CN109626863A - A kind of corrosion resistant concrete additive of toughening - Google Patents
A kind of corrosion resistant concrete additive of toughening Download PDFInfo
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/30—Condensation polymers of aldehydes or ketones
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G16/00—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00
- C08G16/02—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes
- C08G16/04—Chemically modified polycondensates
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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
- C04B2103/61—Corrosion inhibitors
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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
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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
- C04B2111/2015—Sulfate 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
- C04B2111/2038—Resistance against physical degradation
- C04B2111/2046—Shock-absorbing 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
- 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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- 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]
Abstract
The present invention discloses a kind of corrosion resistant concrete additive of toughening, it is characterized in that, raw material including following mass percent: miberal powder 30-40%, silicon powder 30-40%, polypropylene fibre 6-12%, modified furan resin 6-12%, silane coupling agent 0.1%-0.2%, p-methyl benzenesulfonic acid 0.1-0.2%, sodium sulphate 4%-8%.The present invention can significantly improve the toughness and corrosion resistance energy of concrete, raw material is easy to get by the synergistic effect of silicon powder, polypropylene fibre and furane resins, preparation process simple process, easy construction, and mix thermosetting resin and can be reduced the dosage of cementitious material, reduce building cost.
Description
Technical field
The invention belongs to building material technical fields, and in particular to a kind of corrosion resistant concrete additive of toughening and its system
Preparation Method and application method.
Background technique
Current high performance concrete is mainly used for bearing structure form in engineering, is rarely used in stretch bending structure type.
It is certain with the concrete structure of particular/special requirement for, concrete structure part such as rigid frame bridge span centre closure segment can be in
Complex stress condition simultaneously will appear biggish tensile stress, due to the natural Embrittlement feature of concrete, tension, flexural strength
It is very low, it will cause cracking.High performance concrete glue is relatively low, and compactness improves self-constriction advantageous to durability but adjoint
Deformation is also larger, easily leads to concrete cracking, has negative effect to concrete works durability.In addition, concrete is chronically at
In various surrounding mediums, it often will cause different degrees of damage, even completely destroy, cause huge economic loss.It is this
Concrete structure damage and destruction are mainly caused by external condition (corrosive environment).Especially in inland varieties in saline-alkali areas, coastwise
Area, time less than 10 years after many bays building, bridge are built up, concrete because corrosion failure it is different degrees of there is bridge
Pier cracking peels off, the exposed situation of steel bar corrosion.
Chinese CN107698224A patent discloses a kind of concrete additive that can promote toughness properties, including following
The raw material of parts by weight: 15 parts of flyash, 14 parts of silicon dioxide powder, 8 parts of polypropylene fibre, 17 parts of zeolite powder, lignin sulfonic acid
15 parts of calcium powder, 20 parts of acrylic emulsion, 18 parts of sulfuric acid, 160 parts of water, 20 parts of phosphoric acid propane diamine, 21 parts of polysulfone resin, acrylate
38 parts of rubber, 16 parts of 4-dimethylaminopyridine, poly- [(2- Oxyranyle) -1,2 cyclohexanediols] 2- ethyl -2- (methylol) -
52 parts of 1,3-PD ether.Although the tough of concrete can be significantly improved using concrete made of concrete additive of the invention
Property performance, but the additive expensive raw material price, and need to be stirred at high temperature, preparation process complexity is cumbersome.
Chinese CN102320774A patent discloses a kind of concrete special anti-corrosion resistance embroidery anti-permeation cracking-resistant compound additive,
Raw material including following parts by weight: the SILICA FUME of 20-40, the high efficiency water reducing agent of 16-24,10-20 YS chain silicate receive
Rice material, the triethanolamine of 6-10, the frerrous chloride of 20-40 and 6-10 latex powder mix.The present invention can effectively improve
The effect of concrete corrosion-prevention rust-resistance effectively inhibits the generation of alkali-aggregate reaction, also has certain inhibiting effect to contraction, can be extensive
For the concrete structures in salt lake and coastal area, it can be also widely applied to metal smelt, chemical industry, petroleum etc. and be corrosive medium
Existing industrial building.The additive does not improve the toughness properties of concrete.
To solve the problems, such as the brittleness of concrete and corrosion-resistant, mainly using fiber composite high performance concrete and outer in engineering
The schemes such as anti-corrosive rust inhibitor are mixed, are reached to the corrosion resistant purpose of concrete toughening.But incorporation fiber composite high performance concrete
The scheme of anti-corrosive rust inhibitor is mixed outside, and project cost is higher, needs to be added a variety of additives, the consistency problem between additive
Concrete structure may also be damaged.Therefore, it is badly in need of designing that a kind of raw material is cheap, preparation process is simple, can significantly mention again
The toughness and corrosion resistance of high concrete can additive solve the above problems.
Summary of the invention
In response to the problems existing in the prior art, the purpose of the present invention is to provide a kind of corrosion resistant concrete additions of toughening
Agent can significantly improve the toughness and corrosion resistance of concrete by the synergistic effect of silicon powder, polypropylene fibre and furane resins
Can, raw material is easy to get, preparation process simple process, easy construction, and mixes thermosetting resin and can be reduced the dosage of cementitious material, drop
Low building cost.
To achieve the above object, the technical solution adopted by the present invention is that:
The present invention provides a kind of corrosion resistant concrete additive of toughening, which is characterized in that including following mass percent
Raw material: miberal powder 30-40%, silicon powder 30-40%, polypropylene fibre 6-12%, modified furan resin 6-12% are silane coupled
Agent 0.1%-0.2%, p-methyl benzenesulfonic acid 0.1-0.2%, sodium sulphate 4%-8%.
Preferable synergistic effect can be played between each raw material of concrete additive of the present invention, the silicon powder can drop
The exothermic peak temperature of low furane resins curing reaction reduces the linear expansion coefficient and shrinking percentage of concrete, to eliminate coagulation
The internal stress of soil, prevents from cracking；In the environment of aqueous solution, the furane resins can be cured as under the action of p-methyl benzenesulfonic acid
Insoluble and insoluble solid content makes concrete have stronger chemical corrosion resistance, has to acid, alkali, salt and organic solution excellent
Good resistance can be suitably used for soda acid alternate environment；The silane coupling agent can have aggregate with furane resins collective effect
Good wetability, Optimizing construction performance, while silane coupling agent can improve the boundary of inorganic matter and organic matter by bonding action
Face structure improves modified furan resin and cement, admixture, the adhesive strength between aggregate, significantly improves the anti-impact of concrete
It hits and corrosion resistance；The silicon powder, furane resins collective effect can increase polypropylene fibre in the polypropylene fibre
Toughness, improve the adhesive property of the aggregate of polypropylene fibre and concrete, prevent fibrous fracture, play reinforced action, support
Aggregate prevents aggregate sinking from isolating, prevents the generation in crack and reduce fracture width, effectively prevent inside concrete micro-
The extension of crackle improves the stress distribution and damage -form of concrete, fundamentally reduces the brittleness of concrete, improves concrete
Toughness, be allowed to be satisfied with the requirement of the structure types such as tension, bending resistance, improve the durability of concrete.
The modified furan resin the preparation method comprises the following steps:
The modified furan resin the preparation method comprises the following steps: by alkylated methylol groups phenol, furfuryl alcohol mix, be gradually warmed up, add
Enter toluene azeotropic water removing, circulation distillation removal water phase and toluene, cooling down obtain modified furan resin.The alkylation hydroxyl
Methylphenol, furfuryl alcohol mass ratio be 3:1.The viscosity of the modified furan resin is to apply -4 glasss of 20-30s.
Modified furan resin is incorporated into concrete as cementitious material, can be reduced the dosage of cement, reduces building cost.
After solidification, modified furan resin forms close reticular structure, and the degree of cross linking is very high, there is good impact resistance；Reaction is not participated in
Alkylated methylol groups phenol, can be used as cement concrete highly-efficient dispersing agent, can be in the case where not increasing water consumption significantly
The slump of concrete is improved, and can control concrete slump loss.
The alkylated methylol groups phenol the preparation method comprises the following steps:
The alkylated methylol groups phenol the preparation method comprises the following steps: by phenol heating melting, suitable concentrated sulfuric acid is then added,
100-150 DEG C is heated the mixture to, styrene is gradually added into, the styrene keeps the temperature 40-50min after being added, then
Mixture is cooled to 60-80 DEG C, in cooling procedure, the sodium hydroxide solution being gradually added into reaches 60-80 DEG C in temperature
Afterwards, suitable formalin is added in 1 hour, 1-2 hour is kept the temperature, until formaldehyde end of reaction；With dilute sulfuric acid tune
PH to 5-6 is saved, then is heated up, toluene azeotropic water removing is added, water phase is removed by suction, cooling down obtains alkylated methylol groups
Phenol.The viscosity of the alkylated methylol groups phenol applies -4 glasss of 20-30s.
The phenol: styrene: the mass ratio of formaldehyde is 5-6:6-7:4-5.
The present invention also provides a kind of preparation methods of the corrosion resistant concrete additive of toughening, comprising the following steps:
Miberal powder, modified furan resin, silane coupling agent are mixed in proportion, grinding in grinder is placed in and is mixed
Above-mentioned mixture, silicon powder, polypropylene fibre, p-methyl benzenesulfonic acid, sodium sulphate, are then put into stirring container by material in proportion,
Stirring at normal temperature uniformly obtains additive.
The present invention also provides a kind of application methods of the corrosion resistant concrete additive of toughening, comprising the following steps:
(1) ingredient: cement, water, coarse aggregate, miberal powder, flyash, additive, the additional amount of the additive are gelling material
The 6-10% of material；
(2) it stirs, form: blender is added in cement, miberal powder, flyash, coarse aggregate and stirs 30s, then by half
Water blender is added 30s is mixed, then blender is added in remaining half water and additive, 1min is mixed,
Obtain concrete, packing compact forming；
(3) it conserves: after vibration moulding, resting on 20 ± 5 DEG C of environment 24-48h demoulding, test block is then put into 20 ± 2
DEG C, the standard curing room that relative humidity is 95% or more conserves.
Compared with prior art, the beneficial effects of the present invention are:
(1) present invention can significantly improve concrete by the synergistic effect of silicon powder, polypropylene fibre and furane resins
Toughness and corrosion resistance energy, raw material are easy to get, preparation process simple process, easy construction, and mix thermosetting resin and can be reduced glue
The dosage of gel material reduces building cost；
(2) silicon powder of the present invention, modified furan resin collective effect can increase poly- third in the polypropylene fibre
The toughness of alkene fiber improves the adhesive property of polypropylene fibre and aggregate, prevents fibrous fracture, keeps the polypropylene fine
Dimension plays reinforced action in concrete, and support aggregate effectively prevent aggregate sinking to isolate, prevents the generation in crack and subtract
Few fracture width, effectively prevents the extension of inside concrete micro-crack, improves the stress distribution and damage -form of concrete, from root
The brittleness that concrete is reduced in sheet, improves the toughness of concrete, is allowed to be satisfied with the requirement of the structure types such as tension, bending resistance, improve
The durability of concrete；
(3) silicon powder can reduce the exothermic peak temperature of furane resins curing reaction, reduce the line expansion of concrete
Coefficient and shrinking percentage prevent from cracking to eliminate the internal stress of concrete；In addition, by incorporation silicon powder, filling concrete particle
Between hole, while with hydrated product generate gelinite, have water conservation, prevent isolation, bleeding, be greatly reduced concrete pumping hinder
The effect of power；The significant service life for extending concrete is especially disliked in villiaumite system erosion, sulfate attack, high humility etc.
Under bad environment, the durability of concrete can be made to double even several times；
(4) in the environment of aqueous solution, the modified furan resin can be cured as insoluble under the action of p-methyl benzenesulfonic acid
With insoluble solid content, makes concrete that there is stronger chemical corrosion resistance, have to acid, alkali, salt and organic solution excellent
Resistance can be suitably used for soda acid alternate environment；After solidification, modified furan resin forms close netted knot in inside concrete
Structure, the degree of cross linking is very high, there is good impact resistance.
(5) present invention uses the alkylated methylol groups phenol to be incorporated into for the modified furan resin that raw material is prepared mixed
In solidifying soil, it as cementitious material, can be reduced the dosage of cement, reduce building cost, do not participate in the alkylated methylol groups benzene of reaction
Phenol can be used as cement concrete highly-efficient dispersing agent, and the slump of concrete can be greatly improved in the case where not increasing water consumption
Degree, and can control concrete slump loss；
(6) silane coupling agent and modified furan resin collective effect can have good wetability to aggregate, optimize
Workability, meanwhile, silane coupling agent can improve the interfacial structure of inorganic matter and organic matter by bonding action, improve modified furan
Furane resins and cement, admixture, the adhesive strength between aggregate, significantly improve shock resistance and the corrosion resistance of concrete；
(7) sodium sulphate can improve hydrated cementitious rate, can be with the Ca (OH) that is precipitated when hydrated cementitious2It reacts, thus plus
The condensation and hardening process of fast cement improve early strength.
Specific embodiment
Technical solution of the present invention is clearly and completely described below, it is clear that described embodiment is only this hair
Bright a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
All other embodiment obtained under the conditions of creative work is made, shall fall within the protection scope of the present invention.
The present invention provides a kind of corrosion resistant concrete additive of toughening, the raw material including following mass percent: miberal powder
30-40%, silicon powder 30-40%, polypropylene fibre 6-12%, modified furan resin 6-12%, silane coupling agent 0.1%-
0.2%, p-methyl benzenesulfonic acid 0.1-0.2%, sodium sulphate 4%-8%.The raw material of additive are in above-mentioned model in following embodiment
In enclosing.
Embodiment 1
The present embodiment provides a kind of corrosion resistant concrete additive of toughening, the raw materials including following mass percent: mine
Powder 35%, silicon powder 40%, polypropylene fibre 9%, modified furan resin 9%, silane coupling agent 0.1%, p-methyl benzenesulfonic acid
0.2%, sodium sulphate 6.7%.
The modified furan resin is phenol aldehyde modified furane resins.
A kind of preparation method of the corrosion resistant concrete additive of toughening described in the present embodiment, comprising the following steps: will
Miberal powder, modified furan resin, silane coupling agent mix in proportion, and are placed in grinding in grinder and obtain mixture, then will
Above-mentioned mixture, silicon powder, polypropylene fibre, p-methyl benzenesulfonic acid, sodium sulphate are put into stirring container in proportion, and stirring at normal temperature is equal
It is even to obtain additive.
The present embodiment provides a kind of application methods of the corrosion resistant concrete additive of toughening, comprising the following steps:
(1) ingredient: the additional amount of cement, water, coarse aggregate, flyash, miberal powder, water-reducing agent, additive, the additive is
The 8% of cementitious material；
(2) it stirs, form: blender is added in cement, flyash, miberal powder, coarse aggregate and stirs 30s, then by half
Water blender is added 30s is mixed, then blender is added in remaining half water and additive, 1min is mixed,
Obtain concrete, packing compact forming；
(3) it conserves: after vibration moulding, resting on 20 ± 5 DEG C of environment 24-48h demoulding, test block is then put into 20 ± 2
DEG C, the standard curing room that relative humidity is 95% or more conserves.
Concrete mix is as follows: in step (1)
| Water-cement ratio | Cement | Miberal powder | Flyash | Sand | Stone | Water | Water-reducing agent | Additive |
| 0.55 | 256 | 32 | 32 | 780.6 | 1123.4 | 176 | 8 | 25.6 |
Units/kg/m3
Embodiment 2
The present embodiment provides a kind of corrosion resistant concrete additives of toughening, compared with Example 1, the difference is that,
The modified furan resin the preparation method comprises the following steps: by alkylated methylol groups phenol, furfuryl alcohol 3:1 in mass ratio mix, be gradually warmed up
To 140 DEG C, toluene azeotropic water removing, circulation distillation is added.After water phase and toluene are removed by distillation, cooling down is reacted to
Blowing when appropriate viscosity (applying 4 glasss of 25s), obtains modified furan resin.
Additive is prepared in concrete according to 1 the method for embodiment, is obtained concrete sample, is tested.
Embodiment 3
The present embodiment provides a kind of corrosion resistant concrete additives of toughening, compared with Example 1, the difference is that,
The modified furan resin the preparation method comprises the following steps: by alkylated methylol groups phenol, furfuryl alcohol 3:1 in mass ratio mix,
It is gradually warmed up to 140 DEG C, toluene azeotropic water removing, circulation distillation is added.After water phase and toluene are removed by distillation, cool down cold
But, blowing when being reacted to appropriate viscosity (applying 4 glasss of 25s), obtains modified furan resin.
The alkylated methylol groups phenol the preparation method comprises the following steps: by phenol heating melting, suitable concentrated sulfuric acid is then added,
After heating the mixture to 100 DEG C, it is gradually added into styrene, exothermic heat of reaction.When all styrene addition finish when, temperature should on
140 DEG C are raised to, and in 140 DEG C of holding 50min, mixture is then cooled to 60 DEG C, in cooling procedure, is gradually added into 33%
Sodium hydroxide solution suitable 37% formalin is added in 1 hour, is maintained at 60 after temperature reaches 60 DEG C
DEG C 1 hour, until formaldehyde end of reaction.PH to 5.2 is adjusted with 25% dilute sulfuric acid, then is warming up to 100 DEG C, toluene azeotropic is added
Water removal removes water phase, cooling down by suction, and blowing when being reacted to appropriate viscosity (applying 4 glasss of 25s) obtains alkylation hydroxyl first
Base phenol.The phenol: styrene: the mass ratio of formaldehyde is 5:6:4.
Additive is prepared in concrete according to 1 the method for embodiment, is obtained concrete sample, is tested.
Embodiment 4
The present embodiment provides a kind of corrosion resistant concrete additives of toughening, compared with Example 1, the difference is that,
Raw material including following mass percent: miberal powder 35%, silicon powder 32.6%, polypropylene fibre 12%, modified furan resin
12%, silane coupling agent 0.2%, p-methyl benzenesulfonic acid 0.2%, sodium sulphate 8%.
Additive is prepared in concrete according to 1 the method for embodiment, is obtained concrete sample, is tested.
Comparative example 1
This comparative example provides a kind of corrosion resistant concrete additive of toughening, compared with Example 1, the difference is that,
Raw material including following mass percent: miberal powder 35%, silicon powder 40%, polypropylene fibre 9%, epoxy resin 9%, silane are even
Join agent 0.1%, p-methyl benzenesulfonic acid 0.2%, sodium sulphate 6.7%.
Additive is prepared in concrete according to 1 the method for embodiment, is obtained concrete sample, is tested.
Comparative example 2
This comparative example provides a kind of corrosion resistant concrete additive of toughening, compared with Example 1, the difference is that,
Raw material including following mass percent: miberal powder 35%, silicon powder 35%, polyester fiber 10%, silane coupling agent 1%, to first
Benzene sulfonic acid 1%, sodium sulphate 8%.
Additive is prepared in concrete according to 1 the method for embodiment, is obtained concrete sample, is tested.
Performance test
According to GB/T50107-2010 " Standard for inspection and assessment of strength of concrete "；GB/T50082-2009 " normal concrete
Long-term behaviour and endurance quality test method standard " toughness corrosion resistant concrete that each embodiment and comparative example is prepared into
The test of row correlated performance will separately not mix concrete that additive is formulated as a comparison case 3, and measurement result is as shown in table 1:
The measurement of 1 concrete performance of table
As seen from the above table, the toughness corrosion resistant concrete and normal concrete that additive of the present invention is prepared are mixed
It compares, 28d compression strength, 28d flexural strength, coefficient against corrosion have a distinct increment, and the coefficient of expansion is also controlled in lower level；
By comparative example 1 and comparative example 2 as can be seen that silicon powder, polypropylene fibre and modified furan resin three's energy of the present invention
Good synergistic effect is enough played, the toughness and corrosion resistance energy of concrete, the generation and reduction of crack preventing are improved
Fracture width effectively prevents the extension of inside concrete micro-crack, improves the stress distribution and damage -form of concrete, from root
The brittleness that concrete is reduced in sheet, improves the toughness of concrete, is allowed to be satisfied with the requirement of the structure types such as tension, bending resistance, improve
The durability of concrete.Therefore, the toughness and corrosion resistance energy of concrete can be significantly improved by mixing additive of the present invention.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. a kind of corrosion resistant concrete additive of toughening, which is characterized in that the raw material including following mass percent: miberal powder
30-40%, silicon powder 30-40%, polypropylene fibre 6-12%, modified furan resin 6-12%, silane coupling agent 0.1%-
0.2%, p-methyl benzenesulfonic acid 0.1-0.2%, sodium sulphate 4%-8%.
2. the corrosion resistant concrete additive of a kind of toughening according to claim 1, which is characterized in that the modified furans
Resin the preparation method comprises the following steps: by alkylated methylol groups phenol, furfuryl alcohol mix, be gradually warmed up, be added toluene azeotropic water removing, circulation steam
It evaporates except water phase and toluene, cooling down obtains modified furan resin.
3. the corrosion resistant concrete additive of a kind of toughening according to claim 2, which is characterized in that the alkylation hydroxyl
Methylphenol, furfuryl alcohol mass ratio be 3:1.
4. the corrosion resistant concrete additive of a kind of toughening according to claim 2, which is characterized in that the alkylation hydroxyl
Methylphenol the preparation method comprises the following steps: by phenol heating melting, suitable concentrated sulfuric acid is then added, heats the mixture to 100-
150 DEG C, it is gradually added into styrene, the styrene keeps the temperature 40-50min after being added, mixture is then cooled to 60-80
DEG C, in cooling procedure, the sodium hydroxide solution being gradually added into is added appropriate after temperature reaches 60-80 DEG C in 1 hour
Formalin, keep the temperature 1-2 hour, until formaldehyde end of reaction；PH to 5-6 is adjusted with dilute sulfuric acid, then is heated up, is added
Toluene azeotropic water removing removes water phase by suction, and cooling down obtains alkylated methylol groups phenol.
5. the corrosion resistant concrete additive of a kind of toughening according to claim 4, which is characterized in that the alkylation hydroxyl
The viscosity of methylphenol applies -4 glasss of 20-30s.
6. the corrosion resistant concrete additive of a kind of toughening according to claim 4, which is characterized in that the phenol: benzene
Ethylene: the mass ratio of formaldehyde is 5-6:6-7:4-5.
7. the corrosion resistant concrete additive of a kind of toughening according to claim 1, which is characterized in that the modified furans
The viscosity of resin is to apply -4 glasss of 20-30s.
8. a kind of described in any item preparation methods of the corrosion resistant concrete additive of toughening of claim 1-7, feature exist
In, comprising the following steps: miberal powder, modified furan resin, silane coupling agent are mixed in proportion, is placed in grinder and grinds
Mixture is obtained, above-mentioned mixture, silicon powder, polypropylene fibre, p-methyl benzenesulfonic acid, sodium sulphate are then put into stirring in proportion
In container, stirring at normal temperature uniformly obtains additive.
9. a kind of application method of the corrosion resistant concrete additive of toughening, which comprises the following steps:
(1) ingredient: cement, water, coarse aggregate, flyash, miberal powder, water-reducing agent, additive, the additional amount of the additive are gelling
The 6-10% of material；
(2) it stirs, form: cement, flyash, miberal powder, coarse aggregate being added blender and stirred evenly, then by the water of half
Blender is added to be mixed evenly, then blender is added in remaining half water and additive and is mixed evenly, obtains
To concrete, packing compact forming；
(3) it conserves: after vibration moulding, resting on 20 ± 5 DEG C of environment 24-48h demoulding, test block is then put into 20 ± 2 DEG C, phase
The fog room for being 95% or more to humidity conserves.
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| CN113816679A (en) * | 2021-09-25 | 2021-12-21 | 北京建工一建工程建设有限公司 | Lean concrete applied to complex geological environment and preparation process thereof |
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