the compactness of the concrete.
In order to achieve the purpose, the invention adopts the following technical scheme:
the impact-resistant wear-resistant airfield pavement fiber concrete comprises the following components in parts by weight: 230-390 parts of cement, 50-140 parts of fly ash, 30-60 parts of stone powder, 600-850 parts of sand, 1000-1300 parts of broken stone, 120-210 parts of water, 0.5-6.5 parts of fiber and 3-10 parts of an additive.
Furthermore, the sand is one or a combination of more of river sand, machine-made sand and quartz sand, and the fineness modulus of the sand is 2.4-2.8.
Further, the fibers are polyvinyl alcohol fibers.
Furthermore, the length of the polyvinyl alcohol fiber is 10-35 mm, the diameter is 40 +/-5 microns, the elastic modulus is 40GPa, the ultimate elongation is 6-8%, and the tensile strength is more than or equal to 1650 MPa.
Furthermore, the volume ratio of the polyvinyl alcohol fiber in the fiber concrete is 0.04-0.5%.
Further, the stone powder is one or a combination of limestone powder and basalt stone powder.
The preparation method of the impact-resistant wear-resistant airport pavement fiber concrete comprises the following steps:
1) after weighing the raw materials in proportion, premixing the sand, the broken stone and the polyvinyl alcohol fiber for 30-60 s;
2) then adding cement, fly ash and stone powder, and dry-mixing for 60-120 s to uniformly mix the fibers, the powder and the aggregates;
3) and finally, fully mixing the water reducing agent and water, adding the mixture into a stirrer, and continuously stirring for 100-200 seconds to obtain the finished product of the polyvinyl alcohol fiber concrete.
Compared with the prior art, the invention has the beneficial effects that:
the concrete is doped with the polyvinyl alcohol fibers with high strength and high toughness, the early-stage crack resistance and the later-stage impact resistance of the concrete are obviously improved by utilizing the strong impact energy absorption capacity of the polyvinyl alcohol fibers, and the wear resistance of the concrete is improved by optimizing the mixing proportion and doping stone powder. The fiber concrete prepared by the invention can greatly improve the durability and the service life of the airport pavement, and has obvious application value.
Because the tensile strength of the polyvinyl alcohol fiber is far greater than that of the concrete matrix, the damage of the polyvinyl alcohol fiber in the concrete is mostly pulling out damage. The invention can reduce the pulling damage of the fiber by controlling the length of the polyvinyl alcohol fiber to be about 20mm and the mixing amount to be about 0.3 percent of volume fraction. Even if the fiber is pulled out, a large amount of hydration products are attached to the surface of the fiber, which indicates that the polyvinyl alcohol fiber is well bonded with the concrete matrix. The adhesive force of the polyvinyl alcohol fiber in the concrete is obviously improved, so that the tensile capacity of the concrete is greatly enhanced when the concrete is loaded.
Detailed Description
The technical solution of the present invention is further described in detail by the following examples, which are illustrative but not limiting of the present invention.
Example 1
The impact-resistant wear-resistant airfield pavement fiber concrete comprises the following raw materials in parts by weight: 310 parts of P.O 42.5 general portland cement, 30 parts of limestone powder, 20 parts of fly ash, 700 parts of machine-made sand, 1300 parts of crushed stone, 130 parts of water, 4 parts of polyvinyl alcohol fiber and 6 parts of an additive. The additive is a high-efficiency polycarboxylic acid water reducing agent.
Wherein the length of the polyvinyl alcohol fiber is 15mm, the diameter is 40 μm, and the volume percentage of the polyvinyl alcohol fiber in the fiber concrete is 0.3%.
Firstly, weighing raw materials in proportion, and premixing sand, gravel and polyvinyl alcohol fiber for 50 s; then adding cement, fly ash and limestone powder, and dry-mixing for 110s to uniformly mix the fibers, the powder and the aggregates; and finally, fully mixing the water reducing agent and water, adding the mixture into a stirrer, and continuously stirring for 120s to obtain the finished product of the polyvinyl alcohol fiber concrete. And (3) carrying out standard maintenance after the mold is filled and molded, taking out a 150X 150mm test piece after the test piece reaches the age, carrying out a wear-resisting test, and taking out a phi 150X 64(mm) test piece after the test piece reaches the age, carrying out an impact-resisting test.
Example 2
The impact-resistant wear-resistant airfield pavement fiber concrete comprises the following raw materials in parts by weight: 310 parts of P.O 42.5 general portland cement, 30 parts of limestone powder, 20 parts of fly ash, 700 parts of machine-made sand, 1300 parts of crushed stone, 130 parts of water, 4 parts of polyvinyl alcohol fiber (PVA) and 6 parts of an additive. The additive is a high-efficiency polycarboxylic acid water reducing agent.
Wherein the length of the polyvinyl alcohol fiber is 20mm, the diameter is 40 μm, and the volume percentage of the polyvinyl alcohol fiber in the fiber concrete is 0.3%.
Firstly, weighing raw materials in proportion, and premixing sand, broken stone and polyvinyl alcohol fiber for 40 s; then adding cement, fly ash and limestone powder, and dry-mixing for 100s to uniformly mix the fibers, the powder and the aggregates; and finally, fully mixing the water reducing agent and water, adding the mixture into a stirrer, and continuously stirring for 110 seconds to obtain the finished product of the polyvinyl alcohol fiber concrete. And (3) carrying out standard maintenance after the mold is filled and molded, taking out a 150X 150mm test piece after the test piece reaches the age, carrying out a wear-resisting test, and taking out a phi 150X 64(mm) test piece after the test piece reaches the age, carrying out an impact-resisting test.
Example 3
The impact-resistant wear-resistant airfield pavement fiber concrete comprises the following raw materials in parts by weight: 310 parts of P.O 42.5 general portland cement, 30 parts of limestone powder, 20 parts of fly ash, 700 parts of machine-made sand, 1300 parts of crushed stone, 130 parts of water, 6 parts of polyvinyl alcohol fiber (PVA) and 6 parts of an additive. The additive is a high-efficiency polycarboxylic acid water reducing agent.
Wherein the length of the polyvinyl alcohol fiber is 20mm, the diameter is 40 μm, and the volume percentage of the polyvinyl alcohol fiber in the fiber concrete is 0.45%.
Firstly, weighing raw materials in proportion, and premixing sand, broken stone and polyvinyl alcohol fiber for 30 s; then adding cement, fly ash and limestone powder, and dry-mixing for 90s to uniformly mix the fibers, the powder and the aggregates; and finally, fully mixing the water reducing agent and water, adding the mixture into a stirrer, and continuously stirring for 100 seconds to obtain the finished product of the polyvinyl alcohol fiber concrete. And (3) carrying out standard maintenance after the mold is filled and molded, taking out a 150X 150mm test piece after the test piece reaches the age, carrying out a wear-resisting test, and taking out a phi 150X 64(mm) test piece after the test piece reaches the age, carrying out an impact-resisting test.
Comparative example
The impact-resistant and mill-resistant pavement concrete comprises the following raw materials in parts by weight: 310 parts of P.O 42.5 general portland cement, 30 parts of limestone, 20 parts of fly ash, 700 parts of machine-made sand, 1300 parts of crushed stone, 130 parts of water and 6 parts of additive. The additive is a high-efficiency polycarboxylic acid water reducing agent.
And sequentially adding the sand, the broken stone, the cement and the fly ash into a stirrer, stirring for 30s, fully mixing the water reducing agent and the water, and adding the mixture into the stirrer to stir for 120 s. And (4) standard maintenance is carried out after the die filling and forming, and the 150X 150mm test piece is taken out for a wear-resisting test after the test piece reaches the age. The test piece of phi 150 multiplied by 64(mm) is taken out after the age period is reached for impact resistance test.
The early anti-cracking test is carried out according to GB/T50082-2009 standard test method for long-term performance and durability of common concrete, and the surface wind speed of a concrete test piece is 5m/s during the test.
The abrasion resistance test was carried out according to JTG E30-2005 test Specification for road engineering Cement and Cement concrete.
The impact resistance test was carried out according to GB/T21120-2018 synthetic fibers for cement concrete and mortar.
TABLE 1 tables of results of the early crack resistance tests of examples 1 to 3 and the control
As can be seen from the above data, the anti-crack effect is best when the length of the hybrid fiber is 20mm and the content is 0.3% in example 2. The length of the doped fiber in the example 1 is 15mm, and when the doping amount is 0.3%, the total cracking area of the concrete per unit area is increased by 23 percent compared with that in the example 2; the length of the doped fiber in the example 3 is 20mm, and when the doping amount is 0.45%, the total cracking area of the concrete per unit area is increased by 65% compared with that in the example 2; when no fiber was added, the total cracked area per unit area of the concrete increased 633% over that of example 2. The reason analysis is that the anti-cracking performance of the concrete can be obviously improved when the fiber mixing amount is in a reasonable range, but when the mixing amount is too large, the fibers are easy to agglomerate and uneven, the workability of the concrete is reduced, the sedimentation is uneven during forming, and cracks are generated.
TABLE 2 table of the results of testing impact resistance and abrasion resistance of examples 1 to 3 and the comparative sample
| Number of initial crack impacts | Number of final crack impacts | Abrasion loss/kg/m2 | |
| Example 1 | 51 | 53 | 2.37 |
| Example 2 | 55 | 58 | 2.33 |
| Example 3 | 44 | 47 | 2.56 |
| Comparative example | 22 | 25 | 3.44 |
As can be seen from the data in the above table, the impact numbers of examples 1 to 3 are significantly greater than those of the comparative examples, and the increase rate of the impact numbers reaches at least 100%, wherein the impact numbers of example 2 are the largest. However, in example 3, the impact resistance times are reduced by further increasing the fiber volume fraction, and the reason is analyzed that the incorporation of the polyvinyl alcohol fibers improves the cohesive force in the concrete and obviously increases the impact resistance of the concrete, but the increase of the fiber incorporation increases the specific surface area of the fibers, so that more cement is required to bond the fibers, weak interfaces between the fibers and the concrete matrix are increased, and the impact resistance strength is reduced. Meanwhile, the abrasion loss of examples 1 to 3 was also reduced relative to the control. The reason for this is that the fine aggregate filling effect of the limestone powder makes the concrete surface more compact, and the wear resistance of the concrete is increased to a certain extent. Namely, the fiber concrete of the invention has good early crack resistance, shock resistance and wear resistance, and has obvious progress compared with the prior art.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (7)
1. The impact-resistant wear-resistant airfield pavement fiber concrete is characterized by comprising the following components in parts by weight: 230-390 parts of cement, 50-140 parts of fly ash, 30-60 parts of stone powder, 600-850 parts of sand, 1000-1300 parts of broken stone, 120-210 parts of water, 0.5-6.5 parts of fiber and 3-10 parts of an additive.
2. The impact-resistant and wear-resistant airfield pavement fiber concrete according to claim 1, wherein the sand is one or a combination of river sand, machine-made sand and quartz sand, and the fineness modulus of the medium sand is 2.4-2.8.
3. The impact and abrasion resistant airfield pavement fiber concrete of claim 1, wherein the fibers are polyvinyl alcohol fibers.
4. The impact-resistant wear-resistant airfield pavement fiber concrete according to claim 3, wherein the length of the polyvinyl alcohol fiber is 10-35 mm, the diameter is 40 +/-5 μm, the elastic modulus is 40GPa, the ultimate elongation is 6-8%, and the tensile strength is not less than 1650 MPa.
5. The impact-resistant and wear-resistant airport pavement fiber concrete according to claim 1, wherein the polyvinyl alcohol fiber accounts for 0.04-0.5% of the fiber concrete by volume.
6. The impact-resistant and wear-resistant airport pavement fiber concrete according to claim 1, wherein the stone powder is one or a combination of limestone powder and basalt stone powder.
7. The method for preparing the impact-resistant and wear-resistant airport pavement fiber concrete according to any one of claims 1 to 6, comprising the following steps:
1) after weighing the raw materials in proportion, premixing the sand, the broken stone and the polyvinyl alcohol fiber for 30-60 s;
2) then adding cement, fly ash and stone powder, and dry-mixing for 60-120 s to uniformly mix the fibers, the powder and the aggregates;
3) and finally, fully mixing the water reducing agent and water, adding the mixture into a stirrer, and continuously stirring for 100-200 seconds to obtain the finished product of the polyvinyl alcohol fiber concrete.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115974468A (en) * | 2022-10-25 | 2023-04-18 | 中铁二十四局集团安徽工程有限公司 | High-performance concrete for airport runway and preparation method thereof |
| CN116462461A (en) * | 2023-03-15 | 2023-07-21 | 华北水利水电大学 | Sprayable side slope impact-resistant flexible protective concrete |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050018744A (en) * | 2004-06-23 | 2005-02-28 | 김재환 | Manufactuering method of hybrid types of ductile fiber reinforced cementitious composites reinforced with micro and macro fibers |
| CN101182700A (en) * | 2006-11-14 | 2008-05-21 | 深圳市海川实业股份有限公司 | Synthetic fiber cement concrete road surface replacing steel fibre |
| CN105174763A (en) * | 2015-10-22 | 2015-12-23 | 北京工业大学 | Environment-friendly regenerated synthetic fiber reinforced concrete used for pavements, bridge decks and industrial terraces |
| CN107117912A (en) * | 2017-05-08 | 2017-09-01 | 北京工业大学 | Fiber concrete, preparation and application that a kind of airfield pavement is quickly repaired |
| CN107285714A (en) * | 2017-07-31 | 2017-10-24 | 北京中震建筑科学研究院有限公司 | A kind of high ductility vinal concrete and preparation method thereof |
| CN109320163A (en) * | 2018-10-30 | 2019-02-12 | 中建西部建设西南有限公司 | Low glue material self-compacting concrete of a kind of C30 and preparation method thereof |
| CN111233402A (en) * | 2020-03-04 | 2020-06-05 | 中建西部建设湖南有限公司 | Anti-cracking facing layer of cement concrete member and preparation method thereof |
| CN111675523A (en) * | 2020-06-22 | 2020-09-18 | 上海美创建筑材料有限公司 | Special concrete material and preparation method and application thereof |
-
2020
- 2020-12-05 CN CN202011413430.8A patent/CN112521086A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050018744A (en) * | 2004-06-23 | 2005-02-28 | 김재환 | Manufactuering method of hybrid types of ductile fiber reinforced cementitious composites reinforced with micro and macro fibers |
| CN101182700A (en) * | 2006-11-14 | 2008-05-21 | 深圳市海川实业股份有限公司 | Synthetic fiber cement concrete road surface replacing steel fibre |
| CN105174763A (en) * | 2015-10-22 | 2015-12-23 | 北京工业大学 | Environment-friendly regenerated synthetic fiber reinforced concrete used for pavements, bridge decks and industrial terraces |
| CN107117912A (en) * | 2017-05-08 | 2017-09-01 | 北京工业大学 | Fiber concrete, preparation and application that a kind of airfield pavement is quickly repaired |
| CN107285714A (en) * | 2017-07-31 | 2017-10-24 | 北京中震建筑科学研究院有限公司 | A kind of high ductility vinal concrete and preparation method thereof |
| CN109320163A (en) * | 2018-10-30 | 2019-02-12 | 中建西部建设西南有限公司 | Low glue material self-compacting concrete of a kind of C30 and preparation method thereof |
| CN111233402A (en) * | 2020-03-04 | 2020-06-05 | 中建西部建设湖南有限公司 | Anti-cracking facing layer of cement concrete member and preparation method thereof |
| CN111675523A (en) * | 2020-06-22 | 2020-09-18 | 上海美创建筑材料有限公司 | Special concrete material and preparation method and application thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115974468A (en) * | 2022-10-25 | 2023-04-18 | 中铁二十四局集团安徽工程有限公司 | High-performance concrete for airport runway and preparation method thereof |
| CN116462461A (en) * | 2023-03-15 | 2023-07-21 | 华北水利水电大学 | Sprayable side slope impact-resistant flexible protective concrete |
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