CN115353353A - High-ductility concrete precast slab and preparation method thereof - Google Patents
High-ductility concrete precast slab and preparation method thereof Download PDFInfo
- Publication number
- CN115353353A CN115353353A CN202211116682.3A CN202211116682A CN115353353A CN 115353353 A CN115353353 A CN 115353353A CN 202211116682 A CN202211116682 A CN 202211116682A CN 115353353 A CN115353353 A CN 115353353A
- Authority
- CN
- China
- Prior art keywords
- parts
- portions
- precast slab
- concrete
- ductility concrete
- 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
- 239000004567 concrete Substances 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000000835 fiber Substances 0.000 claims abstract description 52
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000004568 cement Substances 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000010881 fly ash Substances 0.000 claims abstract description 16
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 15
- 239000006004 Quartz sand Substances 0.000 claims abstract description 14
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 13
- 239000002893 slag Substances 0.000 claims abstract description 12
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 6
- 239000011178 precast concrete Substances 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 13
- 239000005543 nano-size silicon particle Substances 0.000 claims description 8
- 235000012239 silicon dioxide Nutrition 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 4
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 229920005646 polycarboxylate Polymers 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 6
- 238000005054 agglomeration Methods 0.000 abstract description 3
- 230000002776 aggregation Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 18
- 230000000694 effects Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 235000010489 acacia gum Nutrition 0.000 description 2
- 239000001785 acacia senegal l. willd gum Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
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
- C04B28/02—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
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
-
- 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
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 discloses a high-ductility concrete precast slab and a preparation method thereof, belonging to the technical field of concrete materials. The high-ductility concrete precast slab comprises the following raw materials in parts by weight: 100 to 120 portions of cement, 6 to 22 portions of ultrafine fly ash, 2 to 10 portions of slag, 15 to 20 portions of silica fume, 100 to 150 portions of quartz sand, 3 to 5 portions of nano-silica, 2 to 5 portions of water reducing agent and 10 to 15 portions of modified fiber. The invention modifies the easy-to-agglomerate fiber, thereby avoiding the problem of agglomeration of the fiber in concrete, keeping the fluidity of the concrete for preparing the precast slab at about 200mm, ensuring that the ultimate tensile strength of the precast slab reaches 17.8MPa and the tensile elongation reaches 9.6 percent, and further reducing the problem that the precast slab is easy to crack or even break when in use.
Description
Technical Field
The invention relates to the technical field of concrete materials, in particular to a high-ductility concrete precast slab and a preparation method thereof.
Background
Precast slabs are floor slabs used in buildings in the early 20 th century, and are modules or slabs used in engineering. Because the concrete prefabricated member is produced and processed in a prefabricating field and is directly transported to a construction site for installation, the prefabricated member is called a prefabricated plate. When the prefabricated slab is manufactured, a hollow model is firstly nailed by wood plates, reinforcing steel bars are distributed at the hollow part of the model, cement is used for filling the hollow part, after the hollow part is dried, the wood plates are knocked off, and the prefabricated slab is remained. Precast slabs are used in many applications in construction, such as cement slabs covered in ditches beside highways; the cement boards used as heat insulation layers on the roof are prefabricated boards.
The general industrialization degree of prefabricated plate is higher, but reuse after forming die and production facility once only drop into, and the consumptive material is few, resources are saved and expense, and the prefabricated plate sets up accurate preparation according to machinery, compares in the requirement greatly reduced of on-the-spot watering to constructor, saves personnel's cost, is used for the building of building such as modern high-rise building and bridge more. However, the existing concrete precast slab has the disadvantages of low bending strength, high brittleness and the like, so that the concrete precast slab is easy to crack or even break in use, thereby seriously affecting the overall safety and the service life of a building.
Disclosure of Invention
The present invention is directed to a high-ductility concrete precast slab and a method for manufacturing the same, which solve the above-mentioned problems of the prior art.
In order to achieve the purpose, the invention provides the following scheme:
one of the technical schemes of the invention is as follows: a high-ductility concrete precast slab comprises the following raw materials in parts by weight: 100 to 120 portions of cement, 6 to 22 portions of ultrafine fly ash, 2 to 10 portions of slag, 15 to 20 portions of silica fume, 100 to 150 portions of quartz sand, 3 to 5 portions of nano-silica, 2 to 5 portions of water reducing agent and 10 to 15 portions of modified fiber.
Further, the high-ductility concrete precast slab comprises the following raw materials in parts by weight: 100 parts of cement, 10 parts of ultrafine fly ash, 6 parts of slag, 15 parts of silica fume, 100 parts of quartz sand, 4 parts of nano silicon dioxide, 3 parts of water reducing agent and 12 parts of modified fiber.
Further, the cement is portland cement; the particle size of the ultrafine fly ash is 2-4 mu m; the particle size of the slag is 1-3 mm.
Further, the particle size of the silica fume is 0.1-0.2 μm; siO in the quartz sand 2 The content of the compound is more than or equal to 98 percent; the particle size of the quartz sand is 1-1.5 mm.
Further, the particle size of the nano silicon dioxide is 20-30 nm; the water reducing agent is polycarboxylate water reducing agent.
Further, the preparation of the modified fiber specifically comprises: and (3) soaking the fiber in a gum solution, and drying to obtain the modified fiber.
Further, the fibers comprise ultra-high molecular weight polyethylene fibers or carbon fibers; the mass fraction of the fiber in the modified fiber is 55-65%.
The second technical scheme of the invention is as follows: the preparation method of the high-ductility concrete precast slab comprises the following steps:
(1) Mixing the raw materials except the modified fiber, adding water until the water-cement ratio is 4.2-4.5, uniformly stirring, slowly adding the modified fiber, and stirring for 3-5 min to obtain precast concrete;
(2) Pouring and demolding: and spraying a release agent on the surface of the mould, pouring the precast concrete into the mould, vibrating to compact, leveling the surface, covering a cover plate, then carrying out steam curing, standing and demoulding after curing is finished, and thus obtaining the high-ductility concrete precast slab.
Further, the stirring speed is 500-700 min; the steam curing temperature is 90-92 ℃, and the curing time is 6-8 h.
The high speed stirring action can improve the dispersibility of the fiber in the concrete.
The bonding between the fiber and the matrix can be enhanced through steam curing, so that the toughness of the concrete can be obviously improved, and the flexural strength and the compressive strength of the concrete are greatly improved.
The invention discloses the following technical effects:
(1) The invention comprehensively utilizes the high volcanic ash activity of the nano-silica, the ball effect and the high rheological property of the ultrafine fly ash, and improves the flowing property of the concrete for the precast slab.
(2) According to the invention, the modified fiber is added into the concrete precast slab, so that the concrete precast slab has high ductility (high ultimate tensile strength and high tensile elongation) and the anti-damage capability is improved.
(3) The invention modifies the easy-to-agglomerate fiber, thereby avoiding the problem of agglomeration of the fiber in concrete, keeping the fluidity of the concrete for preparing the precast slab at about 200mm, ensuring the ultimate tensile strength of the precast concrete slab to reach 17.8MPa and the tensile elongation to reach 9.6 percent, and further reducing the problem that the precast slab is easy to crack and even break in use.
(4) The concrete precast slab has the advantages of simple process, low cost, convenient and fast construction flexibility, and can be prefabricated in an industrial manner and is convenient for quality control.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, for numerical ranges in the present disclosure, it is understood that each intervening value, to the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in that stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated herein by reference to disclose and describe the methods and/or materials in connection with which the documents are cited. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The specification and examples are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
The "parts" described in the following examples are all "parts by weight".
Example 1
A preparation method of a high-ductility concrete precast slab comprises the following steps:
the high-ductility concrete precast slab comprises the following raw materials in parts by weight: 100 parts of cement, 10 parts of ultrafine fly ash, 6 parts of slag, 15 parts of silica fume, 100 parts of quartz sand, 4 parts of nano silicon dioxide, 3 parts of water reducing agent and 12 parts of modified fiber.
The cement is ordinary portland cement (P.O42.5);
the particle size of the ultrafine fly ash is 2-4 mu m;
the grain diameter of the slag is 1-3 mm;
the particle size of the silica fume is 0.1-0.2 μm;
SiO in quartz sand 2 The content of the nano-particles is more than or equal to 98 percent, and the particle size is 1-1.5 mm;
the grain diameter of the nano silicon dioxide is 22-24 nm;
the water reducing agent is polycarboxylate water reducing agent.
The preparation method of the modified fiber comprises the following steps: adding Arabic gum into hot water at 80 ℃ for dissolving (the mass ratio of the Arabic gum to the hot water is 1.
The preparation method comprises the following steps:
(1) Mixing the raw materials except the modified fiber, adding water until the water-cement ratio is 4.3, uniformly stirring, slowly adding the modified fiber for 5 times under the stirring state, and then stirring at a high speed of 600r/min for 4min to obtain precast concrete;
(2) Pouring and demolding: spraying a release agent on the surface of a mould (with the thickness of 12 cm)), pouring the precast concrete into the mould, vibrating to compact, leveling the surface, covering a cover plate, curing by using steam at 90 ℃ for 8h, standing for 8h after curing, and demoulding to obtain the high-ductility concrete precast slab.
Example 2
The precast slab is the same as example 1, except that the precast slab is composed of the following raw materials in parts by weight: 110 parts of cement, 6 parts of ultrafine fly ash, 10 parts of slag, 15 parts of silica fume, 120 parts of quartz sand, 3 parts of nano silicon dioxide, 2 parts of water reducing agent and 10 parts of modified fiber.
Example 3
The precast slab is the same as example 1, except that the precast slab is composed of the following raw materials in parts by weight: 120 parts of cement, 22 parts of ultrafine fly ash, 2 parts of slag, 20 parts of silica fume, 150 parts of quartz sand, 5 parts of nano silicon dioxide, 4 parts of water reducing agent and 15 parts of modified fiber.
Example 4
The difference from example 1 is that the preparation method specifically comprises the following steps:
(1) Mixing the raw materials except the modified fiber, adding water until the water-cement ratio is about 4.5, uniformly stirring, slowly adding the modified fiber for 5 times under the stirring state, and stirring at a high speed of 500r/min for 3min to obtain precast concrete;
(2) Pouring and demolding: spraying a release agent on the surface of a mould (with the thickness of 12 cm), pouring precast concrete into the mould, vibrating to compact, leveling the surface, covering a cover plate, curing by using steam at the temperature of 92 ℃ for 8 hours, standing for 6 hours after curing, and demoulding to obtain the high-ductility concrete precast slab.
Example 5
The difference from example 1 is that ultra-high molecular weight polyethylene fiber is replaced with carbon fiber.
Comparative example 1
The precast slab is the same as example 1 except that it is composed of the following raw materials in parts by weight: 100 parts of cement, 10 parts of ultrafine fly ash, 6 parts of slag, 15 parts of silica fume, 100 parts of quartz sand, 4 parts of nano silicon dioxide, 3 parts of a water reducing agent and 12 parts of ultrahigh molecular weight polyethylene fiber.
Comparative example 2
The same as example 1 except that 10 parts of ultrafine fly ash was replaced with 4 parts of ultrafine fly ash and 6 parts of silica fume.
Comparative example 3
The difference from example 1 is that 4 parts of nano-silica were replaced with 4 parts of ultra-fine fly ash.
Comparative example 4
The same as example 1 except that the modified fiber was added in an amount of 6 parts.
Comparative example 5
The difference from example 1 is that the modified fiber was added in an amount of 20 parts.
Comparative example 6
The difference from example 1 is that the preparation method specifically comprises the following steps:
(1) Mixing the raw materials, adding water until the water-cement ratio is 4.3, uniformly stirring, and stirring at a high speed of 600r/min for 4min to obtain precast concrete;
(2) Pouring and demolding: spraying a release agent on the surface of a mould (with the thickness of 12 cm), pouring precast concrete into the mould, vibrating to compact, leveling the surface, covering a cover plate, curing by using steam at 90 ℃ for 8h, standing for 8h after curing, and demoulding to obtain the precast concrete slab.
Comparative example 7
The difference from example 1 is that the preparation method specifically comprises the following steps:
(1) Mixing the raw materials except the modified fiber, adding water until the water-cement ratio is 4.3, uniformly stirring, slowly adding the modified fiber, and stirring at the rotating speed of 300r/min for 4min to obtain precast concrete;
(2) Pouring and demolding: spraying a release agent on the surface of a mould (with the thickness of 12 cm), pouring precast concrete into the mould, vibrating to compact, leveling the surface, covering a cover plate, curing by using steam at 90 ℃ for 8h, standing for 8h after curing, and demoulding to obtain the precast concrete slab.
Comparative example 8
The difference from example 1 is that the raw material does not contain the modified fiber.
Effect example 1
The initial flow properties of the precast concretes of examples 1 to 5 and comparative examples 1 to 8 were measured according to the standard GB/T50081-2002 for mechanical properties of general concrete, and the results are shown in Table 1.
TABLE 1
| Grouping | Initial fluidity (mm) |
| Example 1 | 209 |
| Example 2 | 198 |
| Example 3 | 213 |
| Example 4 | 211 |
| Example 5 | 195 |
| Comparative example 1 | 163 |
| Comparative example 2 | 190 |
| Comparative example 3 | 188 |
| Comparative example 4 | 226 |
| Comparative example 5 | 138 |
| Comparative example 6 | 175 |
| Comparative example 7 | 184 |
| Comparative example 8 | 241 |
As can be seen from Table 1, the fluidity of the concrete can be kept at about 200mm by adopting the raw materials and the preparation method, which shows that the fluidity of the concrete is kept better after the modified fiber is doped, the concrete can be self-leveled and is suitable for pouring.
The concrete precast slabs prepared in examples 1 to 5 and comparative examples 1 to 8 were measured for compressive strength, tensile strength, ultimate tensile strength and tensile elongation, and the results are shown in Table 2.
TABLE 2
As can be seen from Table 2, the ultimate tensile strength and tensile elongation of the concrete precast slab can be significantly improved by using the raw materials and the preparation method of the invention.
The addition of a large amount (more than 2 wt.%) of fibers to concrete reduces the fluidity of concrete, and the fibers have obvious agglomeration, are difficult to fully compact and trowel, and although the fibers can be barely formed, the surface of a test piece has obvious pore defects and the like, so that the extensibility cannot be obviously improved. The invention utilizes the gum to modify the fiber, reduces the phenomenon that the fiber is agglomerated in the concrete, and further achieves the purpose of obviously improving the extensibility of the concrete under the condition of improving the addition amount of the fiber.
The above-described embodiments are only intended to illustrate the preferred embodiments of the present invention, and not to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (9)
1. The high-ductility concrete precast slab is characterized by comprising the following raw materials in parts by weight: 100 to 120 portions of cement, 6 to 22 portions of ultrafine fly ash, 2 to 10 portions of slag, 15 to 20 portions of silica fume, 100 to 150 portions of quartz sand, 3 to 5 portions of nano-silica, 2 to 5 portions of water reducing agent and 10 to 15 portions of modified fiber.
2. The high-ductility concrete precast slab as claimed in claim 1, which comprises the following raw materials in parts by weight: 100 parts of cement, 10 parts of ultrafine fly ash, 6 parts of slag, 15 parts of silica fume, 100 parts of quartz sand, 4 parts of nano silicon dioxide, 3 parts of water reducing agent and 12 parts of modified fiber.
3. The high-ductility concrete precast slab as claimed in claim 1, wherein the cement is portland cement; the particle size of the ultrafine fly ash is 2-4 mu m; the particle size of the slag is 1-3 mm.
4. The precast slab of high ductility concrete according to claim 1, wherein the silica fume has a particle size of 0.1 to 0.2 μm; siO in the quartz sand 2 The content of the compound is more than or equal to 98 percent; the particle size of the quartz sand is 1-1.5 mm.
5. The precast concrete slab of claim 1, wherein the nano silica has a particle size of 20 to 30nm; the water reducing agent is polycarboxylate water reducing agent.
6. The precast slab of high ductility concrete according to claim 1, characterized in that the preparation of the modified fiber specifically comprises: and (3) soaking the fiber in a gum solution, and drying to obtain the modified fiber.
7. The precast slab of high ductility concrete according to claim 6, wherein said fibers comprise ultra high molecular weight polyethylene fibers or carbon fibers; the mass fraction of the fibers in the modified fibers is 55-65%.
8. A method for preparing a high-ductility concrete precast slab as set forth in any one of claims 1 to 7, comprising the steps of:
(1) Mixing the raw materials except the modified fiber, adding water until the water-cement ratio is 4.2-4.5, uniformly stirring, slowly adding the modified fiber, and stirring for 3-5 min to obtain precast concrete;
(2) Pouring and demolding: and spraying a release agent on the surface of the mould, pouring the precast concrete into the mould, compacting by vibration, leveling the surface, covering a cover plate, then carrying out steam curing, standing and demoulding after the curing is finished, and thus obtaining the high-ductility concrete precast slab.
9. The method for preparing a high-ductility concrete precast slab as claimed in claim 8, wherein the stirring speed is 500-700 min; the steam curing temperature is 90-92 ℃, and the curing time is 6-8 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211116682.3A CN115353353A (en) | 2022-09-14 | 2022-09-14 | High-ductility concrete precast slab and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211116682.3A CN115353353A (en) | 2022-09-14 | 2022-09-14 | High-ductility concrete precast slab and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115353353A true CN115353353A (en) | 2022-11-18 |
Family
ID=84006494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211116682.3A Pending CN115353353A (en) | 2022-09-14 | 2022-09-14 | High-ductility concrete precast slab and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115353353A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020088536A (en) * | 2001-05-18 | 2002-11-29 | 주식회사 하이콘 | Bundle of crimped type reinforce ment-fiber and method for preparing the same |
| CN105948660A (en) * | 2016-06-14 | 2016-09-21 | 同济大学 | High-strength ultra-high-toughness concrete and preparation method thereof |
-
2022
- 2022-09-14 CN CN202211116682.3A patent/CN115353353A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020088536A (en) * | 2001-05-18 | 2002-11-29 | 주식회사 하이콘 | Bundle of crimped type reinforce ment-fiber and method for preparing the same |
| CN105948660A (en) * | 2016-06-14 | 2016-09-21 | 同济大学 | High-strength ultra-high-toughness concrete and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 杜卫民: "《纳米材料化学的理论与工程应用研究》", 电子科技大学出版社 * |
| 黄春龙等: "纳米二氧化硅影响水泥基材料流动性的研究综述" * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111377687A (en) | Graphene oxide low-cement-consumption ultrahigh-performance concrete and preparation method thereof | |
| CN107954656A (en) | A kind of regenerative micro powder concrete with superelevation ductility and preparation method thereof | |
| CN115140974B (en) | 200 MPa-grade steaming-free ultra-high-performance concrete containing coarse aggregate and preparation method thereof | |
| CN111792890A (en) | Full-scale fiber toughened ultrahigh-performance concrete and preparation method thereof | |
| CN110498649B (en) | Low-shrinkage cement-based repair material and preparation method thereof | |
| CN111423180A (en) | High-fluidity environment-friendly ultra-high-performance concrete and preparation method thereof | |
| CN113060997A (en) | RPC cover plate for subway evacuation platform and preparation method thereof | |
| CN112408880A (en) | Basalt fiber water-permeable concrete and preparation method thereof | |
| CN114180989A (en) | Self-made lightweight aggregate, lightweight ultrahigh-strength concrete and preparation method | |
| CN114105572A (en) | Basalt fiber reinforced active powder concrete cover plate and preparation method thereof | |
| CN113636814B (en) | Ultrahigh-performance concrete and preparation method thereof | |
| CN111233402B (en) | Anti-cracking facing layer of cement concrete member and preparation method thereof | |
| CN111548100B (en) | Large-volume high-strength concrete matching ratio based on temperature feedback and design method | |
| Goncharova et al. | Optimization of Fine-Grained Concrete Composition in Order to Improve the Quality of Units’ Front Surface | |
| CN112592114A (en) | Waterproof and antirust material for PC (polycarbonate) component | |
| CN107445551A (en) | A kind of integral type sound barrier column and preparation method thereof | |
| CN115286327B (en) | Quick-hardening micro-expansion high-crack-resistance maintenance material and preparation method thereof | |
| CN115353353A (en) | High-ductility concrete precast slab and preparation method thereof | |
| CN109020341B (en) | Ultrathin semi-precast concrete slab and manufacturing method thereof | |
| CN113511865B (en) | Preparation method of fiber concrete prefabricated truss | |
| CN116606111B (en) | High-strength anti-cracking vibration-free concrete and preparation method and application thereof | |
| CN117185730B (en) | High-strength shrinkage-free secondary pouring filling material for iron tower feet and pouring process of high-strength shrinkage-free secondary pouring filling material | |
| CN114835457B (en) | Ultra-high toughness mixture regenerated by waste combined micro powder and preparation method thereof | |
| CN114524646B (en) | Concrete cast-in-place process for building construction | |
| CN110451901B (en) | Super-early-strength high-ductility low-shrinkage mortar and preparation method thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221118 |