CN115340355A - High-ductility magnesium phosphate cement-based rapid repair material and preparation method thereof - Google Patents
High-ductility magnesium phosphate cement-based rapid repair material and preparation method thereof Download PDFInfo
- Publication number
- CN115340355A CN115340355A CN202211164350.2A CN202211164350A CN115340355A CN 115340355 A CN115340355 A CN 115340355A CN 202211164350 A CN202211164350 A CN 202211164350A CN 115340355 A CN115340355 A CN 115340355A
- Authority
- CN
- China
- Prior art keywords
- parts
- magnesium phosphate
- phosphate cement
- repair material
- rapid repair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—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 cold phosphate binders
- C04B28/344—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 cold phosphate binders the phosphate binder being present in the starting composition solely as one or more phosphates
-
- 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
- C04B2111/72—Repairing or restoring existing buildings or building materials
Landscapes
- 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 field of novel building materials, in particular to a high-ductility magnesium phosphate cement-based rapid repair material and a preparation method thereof; the quick repairing material comprises the following raw materials in parts by mass: 330 to 893 parts of magnesium oxide, 99 to 372 parts of ammonium dihydrogen phosphate, 82 to 360 parts of retarder, 124 to 744 parts of coal ash, 248 to 496 parts of fine aggregate, 153 to 440 parts of water and 13 to 26 parts of fiber; the high-ductility magnesium phosphate cement-based rapid repair material prepared by the invention integrates rapid hardening, high strength and high ductility, obviously overcomes the defects of poor tensile deformation capability and the like of common magnesium phosphate cement, can be used in the field of rapid repair of concrete pavement layers of road and bridge surfaces, reduces traffic blocking time, opens traffic as soon as possible, can avoid cracking risk caused by poor tensile deformation capability of the cement-based material of the road and bridge surfaces, and has outstanding technical, economic and environmental benefits.
Description
Technical Field
The invention relates to the field of novel building materials, in particular to a high-ductility magnesium phosphate cement-based rapid repair material and a preparation method thereof.
Background
The basic industry of highway and bridge in China is developed rapidly, and higher requirements are put forward on the working performance of the highway and bridge. Most of roads and bridges in China are paved by asphalt concrete, the asphalt concrete has poor tensile deformation capability, and the concrete road bridge surface can crack and damage to different degrees under the comprehensive action of temperature difference, vehicle load and the like. On one hand, harmful ions in rainwater seep into lower structures such as bridge reinforced concrete main beams and the like due to the occurrence of road and bridge surface defects, so that the service life of the bridge is influenced; on the other hand, the driving comfort and the appearance of the road and bridge deck are seriously affected. The cement-based composite material which integrates high ductility and rapid hardening and meets the strength grade requirement of a concrete road and bridge deck pavement layer is prepared, and is vital to opening traffic as soon as possible, reducing the cracking risk of the road and bridge deck, improving the passenger and cargo transportation benefit and even improving the service life of a bridge.
The high-ductility cement-based composite material is prepared by adding fibers into a cement-based composite material matrix, and regulating and controlling microscopic properties so that the ultimate elongation of the cement-based composite material is not less than 0.5% under uniaxial tensile property and the average crack width is not more than 200 mu m. Referring to the microcosmic design theory of the high-ductility cement-based composite material, the rapid-hardening matrix material is generated by acid-base neutralization reaction of magnesium oxide and phosphate, and then the high-ductility magnesium phosphate cement-based rapid repair material is prepared by doping fibers and is used for rapid repair of a concrete pavement layer of a road and bridge deck.
At present, the research of magnesium phosphate cement as a rapid repair material is mainly reflected in that the magnesium phosphate cement is rapid in hardness and early in strength, but has poor tensile deformation capability, and the magnesium phosphate cement is easy to crack due to the poor tensile deformation capability when being directly applied to the repair of pavement layers of roads and bridges, thereby treating the symptoms and not the root causes. The existing scholars prepare a phosphate cement-based super-tough low-temperature composite material (a phosphate cement-based super-tough low-temperature composite material and a preparation method thereof, CN 106927780) which can be used for rapidly repairing road and bridge surfaces, but the material does not relate to excellent tensile deformation capacity and cannot fundamentally solve the problem of cracking of road and bridge surface concrete caused by poor tensile deformation capacity. However, the curing age of the traditional high-ductility cement-based composite material is generally 28 days, the quick-hardening effect cannot be achieved, and the traditional high-ductility cement-based composite material cannot be used in the field of quick repair. Therefore, a composite material integrating rapid hardening and high ductility is urgently needed to be prepared, and a high-quality and high-efficiency solution is provided for rapid repair of a concrete pavement of a road and bridge deck.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a high-ductility magnesium phosphate cement-based rapid repair material and a preparation method thereof.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the high-ductility magnesium phosphate cement-based rapid repair material comprises the following raw materials in parts by mass: 330 to 893 parts of magnesium oxide, 99 to 372 parts of ammonium dihydrogen phosphate, 82 to 360 parts of retarder, 124 to 744 parts of fly ash, 248 to 496 parts of fine aggregate, 153 to 440 parts of water and 13 to 26 parts of fiber.
The method takes the magnesium phosphate cement as a matrix, is doped with fibers, performs multi-scale material performance optimization design from the micro-mechanics, micro-mechanics and macro-mechanics levels, enables the magnesium phosphate cement-based rapid repair material to meet the strength criterion and the energy criterion in the high ductility criterion through micro-performance regulation and control, and prepares the high ductility magnesium phosphate cement-based rapid repair material integrating the advantages of the magnesium phosphate cement and the high ductility cement-based composite material.
Further, the retarder is one or a compound of borax and boric acid.
Further, the grain diameter of the fine aggregate is 0.06-1.18 mm, and the fineness modulus is 1.21-1.72.
Preferably, the fine aggregate is one or a composite of river sand and quartz sand.
Furthermore, the fiber has the length of 6-12 mm, the diameter of 20-40 μm, the tensile strength of at least 1000MPa, the ultimate elongation of 8-12 percent and the elastic modulus of 28-35 Gpa.
Further, the fiber is one or more of polyvinyl alcohol fiber, polypropylene fiber and basalt fiber.
A preparation method of a high-ductility magnesium phosphate cement-based rapid repair material comprises the following steps:
1) The magnesium oxide, the ammonium dihydrogen phosphate, the retarder, the fly ash and the fine aggregate in parts by weight are stirred for 1 to 2 minutes in a stirring machine at the rotation speed of 140 revolutions per minute and the revolution speed of 62 revolutions per minute;
2) Adding water, and stirring for 3 to 4 minutes at the rotation speed of 285 rpm and the revolution speed of 125 rpm;
3) Adding fibers, stirring for 2-3 minutes at the autorotation speed of 285 rpm and the revolution speed of 125 rpm;
4) And (5) filling the mold, curing in the air for 6 to 12h, then removing the mold, and testing the mechanical property.
Further, the time for the processes from step 1) to step 3) in the above preparation method is 8 to 9 minutes in total.
Compared with the prior art, the invention has the following beneficial effects:
the main reason for the cracking of the concrete pavement layer of the road and bridge deck is the brittleness and poor tensile deformation capability of the concrete, and the common repairing material adopts the concrete with the same strength grade or higher strength grade for repairing, thereby treating the symptoms and not the root causes. The high-ductility magnesium phosphate cement-based rapid repair material can improve the tensile deformation capacity of the repair material and reduce the cracking risk, has the characteristic of rapid hardening, can reduce traffic obstruction, improve the quality of the repair material for the pavement layer of the road and bridge deck, reduce the maintenance frequency, prolong the service life of the bridge, improve the driving comfort level, and has remarkable social benefit and economic benefit.
Drawings
FIG. 1 is a uniaxial tensile stress-strain plot of the high ductility magnesium phosphate cement-based rapid repair material of example 1.
FIG. 2 is a graph of uniaxial tensile stress-strain curves for the high-ductility magnesium phosphate cement-based rapid repair material of example 2.
FIG. 3 is a graph of uniaxial tensile stress-strain curves for the high-ductility magnesium phosphate cement-based rapid repair material of example 3.
FIG. 4 is a uniaxial tensile stress-strain plot of the high ductility magnesium phosphate cement-based rapid repair material of example 4.
Detailed Description
The present invention is further illustrated by the following specific examples.
Example 1
The formulation ratio of the high-ductility magnesium phosphate cement-based rapid repair material is shown in table 1:
TABLE 1 materials mixing ratio (parts by mass)
The retarder used in the method is the compound doping of borax and boric acid, the fine aggregate is the compound doping of river sand and quartz sand, the maximum grain diameter is 0.06mm, the fineness modulus is 1.21, the fiber type is polyvinyl alcohol fiber, and the length is 12mm.
The preparation steps are as follows:
1) The magnesium oxide, ammonium dihydrogen phosphate, retarder (borax and boric acid), fly ash and fine aggregate (river sand and quartz sand) are stirred for 2 minutes at the autorotation speed of 140 revolutions per minute and the revolution speed of 62 revolutions per minute in a stirrer;
2) Adding water, stirring for 4 minutes at the rotation speed of 285 rpm and the revolution speed of 125 rpm;
3) Adding fibers, stirring for 2 minutes at the rotation speed of 285 rpm and the revolution speed of 125 rpm;
4) And (5) filling the mold, curing in air for 6 hours, and then removing the mold.
Example 2
The formulation ratio of the high-ductility magnesium phosphate cement-based rapid repair material is shown in table 2:
TABLE 2 materials mixing ratio (parts by mass)
The retarder is borax, the fine aggregate is river sand, the maximum particle size is 1.18mm, the fineness modulus is 1.72, the fiber type is basalt fiber, and the length is 8mm.
The preparation steps are as follows:
1) The rotation speed of the magnesia, the ammonium dihydrogen phosphate, the borax, the fly ash and the river sand in the stirrer is 140 revolutions per minute, and the revolution speed is 62 revolutions per minute, and the stirring is carried out for 1 minute;
2) Adding water, stirring for 4 minutes at the rotation speed of 285 rpm and the revolution speed of 125 rpm;
3) Adding fiber, stirring at 285 rpm and 125 rpm for 3 min;
4) And (5) filling the mold, curing in air for 12 hours, and then removing the mold.
Example 3
The formulation ratio of the high-ductility magnesium phosphate cement-based rapid repair material is shown in table 3:
TABLE 3 materials mixing ratio (parts by mass)
The retarder is borax, the fine aggregate is quartz sand, the grain diameter is 0.06-1.18mm, the fineness modulus is 1.51, the fiber type is polyvinyl alcohol fiber and basalt fiber complex doping, and the length of the two fibers is 12mm.
The preparation steps are as follows:
1) The rotation speed of the magnesium oxide, ammonium dihydrogen phosphate, borax, fly ash and quartz sand in a stirrer is 140 revolutions per minute, and the revolution speed is 62 revolutions per minute, and the stirring is carried out for 2 minutes;
2) Adding water, and stirring for 4 minutes at the rotation speed of 285 rpm and the revolution speed of 125 rpm;
3) Adding fiber, stirring at 285 rpm and 125 rpm for 3 min;
4) Filling the mold, curing in air for 10h, and removing the mold
Example 4
The formulation ratio of the high-ductility magnesium phosphate cement-based rapid repair material is shown in table 4:
TABLE 4 materials mixing ratio (parts by mass)
The retarder is boric acid, the fine aggregate is river sand, the maximum particle size is 0.06mm, the fineness modulus is 1.30, the fiber type is polypropylene fiber, and the length is 6mm.
The preparation steps are as follows:
1) The rotation speed of the magnesium oxide, the ammonium dihydrogen phosphate, the boric acid, the fly ash and the river sand in the stirrer is 140 revolutions per minute, and the revolution speed is 62 revolutions per minute, and the stirring is carried out for 2 minutes;
2) Adding water, and stirring for 3 minutes at the rotation speed of 285 rpm and the revolution speed of 125 rpm;
3) Adding fiber, stirring at 285 rpm and 125 rpm for 3 min;
4) And (5) filling the mold, curing in air for 12 hours, and then removing the mold.
The uniaxial tensile test is carried out on the medium-high-ductility magnesium phosphate cement-based rapid repair material prepared in the embodiment 1-4, and the result shows that the ultimate elongation of the high-ductility magnesium phosphate cement-based rapid repair material is 0.50% -0.85%, which is far greater than the tensile strain of a common concrete material, and compared with a common concrete brittle material, the tensile deformation capacity of the repair material can be improved by adopting the high-ductility magnesium phosphate cement-based rapid repair material. The high-ductility magnesium phosphate cement-based rapid repair material in the embodiments 1-4 has excellent deformability after being cured for 6h to 12h, can be used for repairing road and bridge surfaces, and has remarkable rapid hardening characteristic compared with the traditional high-ductility cement-based composite material with the curing age of 28d, thereby being beneficial to reducing the traffic blocking time of road and bridge surfaces and improving the passenger transport efficiency.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be made by those skilled in the art without inventive work within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (8)
1. The high-ductility magnesium phosphate cement-based rapid repair material is characterized by comprising the following raw materials in parts by mass: 330 to 893 parts of magnesium oxide, 99 to 372 parts of ammonium dihydrogen phosphate, 82 to 360 parts of retarder, 124 to 744 parts of fly ash, 248 to 496 parts of fine aggregate, 153 to 440 parts of water and 13 to 26 parts of fiber.
2. The high-ductility magnesium phosphate cement-based rapid repair material as claimed in claim 1, wherein the retarder is one or a combination of borax and boric acid.
3. The high-ductility magnesium phosphate cement-based rapid repair material as claimed in claim 1, wherein the fine aggregate has a particle size of 0.06-1.18 mm and a fineness modulus of 1.21-1.72.
4. The high-ductility magnesium phosphate cement-based rapid repair material as claimed in claim 3, wherein said fine aggregate is one or a composite of river sand and quartz sand.
5. The high-ductility magnesium phosphate cement-based rapid repair material as claimed in claim 1, wherein the fiber length is 6-12 mm, the diameter is 20-40 μm, the tensile strength is at least 1000MPa, the ultimate elongation is 8-12%, and the elastic modulus is 28-35 GPa.
6. The high-ductility magnesium phosphate cement-based rapid repair material as claimed in claim 5, wherein said fibers are one or more of polyvinyl alcohol fibers, polypropylene fibers and basalt fibers.
7. The method for preparing the high-ductility magnesium phosphate cement-based rapid repair material as claimed in claim 1, characterized by comprising the following steps:
1) The magnesium oxide, the ammonium dihydrogen phosphate, the retarder, the fly ash and the fine aggregate in parts by weight are stirred in a stirrer for 1 to 2 minutes at the rotation speed of 140 revolutions per minute and the revolution speed of 62 revolutions per minute;
2) Adding water, and stirring for 3-4 minutes at the rotation speed of 285 rpm and the revolution speed of 125 rpm;
3) Adding fibers, and stirring for 2 to 3 minutes at the rotation speed of 285 rpm and the revolution speed of 125 rpm;
4) And (5) filling a mold, curing in air for 6 to 12h, removing the mold, and testing the mechanical property.
8. The method for preparing the high-ductility magnesium phosphate cement-based rapid repair material as claimed in claim 1, wherein the time for the processes from step 1) to step 3) is 8 to 9 minutes in total.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211164350.2A CN115340355A (en) | 2022-09-23 | 2022-09-23 | High-ductility magnesium phosphate cement-based rapid repair material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211164350.2A CN115340355A (en) | 2022-09-23 | 2022-09-23 | High-ductility magnesium phosphate cement-based rapid repair material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115340355A true CN115340355A (en) | 2022-11-15 |
Family
ID=83956351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211164350.2A Pending CN115340355A (en) | 2022-09-23 | 2022-09-23 | High-ductility magnesium phosphate cement-based rapid repair material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115340355A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014079252A1 (en) * | 2012-11-26 | 2014-05-30 | Chen Huisu | Retarder suitable for quick setting and rapid hardening magnesium phosphate cement system and methods of use thereof |
| CN105272138A (en) * | 2015-10-10 | 2016-01-27 | 同济大学 | Magnesium phosphate cement based rapid repair mortar and preparation method thereof |
| CN106966687A (en) * | 2017-04-07 | 2017-07-21 | 俞家欢 | One kind is without strong cohesive force phosphate cement patching material of mobility rapid hardening and preparation method thereof |
| CN107056225A (en) * | 2017-04-12 | 2017-08-18 | 武汉理工大学 | A kind of phosphate cement based patching material and preparation method thereof |
| CN108455963A (en) * | 2018-05-07 | 2018-08-28 | 苏州麦奇新型材料有限公司 | A kind of magnesium phosphate cement base pavement patching material and preparation method thereof |
| CN110803912A (en) * | 2019-11-28 | 2020-02-18 | 郑州大学 | Magnesium phosphate cement-based fiber composite material and preparation method thereof |
-
2022
- 2022-09-23 CN CN202211164350.2A patent/CN115340355A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014079252A1 (en) * | 2012-11-26 | 2014-05-30 | Chen Huisu | Retarder suitable for quick setting and rapid hardening magnesium phosphate cement system and methods of use thereof |
| CN105272138A (en) * | 2015-10-10 | 2016-01-27 | 同济大学 | Magnesium phosphate cement based rapid repair mortar and preparation method thereof |
| CN106966687A (en) * | 2017-04-07 | 2017-07-21 | 俞家欢 | One kind is without strong cohesive force phosphate cement patching material of mobility rapid hardening and preparation method thereof |
| CN107056225A (en) * | 2017-04-12 | 2017-08-18 | 武汉理工大学 | A kind of phosphate cement based patching material and preparation method thereof |
| CN108455963A (en) * | 2018-05-07 | 2018-08-28 | 苏州麦奇新型材料有限公司 | A kind of magnesium phosphate cement base pavement patching material and preparation method thereof |
| CN110803912A (en) * | 2019-11-28 | 2020-02-18 | 郑州大学 | Magnesium phosphate cement-based fiber composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张亚梅等: "《土木工程材料》", 南京东南大学出版社, pages: 209 - 210 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107445545B (en) | High-ductility cement-based composite material for repairing hydraulic concrete structure | |
| CN102557555A (en) | Mineral fiber-modified flexible rubber concrete | |
| CN108558304A (en) | A kind of high antiskid long-life ultra-high performance concrete road surface road | |
| CN1834050A (en) | Plastic anti-crack modified fiber of cement-based material and prepn. process | |
| CN1179902C (en) | Patching material in quick modified polymer | |
| CN111439977A (en) | Impact-resistant basalt fiber reinforced concrete and preparation method thereof | |
| CN111574164A (en) | Rapid repairing material for super-early-strength shrinkage compensation road bridge and preparation method thereof | |
| CN105585294B (en) | A kind of high cracking resistance high tenacity airport pavement concrete of assorted fibre and preparation method | |
| CN110577383A (en) | Super-retarding concrete | |
| CN111196702A (en) | Polypropylene fiber modified cement stabilized macadam and preparation method thereof | |
| CN113402236A (en) | Cement concrete pavement repairing material, preparation process and pavement repairing method | |
| CN113480271B (en) | Concrete pavement repairing material | |
| CN101337792A (en) | Repairing agent for cement concrete bridge deck thin layer | |
| Ismail et al. | The effects of steel fibers extracted from waste tyre on concrete containing palm oil fuel ash | |
| CN111704421B (en) | Cement pavement thin layer repairing material and using method thereof | |
| CN113929409A (en) | Ultrahigh-performance concrete based on composite cementitious material system | |
| CN117645451A (en) | Fiber-toughened anti-cracking cement stabilized macadam and preparation method and construction method thereof | |
| CN115340355A (en) | High-ductility magnesium phosphate cement-based rapid repair material and preparation method thereof | |
| CN112456906A (en) | Application of silicon carbide whiskers in preparation of wear-resistant toughened anti-crack cement-based material | |
| CN112521086A (en) | Impact-resistant wear-resistant airport pavement fiber concrete and preparation method thereof | |
| CN115448647A (en) | High-ductility regenerated powder geopolymer-based reinforced repair material and preparation method thereof | |
| CN114890746A (en) | Steel-STC light combined structure bridge deck pavement material, bridge deck and steam-curing-free construction process thereof | |
| CN113354374A (en) | High-toughness quick-setting repair mortar and preparation method thereof | |
| CN115745536B (en) | Ecological high-ductility cement-based rapid repair material prepared from calcined gangue powder and method | |
| Yao et al. | Pressure bleeding rate and crack resistance of high-strength concrete with good fluidity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |