CN106587714B - A kind of concrete anticracking impervious agent and preparation method thereof - Google Patents
A kind of concrete anticracking impervious agent and preparation method thereof Download PDFInfo
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- CN106587714B CN106587714B CN201611143057.2A CN201611143057A CN106587714B CN 106587714 B CN106587714 B CN 106587714B CN 201611143057 A CN201611143057 A CN 201611143057A CN 106587714 B CN106587714 B CN 106587714B
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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
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The invention discloses a kind of concrete anticracking impervious agents and preparation method thereof.Concrete anticracking impervious agent of the present invention is formed according to the weight ratio by following raw materials: modification sulphonation graphene: 1-10%, hydrophobic substance: 1-15%, emulsifier A:0.1-2%, defoaming agent: 0.001-0.01%, surplus are water.It obtains using with amino silane modified sulfonated graphene with the modification sulphonation graphene with concrete with excellent binding force.Cracking resistance, Pinhole closure and the hydrophobic substance waterproof action of composite modified sulfonated graphene two-dimensional sheet nano material, are prepared the concrete anticracking impervious agent that can stablize storage.Concrete anticracking impervious agent of the present invention improves the performance of agent on crack resistance of concrete folding tension cracking resistance；Meanwhile can prevent water and chloride salt from entering inside concrete by pore, concrete impermeability is further increased, to greatly improve the durability of concrete.
Description
Technical field
The present invention relates to concrete admixture fields more particularly to a kind of concrete anticracking impervious agent and preparation method thereof.
Background technique
The large projects such as highway, bridge, railway, nuclear power, water power, harbour, ocean are built on a large scale, still
The major defect of concrete is brittleness, crack and infiltration, thus the problems such as caused easy crack, makes the decline of its performance, uses
The lost of life.
For graphene as Sheet Graphite, each carbon atom in monoatomic layer plane passes through very strong σ key and other
Three carbon atoms are connected, these very strong C-C keys cause graphene sheet layer to have excellent structural rigidity；And on graphene planes
The existing microcosmic distortion of nanoscale then makes its structure more stable.Graphene is as intensity and the maximum flexibility lamella material of hardness
Material can improve cement brittleness well and increase the toughness of concrete to reduce the generation of microcrack, improve concrete hole knot
Structure air-free concrete is to improve the durability of concrete.The large specific surface area of graphene, specific surface energy is high, leads to graphene not
Blocky aggregation is reversibly agglomerated into, or even is stacked into graphite again to lose its excellent properties, in coagulation
The dispersion of graphene is more difficult under native alkaline environment, to limit application of the graphene in concrete.Patent of invention
A kind of graphene cement based intelligent concrete material described in CN201610092342.X and preparation method thereof, with a large amount of dispersion
Agent dispersed graphite alkene might have bleed or increase the hydrophilic problem of concrete, and there is no statement graphenes in paper
The stability of dispersing liquid, so the stability of graphene dispersing solution is also likely to be present problem, sulfonated graphene is in graphene table
Face introduces sulfonate radical, can be stable in aqueous solution, while can be good at being dispersed in concrete, but graphene is made
For inert material, it is very weak with the binding force of concrete, so that the high-strength and high-ductility of graphene cannot get maximum embodiment.And
The tensile property and compaction rate of concrete can be improved as 2D sheet layer material for graphene, but can not prevent due to pore
Absorb water the water and chloride ion reinforcement corrosion ion conducted.
Summary of the invention
In order to solve poor existing graphene dispersion, sulfonated graphene and concrete binding force is weak and concrete pore
Water suction introduces the problem of corrosive ion, can make concrete anticracking, anti-permeability performance enhancing the present invention provides one kind and can improve
Concrete anticracking impervious agent of anti-water effect of concrete and preparation method thereof.
The present invention provides a kind of concrete anticracking impervious agent, each component presses following mass percentage composition:
The hydrophobic substance is the mixture of one or more of Decanol, undecyl alcohol, lauryl alcohol arbitrary proportion；
The emulsifier A be peregal 15, peregal 20, peregal 25, polysorbate60, Tween 80, tween 70, polysorbate85,
The mixture of one or more of castor oil polyoxyethylene ether EL-40, castor oil polyoxyethylene ether EL-60 arbitrary proportion；
The defoaming agent is mineral oil defoaming agent；
The modification sulphonation graphene is made by the silane compound with amino, sulfonated graphene and emulsifier B.
The nitrogen sulphur molar ratio of the silane compound and sulfonated graphene is 1:3-1:2, and the emulsifier B mass is sulphur
The 0.5%-5% of graphite alkene quality.
The silane compound structure with amino meets following general formula R1-SiR2R3R4, wherein R1For with primaquine
Base, the straight chain of secondary amino group or with the residual chain of branched alkyl；R2、R3、R4For-O-R6,R6It is the straight chain for including 1-3 carbon atom, branch
The alkyl residue of chain.
The emulsifier B be peregal 15, peregal 20, peregal 25, polysorbate60, Tween 80, tween 70, polysorbate85,
The mixture of one or more of castor oil polyoxyethylene ether EL-40, castor oil polyoxyethylene ether EL-60 arbitrary proportion.
A kind of preparation method of concrete anticracking impervious agent of the present invention, includes the following steps:
(1) preparation of modification sulphonation graphene emulsion: by the silane compound with amino, sulfonated graphite aqueous solution,
Emulsifier B is added in reaction kettle 1, is heated to 40-60 DEG C, persistently stirs 6-24h, mixing speed 300-2000rpm, i.e.,
Obtain modification sulphonation graphene emulsion；
(2) preparation of concrete anticracking impervious agent: by modification sulphonation graphene emulsion made from step (1), hydrophobic substance,
Emulsifier A, defoaming agent and water are added to cutting kettle 2, and low whipping speed is stirring at normal temperature under the conditions of 2000-3000rpm after mixing
1-3h obtains the concrete anticracking impervious agent.
The sulfonated graphene solution is that gained is bought on existing market.
Relative to other graphite alkenes concrete admixtures, the advantages and beneficial effects of the present invention are: MOLECULE DESIGN and
The reasonable distribution of component invents a kind of and the good compound cracking resistance of cement binding force, impervious, waterproof coagulation additive, utilizes ammonia
Base and sulfonic group reaction introduce reactive silane groups on the surface of graphene, and enhancing is in forming process between graphene and cement
Binding force, the characteristics of showing graphene high-strength and high ductility in concrete to greatest extent, improve the property of agent on crack resistance of concrete folding tension cracking resistance
Energy；Meanwhile the water suction of concrete surface pore and graphene 2D barrier property are reduced using hydrophobic substance, water and chlorine can be prevented
Compound salt enters inside concrete by pore, further increases concrete impermeability, to greatly improve concrete
Durability.
Specific embodiment
For a better understanding of the present invention, the contents of the present invention are further described below with reference to embodiment, but this
The content of invention is not limited to the scope of the embodiments.
In each embodiment, concrete charge pass is according to professional standard JTJ275-2000 " concrete for marine works structural anticorrosion
Lose technical specification " require measurement.Chlorine ion concentration is according to GB/T50082-2009 " normal concrete long-term behaviour and endurance quality
Experimental method standard " measurement is required, concrete water absorption rate is according to British Standard BS 1881-122-2011 " testing
Concrete part 122:method for determination of water absorption " it requires, measure tension
The test block of intensity is 8 type matrixes, and cross dimensions 3cm*3cm is tested referring to DL/T5150-2001 standard.
Embodiment 1
Take γ aminopropyltriethoxy silane 3.1g, the sulfonated graphite aqueous solution 70g of mass concentration 10%, emulsification
Agent polysorbate60 0.035g is uniformly mixed and is added in reaction kettle 1, is heated to 40 DEG C, 40 DEG C of stirring 6h, mixing speed is
300rpm to get arrive modification sulphonation graphene emulsion.
By above-mentioned modification sulphonation graphene emulsion 73.1g, Decanol 10g, 15 1g of peregal, defoaming agent 0.01g and water
905.6g is added in cutting kettle 2 that stirring at normal temperature 1h obtains concrete anticracking impervious agent under the conditions of 2000rpm.
Embodiment 2
Take γ aminopropyltriethoxy silane 9.5g, the sulfonated graphite aqueous solution 210g of mass concentration 10%, emulsification
Agent Tween 80 0.21g is uniformly mixed and is added in reaction kettle 1, is heated to 50 DEG C, 50 DEG C of stirrings 8h, mixing speed 700rpm,
Obtain modification sulphonation graphene emulsion.
By above-mentioned modification sulphonation graphene emulsion 219.7g, undecyl alcohol 70g, 25 5g of peregal, defoaming agent 0.03g and water
674.6g is added in cutting kettle 2 that stirring at normal temperature 1h obtains concrete anticracking impervious agent under the conditions of 2500rpm.
Embodiment 3
Take sulfonated graphite aqueous solution 340g, the cream of gamma-amino propyl trimethoxy silicane 15.3g, mass concentration 10%
Agent EL-40 0.68g is uniformly mixed and is added in reaction kettle 1, is heated to 60 DEG C, 60 DEG C of stirring 10h, mixing speed is
1200rpm to get arrive modification sulphonation graphene emulsion.
By above-mentioned modification sulphonation graphene emulsion 356.0g, lauryl alcohol 140g, 25 10g of peregal, defoaming agent 0.07g and
Water 444.0g is added in cutting kettle 2 that stirring at normal temperature 2h obtains concrete anticracking impervious agent under the conditions of 3000rpm.
Embodiment 4
Take gamma-amino propyl trimethoxy silicane 40g, the sulfonated graphite aqueous solution 590g of mass concentration 10%, emulsification
Agent EL-60 1.77g is uniformly mixed and is added in reaction kettle 1, is heated to 60 DEG C, 60 DEG C of stirring 12h, mixing speed is
2000rpm to get arrive modification sulphonation graphene emulsion.
By above-mentioned modification sulphonation graphene 631.6g, positive certain herbaceous plants with big flowers alcohol 150g, 15 15g of peregal, defoaming agent 0.1g and water
102.6g is added in cutting kettle 2 that stirring at normal temperature 3h obtains concrete anticracking impervious agent under the conditions of 3000rpm.
Embodiment 5
Take the sulfonated graphite aqueous solution of N- β (aminoethyl)-γ-aminopropyltrimethoxysilane 40g, mass concentration 10%
590g, 60 2.36g of emulsifier tween are uniformly mixed and are added in reaction kettle 1, are heated to 50 DEG C, 50 DEG C of stirring 12h, stirring speed
Degree be 1000rpm to get arrive modification sulphonation graphene emulsion.
By above-mentioned modification sulphonation graphene emulsion 632.3g, undecyl alcohol 10g, 20 20g of peregal, defoaming agent 0.01g and water
236.5g is added in cutting kettle 2 that stirring at normal temperature 3h obtains concrete anticracking impervious agent under the conditions of 2000rpm.
Embodiment 6
Take N- β (aminoethyl)-γ-aminopropyltrimethoxysilane 22.9g, the sulfonated graphene of mass concentration 10% water-soluble
Liquid 340g, 80 1.70g of emulsifier tween are uniformly mixed and are added in reaction kettle 1, are heated to 60 DEG C, 60 DEG C of stirring 8h, stirring speed
Degree be 1800rpm to get arrive modification sulphonation graphene emulsion.
By above-mentioned modification sulphonation graphene 364.6g, lauryl alcohol 10g, 15 10g of peregal, defoaming agent 0.06g and water
556.6g is added in cutting kettle 2 that stirring at normal temperature 3h obtains concrete anticracking impervious agent under the conditions of 2500rpm.
Application effect detection:
Concrete anticracking impervious agent the performance test results obtained by each embodiment are shown in Table 1.Wherein, tensile strength is according to identical
Emulsion solid content volume (solid weight/cement=0.7% of lotion) carries out cement paste test, water-cement ratio 0.35, mark
Quasi- maintenance 28 days.Electric flux, chloride ion and water absorption rate are according to identical emulsion solid content volume (solid weight/cement of lotion
Mineral admixture=0.7%) carry out testing concrete performance, and using the blank concrete of non-adding Concrete cracking resistance impervious agent as
Control, concrete mix are as follows: cement 3.8Kg, flyash 1.66Kg, slag 2.94Kg, sand 15Kg, great Shi 15.15Kg are small
Stone 6.5Kg, water 2.94Kg, wherein cement is conch brand 42.5R cement.The cement of passage capacity test discovery embodiment 1-6
28 days tensile strength >=4MPa of net slurry mix 28 days electric fluxes of concrete of the concrete anticracking impervious agent in embodiment 1-6
≤ 1000C, 28 days chlorine ion concentration≤10 × 10-12mg/cm2D, water absorption rate≤2.0%.
Comparative example 1-6 and blank assay group are can be found that: 28 days tensile strength of concrete anticracking impervious agent is blank
157%-218% times of group, 28 days electric fluxes only have the 52%-76% of blank group, and chloride ion only has the 55%- of blank group within 28 days
67%, water absorption rate only has the 41%-57% of blank group within 3 days.As a result as can be seen that concrete anticracking impervious agent can significantly improve
For the tensile property of concrete to improve the cracking resistance of concrete, improving concrete density reduces concrete chloride ion transmission
Rate reduces concrete water absorption rate, reduces pore water suction, can prevent water and chloride salt from entering concrete by pore
Inside further increases concrete impermeability, to greatly improve the durability of concrete.
Concrete anticracking impervious agent the performance test results obtained by each embodiment of table 1
| Number | 28 days tensile properties | 28 days electric fluxes | 28 days chloride ions | 3 days water absorption rates |
| Blank control group | 100% | 100% | 100% | 100% |
| Embodiment 1 | 188% | 76% | 62% | 52% |
| Embodiment 2 | 173% | 63% | 63% | 47% |
| Embodiment 3 | 157% | 71% | 67% | 41% |
| Embodiment 4 | 183% | 63% | 60% | 46% |
| Embodiment 5 | 218% | 52% | 55% | 57% |
| Embodiment 6 | 215% | 55% | 58% | 55% |
Claims (5)
1. a kind of concrete anticracking impervious agent, which is characterized in that each component presses following mass percentage composition:
The modification sulphonation graphene is made by the silane compound with amino, sulfonated graphene and emulsifier B；
The nitrogen sulphur molar ratio of the silane compound and sulfonated graphene is 1:3-1:2, and the emulsifier B mass is sulfonation stone
The 0.5%-5% of black alkene quality.
2. a kind of concrete anticracking impervious agent according to claim 1, which is characterized in that the hydrophobic substance is positive the last of the ten Heavenly stems
The mixture of one or more of alcohol, undecyl alcohol, lauryl alcohol arbitrary proportion；
The emulsifier A is peregal 15, peregal 20, peregal 25, polysorbate60, Tween 80, tween 70, polysorbate85, castor-oil plant
The mixture of one or more of oily polyoxyethylene ether EL-40, castor oil polyoxyethylene ether EL-60 arbitrary proportion；
The defoaming agent is mineral oil defoaming agent.
3. a kind of concrete anticracking impervious agent according to claim 2, which is characterized in that the silanes with amino
It closes object structure and meets general formula R1-SiR2R3R4, wherein R1For the straight chain with primary amino group, secondary amino group or with the residual chain of branched alkyl；
R2、R3、R4For-O-R6,R6It is the straight chain for including 1-3 carbon atom, the alkyl residue of branch.
4. a kind of concrete anticracking impervious agent according to claim 3, which is characterized in that the emulsifier B is peregal
15, peregal 20, peregal 25, polysorbate60, Tween 80, tween 70, polysorbate85, castor oil polyoxyethylene ether EL-40, castor oil
The mixture of one or more of polyoxyethylene ether EL-60 arbitrary proportion.
5. a kind of described in any item preparation methods of concrete anticracking impervious agent of Claims 1-4, which is characterized in that including
Following steps:
(1) preparation of modification sulphonation graphene emulsion: by the silane compound with amino, sulfonated graphite aqueous solution, emulsification
Agent B is added in reaction kettle 1, is heated to 40-60 DEG C, persistently stirs 6-24h, and mixing speed is 300-2000rpm to get to changing
Property sulfonated graphene lotion；
(2) preparation of concrete anticracking impervious agent: by modification sulphonation graphene emulsion, hydrophobic substance, emulsification made from step (1)
Agent A, defoaming agent and water are added to cutting kettle 2, and low whipping speed is stirring at normal temperature 1-3h under the conditions of 2000-3000rpm after mixing
Obtain the concrete anticracking impervious agent.
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| CN108793792B (en) * | 2017-04-27 | 2021-04-20 | 江苏苏博特新材料股份有限公司 | Toughened and reinforced cement and preparation method thereof |
| CN107130512B (en) * | 2017-07-02 | 2019-08-27 | 倡创(上海)咨询管理事务所 | A kind of bridge pinner construction method |
| CN108793819B (en) * | 2018-07-23 | 2020-12-29 | 中建商品混凝土广西有限公司 | Composite concrete anti-cracking agent and preparation method thereof |
| CN109851294A (en) * | 2019-01-14 | 2019-06-07 | 海南大学 | A kind of maritime concrete material and preparation method thereof |
| CN111234114B (en) * | 2020-03-17 | 2021-06-15 | 中国核工业中原建设有限公司 | Preparation method of polymer latex for improving impermeability of cement-based concrete |
| CN112408852B (en) * | 2020-11-23 | 2022-06-24 | 山西科腾环保新材料股份有限公司 | Preparation method of hydrophobic pore plug for composite biological grafted concrete |
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