CN111960769A - Novel nano modified high-strength concrete - Google Patents
Novel nano modified high-strength concrete Download PDFInfo
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- CN111960769A CN111960769A CN202010862460.0A CN202010862460A CN111960769A CN 111960769 A CN111960769 A CN 111960769A CN 202010862460 A CN202010862460 A CN 202010862460A CN 111960769 A CN111960769 A CN 111960769A
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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
- C04B2111/00008—Obtaining or using nanotechnology related 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
- 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
-
- 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
- C04B2111/29—Frost-thaw resistance
-
- 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]
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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 novel nano modified high-strength concrete comprises the following components in parts by mass: 170-220 parts of water; 340-460 parts of Portland cement; 600-850 parts of aggregate; 13-28 parts of a nano porous material; 220-250 parts of nano fibers; 50-80 parts of silica fume; 65-95 parts of mineral powder; 3-5 parts of a water reducing agent; 15-30 parts of a filling reinforcing material; according to the nano modified high-strength concrete, the portland cement and the aggregate are used as main materials of the concrete, the nano porous material and the nano fibers are added to modify the concrete, so that the mechanical property, the salt resistance, the freezing resistance and the high temperature resistance of the concrete are improved, the whole easiness and the fluidity are kept, the inner pores of the concrete are effectively filled, and the grain gradation and the compactness are improved.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to novel nano modified high-strength concrete.
Background
The cement material is a building material with the widest application and the largest use amount at present, and has an unforeseeable position in infrastructure construction. With the increase of infrastructure investment, the demand on cement materials is more and more, and the demand on various service performances such as strength of concrete is higher and higher.
The nanometer material is used as a modified material, so that the concrete has higher mechanical property and durability, and the application range of the concrete in the fields of high-rise building engineering, ocean engineering and the like is widened. When the nano material is used for improving one property of the concrete, the other property of the concrete is possibly influenced, so that the other properties of the modified concrete are reduced, and the application range of the concrete is influenced.
Disclosure of Invention
In order to overcome the above disadvantages of the prior art, the present invention aims to provide a novel nano-modified high strength concrete.
The technical scheme adopted by the invention for solving the technical problems is as follows: the novel nano modified high-strength concrete comprises the following components in parts by mass:
170-220 parts of water;
340-460 parts of Portland cement;
600-850 parts of aggregate;
13-28 parts of a nano porous material;
220-250 parts of nano fibers;
50-80 parts of silica fume;
65-95 parts of mineral powder;
3-5 parts of a water reducing agent;
15-30 parts of filling reinforcing material.
As a further improvement of the invention: the nano porous material is one or more of nano silicon oxide, nano iron oxide and nano porous silicon.
As a further improvement of the invention: the particle size of the nano-porous material is between 5 and 40 nanometers.
As a further improvement of the invention: the nano-porous material is added into water dissolved with a water reducing agent, and the nano-porous material is added into the water dissolved with the water reducing agent according to the weight ratio of 1: 30 percent of the total weight.
As a further improvement of the invention: the nano silicon oxide is hydrophilic-type meteorological nano silicon dioxide of alatin, the particle size is 7-40 nanometers, and the average particle size is 25 nanometers.
As a further improvement of the invention: the aggregate comprises coarse aggregate and fine aggregate, the coarse aggregate comprises gravel with the particle size of 5-20mm, and the fine aggregate is sand with the particle size of 2-6 mm.
As a further improvement of the invention: the fine aggregate is river sand, the maximum grain diameter is 5mm, the fineness modulus is 2.8, and zone II is in continuous gradation.
As a further improvement of the invention: the nano-fiber is nano-carbon fiber or porous nano-carbon fiber.
As a further improvement of the invention: the filling strengthening material is one or more of quartz powder, silicon nitride, silicon carbide and glass fiber.
As a further improvement of the invention: the water reducing agent is one of sodium lignosulphonate, sodium sulfite and sugar calcium.
As a further improvement of the invention: the nano modified high-strength concrete comprises the following components in percentage by mass: 180 parts of water, 340 parts of Portland cement, 650 parts of aggregate, 19 parts of nano silicon oxide, 230 parts of nano carbon fiber, 56 parts of silica fume, 72 parts of mineral powder, 3 parts of water reducing agent and 22 parts of filling reinforcement material.
As a further improvement of the invention: the preparation method comprises the following steps:
1) weighing the raw material components according to the proportion;
2) adding the Portland cement, the aggregate, the silica fume and the mineral powder into a stirrer according to the weight part ratio, and stirring for 5min by the stirrer;
3) the water reducing agent is blended into water, and the nano porous material and the nano fiber are added into the water dissolved with the water reducing agent;
4) adding water containing the water reducing agent into the stirrer for 10min in several times to form a concrete mixture;
5) adding the filling reinforcing material into the concrete mixture, stirring and placing;
6) and continuously stirring the concrete mixture to obtain the nano modified high-strength concrete.
As a further improvement of the invention: in the step (2), the nano porous material needs to be subjected to ultrasonic dispersion treatment for 30 min.
Compared with the prior art, the invention has the beneficial effects that: according to the nano modified high-strength concrete, the portland cement and the aggregate are used as main materials of the concrete, the nano porous material and the nano fibers are added to modify the concrete, so that the mechanical property, the salt resistance, the freezing resistance and the high temperature resistance of the concrete are improved, the whole easiness and the fluidity are kept, the inner pores of the concrete are effectively filled, and the grain gradation and the compactness are improved.
Detailed Description
The invention will now be further illustrated with reference to the following examples:
the first embodiment is as follows:
the novel nano modified high-strength concrete comprises the following components in parts by mass: the nano modified high-strength concrete comprises the following components in percentage by mass: 180 parts of water, 340 parts of Portland cement, 650 parts of aggregate, 19 parts of nano silicon oxide, 230 parts of nano carbon fiber, 56 parts of silica fume, 72 parts of mineral powder, 3 parts of sodium lignosulfonate and 22 parts of quartz powder.
The preparation method comprises the following steps:
1) weighing the raw material components according to the proportion;
2) adding the Portland cement, the aggregate, the silica fume and the mineral powder into a stirrer according to the weight part ratio, and stirring for 5min by the stirrer;
3) dissolving sodium lignosulfonate in water, respectively ultrasonically dispersing nano silicon oxide and nano carbon fiber for 30min, and then adding the nano silicon oxide and the nano carbon fiber into the water in which the sodium lignosulfonate is dissolved;
4) adding water containing sodium lignosulfonate, nano silicon oxide and nano carbon fiber into a stirrer for several times, and stirring for 10min to form a concrete mixture;
5) adding quartz powder into the concrete mixture, stirring and then placing;
6) and continuously stirring the concrete mixture to obtain the nano modified high-strength concrete.
The second embodiment:
the novel nano modified high-strength concrete comprises the following components in parts by mass: the nano modified high-strength concrete comprises the following components in percentage by mass: 170 parts of water, 340 parts of Portland cement, 620 parts of aggregate, 19 parts of nano iron oxide, 230 parts of nano carbon fiber, 52 parts of silica fume, 67 parts of mineral powder, 3 parts of sodium sulfite and 22 parts of silicon nitride.
The preparation method comprises the following steps:
1) weighing the raw material components according to the proportion;
2) adding the Portland cement, the aggregate, the silica fume and the mineral powder into a stirrer according to the weight part ratio, and stirring for 5min by the stirrer;
3) dissolving sodium sulfite into water, respectively ultrasonically dispersing the nano iron oxide and the nano carbon fiber for 30min, and then adding the nano iron oxide and the nano carbon fiber into the water dissolved with the sodium sulfite;
4) adding water containing sodium sulfite, nano iron oxide and nano carbon fibers into a stirrer for 10min in several times to form a concrete mixture;
5) adding silicon nitride into the concrete mixture, stirring and then placing;
6) and continuously stirring the concrete mixture to obtain the nano modified high-strength concrete.
The third embodiment is as follows:
the novel nano modified high-strength concrete comprises the following components in parts by mass: the nano modified high-strength concrete comprises the following components in percentage by mass: 200 parts of water, 400 parts of Portland cement, 650 parts of aggregate, 13 parts of nano silicon oxide, 230 parts of nano carbon fiber, 60 parts of silica fume, 75 parts of mineral powder, 4 parts of sodium lignosulfonate and 25 parts of quartz powder.
The preparation method comprises the following steps:
1) weighing the raw material components according to the proportion;
2) adding the Portland cement, the aggregate, the silica fume and the mineral powder into a stirrer according to the weight part ratio, and stirring for 5min by the stirrer;
3) dissolving sodium lignosulfonate in water, respectively ultrasonically dispersing nano silicon oxide and nano carbon fiber for 30min, and then adding the nano silicon oxide and the nano carbon fiber into the water in which the sodium lignosulfonate is dissolved;
4) adding water containing sodium lignosulfonate, nano silicon oxide and nano carbon fiber into a stirrer for several times, and stirring for 10min to form a concrete mixture;
5) adding quartz powder into the concrete mixture, stirring and then placing;
6) and continuously stirring the concrete mixture to obtain the nano modified high-strength concrete.
The fourth embodiment is as follows:
the novel nano modified high-strength concrete comprises the following components in parts by mass: the nano modified high-strength concrete comprises the following components in percentage by mass: 200 parts of water, 400 parts of Portland cement, 650 parts of aggregate, 13 parts of nano iron oxide, 230 parts of nano carbon fiber, 60 parts of silica fume, 75 parts of mineral powder, 4 parts of sodium lignosulfonate and 25 parts of quartz powder.
The preparation method comprises the following steps:
1) weighing the raw material components according to the proportion;
2) adding the Portland cement, the aggregate, the silica fume and the mineral powder into a stirrer according to the weight part ratio, and stirring for 5min by the stirrer;
3) dissolving sodium lignosulfonate in water, respectively ultrasonically dispersing the nano iron oxide and the nano carbon fiber for 30min, and then adding the nano iron oxide and the nano carbon fiber into the water in which the sodium lignosulfonate is dissolved;
4) adding water containing sodium lignosulfonate, nano iron oxide and nano carbon fiber into a stirrer for several times, and stirring for 10min to form a concrete mixture;
5) adding quartz powder into the concrete mixture, stirring and then placing;
6) and continuously stirring the concrete mixture to obtain the nano modified high-strength concrete.
The fifth embodiment:
the novel nano modified high-strength concrete comprises the following components in parts by mass: the nano modified high-strength concrete comprises the following components in percentage by mass: 220 parts of water, 440 parts of Portland cement, 700 parts of aggregate, 28 parts of nano silicon oxide, 240 parts of nano carbon fiber, 65 parts of silica fume, 75 parts of mineral powder, 4 parts of sodium lignosulfonate and 25 parts of quartz powder.
The preparation method comprises the following steps:
1) weighing the raw material components according to the proportion;
2) adding the Portland cement, the aggregate, the silica fume and the mineral powder into a stirrer according to the weight part ratio, and stirring for 5min by the stirrer;
3) dissolving sodium lignosulfonate in water, respectively ultrasonically dispersing nano silicon oxide and nano carbon fiber for 30min, and then adding the nano silicon oxide and the nano carbon fiber into the water in which the sodium lignosulfonate is dissolved;
4) adding water containing sodium lignosulfonate, nano silicon oxide and nano carbon fiber into a stirrer for several times, and stirring for 10min to form a concrete mixture;
5) adding quartz powder into the concrete mixture, stirring and then placing;
6) and continuously stirring the concrete mixture to obtain the nano modified high-strength concrete.
The sixth implementation case:
the novel nano modified high-strength concrete comprises the following components in parts by mass: the nano modified high-strength concrete comprises the following components in percentage by mass: 220 parts of water, 440 parts of Portland cement, 700 parts of aggregate, 28 parts of nano iron oxide, 240 parts of nano carbon fiber, 65 parts of silica fume, 75 parts of mineral powder, 4 parts of sodium lignosulfonate and 25 parts of quartz powder.
The preparation method comprises the following steps:
1) weighing the raw material components according to the proportion;
2) adding the Portland cement, the aggregate, the silica fume and the mineral powder into a stirrer according to the weight part ratio, and stirring for 5min by the stirrer;
3) dissolving sodium lignosulfonate in water, respectively ultrasonically dispersing the nano iron oxide and the nano carbon fiber for 30min, and then adding the nano iron oxide and the nano carbon fiber into the water in which the sodium lignosulfonate is dissolved;
4) adding water containing sodium lignosulfonate, nano iron oxide and nano carbon fiber into a stirrer for several times, and stirring for 10min to form a concrete mixture;
5) adding quartz powder into the concrete mixture, stirring and then placing;
6) and continuously stirring the concrete mixture to obtain the nano modified high-strength concrete.
Concrete prepared in the embodiment is poured into a template, vibration molding is carried out by using a vibrating rod, the concrete in the template is cured according to a conventional curing method, mechanical tests are carried out on the finished product at normal temperature and high temperature, and the test results are shown in the following table.
TABLE 1 compressive strengths of nano-modified high-strength concrete at different temperatures
From table 1, it can be known that, as a modification material for concrete mechanical properties, nano-silica is more favorable for increasing the compressive strength of the retarded soil than nano-iron oxide, and in the first embodiment, when the content of the nano-porous material is 1.2%, the performance is optimal, and meanwhile, the nano-silica has better high-temperature tolerance.
In summary, after reading the present disclosure, those skilled in the art can make various other corresponding changes without creative mental labor according to the technical solutions and concepts of the present disclosure, and all of them are within the protection scope of the present disclosure.
Claims (8)
1. The novel nano modified high-strength concrete is characterized by comprising the following components in parts by mass:
170-220 parts of water;
340-460 parts of Portland cement;
600-850 parts of aggregate;
13-28 parts of a nano porous material;
220-250 parts of nano fibers;
50-80 parts of silica fume;
65-95 parts of mineral powder;
3-5 parts of a water reducing agent;
15-30 parts of filling reinforcing material.
2. The novel nano-modified high-strength concrete according to claim 1, wherein the nano-porous material is one or more of nano-silica, nano-iron oxide and nano-porous silicon.
3. The novel nano-modified high-strength concrete according to claim 1, wherein the nano-porous material has a particle size of 5-40 nm.
4. The novel nano-modified high-strength concrete according to claim 1, wherein the aggregate comprises coarse aggregate and fine aggregate, the coarse aggregate comprises crushed stones with the particle size of 5-20mm, and the fine aggregate is sand stones with the particle size of 2-6 mm.
5. The novel nano-modified high-strength concrete according to claim 1, wherein the nano-fibers are nano-carbon fibers or porous nano-carbon fibers.
6. The novel nano-modified high-strength concrete according to claim 1, wherein the water reducing agent is one of sodium lignosulfonate, sodium sulfite and calcium saccharate.
7. The novel nano-modified high-strength concrete according to claim 1, characterized by comprising the following components in percentage by mass: 180 parts of water, 340 parts of Portland cement, 650 parts of aggregate, 19 parts of nano silicon oxide, 230 parts of nano carbon fiber, 56 parts of silica fume, 72 parts of mineral powder, 3 parts of water reducing agent and 22 parts of filling reinforcement material.
8. The novel nano-modified high-strength concrete according to claim 1, which is prepared by the following steps:
1) weighing the raw material components according to the proportion;
2) adding the Portland cement, the aggregate, the silica fume and the mineral powder into a stirrer according to the weight part ratio, and stirring for 5min by the stirrer;
3) the water reducing agent is blended into water, and the nano porous material and the nano fiber are added into the water dissolved with the water reducing agent;
4) adding water containing the water reducing agent into the stirrer for 10min in several times to form a concrete mixture;
5) adding the filling reinforcing material into the concrete mixture, stirring and placing;
6) and continuously stirring the concrete mixture to obtain the nano modified high-strength concrete.
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| CN202010862460.0A CN111960769A (en) | 2020-08-25 | 2020-08-25 | Novel nano modified high-strength concrete |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112851249A (en) * | 2021-01-29 | 2021-05-28 | 烟台泰航混凝土有限公司 | Freeze-thaw resistant concrete and preparation method thereof |
| CN114436593A (en) * | 2022-02-17 | 2022-05-06 | 江苏晨马建筑科技有限公司 | High-strength concrete production process capable of being quickly condensed |
| CN115093155A (en) * | 2022-06-29 | 2022-09-23 | 江苏万邦新材料科技有限公司 | High-strength high-fluidity composite additive for concrete and preparation method thereof |
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