CN113511865B - Preparation method of fiber concrete prefabricated truss - Google Patents
Preparation method of fiber concrete prefabricated truss Download PDFInfo
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- CN113511865B CN113511865B CN202110858010.9A CN202110858010A CN113511865B CN 113511865 B CN113511865 B CN 113511865B CN 202110858010 A CN202110858010 A CN 202110858010A CN 113511865 B CN113511865 B CN 113511865B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/46—Rock wool ; Ceramic or silicate fibres
- C04B14/4643—Silicates other than zircon
- C04B14/4656—Al-silicates, e.g. clay
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/02—Alcohols; Phenols; Ethers
- C04B24/023—Ethers
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/304—Air-entrainers
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/601—Agents for increasing frost resistance
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/65—Water proofers or repellants
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/22—Carbonation resistance
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/29—Frost-thaw resistance
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
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- 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
Abstract
The invention relates to the technical field of concrete, and provides fiber concrete which comprises the following components in parts by mass: 800-1000 parts of Portland cement, 10-20 parts of polyformaldehyde fiber, 800-1000 parts of quartz sand, 2-4 parts of a defoaming agent, 180-250 parts of water, 10-15 parts of an additive and 10-14 parts of basalt fiber, wherein the additive comprises sodium cocoyl methyl taurate, phenoxyethanol and a polycarboxylic acid water reducing agent, and the mass ratio is 3. Through the technical scheme, the problem that the performance of the concrete truss in the prior art is reduced after the concrete truss is used for a long time is solved.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to a preparation method of a fiber concrete prefabricated truss.
Background
With the development of society, the building industry is rapidly developing, and the demand of truss also increases gradually, in addition, the truss still extensively is applied to and uses water conservancy science and technology, transmission line tower, crane rack etc.. The truss has the advantages that the rod piece mainly bears tension or pressure, the function of materials can be fully exerted, materials are saved, and the structure weight is reduced. Steel trusses, reinforced concrete trusses, prestressed concrete trusses, wood trusses, steel and wood composite trusses, and steel and concrete composite trusses are commonly used.
The pull rod of the concrete truss often cracks under long-term use load. Such cracks are caused by cement hydration and water migration on the one hand, and by stress from coarse aggregate, external structures, on the other hand, over a long period of time.
Disclosure of Invention
The invention provides a preparation method of a fiber concrete prefabricated truss, which solves the problem that the performance of the concrete truss in the prior art is reduced after long-term use.
The technical scheme of the invention is as follows:
the fiber concrete comprises the following components in parts by mass: 800-1000 parts of portland cement, 10-20 parts of polyformaldehyde fiber, 800-1000 parts of quartz sand, 2-4 parts of defoaming agent, 180-250 parts of water, 10-15 parts of additive and 10-14 parts of basalt fiber;
the additive comprises sodium cocoyl methyl taurate, phenoxyethanol and a polycarboxylic acid water reducing agent, and the mass ratio is 3.
As a further technical scheme, the particle size of the portland cement is 60-100 μm.
As a further technical scheme, the quartz sand is divided into two types, one type is 80-120 meshes, the other type is 40-80 meshes, and the proportion of the two types is 1:3.
As a further technical scheme, the diameter of the basalt fiber is 0.1-0.12mm, and the length of the basalt fiber is 6-8mm.
As a further technical scheme, the fiber concrete further comprises 1-2 parts of 2- (butylamino) ethanol.
As a further technical scheme, the basalt fiber is formed by melting basalt and steel slag and then drawing at a high speed.
The invention also provides a preparation method of the fiber concrete prefabricated truss, which comprises the following steps:
s1, preparing raw materials according to any one of the raw materials;
s2, mixing and stirring sodium cocoyl methyl taurate, phenoxyethanol and a polycarboxylic acid water reducing agent with water for 30-45S;
s3, adding portland cement and stirring for 1-2min;
s4, adding other components, uniformly stirring, and pouring into a mold;
and S5, curing to obtain the fiber concrete prefabricated truss.
The beneficial effects of the invention are as follows:
1. the invention uses the sodium cocoyl methyl taurate to replace the conventional alkyl sulfonate, the performance condition of the sodium cocoyl methyl taurate to concrete is far larger than that of sodium dodecyl sulfonate, the sodium cocoyl methyl taurate can be used as a water reducing agent and an air entraining agent to improve the frost resistance, a hydrophobic absorption film can be formed on the surface of the material, and the effects of anti-permeability and carbonization weakening can be well played.
2. The invention adds phenoxyethanol to obviously improve the frost resistance and impermeability of the concrete, and the inventor thinks that the phenoxyethanol can improve the cohesiveness between the cementing material and the basalt fiber, and in addition, the steric hindrance of the benzene ring is larger, so that the impermeability of the concrete can be further improved. In the invention, a byproduct steel slag in the steel-making process is mixed with basalt to prepare the basalt fiber, and the basalt fiber is used for improving the mechanical property of concrete and preventing the plastic shrinkage cracks of the concrete.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are intended to be within the scope of the present invention.
In the specific implementation mode of the invention, except for no special description, the basalt fiber is prepared by mixing basalt and steel slag according to the weight ratio of 5:1 at 1450-1500 ℃, and drawing the continuous fiber at high speed by a platinum rhodium alloy wire drawing bushing.
Example 1
S1, preparing materials: 800 parts of Portland cement, 10 parts of polyformaldehyde fiber, 800 parts of quartz sand, 2 parts of defoaming agent, 180 parts of water, 10 parts of additive and 10 parts of basalt fiber;
the additive comprises sodium cocoyl methyl taurate, phenoxyethanol and a polycarboxylic acid water reducing agent, and the mass ratio is 3;
the quartz sand is divided into two types, one is 80-120 meshes, the other is 40-80 meshes, and the proportion of the two types is 1:3;
s2, mixing and stirring sodium cocoyl methyl taurate, phenoxyethanol, a polycarboxylic acid water reducing agent and water for 30S;
s3, adding Portland cement and stirring for 1min;
s4, adding other components, uniformly stirring, and pouring into a mold;
and S5, curing to obtain the fiber concrete prefabricated truss.
Example 2
S1, preparing materials: 1000 parts of portland cement, 20 parts of polyformaldehyde fiber, 1000 parts of quartz sand, 4 parts of defoaming agent, 250 parts of water, 15 parts of additive and 14 parts of basalt fiber;
the additive comprises sodium cocoyl methyl taurate, phenoxyethanol and a polycarboxylic acid water reducing agent, and the mass ratio is 3;
the quartz sand is divided into two types, one is 80-120 meshes, the other is 40-80 meshes, and the proportion of the two types is 1:3;
s2, mixing and stirring sodium cocoyl methyl taurate, phenoxyethanol and a polycarboxylic acid water reducing agent with water for 45S;
s3, adding portland cement and stirring for 2min;
s4, adding other components, uniformly stirring, and pouring into a mold;
and S5, curing to obtain the fiber concrete prefabricated truss.
Example 3
S1, preparing materials: 900 parts of Portland cement, 15 parts of polyformaldehyde fiber, 900 parts of quartz sand, 3 parts of defoaming agent, 200 parts of water, 14 parts of additive and 12 parts of basalt fiber;
the additive comprises sodium cocoyl methyl taurate, phenoxyethanol and a polycarboxylic acid water reducing agent, and the mass ratio of the sodium cocoyl methyl taurate to the polycarboxylic acid water reducing agent is 3;
the quartz sand is divided into two types, one is 80-120 meshes, the other is 40-80 meshes, and the proportion of the two types is 1:3;
s2, mixing and stirring sodium cocoyl methyl taurate, phenoxyethanol, a polycarboxylic acid water reducing agent and water for 45S;
s3, adding Portland cement and stirring for 2min;
s4, adding other components, uniformly stirring, and pouring into a mold;
and S5, curing to obtain the fiber concrete prefabricated truss.
Example 4
S1, preparing materials: 850 parts of portland cement, 18 parts of polyformaldehyde fiber, 960 parts of quartz sand, 3 parts of a defoaming agent, 210 parts of water, 13 parts of an additive and 11 parts of basalt fiber;
the additive comprises sodium cocoyl methyl taurate, phenoxyethanol and a polycarboxylic acid water reducing agent, and the mass ratio of the sodium cocoyl methyl taurate to the polycarboxylic acid water reducing agent is 3;
the quartz sand is divided into two types, one is 80-120 meshes, the other is 40-80 meshes, and the proportion of the two types is 1:3;
s2, mixing and stirring sodium cocoyl methyl taurate, phenoxyethanol, a polycarboxylic acid water reducing agent and water for 45S;
s3, adding Portland cement and stirring for 2min;
s4, adding other components, uniformly stirring, and pouring into a mold;
and S5, curing to obtain the fiber concrete prefabricated truss.
Example 5
S1, preparing materials: 920 parts of portland cement, 16 parts of polyformaldehyde fiber, 900 parts of quartz sand, 3 parts of a defoaming agent, 230 parts of water, 14 parts of an additive and 12 parts of basalt fiber;
the additive comprises sodium cocoyl methyl taurate, phenoxyethanol and a polycarboxylic acid water reducing agent, and the mass ratio is 3;
the quartz sand is divided into two types, one is 80-120 meshes, the other is 40-80 meshes, and the proportion of the two types is 1:3;
s2, mixing and stirring sodium cocoyl methyl taurate, phenoxyethanol, a polycarboxylic acid water reducing agent and water for 35S;
s3, adding Portland cement and stirring for 1.5min;
s4, adding other components, uniformly stirring, and pouring into a mold;
and S5, curing to obtain the fiber concrete prefabricated truss.
Example 6
S1, preparing materials: 920 parts of portland cement, 16 parts of polyformaldehyde fiber, 900 parts of quartz sand, 3 parts of a defoaming agent, 230 parts of water, 14 parts of an additive, 12 parts of basalt fiber and 1 part of 2- (butylamino) ethanol;
the additive comprises sodium cocoyl methyl taurate, phenoxyethanol and a polycarboxylic acid water reducing agent, and the mass ratio is 3;
the quartz sand is divided into two types, one is 80-120 meshes, the other is 40-80 meshes, and the proportion of the two types is 1:3;
s2, mixing and stirring sodium cocoyl methyl taurate, phenoxyethanol, a polycarboxylic acid water reducing agent and water for 35S;
s3, adding Portland cement and stirring for 1.5min;
s4, adding other components, uniformly stirring, and pouring into a mold;
and S5, curing to obtain the fiber concrete prefabricated truss.
Example 7
S1, preparing materials: 920 parts of portland cement, 16 parts of polyformaldehyde fiber, 900 parts of quartz sand, 3 parts of a defoaming agent, 230 parts of water, 14 parts of an additive, 12 parts of basalt fiber and 2 parts of 2- (butylamino) ethanol;
the additive comprises sodium cocoyl methyl taurate, phenoxyethanol and a polycarboxylic acid water reducing agent, and the mass ratio is 3;
the quartz sand is divided into two types, one is 80-120 meshes, the other is 40-80 meshes, and the proportion of the two types is 1:3;
s2, mixing and stirring sodium cocoyl methyl taurate, phenoxyethanol, a polycarboxylic acid water reducing agent and water for 35S;
s3, adding Portland cement and stirring for 1.5min;
s4, adding other components, uniformly stirring, and pouring into a mold;
and S5, curing to obtain the fiber concrete prefabricated truss.
Example 8
S1, preparing materials: 920 parts of portland cement, 16 parts of polyformaldehyde fiber, 900 parts of quartz sand, 3 parts of defoaming agent, 230 parts of water, 14 parts of additive, 12 parts of basalt fiber and 1 part of 3,4-pyridine diimide;
the additive comprises sodium cocoyl methyl taurate, phenoxyethanol and a polycarboxylic acid water reducing agent, and the mass ratio is 3;
the quartz sand is divided into two types, one is 80-120 meshes, the other is 40-80 meshes, and the proportion of the two types is 1:3;
s2, mixing and stirring sodium cocoyl methyl taurate, phenoxyethanol, a polycarboxylic acid water reducing agent and water for 35S;
s3, adding Portland cement and stirring for 1.5min;
s4, adding other components, uniformly stirring, and pouring into a mold;
and S5, curing to obtain the fiber concrete prefabricated truss.
Comparative example 1
The sodium cocoyl methyl taurate of example 5 was replaced with an equivalent amount of sodium dodecylbenzene sulfonate, the other was the same as example 5.
Comparative example 2
The phenoxyethanol in example 5 was replaced with an equal amount of ethylene glycol, and the rest was the same as in example 5.
Comparative example 3
In this embodiment, the basalt fiber is a continuous fiber obtained by melting basalt at 1450 to 1500 ℃ and then drawing the molten basalt at high speed by a platinum-rhodium alloy bushing, and the other steps are the same as those in example 5.
Examples of the experiments
Before the truss is poured, a proper amount of sample is taken out, and the test is carried out after the maintenance is carried out for 28 days under standard conditions:
the freeze-thaw cycle performance test is carried out according to ASTM C666-97 concrete rapid freeze-thaw resistance cycle performance test, the average water seepage height and the carbonization depth are tested according to GB/T50082-2009 standard for testing the long-term performance and the durability of common concrete, other performances are tested according to GB/T50081-2016 standard for testing the mechanical performance of common concrete, and the test results are shown in Table 1.
TABLE 1 results of performance test of fiber concrete of examples and comparative examples
Examples 5 to 8 of the present invention are examples with good comprehensive properties, wherein 2- (butylamino) ethanol is added in examples 6 and 7, which can improve the water-proof, anti-seepage and anti-freezing properties of concrete, and 3,4-pyridine diimide is added in example 8, which has strong electronegativity, can improve the adsorption capacity between concrete gelled materials, improve the self-shrinkage of concrete, and provide a concrete sample with good mechanical properties, and on the other hand, the addition of 3,4-pyridine diimide can also improve the anti-seepage properties of concrete. In comparative example 1, sodium dodecyl benzene sulfonate is used to replace sodium cocoyl methyl taurate, and although the sodium cocoyl methyl taurate is sulfonate, the inventor finds through experiments that the performance of the sodium cocoyl methyl taurate on concrete is far greater than that of the sodium dodecyl sulfonate, the sodium cocoyl methyl taurate can be used as a water reducing agent and an air entraining agent to improve frost resistance, a hydrophobic absorption film can be formed on the surface of a material, the effects of permeability resistance and carbonization weakening can be well achieved, and the improvement of the frost resistance and durability of the sodium dodecyl sulfonate on concrete is far lower than that of the sodium cocoyl methyl taurate. In comparative example 2, the conventional air entraining agent ethylene glycol is used to replace phenoxyethanol, which has little influence on the mechanical properties of concrete, and the improvement level of the frost resistance and the impermeability of phenoxyethanol on concrete is higher than that of ethylene glycol. According to the application, the steel slag and the basalt are spun together, so that the prepared fiber has good dispersibility in cement concrete, and the mechanical property of the concrete is obviously improved.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The fiber concrete is characterized by comprising the following components: 920 parts of portland cement, 16 parts of polyformaldehyde fiber, 900 parts of quartz sand, 3 parts of defoaming agent, 230 parts of water, 14 parts of additive, 12 parts of basalt fiber and 1 part of 3,4-pyridine diimide;
the additive comprises sodium cocoyl methyl taurate, phenoxyethanol and a polycarboxylic acid water reducing agent, and the mass ratio is 3;
the basalt fiber is prepared from basalt and steel slag according to the weight ratio of 5:1 at 1450-1500 ℃, and drawing the continuous fiber at high speed by a platinum rhodium alloy wire drawing bushing.
2. The fiber concrete according to claim 1, wherein the portland cement has a particle size of 60-100 μm.
3. The fiber concrete of claim 1, wherein the silica sand is divided into two types, one of which is 80-120 mesh and the other of which is 40-80 mesh, and the ratio of the two types is 1:3.
4. The fiber concrete according to claim 1, wherein the basalt fibers have a diameter of 0.1-0.12mm and a length of 6-8mm.
5. The preparation method of the fiber concrete prefabricated truss is characterized by comprising the following steps of:
s1, preparing raw materials according to any one of claims 1 to 4;
s2, mixing and stirring sodium cocoyl methyl taurate, phenoxyethanol, a polycarboxylic acid water reducing agent and water for 30-45S;
s3, adding Portland cement and stirring for 1-2min;
s4, adding other components, uniformly stirring, and pouring into a mold;
and S5, curing to obtain the fiber concrete prefabricated truss.
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| CN104193388B (en) * | 2014-07-31 | 2016-03-23 | 吴美文 | A kind of high tenacity aerated bricks and preparation method thereof |
| CN105272079A (en) * | 2015-09-29 | 2016-01-27 | 马鞍山杰创塑胶科技有限公司 | Ageing and cracking resistant aerated building block and making method thereof |
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| RU2724631C1 (en) * | 2020-02-26 | 2020-06-25 | федеральное государственное бюджетное образовательное учреждение высшего образования "Донской государственный технический университет", (ДГТУ) | Fiber-concrete mixture for centrifuged concrete |
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