CN109467363A - A kind of high-strength water-permeable concrete - Google Patents
A kind of high-strength water-permeable concrete 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
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
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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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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
- C04B2111/2038—Resistance against physical degradation
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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
- C04B2111/40—Porous or lightweight 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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Abstract
The invention discloses a kind of high-strength water-permeable concrete, belong to technical field of concrete, its key points of the technical solution are that a kind of high-strength water-permeable concrete includes following component: cement, coarse aggregate, reinforcing fiber, water-reducing agent and water；The reinforcing fiber includes vinal, lignin fibre and the modified bamboo fiber that weight ratio is 2:1:1.Modified bamboo fiber is made in bamboo fibre after pretreatment and chemical modification in the present invention, after vinal and lignin fibre cooperation, the adhesive force of fiber, aggregate and cement can be enhanced, increase the compression strength and wear-resisting property of concrete, the service life that concrete can be extended is suitable for road concrete use；And lignin fibre and bamboo fibre belong to plant fiber, and the cross-sectional area of fiber has many holes, can improve its water penetration while improving concrete crushing strength.
Description
Technical field
The present invention relates to technical field of concrete, more specifically, it is related to a kind of high-strength water-permeable concrete.
Background technique
Concrete be from cementitious material, aggregate and water according to a certain percentage with, by stirring obtained by engineering it is compound
Material；According to the difference for using function, it is mixed that concrete can be divided into structural concrete, thermal insulation concrete, architectural concrete, waterproof
Solidifying soil, refractory concrete, concrete for hydraulic structure, maritime concrete, road concrete, radiation shield concrete and water penetration coagulation
Soil.The problem of in order to alleviate city " tropical island effect " and alleviate the level of ground water decline in city, permeable concrete is as road
Road concrete using more and more extensive；Since pervious concrete is one as made of cement, aggregate, reinforcing agent and water mix
Kind of porous light concrete, inside can form the equally distributed honeycomb structure in hole, rainwater can be allowed to flow into underground, had
The problem of imitating recharge of groundwater, alleviating the level of ground water decline in city.
In the prior art, application No. is 201310270500.2 patent document, disclose kind a kind of pervious concrete and
Preparation method, component mainly include cement, aggregate, mineral admixture, water, adhesive, concrete admixture, the invention
The strength grade of pervious concrete reaches C30, and coefficient of permeability is greater than 2mm/s, and freeze thawing resistance grade is F150.
But there are the contradictions of intensity and water penetration for current pervious concrete, and working performance is poor, limit permeable
The use of concrete, therefore the intensity of permeable concrete how is improved, it is a problem to be solved.
Summary of the invention
The purpose of the present invention is to provide a kind of high-strength water-permeable concrete, fine by modified bamboo fiber and polyvinyl alcohol
After dimension and lignin fibre cooperation, the adhesive force of fiber, aggregate and cement can be enhanced, increase the pressure resistance of concrete
Degree；And and lignin fibre and bamboo fibre belong to plant fiber, the cross-sectional area of fiber has many holes, is mentioning
Also there is good good water permeability while for intensity.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of high-strength water-permeable concrete, parts by weight meter, including following component: 140-160 parts of cement, coarse aggregate 800-900
Part, 20-30 parts of reinforcing fiber, 2-4 parts of water-reducing agent and 100-120 parts of water；The reinforcing fiber includes that weight ratio is 2:1:1's
Vinal, lignin fibre and modified bamboo fiber；
The modified bamboo fiber is prepared with the following method: based on parts by weight:
1. pretreatment: bamboo fibre being immersed in the sodium hydroxide solution of 8-10wt%, the weight ratio of bamboo fibre and sodium hydroxide
For 1:20；At a temperature of 40-50 DEG C, 20-24h is impregnated；Then bamboo fibre is cleaned with the ethanol solution of 50wt%, when clear
After the pH of washing lotion is 7-8, at a temperature of bamboo fibre is placed in 100-110 DEG C, dry 10-12h obtains pretreatment bamboo fibre；
2. prepared by modification liquid: by 0.4-0.6 parts of aminopropyl triethoxysilane, 1-2 parts of methyl diphenylene diisocyanate, ethyl
2-3 parts of cellulose and 0.2-0.4 parts of propandiol butyl ether are dissolved in 50-60 parts of acetone, are stirred with the speed of 300-500r/min
20-30min obtains modification liquid；
3. chemical modification: by step 1. in pretreatment bamboo fibre be immersed in step 2. in modification liquid in, pre-process bamboo fibre
Weight ratio with modification liquid is 1:10；Under conditions of temperature is 60-70 DEG C, supersonic frequency is 20-30kHz, 2-4h is impregnated；So
It is filtered under diminished pressure under conditions of pressure is 0.09-0.095MPa afterwards, at a temperature of bamboo fibre is placed in 90-100 DEG C, dry 5-
6h obtains modified bamboo fiber.
By using above-mentioned technical proposal, the intensity of concrete is can be improved in framework material of the aggregate as concrete；Through
Pretreated bamboo fibre is crossed, the polarity of fiber surface increases, and the active group on surface increases, and is conducive to improve modified effect
Rate；After the chemical modification of modification liquid, the strength and toughness of obtained bamboo fibre increases, and the dispersion performance in cement is good,
Enhance with the bonding force of cement, the adhesive strength of lignin fibre and cement can be improved；Pass through modified bamboo fiber and polyethylene
After alcohol fiber and lignin fibre cooperation, the adhesive force of fiber, aggregate and cement can be improved, increase the resistance to compression of concrete
Intensity, bending strength, wear-resisting property and anti-freezing property can when concrete is used for road concrete in use, wear-resisting property is good
To extend the service life of concrete；And and lignin fibre and bamboo fibre belong to plant fiber, the cross section of fiber
Product has many holes, also has good good water permeability while providing intensity.
Further, the coarse aggregate includes rubble, natural zeolite and the haydite that weight ratio is 3:1:1.
By using above-mentioned technical proposal, in order to guarantee the water penetration of concrete, therefore it is larger using partial size in its raw material
Rubble, haydite and natural zeolite；Rubble quality is hard, can be used as the skeleton of concrete, improves the intensity of concrete；Pottery
The inner structural features of grain are in fine and closely woven honeycomb micropore, and the main component of natural zeolite is sodium aluminosilicate, and natural zeolite has
Rack-like structure, the cavity contained in natural zeolite are conducive to passing through for moisture；Pass through matching for rubble, haydite and natural zeolite
It closes, on the one hand can be used as the skeleton of concrete, improve the intensity of concrete, on the other hand, internal hole is also beneficial to
Moisture passes through, and can play good permeable effect.
Further, the partial size of the rubble is 5-20mm continuous grading, and the apparent density of rubble is 2820-2830kg/
m3, loosely-packed porosity is 40-45%, loose bulk density 1550-1560kg/m3。
By using above-mentioned technical proposal, rubble of the rubble using continuous grading, the rubble accumulation shape of different-grain diameter
At the overlap joint skeleton of dense packing effect, the intensity of concrete can be improved；But due in raw material do not contain fine aggregate, rubble it
Between still can make concrete that there is good permeable effect there are the gap that passes through of water supply.
Further, the haydite is the coal gangue haydite that partial size is 5-10mm continuous grading, and particle shape is spheroidal haydite,
Bulk density is 920-940kg/m3, tight packing density 970-990kg/m3, apparent density 1730-1790kg/m3。
By using above-mentioned technical proposal, gangue is the solid waste in mining, and coal gangue haydite is will to meet
The gangue of expansion requirements belongs to environmentally friendly class product, can mitigate the weight of concrete, saving is produced by process for producing
This；Improve the anti-freezing property of concrete.
Further, the partial size of the natural zeolite is 4-6mm.
By using above-mentioned technical proposal, coarse aggregate of the partial size for the natural zeolite of 4-6mm as concrete is used, it can be with
Improve the water permeability of concrete.
Further, the length of the vinal is 4-6mm, fiber number 1.5-2.0D.
By using above-mentioned technical proposal, vinal has good mechanical performance, has high-intensitive, Gao Mo
Amount, acid-alkali-corrosive-resisting are not easy mouldy advantage, and the compatibility of vinal and cement is good, are not easy adhesion, and bonding is strong
Degree is high, can effectively improve the intensity of concrete.
Further, the lignin fibre is graininess lignin fibre, length 4-6mm, bulk density 350-
400kg/m3。
By using above-mentioned technical proposal, granular lignin fibre can be used as the stabilizer in concrete, have
Good toughness, dispersibility and water imbibition, can be improved the water permeability of concrete.
Further, the water-reducing agent polycarboxylic acid series high efficiency water reducing agent.
By using above-mentioned technical proposal, polycarboxylic acid series high efficiency water reducing agent has preferable plasticizing water-reducing effect to cement, can
To improve the performance of maturing, there is absorption peptizaiton well, the workability of concrete can be improved.
Further, the cement is the ordinary portland cement of P.O.42.5.
By using above-mentioned technical proposal, ordinary portland cement has the advantages that intensity height, good frost resistance, by subtracting
The addition of aqua can alleviate the big defect of its heat of hydration.
In conclusion the present invention has the advantages that compared with the prior art
1. fiber, aggregate and cement can be enhanced after modified bamboo fiber and the cooperation of vinal and lignin fibre
Adhesive force increases compression strength, bending strength, wear-resisting property and the frost resistance of concrete, when concrete is mixed for road
Solidifying soil can extend the service life of concrete in use, wear-resisting property is good；And and lignin fibre is belonged to bamboo fibre
The cross-sectional area of plant fiber, fiber has many holes, and it is permeable that its can be also improved while improving concrete strength
Performance；
2. passing through the cooperation of rubble, haydite and natural zeolite, it on the one hand can be used as the skeleton of concrete, improve concrete
Intensity, on the other hand, internal hole are also beneficial to moisture and pass through, and can play good permeable effect.
Specific embodiment
Invention is further described in detail below.
Water-reducing agent in following embodiment uses the high property of HSC polycarboxylic acids of Qingdao Hong Sha high molecular material Co., Ltd production
It can water-reducing agent.
One, the preparation example of modified bamboo fiber
Preparation example 1: it 1. pre-processes: 2kg bamboo fibre is immersed in the sodium hydroxide solution of 20kg, 8wt%；In 40 DEG C of temperature
Under, impregnate 20h；Then bamboo fibre is cleaned with the ethanol solution of 50wt%, after the pH of cleaning solution is 7, by bamboo fibre
It is placed at a temperature of 100 DEG C, dry 10h obtains pretreatment bamboo fibre；
2. prepared by modification liquid: by aminopropyl triethoxysilane 0.4kg, methyl diphenylene diisocyanate 1kg, ethyl cellulose
2kg and propandiol butyl ether 0.2kg are dissolved in 50kg acetone, are stirred 20min with the speed of 300r/min, are obtained modification liquid；
3. chemical modification: take 1kg step 1. in pretreatment bamboo fibre, be immersed in 10kg step 2. in modification liquid in；
Under conditions of temperature is 60 DEG C, supersonic frequency is 20kHz, 2h is impregnated；Then it was depressurized under conditions of pressure is 0.09MPa
Filter, at a temperature of bamboo fibre is placed in 90 DEG C, dry 5h obtains modified bamboo fiber.
Preparation example 2: it 1. pre-processes: 2kg bamboo fibre is immersed in the sodium hydroxide solution of 20kg, 9wt%；In 45 DEG C of temperature
Under degree, 22h is impregnated；Then bamboo fibre is cleaned with the ethanol solution of 50wt%, after the pH of cleaning solution is 7, by bamboo fibre
Dimension is placed at a temperature of 105 DEG C, and dry 11h obtains pretreatment bamboo fibre；
2. prepared by modification liquid: by aminopropyl triethoxysilane 0.5kg, methyl diphenylene diisocyanate 1.5kg, ethyl cellulose
Plain 2.5kg and propandiol butyl ether 0.3kg are dissolved in 55kg acetone, are stirred 25min with the speed of 400r/min, are modified
Liquid；
3. chemical modification: take 1kg step 1. in pretreatment bamboo fibre, be immersed in 10kg step 2. in modification liquid in；
Under conditions of temperature is 65 DEG C, supersonic frequency is 25kHz, 3h is impregnated；Then it is depressurized under conditions of pressure is 0.093MPa
Filtering, at a temperature of bamboo fibre is placed in 95 DEG C, dry 5.5h obtains modified bamboo fiber.
Preparation example 3: it 1. pre-processes: 2kg bamboo fibre is immersed in the sodium hydroxide solution of 20kg, 10wt%；At 50 DEG C
At a temperature of, it impregnates for 24 hours；Then bamboo fibre is cleaned with the ethanol solution of 50wt%, after the pH of cleaning solution is 8, by bamboo
Fiber is placed at a temperature of 110 DEG C, and dry 12h obtains pretreatment bamboo fibre；
2. prepared by modification liquid: by aminopropyl triethoxysilane 0.6kg, methyl diphenylene diisocyanate 2kg, ethyl cellulose
3kg and propandiol butyl ether 0.4kg are dissolved in 60kg acetone, are stirred 30min with the speed of 500r/min, are obtained modification liquid；
3. chemical modification: take 1kg step 1. in pretreatment bamboo fibre, be immersed in 10kg step 2. in modification liquid in；
Under conditions of temperature is 70 DEG C, supersonic frequency is 30kHz, 4h is impregnated；Then it is depressurized under conditions of pressure is 0.095MPa
Filtering, at a temperature of bamboo fibre is placed in 100 DEG C, dry 6h obtains modified bamboo fiber.
Preparation example 4: this preparation example and preparation example 1 the difference is that, bamboo fibre only passes through the processing of step 1..
Preparation example 5: this preparation example and preparation example 1 the difference is that, step 2. in modification liquid only include aminopropyl three
Ethoxysilane and acetone.
Two, embodiment
Embodiment 1: a kind of high-strength water-permeable concrete, including following component: the ordinary portland cement 140kg of P.O.42.5,
Rubble 480kg, haydite 160kg, natural zeolite 160kg, vinal 10kg, lignin fibre 5kg, modified bamboo fiber
5kg, polycarboxylic acid series high efficiency water reducing agent 2kg and water 100kg, prepared by the preparation example 1 that modified bamboo fiber is selected from modified bamboo fiber
Modified bamboo fiber；Wherein, the partial size of rubble is 5-20mm continuous grading, and the apparent density of rubble is 2820kg/m3, loosely-packed
Porosity is 40%, loose bulk density 1550kg/m3；Haydite is the coal gangue haydite that partial size is 5-10mm continuous grading,
Particle shape is spheroidal haydite, bulk density 920kg/m3, tight packing density 970kg/m3, apparent density 1730kg/
m3；The partial size of natural zeolite is 4mm；The length of vinal is 4mm, fiber number 1.5D；Lignin fibre is graininess
Lignin fibre, length 4mm, bulk density 350kg/m3。
Embodiment 2: a kind of high-strength water-permeable concrete, including following component: the ordinary portland cement of P.O.42.5
150kg, rubble 510kg, haydite 170kg, natural zeolite 170kg, vinal 12.5kg, lignin fibre 6.25kg,
Modified bamboo fiber 6.25kg, polycarboxylic acid series high efficiency water reducing agent 3kg and water 110kg, modified bamboo fiber are selected from modified bamboo fiber
Modified bamboo fiber prepared by preparation example 2；Wherein, the partial size of rubble is 5-20mm continuous grading, and the apparent density of rubble is
2825kg/m3, loosely-packed porosity is 43%, loose bulk density 1555kg/m3；Haydite is that partial size is 5-10mm continuous
The coal gangue haydite of gradation, particle shape are spheroidal haydite, bulk density 930kg/m3, tight packing density 980kg/m3, table
Sight density is 1760kg/m3；The partial size of natural zeolite is 5mm；The length of vinal is 5mm, fiber number 1.8D；It is wooden
Cellulose fiber is graininess lignin fibre, length 5mm, bulk density 375kg/m3。
Embodiment 3: a kind of high-strength water-permeable concrete, including following component: the ordinary portland cement of P.O.42.5
160kg, rubble 480kg, haydite 180kg, natural zeolite 180kg, vinal 15kg, lignin fibre 7.5kg, modification
Bamboo fibre 7.5kg, polycarboxylic acid series high efficiency water reducing agent 4kg and water 120kg, modified bamboo fiber are selected from the preparation example of modified bamboo fiber
The modified bamboo fiber of 3 preparations；Wherein, the partial size of rubble is 5-20mm continuous grading, and the apparent density of rubble is 2830kg/m3,
Loosely-packed porosity is 45%, loose bulk density 1560kg/m3；Haydite is the bastard coal that partial size is 5-10mm continuous grading
Stone haydite, particle shape are spheroidal haydite, bulk density 940kg/m3, tight packing density 990kg/m3, apparent density is
1790kg/m3；The partial size of natural zeolite is 6mm；The length of vinal is 6mm, fiber number 2.0D；Lignin fibre is
Graininess lignin fibre, length 6mm, bulk density 400kg/m3。
High-strength water-permeable concrete component table (unit: kg) in 1 embodiment 1-3 of table
Three, comparative example
Comparative example 1: this comparative example and implement 1 the difference is that, in the raw material of concrete do not include reinforcing fiber.
Comparative example 2: this comparative example difference from example 1 is that, in reinforcing fiber only include modified bamboo fiber.
Comparative example 3: this comparative example difference from example 1 is that, only comprising weight ratio be 3:1 in reinforcing fiber
Vinal and lignin fibre.
Comparative example 4: this comparative example difference from example 1 is that, it is fine with the common non-modified bamboo of equivalent
Dimension replaces the modified bamboo fiber in preparation example 1.
Comparative example 5: this comparative example difference from example 1 is that, modified bamboo fiber be selected from preparation example 4 prepare change
Property bamboo fibre.
Comparative example 6: this comparative example difference from example 1 is that, modified bamboo fiber be selected from preparation example 5 prepare change
Property bamboo fibre.
Four, performance test mixes each raw material according to the raw material proportioning of the middle concrete of embodiment 1-3 and comparative example 1-6
After closing uniformly, concrete is made, according to specification CJJ/T135-2009 " pervious concrete pavement testing regulations ", to embodiment 1-3
And the performance of the concrete in comparative example 1-6 is tested, and table 2 is shown the result in.
The performance test table of the pervious concrete of table 2 embodiment 1-3 and comparative example 1-6 preparation
Concrete of the invention has both excellent compression strength, bending strength and water permeability it can be seen from 2 data of table,
Compression strength can achieve C50 grade；In addition, the wear-resisting property of concrete of the invention is good, when it makes as road concrete
The surface abrasion of used time, concrete are small, can extend the service life of concrete；And concrete of the invention is in addition to excellent
Outside different water penetration, also there is good frost resistance, frost resistance refers to is amenable to thawing ringing under saturation state
Without destroying, intensity also not significantly reduced property illustrates that concrete of the invention is suitable for cold area, has more wide
General use environment.
Reinforcing fiber is not contained in comparative example 1, it is the wear-resisting property of concrete in comparative example 1, permeable compared to embodiment 1
Coefficient, frost resistance, porosity, compression strength and bending strength are substantially reduced, and illustrate that the addition of reinforcing fiber can obviously change
The above performance of kind concrete.
Reinforcing fiber in comparative example 2 only includes modified bamboo fiber, and compared to embodiment 1, concrete is resistance in comparative example 2
Mill performance still reduces significantly, and illustrates vinal in reinforcing fiber and lignin fibre and used time, can
To be obviously improved the wear-resisting property of concrete；And coefficient of permeability, frost resistance, porosity, compression strength in comparative example 1 and curved
Qu Qiangdu has reduction more by a small margin, illustrates that the modified bamboo fiber in reinforcing fiber can effectively improve the permeable of concrete
Property, frost resistance, porosity, compression strength and bending strength.
The vinal and lignin fibre for being only 3:1 comprising weight ratio in comparative example 3, compared to embodiment 1,
The frost resistance, compression strength and bending strength of concrete are substantially reduced in comparative example 3, illustrate that modified bamboo fiber is clearly helpful for
Improve frost resistance, compression strength and the bending strength of concrete；Compared to embodiment 1, there is the abrasion of concrete in comparative example 3
Increasing more by a small margin, illustrates that the wear-resisting property of concrete can be improved in modified bamboo fiber；Compared to embodiment 1, in comparative example 3
The coefficient of permeability and porosity of concrete are declined, and coefficient of permeability of the comparative example 2 relative to concrete in embodiment 1
And porosity is also declined, and illustrates that polyethylene fibre and lignin fibre and modified bamboo fiber are conducive to improve coagulation
The water permeability of soil.
The common non-modified bamboo fibre that modified bamboo fiber is replaced with to equivalent in comparative example 4, compared to embodiment 1,
Frost resistance, compression strength and the bending strength of concrete are substantially reduced, and illustrate that the bamboo fibre after modification can be shown
Write frost resistance, compression strength and the bending strength for improving concrete.
Modified bamboo fiber in comparative example 5 only passes through pretreated step, compared to embodiment 1, the frost resistance of concrete,
Compression strength and bending strength are substantially reduced；Compared to comparative example 4, the compression strength of concrete increases, and illustrates process
The compression strength of concrete can be improved in pretreated bamboo fibre；Compared to comparative example 4, the wear-resisting property of concrete have compared with
Raising by a small margin illustrates to interact by pretreated bamboo fibre and vinal and lignin fibre, can
To improve the wear-resisting property of concrete.
Modification liquid in comparative example 6 only includes aminopropyl triethoxysilane and acetone, compared to embodiment 1, coagulation
The frost resistance and bending strength of soil still reduce significantly, and illustrates by modification liquid of the invention treated bamboo fibre
Dimension, can be improved the frost resistance and bending strength of concrete；Compared to embodiment 1, the compression strength of concrete in comparative example 6
Still it decreases, illustrates to can also be improved the compression strength of concrete by modification liquid of the invention treated bamboo fibre.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (9)
1. a kind of high-strength water-permeable concrete, it is characterised in that: based on parts by weight, including following component:
140-160 parts of cement, 800-900 parts of coarse aggregate, 20-30 parts of reinforcing fiber, 2-4 parts of water-reducing agent and 100-120 parts of water；
The reinforcing fiber includes vinal, lignin fibre and the modified bamboo fiber that weight ratio is 2:1:1；
The modified bamboo fiber is prepared with the following method: based on parts by weight:
1. pretreatment: bamboo fibre being immersed in the sodium hydroxide solution of 8-10wt%, the weight ratio of bamboo fibre and sodium hydroxide is
1:20；At a temperature of 40-50 DEG C, 20-24h is impregnated；Then bamboo fibre is cleaned with the ethanol solution of 50wt%, works as cleaning
After the pH of liquid is 7-8, at a temperature of bamboo fibre is placed in 100-110 DEG C, dry 10-12h obtains pretreatment bamboo fibre；
2. prepared by modification liquid: by 0.4-0.6 parts of aminopropyl triethoxysilane, 1-2 parts of methyl diphenylene diisocyanate, ethyl
2-3 parts of cellulose and 0.2-0.4 parts of propandiol butyl ether are dissolved in 50-60 parts of acetone, are stirred with the speed of 300-500r/min
20-30min obtains modification liquid；
3. chemical modification: by step 1. in pretreatment bamboo fibre be immersed in step 2. in modification liquid in, pre-process bamboo fibre
Weight ratio with modification liquid is 1:10；Under conditions of temperature is 60-70 DEG C, supersonic frequency is 20-30kHz, 2-4h is impregnated；So
It is filtered under diminished pressure under conditions of pressure is 0.09-0.095MPa afterwards, at a temperature of bamboo fibre is placed in 90-100 DEG C, dry 5-
6h obtains modified bamboo fiber.
2. a kind of high-strength water-permeable concrete according to claim 1, it is characterised in that: the coarse aggregate includes weight ratio
For the rubble, natural zeolite and haydite of 3:1:1.
3. a kind of high-strength water-permeable concrete according to claim 2, it is characterised in that: the partial size of the rubble is 5-
20mm continuous grading, the apparent density of rubble are 2820-2830kg/m3, loosely-packed porosity is 40-45%, and loosely-packed is close
Degree is 1550-1560kg/m3。
4. a kind of high-strength water-permeable concrete according to claim 2, it is characterised in that: the haydite is that partial size is 5-
The coal gangue haydite of 10mm continuous grading, particle shape are spheroidal haydite, bulk density 920-940kg/m3, tight packing density
For 970-990kg/m3, apparent density 1730-1790kg/m3。
5. a kind of high-strength water-permeable concrete according to claim 2, it is characterised in that: the partial size of the natural zeolite is
4-6mm。
6. a kind of high-strength water-permeable concrete according to claim 1, it is characterised in that: the length of the vinal
Degree is 4-6mm, fiber number 1.5-2.0D.
7. a kind of high-strength water-permeable concrete according to claim 1, it is characterised in that: the lignin fibre is particle
Shape lignin fibre, length 4-6mm, bulk density 350-400kg/m3。
8. a kind of high-strength water-permeable concrete according to claim 1, it is characterised in that: the water-reducing agent is polycarboxylic-acid
High efficiency water reducing agent.
9. a kind of high-strength water-permeable concrete according to claim 1, it is characterised in that: the cement is P.O.42.5's
Ordinary portland cement.
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| CN113233837A (en) * | 2021-05-18 | 2021-08-10 | 柳晶（溧阳）环保科技有限公司 | Water permeable brick prepared from ceramsite |
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