CN109437729A - A kind of freeze proof anti-crack concrete - Google Patents
A kind of freeze proof anti-crack concrete Download PDFInfo
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- CN109437729A CN109437729A CN201811276537.5A CN201811276537A CN109437729A CN 109437729 A CN109437729 A CN 109437729A CN 201811276537 A CN201811276537 A CN 201811276537A CN 109437729 A CN109437729 A CN 109437729A
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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
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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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
- C04B2111/00017—Aspects relating to the protection of the environment
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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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of freeze proof anti-crack concrete, raw material includes: portland cement, agstone, steel-making slag powder, sand, microlith, modified rubber powder, potassium water glass, expanded perlite, natural zeolite superfine powder, polypropylene fibre, glass fibre, water-reducing agent, water.A kind of freeze proof anti-crack concrete proposed by the present invention, workability is good, while having good frost resistance and splitting resistance, effectively extends the service life of concrete in the presence of a harsh environment.
Description
Technical field
The present invention relates to technical field of concrete more particularly to a kind of freeze proof anti-crack concretes.
Background technique
Concrete is the maximum construction material of current dosage, is widely used in all trades and professions, in the ring of some inclement conditions
In border, concrete does not need only to have certain mechanical strength, also to have good freeze proof, anti-cracking performance, and high property
Energy concrete represents the developing direction of concrete technology.In recent years, with the fast development of construction industry, in some adverse circumstances
Lower its frost resistance of the concrete used and splitting resistance cannot be met the requirements, and need further to study and improve.
Summary of the invention
Technical problems based on background technology, the invention proposes a kind of freeze proof anti-crack concrete, workability
It is good, while there is good frost resistance and splitting resistance, effectively extend the service life of concrete in the presence of a harsh environment.
A kind of freeze proof anti-crack concrete proposed by the present invention, raw material include: portland cement 220-320 by weight
Part, 10-20 parts of agstone, 35-50 parts of steel-making slag powder, 650-800 parts of sand, microlith be 700-850 parts sub-, modified rubber powder 25-45
Part, 8-15 parts of potassium water glass, 10-15 parts of expanded perlite, 15-20 parts of natural zeolite superfine powder, 4-6 parts of polypropylene fibre, glass
3-5 parts of glass fiber, 5-6 parts of water-reducing agent, 100-140 parts of water.
In specific embodiment, the parts by weight of portland cement can also be 235,250,265,280,300,310 parts, stone
The parts by weight of limestone flour can also be 12,14,15,16,18 parts, and the parts by weight of steel-making slag powder can also be 38,40,42,45,48
Part, the parts by weight of sand can also be 665,680,700,720,750,780 parts, the parts by weight of microlith can also be 720,740,
750,760,780,800,825 parts, the parts by weight of modified rubber powder can also be 28,32,35,38,40,42 parts, potassium water glass
Parts by weight can also be 9,10,11,12,13,14 parts, the parts by weight of expanded perlite can also be 11,12,13,14 parts, day
The parts by weight of right zeolite superfine powder can also be 16,17,18,19 parts, the parts by weight of polypropylene fibre can also for 4.2,4.5,
4.8,5.2,5.5,5.8 parts, the parts by weight of glass fibre can also be 3.4,3.8,4,4.2,4.5,4.8 parts, the weight of water-reducing agent
Measuring part can also be 5.2,5.4,5.5,5.6,5.8 parts, and the parts by weight of water can also be 108,115,120,128,135 parts.
Preferably, the fineness modulus of sand is 1.8-2.4, and clay content is no more than 1.2wt%.
Preferably, modified rubber powder is prepared by following technique: waste rubber powder is placed in sodium hydrate aqueous solution
It impregnates, takes out washing, be subsequently placed in dehydrated alcohol and impregnate, add vinyltriethoxysilane, acetic anhydride and initiator,
Stirring, filtering are added acetone and carry out precipitation and separation, be washed out, dry, pulverize, obtain modified rubber powder.
Preferably, modified rubber powder is prepared by following technique: it is 15-18wt%'s that waste rubber powder, which is placed in concentration,
18-20h is impregnated in sodium hydrate aqueous solution, is washed with clear water to neutrality after taking-up, is subsequently placed in dehydrated alcohol and impregnates 1-
1.5h adds vinyltriethoxysilane, acetic anhydride and initiator, and in 70-75 DEG C of stirring 2-3h, acetone is added in filtering
Precipitation and separation is carried out, is then washed with clear water, be dry, pulverize at 70-75 DEG C, obtain modified rubber powder.
Preferably, the weight ratio between waste rubber powder, vinyltriethoxysilane, acetic anhydride and initiator is 20-
30:1-1.5:4-5:0.1-0.2。
Preferably, initiator is made of benzoyl peroxide and ammonium persulfate.
Preferably, the granularity of modified rubber powder is 70-80 mesh.
Preferably, water-reducing agent is prepared by following technique: methyl allyl polyoxyethylene ether is mixed with deionized water,
It is warming up to 74-78 DEG C, hydroxy methyl methacrylate, methylpropene sodium sulfonate, acrylic acid and persulfuric acid are added dropwise under stirring
Ammonium, time for adding 3-3.5h are warming up to 82-86 DEG C after being added dropwise to complete, and continue to stir 25-30min, are then down to room temperature, adjust
Section system pH adds sodium thiosulfate and polyethylene glycol, obtains water-reducing agent to neutrality.
Preferably, in water-reducing agent preparation process, methyl allyl polyoxyethylene ether, 4- hydroxybutyl acrylate, 2- third
Weight ratio between olefin(e) acid amido -2- methyl propane sulfonic acid, acrylic acid, ammonium persulfate, sodium thiosulfate and polyethylene glycol is 20-
30:2-3:2-3:4-5:0.1-0.2:4-6:2-4。
In modified rubber powder of the present invention, by selecting waste rubber powder as raw material, resource utilization is effectively improved, is led to
Crossing selection sodium hydroxide, vinyltriethoxysilane and acetic anhydride is that modifying agent is composite modified to waste rubber powder progress, is obtained
The modified rubber powder performance arrived is stablized, rough surface, hydrophily and the cohesiveness enhancing between portland cement, portable sky
Gas, mixing has good bleed effect in concrete, is effectively improved the frost resistance of concrete, while it is equal as elastic filler
Even to be distributed in concrete, stronger deformability provides slow for the ice swelling pressure power and osmotic pressure that generate in frozen-thaw process
Space is rushed, the development in crack is slowed down, to further increase concrete frost resistance, and by rubber powder surface grafting second
Acid anhydrides effectively avoids waste rubber powder itself that the defect for causing compression strength to decline, modified rubber powder incorporation is added in concrete
Good " micro- reinforcement " effect is also acted as in concrete, further effectively prevent the problem of Cracking of concrete in the presence of a harsh environment；
Water-reducing agent during the preparation process, using ammonium persulfate as initiator, taken using hydroxy methyl methacrylate, methylpropene sodium sulfonate
For a certain proportion of acrylic acid, control system temperature and time for adding, 4- hydroxybutyl acrylate, 2- acrylic acid amido -2-
It polymerize between methyl propane sulfonic acid, acrylic acid and methyl allyl polyoxyethylene ether and esterification, in diminishing agent molecule knot
Active group such as hydroxyl, amido, ester group and sulfonic group are introduced in structure, its special molecular structure of the water-reducing agent of generation makes its tool
There are good dispersibility, dispersion retentivity and slump retaining, then add sodium thiosulfate and polyethylene glycol carries out compound, what is obtained subtracts
Aqua and other each component compatibilities in concrete are good, are effectively improved the pre-hardening effect of concrete mix, prevent bleeding, improve
Its density improves its uniformity, and the concrete after construction has preferable finish and flatness, and extraneous hazardous medium is difficult
It invades in inside concrete, impervious anti-corrosive properties are good, by that can also improve concrete structure, can significantly improve concrete of the present invention
Frost resistance and splitting resistance in the presence of a harsh environment effectively extend the service life of concrete, also effectively shorten feeding after constructing
Protect the time；Potassium water glass, expanded perlite, natural zeolite superfine powder, polypropylene fibre, glass fibre cooperation, play and well fill out
Effect is filled, harmful hole in concrete is reduced while improving concrete strength, so that the pore size distribution$ of concrete tends to close
Reason, compactness improve, effectively improve heatproof, splitting resistance and the shock resistance of concrete, improve its durability.It is proposed by the present invention
A kind of freeze proof anti-crack concrete, workability is good, and curing time shortens, while having good frost resistance and splitting resistance,
Effectively extend the service life of concrete in the presence of a harsh environment.
Specific embodiment
In the following, technical solution of the present invention is described in detail by specific embodiment.
Embodiment 1
A kind of freeze proof anti-crack concrete proposed by the present invention, raw material include: by weight 220 parts of portland cement,
20 parts of agstone, 35 parts of steel-making slag powder, 650 parts of sand, 850 parts of microlith, 25 parts of modified rubber powder, 8 parts of potassium water glass, expansion are precious
10 parts of pearl rock, 20 parts of natural zeolite superfine powder, 4 parts of polypropylene fibre, 3 parts of glass fibre, 5 parts of water-reducing agent, 100 parts of water.
Embodiment 2
A kind of freeze proof anti-crack concrete proposed by the present invention, raw material include: by weight 320 parts of portland cement,
10 parts of agstone, 50 parts of steel-making slag powder, 800 parts of sand, 700 parts of microlith, 45 parts of modified rubber powder, 15 parts of potassium water glass, expansion
15 parts of perlite, 15 parts of natural zeolite superfine powder, 6 parts of polypropylene fibre, 5 parts of glass fibre, 6 parts of water-reducing agent, 140 parts of water.
Wherein, the fineness modulus of sand is 1.8, and clay content is no more than 1.2wt%；
Modified rubber powder is prepared by following technique: waste rubber powder being placed in sodium hydrate aqueous solution and is impregnated, is taken
It washs out, is subsequently placed in dehydrated alcohol and impregnates, add vinyltriethoxysilane, acetic anhydride and initiator, stir, mistake
Filter is added acetone and carries out precipitation and separation, is washed out, dry, pulverize, obtain modified rubber powder；
Water-reducing agent is prepared by following technique: methyl allyl polyoxyethylene ether being mixed with deionized water, is warming up to
74 DEG C, hydroxy methyl methacrylate, methylpropene sodium sulfonate, acrylic acid and ammonium persulfate are added dropwise under stirring, when dropwise addition
Between be 3h, 82 DEG C are warming up to after being added dropwise to complete, continues to stir 30min, is then down to room temperature, regulation system pH to neutrality, then plus
Enter sodium thiosulfate and polyethylene glycol, obtains water-reducing agent.
Embodiment 3
A kind of freeze proof anti-crack concrete proposed by the present invention, raw material include: by weight 270 parts of portland cement,
15 parts of agstone, 44 parts of steel-making slag powder, 720 parts of sand, 780 parts of microlith, 35 parts of modified rubber powder, 12 parts of potassium water glass, expansion
12 parts of perlite, 18 parts of natural zeolite superfine powder, 5 parts of polypropylene fibre, 4.2 parts of glass fibre, 5.5 parts of water-reducing agent, water 120
Part.
Wherein, the fineness modulus of sand is 2.1, clay content 1wt%；
Modified rubber powder is prepared by following technique: waste rubber powder is placed in the sodium hydroxide that concentration is 16.5wt%
19h is impregnated in aqueous solution, is washed with clear water to neutrality after taking-up, is subsequently placed in dehydrated alcohol and impregnates 1.2h, adds ethylene
Ethyl triethoxy silicane alkane, acetic anhydride and initiator, in 72 DEG C of stirring 2.5h, filtering is added acetone and carries out precipitation and separation, then uses
Clear water washing, dry, pulverize at 72 DEG C, obtain the modified rubber powder that granularity is 75 mesh；Wherein, waste rubber powder, vinyl three
Weight ratio between Ethoxysilane, acetic anhydride and initiator is 25:1.2:4.5:0.15；Initiator by benzoyl peroxide and
Ammonium persulfate composition；
Water-reducing agent is prepared by following technique: methyl allyl polyoxyethylene ether being mixed with deionized water, is warming up to
76 DEG C, hydroxy methyl methacrylate, methylpropene sodium sulfonate, acrylic acid and ammonium persulfate are added dropwise under stirring, when dropwise addition
Between be 3.2h, 85 DEG C are warming up to after being added dropwise to complete, continues to stir 28min, is then down to room temperature, regulation system pH to neutrality, then
Sodium thiosulfate and polyethylene glycol is added, obtains water-reducing agent；Wherein, methyl allyl polyoxyethylene ether, 4- hydroxybutyl propylene
Weight between acid esters, 2- acrylic acid amido -2- methyl propane sulfonic acid, acrylic acid, ammonium persulfate, sodium thiosulfate and polyethylene glycol
Than for 25:2.5:2.5:4.5:0.15:4.5:3.
Embodiment 4
A kind of freeze proof anti-crack concrete proposed by the present invention, raw material include: by weight 240 parts of portland cement,
12 parts of agstone, 40 parts of steel-making slag powder, 760 parts of sand, 750 parts of microlith, 28 parts of modified rubber powder, 10 parts of potassium water glass, expansion
12 parts of perlite, 16.5 parts of natural zeolite superfine powder, 4.5 parts of polypropylene fibre, 3.5 parts of glass fibre, 5.2 parts of water-reducing agent, water
115 parts.
Wherein, the fineness modulus of sand is 2.4, clay content 1.2wt%；
Modified rubber powder is prepared by following technique: waste rubber powder is placed in the sodium hydroxide water that concentration is 15wt%
20h is impregnated in solution, is washed with clear water to neutrality after taking-up, is subsequently placed in dehydrated alcohol and impregnates 1.5h, adds vinyl
Triethoxysilane, acetic anhydride and initiator, in 70 DEG C of stirring 3h, filtering is added acetone and carries out precipitation and separation, then uses clear water
Washing, dry, pulverize at 70 DEG C, obtain the modified rubber powder that granularity is 70 mesh；Wherein, waste rubber powder, three ethoxy of vinyl
Weight ratio between base silane, acetic anhydride and initiator is 20:1:4:0.1；Initiator is by benzoyl peroxide and ammonium persulfate
Composition；
Water-reducing agent is prepared by following technique: methyl allyl polyoxyethylene ether being mixed with deionized water, is warming up to
78 DEG C, hydroxy methyl methacrylate, methylpropene sodium sulfonate, acrylic acid and ammonium persulfate are added dropwise under stirring, when dropwise addition
Between be 3.5h, 86 DEG C are warming up to after being added dropwise to complete, continues to stir 25min, is then down to room temperature, regulation system pH to neutrality, then
Sodium thiosulfate and polyethylene glycol is added, obtains water-reducing agent；Wherein, methyl allyl polyoxyethylene ether, 4- hydroxybutyl propylene
Weight between acid esters, 2- acrylic acid amido -2- methyl propane sulfonic acid, acrylic acid, ammonium persulfate, sodium thiosulfate and polyethylene glycol
Than for 20:2:3:4:0.1:4:2.
Embodiment 5
A kind of freeze proof anti-crack concrete proposed by the present invention, raw material include: by weight 300 parts of portland cement,
18 parts of agstone, 45 parts of steel-making slag powder, 680 parts of sand, 750 parts of microlith, 40 parts of modified rubber powder, 10 parts of potassium water glass, expansion
14 parts of perlite, 18 parts of natural zeolite superfine powder, 5.6 parts of polypropylene fibre, 4.8 parts of glass fibre, 5.6 parts of water-reducing agent, water 130
Part.
Wherein, the fineness modulus of sand is 2.2, clay content 0.8wt%；
Modified rubber powder is prepared by following technique: waste rubber powder is placed in the sodium hydroxide water that concentration is 18wt%
18h is impregnated in solution, is washed with clear water to neutrality after taking-up, is subsequently placed in dehydrated alcohol and impregnates 1h, and vinyl three is added
Ethoxysilane, acetic anhydride and initiator, in 75 DEG C of stirring 2h, filtering is added acetone and carries out precipitation and separation, then washed with clear water
It washs, dry, pulverize at 75 DEG C, obtain the modified rubber powder that granularity is 80 mesh；Wherein, waste rubber powder, vinyl triethoxyl
Weight ratio between silane, acetic anhydride and initiator is 30:1.5:5:0.2；Initiator is by benzoyl peroxide and ammonium persulfate
Composition；
Water-reducing agent is prepared by following technique: methyl allyl polyoxyethylene ether being mixed with deionized water, is warming up to
75 DEG C, hydroxy methyl methacrylate, methylpropene sodium sulfonate, acrylic acid and ammonium persulfate are added dropwise under stirring, when dropwise addition
Between be 3.4h, 84 DEG C are warming up to after being added dropwise to complete, continues to stir 26min, is then down to room temperature, regulation system pH to neutrality, then
Sodium thiosulfate and polyethylene glycol is added, obtains water-reducing agent；Wherein, methyl allyl polyoxyethylene ether, 4- hydroxybutyl propylene
Weight between acid esters, 2- acrylic acid amido -2- methyl propane sulfonic acid, acrylic acid, ammonium persulfate, sodium thiosulfate and polyethylene glycol
Than for 30:3:2:5:0.2:6:4.
Comparative example 1
A kind of concrete, compared with specific embodiment 3, difference is only in that removing modified rubber powder.
Comparative example 2
A kind of concrete, compared with specific embodiment 3, difference is only in that the modified rubber powder replacement in embodiment 3
For unmodified waste rubber powder.
Performance evaluation:
Frozen-thawed cycled comparative test is carried out after the concrete standard maintenance 28d of preparation, it is " common referring to GB/T50082-2009
Concrete long-term behaviour and endurance quality test method standard " in fast jelly method, after Frozen-thawed cycled 200 times, detect concrete
Mass loss rate and relative dynamic elastic modulus, test result is as shown in table 1, table 2；
Using flat plate mold research concrete bracing performance influence, sample dimensions be 600mm × 600mm ×
50mm；Test temperature is controlled at 20~23 DEG C；When test, first concrete mix is poured into flat plate mold and plugs and pounds molding, is smeared
Test specimen band mould is respectively placed in wind environment by flat surface, with the clearance gauge of special measurement fracture width to each concrete slab for 24 hours
The situation that cracks carries out tracking observation, and test result is as shown in table 3；
Mechanical performance of concrete is carried out referring to GB/T 50081-2002 " standard for test methods of mechanical properties of ordinary concrete "
Detection, test result are as shown in table 4.
The mass loss rate of 1 concrete of table
As shown in Table 1, in concrete incorporating modified rubber powder compared to not mixing and mix unmodified waste rubber powder,
The mass loss of its concrete is substantially reduced.
The relative dynamic elastic modulus of 2 concrete of table
| Embodiment | Relative dynamic elastic modulus/% |
| Embodiment 3 | 92.8 |
| Comparative example 1 | 48.2 |
| Comparative example 2 | 68.5 |
As shown in Table 2, in concrete incorporating modified rubber powder compared to not mixing and mix unmodified waste rubber powder,
The survivability of its concrete greatly improves.
The early-age crack result of 3 concrete of table
| Embodiment | The early-age crack time (h:min) | Maximum splits wide (mm) | Crack sum (item) |
| Embodiment 3 | 10:50 | 0.1 | 1 |
| Comparative example 1 | 7:40 | 1.6 | 10 |
| Comparative example 2 | 9:10 | 1.2 | 12 |
As shown in Table 3, in concrete incorporating modified rubber powder compared to not mixing and mix unmodified waste rubber powder,
Its cracking time that can effectively delay concrete reduces crack width, reduces crack number.
The mechanical property of 4 concrete of table
As shown in Table 4, the concrete of incorporating modified rubber powder is compared to the concrete for mixing unmodified waste rubber powder
For, the flexural strength and compression strength of concrete are improved；Although the concrete of incorporating modified rubber powder is not mixed compared to
For the concrete entered, the compression strength of concrete declines, but decline is unobvious, and at the same time, the flexural strength of concrete obtains
To slightly improving, good mechanical property is shown.
In conclusion other components cooperate in incorporating modified rubber powder, with concrete of the present invention in concrete, performance
Good frost resistance and splitting resistance out are adapted for carrying out production and application, have good market prospects.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (9)
1. a kind of freeze proof anti-crack concrete, which is characterized in that its raw material include: by weight 220-320 parts of portland cement,
10-20 parts of agstone, 35-50 parts of steel-making slag powder, 650-800 parts of sand, microlith be 700-850 parts sub-, 25-45 parts of modified rubber powder,
8-15 parts of potassium water glass, 10-15 parts of expanded perlite, 15-20 parts of natural zeolite superfine powder, 4-6 parts of polypropylene fibre, glass fibers
Tie up 3-5 parts, 5-6 parts of water-reducing agent, 100-140 parts of water.
2. freeze proof anti-crack concrete according to claim 1, which is characterized in that the fineness modulus of sand is 1.8-2.4, contains mud
Amount is no more than 1.2wt%.
3. freeze proof anti-crack concrete according to claim 1 or claim 2, which is characterized in that modified rubber powder by following technique into
Row preparation: waste rubber powder being placed in sodium hydrate aqueous solution and is impregnated, and is taken out washing, is subsequently placed in dehydrated alcohol and impregnates,
Vinyltriethoxysilane, acetic anhydride and initiator are added, is stirred, filtering is added acetone and carries out precipitation and separation, then washes
It washs, dry, pulverize, obtain modified rubber powder.
4. freeze proof anti-crack concrete described in any one of -3 according to claim 1, which is characterized in that modified rubber powder is by following
Prepared by technique: waste rubber powder being placed in the sodium hydrate aqueous solution that concentration is 15-18wt% and impregnates 18-20h, is taken out
It is washed afterwards with clear water to neutrality, is subsequently placed in dehydrated alcohol and impregnates 1-1.5h, add vinyltriethoxysilane, acetic acid
Acid anhydride and initiator, in 70-75 DEG C of stirring 2-3h, filtering is added acetone and carries out precipitation and separation, then washed with clear water, in 70-75
It DEG C dry, pulverize, obtain modified rubber powder.
5. freeze proof anti-crack concrete described in any one of -4 according to claim 1, which is characterized in that waste rubber powder, ethylene
Weight ratio between ethyl triethoxy silicane alkane, acetic anhydride and initiator is 20-30:1-1.5:4-5:0.1-0.2.
6. freeze proof anti-crack concrete described in any one of -5 according to claim 1, which is characterized in that initiator is by benzoyl peroxide
Formyl and ammonium persulfate composition.
7. freeze proof anti-crack concrete described in any one of -6 according to claim 1, which is characterized in that the granularity of modified rubber powder
For 70-80 mesh.
8. freeze proof anti-crack concrete described in any one of -7 according to claim 1, which is characterized in that water-reducing agent presses following technique
It is prepared: methyl allyl polyoxyethylene ether being mixed with deionized water, is warming up to 74-78 DEG C, is added dropwise under stirring
Hydroxy methyl methacrylate, methylpropene sodium sulfonate, acrylic acid and ammonium persulfate, time for adding 3-3.5h, after being added dropwise to complete
It is warming up to 82-86 DEG C, continues to stir 25-30min, is then down to room temperature, regulation system pH to neutrality adds sodium thiosulfate
And polyethylene glycol, obtain water-reducing agent.
9. freeze proof anti-crack concrete described in any one of -8 according to claim 1, which is characterized in that water-reducing agent preparation process
In, methyl allyl polyoxyethylene ether, 4- hydroxybutyl acrylate, 2- acrylic acid amido -2- methyl propane sulfonic acid, acrylic acid,
Weight ratio between ammonium persulfate, sodium thiosulfate and polyethylene glycol is 20-30:2-3:2-3:4-5:0.1-0.2:4-6:2-4.
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| CN110117179A (en) * | 2019-06-06 | 2019-08-13 | 北京泽华路桥工程有限公司 | A kind of environmental protection anti-freezing type concrete and preparation method thereof |
| CN110606714A (en) * | 2019-09-24 | 2019-12-24 | 武汉科技大学 | Anti-freezing concrete with glass fiber and modified rubber and preparation method thereof |
| CN110922094A (en) * | 2019-12-24 | 2020-03-27 | 中国水利水电科学研究院 | Cemented sand gravel admixture and preparation method thereof |
| CN111574155A (en) * | 2020-05-26 | 2020-08-25 | 陈佩丽 | Efficient anti-cracking multifunctional concrete mortar and preparation process thereof |
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| CN110117179A (en) * | 2019-06-06 | 2019-08-13 | 北京泽华路桥工程有限公司 | A kind of environmental protection anti-freezing type concrete and preparation method thereof |
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| CN111574155A (en) * | 2020-05-26 | 2020-08-25 | 陈佩丽 | Efficient anti-cracking multifunctional concrete mortar and preparation process thereof |
| CN111574155B (en) * | 2020-05-26 | 2021-05-04 | 上海於鑫建筑材料有限公司 | Preparation process of efficient anti-cracking multifunctional concrete mortar |
| CN112921798A (en) * | 2021-04-06 | 2021-06-08 | 孙正东 | Construction method of bridge expansion joint |
| CN113248213A (en) * | 2021-06-15 | 2021-08-13 | 天津伟业建筑材料有限公司 | Preparation method of anti-freezing recycled concrete material |
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