CN114804913A - Light high-strength concrete and preparation method thereof - Google Patents
Light high-strength concrete and preparation method thereof Download PDFInfo
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- CN114804913A CN114804913A CN202210128080.3A CN202210128080A CN114804913A CN 114804913 A CN114804913 A CN 114804913A CN 202210128080 A CN202210128080 A CN 202210128080A CN 114804913 A CN114804913 A CN 114804913A
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- 239000011372 high-strength concrete Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000002245 particle Substances 0.000 claims abstract description 19
- 239000004743 Polypropylene Substances 0.000 claims abstract description 10
- -1 polypropylene Polymers 0.000 claims abstract description 10
- 229920001155 polypropylene Polymers 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 239000000654 additive Substances 0.000 claims abstract description 6
- 230000000996 additive effect Effects 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000002518 antifoaming agent Substances 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 11
- 229910021487 silica fume Inorganic materials 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 7
- 239000011324 bead Substances 0.000 claims description 5
- 238000007667 floating Methods 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 5
- 239000011707 mineral Substances 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 239000008399 tap water Substances 0.000 claims description 2
- 235000020679 tap water Nutrition 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 239000008030 superplasticizer Substances 0.000 claims 1
- 239000004567 concrete Substances 0.000 abstract description 23
- 238000010276 construction Methods 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 2
- 238000003763 carbonization Methods 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
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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
-
- 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
- C04B2111/40—Porous or lightweight materials
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
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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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses light high-strength concrete and a preparation method thereof. The light high-strength concrete comprises raw materials of coarse aggregate, fine aggregate, light aggregate, a cementing material, an additive, polypropylene particles and water. The preparation method comprises the following steps: placing the cementing material, the lightweight aggregate, the coarse aggregate and the fine aggregate into a stirrer to be uniformly mixed; adding water and an additive into the obtained mixture, and continuously stirring until the mixture is in a flowing state; adding polypropylene particles into the obtained product and continuously stirring; pouring the obtained product into a mold with a base material, and standing at normal temperature until the product is solidified to obtain the lightweight high-strength concrete. The light high-strength concrete obtained by the invention realizes low volume weight, does not need high-temperature steam curing, and can be cured at normal temperature, so that the construction operation is convenient, and after the obtained light high-strength concrete is poured and hardened, the surface of the obtained concrete material is compact, and the concrete material has excellent durability of permeability resistance, carbonization resistance, chloride ion corrosion resistance and the like, and is suitable for preparing light prefabricated components.
Description
Technical Field
The invention relates to light high-strength concrete and a preparation method thereof, belonging to the field of building materials.
Background
At present, the economy of China is rapidly developed, concrete is taken as the most main engineering material in the present generation, and the development of the building industry gradually highlights the urgent need of a new concrete technology. The lightweight aggregate concrete can be divided into the following concrete according to the main application: thermal insulation lightweight aggregate concrete, structural thermal insulation lightweight aggregate concrete and structural lightweight aggregate concrete. Lightweight concrete is considered to be one of the hot spots in the future concrete technology research due to its own properties of light dead weight, low thermal conductivity, sound and heat insulation, etc.
At present, the industries of metallurgy, foamed ceramics and aerated concrete building blocks are rapidly developed, meanwhile, plastic processing is used as a huge industry in the market, and a large amount of solid wastes are generated in the processing, production and use processes. The development and production of the light high-strength environment-friendly concrete are urgent, and the novel light high-strength concrete can undoubtedly generate a great help. How to utilize plastic processing and industrial solid wastes to change wastes into valuables, reduce natural resource exploitation and energy consumption, develop certain research, and realize high added value utilization is undoubtedly a technical problem to be solved urgently at present.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to reduce the density of the concrete on the premise of ensuring the strength.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the light high-strength concrete comprises, by mass, 3-10% of coarse aggregate, 1-10% of fine aggregate, 3-10% of lightweight aggregate, 30-40% of cementing material, 0.1-4% of additive, 20-30% of polypropylene particles and the balance of water, and a small number of aluminum honeycomb panels with different arrangement structures are arranged in the concrete.
Preferably, the coarse aggregate is stone with the particle size not less than 15 mm; the fine aggregate is fine sand with the particle size of 0.16-0.3 mm; the lightweight aggregate has a true density of 100-2000kg/m 3 The floating bead has a particle size of 1-1500 μm.
Preferably, the cementing material comprises, by mass, 40-80% of cement, 5-30% of silica fume and the balance of mineral powder; wherein SiO in the silica fume 2 The mass percentage of the silica fume is not less than 94 percent, the average grain diameter of the silica fume is 0.15-0.20 mu m, and the specific surface area is 20000-25000 m 2 /kg。
Preferably, the admixture comprises a water reducing agent and a defoaming agent, wherein the mixing amount of the water reducing agent is 0.2-0.4% of the mass of the cementing material, the water reducing rate of the water reducing agent is not less than 35%, and the mixing amount of the defoaming agent is 0.1-1% of the mass of the cementing material.
More preferably, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent (the water reducing rate is more than or equal to 35%); the defoaming agent is a polyether defoaming agent, preferably a P803 defoaming agent.
Preferably, the particle size of the polypropylene particles is 1-3 mm.
Preferably, the water is ordinary tap water.
The invention also provides a preparation method of the light high-strength concrete, which comprises the following steps:
step 1): placing the cementing material, the light aggregate, the coarse aggregate and the fine aggregate into a stirrer, and stirring for 3-7 minutes until the materials are uniformly mixed;
step 2): adding water and an additive into the mixture obtained in the step 1), and continuously stirring until the mixture is in a flowing state;
step 3): adding polypropylene particles into the product obtained in the step 2), and continuously stirring for 3-5 min;
step 4): pouring the product obtained in the step 3) into a mold with a base material, and standing for 40-50 h at normal temperature until the product is solidified to obtain the lightweight high-strength concrete.
Preferably, the base material in the step 4) adopts aluminum honeycomb plates arranged in a specified arrangement mode.
More preferably, the aluminum honeycomb panel has a size of 50mm × 50mm × 10 mm.
Compared with the prior art, the invention has the beneficial effects that:
(1) the light-weight high-strength concrete adopts the floating beads with the true density of only 100-2000kg/m3 as the light aggregate to replace part of coarse aggregate, so that the concrete material is lightened, the fracture toughness and the fracture strength of the concrete matrix are improved under the condition of not influencing the bonding and sliding characteristics of the aggregate-cement matrix, and the quasi-strain hardening and the reduction of microcrack multi-point cracking are more facilitated.
(2) The lightweight high-strength concrete meets the requirement on the flow conductivity in the construction under the low water-cement ratio through the closest packing optimization design of the multi-element powder, and simultaneously improves the strength of the concrete.
(3) The compressive strength of the light high-strength concrete can reach 20-50MPa and the bending tensile strength can reach 7-12MPa under the volume weight of 1000-1400kg/m3 and the standard curing condition of 28 days.
(4) The lightweight high-strength concrete is designed according to the closest packing principle of the multi-element powder, so that high-temperature steam curing is not needed, normal-temperature curing is adopted, construction operation is convenient, and energy consumption is saved.
(5) After the light high-strength concrete obtained by the invention is poured and hardened, the surface of the obtained concrete material is compact, and the concrete material has excellent durability such as impermeability, carbonization resistance, chloride ion corrosion resistance and the like.
Drawings
FIG. 1 is a schematic view showing the structure of an aluminum honeycomb panel used in the concrete prepared in example 1.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
Example 1
Weighing the components according to the mass in the table 1, wherein the cement is P.O cement with the strength grade of 52.5, the average grain diameter of silica fume is 0.10-0.15 mu m, and SiO in the cement 2 Mass percent94.48 percent of the mineral powder, S105-grade mineral powder, fine aggregate which is fine sand with the granularity of 0.16-0.3mm, coarse aggregate which is broken stone with the grain diameter of more than or equal to 15mm, and light aggregate which is crushed stone with the true density of 300-800 kg/m 3 The floating beads are prepared from polycarboxylic acid high-efficiency water reducing agents, the water reducing rate is more than or equal to 35%, the defoaming agents are P803 defoaming agents in polyether modified silicon defoaming agents, the particle size of glass fiber reinforced polypropylene plastic particles is 1-3 mm, and the size of the aluminum honeycomb panel is 50mm multiplied by 10 mm.
TABLE 1 (unit: kg)
| Water (W) | Cement | Mineral powder | Silica fume | Floating bead | Crushing stone | Fine sand | Defoaming agent | Water reducing agent | Polypropylene particles |
| 2.65 | 5.23 | 1.50 | 0.747 | 1.542 | 0.771 | 1.85 | 0.0154 | 0.0748 | 5.398 |
As shown in fig. 1, a schematic structural diagram of an aluminum honeycomb layer in the aluminum honeycomb lightweight high-strength concrete prepared in example 1 includes three aluminum honeycomb panels 1, the surface of each aluminum honeycomb panel 1 is roughened, and a connecting interface 2 is provided between adjacent aluminum honeycomb panels 1.
According to the test method for mechanical properties of ordinary concrete GB50081-2002, the volume weight of the concrete obtained in the embodiment is 1351.8kg/m 3 The standard compressive strength of the sample at 28 days was 31.0 MPa.
Claims (10)
1. The lightweight high-strength concrete is characterized by comprising, by mass, 3-10% of coarse aggregate, 1-10% of fine aggregate, 3-10% of lightweight aggregate, 30-40% of cementing material, 0.1-4% of additive, 20-30% of polypropylene particles and the balance of water.
2. The lightweight high-strength concrete according to claim 1, wherein the coarse aggregate is stone having a particle size of not less than 15 mm; the fine aggregate is fine sand with the particle size of 0.16-0.3 mm; the lightweight aggregate has a true density of 100-2000kg/m 3 The floating beads have a particle size of 1 to 1500 μm.
3. The light-weight high-strength concrete according to claim 1, wherein the cementing material comprises 40-80% by mass of cement, 5-30% by mass of silica fume and the balance of mineral powder; wherein SiO in the silica fume 2 The mass percentage of the silica fume is not less than 94 percent, the average grain diameter of the silica fume is 0.15-0.20 mu m, and the specific surface area is 20000-25000 m 2 /kg。
4. The light-weight high-strength concrete according to claim 1, characterized in that the admixture comprises a water reducing agent and an antifoaming agent, wherein the mixing amount of the water reducing agent is 0.2-0.4% of the mass of the cementing material, the water reducing rate of the water reducing agent is not less than 35%, and the mixing amount of the antifoaming agent is 0.1-1% of the mass of the cementing material.
5. The lightweight high-strength concrete according to claim 4, wherein the water-reducing agent is a polycarboxylic acid-based superplasticizer; the defoaming agent is a polyether defoaming agent.
6. The lightweight high-strength concrete according to claim 1, wherein the polypropylene particles have a particle size of 1 to 3 mm.
7. The lightweight high strength concrete according to claim 1, wherein said water is ordinary tap water.
8. The method for producing a lightweight high-strength concrete according to any one of claims 1 to 7, characterized by comprising the steps of:
step 1): placing the cementing material, the light aggregate, the coarse aggregate and the fine aggregate into a stirrer, and stirring for 3-7 minutes until the materials are uniformly mixed;
step 2): adding water and an additive into the mixture obtained in the step 1), and continuously stirring until the mixture is in a flowing state;
step 3): adding polypropylene particles into the product obtained in the step 2), and continuously stirring for 3-5 min;
step 4): pouring the product obtained in the step 3) into a mold with a base material, and standing for 40-50 h at normal temperature until solidification to obtain the lightweight high-strength concrete.
9. The method for preparing lightweight high-strength concrete according to claim 8, wherein the base material in the step 4) is aluminum honeycomb panels arranged in a predetermined arrangement.
10. The method of claim 9, wherein the aluminum honeycomb panel has a size of 50mm x 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210128080.3A CN114804913A (en) | 2022-02-11 | 2022-02-11 | Light high-strength concrete and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210128080.3A CN114804913A (en) | 2022-02-11 | 2022-02-11 | Light high-strength concrete and preparation method thereof |
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| CN202210128080.3A Pending CN114804913A (en) | 2022-02-11 | 2022-02-11 | Light high-strength concrete and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844883A (en) * | 2010-01-28 | 2010-09-29 | 汪超 | Novel composite ecological cement and product application thereof |
| CN202727418U (en) * | 2012-07-26 | 2013-02-13 | 广州鸿力复合材料有限公司 | Composite honeycomb-shaped plate |
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| CN111764249A (en) * | 2020-07-02 | 2020-10-13 | 中铁大桥科学研究院有限公司 | Combined beam structure of UHPC (ultra high performance polycarbonate) honeycomb precast slab-steel box girder and construction method |
| CN214461844U (en) * | 2020-12-02 | 2021-10-22 | 江苏中锐华东建筑设计研究院有限公司 | Prestressed light energy-saving roof board |
-
2022
- 2022-02-11 CN CN202210128080.3A patent/CN114804913A/en active Pending
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| CN202727418U (en) * | 2012-07-26 | 2013-02-13 | 广州鸿力复合材料有限公司 | Composite honeycomb-shaped plate |
| CN203063188U (en) * | 2012-11-26 | 2013-07-17 | 中山市诚盛建材开发有限公司 | Light and porous concrete cellular board |
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Application publication date: 20220729 |