CN105669077B - A kind of permeable additive of pervious concrete and preparation method thereof - Google Patents

A kind of permeable additive of pervious concrete and preparation method thereof Download PDF

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Publication number
CN105669077B
CN105669077B CN201610077145.0A CN201610077145A CN105669077B CN 105669077 B CN105669077 B CN 105669077B CN 201610077145 A CN201610077145 A CN 201610077145A CN 105669077 B CN105669077 B CN 105669077B
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parts
permeable
pervious concrete
wood plant
plant fibre
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CN105669077A (en
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李振川
龚新杰
董武成
郭键
何威
闻珂
张耀芳
孙莉
徐猛
班攀攀
时飞翔
孙飞
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Zhoukou Highway Survey and Design Institute
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Zhoukou Highway Survey And Design Institute
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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
    • 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
    • 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
    • C04B20/04—Heat treatment
    • 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
    • C04B20/04—Heat treatment
    • C04B20/06—Expanding clay, perlite, vermiculite or like granular 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
    • 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
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The present invention proposes a kind of permeable additive of pervious concrete, it is characterized in that, the non-wood plant fibre with capillary pervious function, its raw material is made up of by weight following each component：50 70 parts of non-wood plant fibre, 25 35 parts of porous material, 35 parts of the hydrosol, 0.8 1.2 parts of dispersant, 0.6 1.0 parts of water reducer, 0.5 1.0 parts of activating agent.The concrete additive is using non-wood plant fibre to form main body, pass through modification, improve porosity, permeable amount and the hydrophily of non-wood plant fibre element, the permeable additive of the present invention is set to use no or little coarse aggregate for preparing pervious concrete, after firm entirety is formed with concrete, while pervious concrete porosity and permeable amount is improved, it is ensured that the intensity of concrete, wearability, can be applied to the top load road concrete such as urban road and highway.

Description

A kind of permeable additive of pervious concrete and preparation method thereof
Technical field
The present invention relates to technical field of concrete additives, and in particular to a kind of permeable additive of pervious concrete and its system Preparation Method.
Background technology
21 beginnings of the century, China concrete field technical staff begin one's study using pervious concrete, and in park, people's row Equivalent-load burden requirement not high region in road starts progressively to use.Pervious concrete is a kind of coarse porous concrete, it is general using compared with Big particle diameter gathers materials as skeleton, and being wrapped in surface of aggregate using cementing material forms skeleton, is reached using hole caused by skeleton The purpose of infiltration.Because pervious concrete needs to ensure enough porous passages, its density of load, wearability are difficult to reach It is required that therefore existing pervious concrete be mostly applied to the relatively low auxiliary road of load, hinder pervious concrete in urban road and The use of highway.The problem of pervious concrete water penetration and intensity contradict, turn into and hinder pervious concrete sharp on a large scale Bottleneck.
Chinese invention patent application number 201010185569.1 discloses a kind of pervious concrete and preparation method thereof, the hair It is bright that preparation process is as follows:A kind of composite gelled material is made first, its raw material composition and weight percent proportioning are:Cement 70~ 88%, concrete ash 10~30%, latex powder 1~5%, weigh and be stirred by raw material proportioning, composite gelled material is made, it is standby.So Prepare pervious concrete again afterwards, its raw material composition and weight percent proportioning are:Above-mentioned composite gelled material 10~25%, regeneration Aggregate 70~85%, water 4~9%;A kind of pervious concrete is obtained after stirring.The pervious concrete Coefficient of permeability is but the pervious concrete compression strength prepared by the invention more than or equal to 2mm/s, using limited.
Chinese invention patent application number 201410031765.1 discloses a kind of Sand-free permeable concrete additive and its system Preparation Method, the invention provide a kind of Sand-free permeable concrete additive, the additive by following weight percentage raw material group Into：Flyash 30-50%, ground granulated blast furnace slag 20-30%, wollastonite powder 10-15%, latex powder 3-8%.The invention additionally provides a kind of nothing The preparation method of sand pervious concrete additive, reduce Sand-free permeable concrete additive production cost；Improve permeable mixed without sand The water permeability of soil is coagulated, but the coarse aggregate such as the invention flyash, ground granulated blast furnace slag and wollastonite powder for using causes intensity still difficult To meet top load road, the terrace ground in pavement, square and parking lot is served only for.
Chinese invention patent application number 201210008468.6 discloses High-strength permeable fiber concrete and preparation method thereof, The kind High-strength permeable fiber concrete of the disclosure of the invention, including cement, additive, water and stone, it is fine also to include high-strength engineering Dimension, the high-strength technical fiber are more than the 3% of cement weight, and less than the 8 ‰ of concrete gross weight, the Preparation Method of the invention Organically to be combined common pervious concrete and fiber pervious concrete technology, produce a kind of high intensity, freeze-thawing resistant it is new The freeze proof pervious concrete technology of type, this technology are applied and can greatly improve construction quality in northern frore area and make the dimension of road Shield and repair rate lower significantly, but because the technical fiber permeable amount of use is small, reduce the permeable efficiency of pervious concrete.
Analyzed more than, because pervious concrete is mostly the macroscopic void that coarse aggregate is formed, water penetration is difficult to intensity Balance, causes current pervious concrete use range to be limited, and limit is applied to light pavement usage（Such as pavement, parking lot, park Deng）, the concrete road surface of the large area such as urban road, highway for top load, according to prior art pervious concrete Intensity, wearability be unable to reach requirement, limit the application of pervious concrete wider scope.Therefore, it is permeable mixed in order to solve The problem of native water penetration and intensity contradict is coagulated, improves the combination property of pervious concrete, can be in top load road Use, there is an urgent need to the good pervious concrete specialist additive of a kind of easy to use, intensity, wearability, water permeability.
The content of the invention
For current pervious concrete intensity difference, wear no resistance, bad hydraulic permeability, it is difficult to should in urban road and highway With the defects of, the present invention proposes a kind of permeable additive of pervious concrete and preparation method thereof, and the concrete permeable additive is Using non-wood plant fibre to form main body, by modification, the plain porosity of non-wood plant fibre, permeable amount are improved And hydrophily, it is possessed capillary pervious function；The permeable additive of the present invention for prepare pervious concrete can not have to or Coarse aggregate is used less, after firm entirety is formed with concrete, while pervious concrete porosity and permeable amount is improved, also Intensity, the wearability of concrete are ensure that, can be applied to the top load road concrete such as urban road and highway.
A kind of permeable additive of pervious concrete of the present invention, it is characterised in that the non-timber containing capillary pervious function is planted Fibres raw material, it is made up of by weight following each component：
Non-wood plant fibre 50-70 parts,
Porous material 25-35 parts,
Hydrosol 3-5 parts,
Dispersant 0.8-1.2 parts,
Water reducer 0.6-1.0 parts,
Activating agent 0.5-1.0 parts,
Specific make step is as follows：
1）The non-wood plant fibre that parts by weight are 80-90 is disperseed in the homogenizer that temperature is 160-200 DEG C, Expand 5-10min, mixer rotating speed 300-500rpm；
2）By step 1）Obtained non-wood plant fibre temperature in high-temperature calcination stove is to be carbonized at 800-1000 DEG C The 0.5-2.0 seconds, consolidate non-wood plant fibre macropore duct；
3）By step 2）Obtained non-wood plant fibre is added to acetic anhydride and 1- acrylic -3- methyl ammonia mixes for imidazoles Close in solution, during the lower immersion 1-2h activation modifications that temperature is 80-100 DEG C, activation modification, in non-wood plant fibre Abundant micropore canals are introduced on macropore hole wall, and network pore passage structure is formed with macropore duct, lifting non-wood plant is fine The porosity and permeable amount of dimension；Filtering, drying, obtains the non-wood plant fibre with capillary pervious function；
4）By step 3）Obtained non-wood plant fibre with capillary pervious function and parts by weight is the porous of 25-35 Material is added in dispersing mixer, is 50 DEG C -60 DEG C in temperature, rotating speed is 540rpm-660rpm dispersion mixings 15min- 30min；Then the hydrosol that parts by weight are 3-5 is sprayed, and using rotating speed as 1000rpm-1200rpm dispersion mixing 3min-5min, The gluey hydrosol is set to be entirely coated on modified non-wood plant fibre and porous material surface；It is again 0.8-1.2's by parts by weight Dispersant, parts by weight are 0.6-1.0 water reducers and parts by weight are that 0.5-1.0 activating agents add, and using rotating speed as 1000rpm- 1200rpm continues dispersion mixing 3-5 min, obtains the dispersed permeable additive of powdered pervious concrete.
Wherein, described non-wood plant fibre is cotton fiber, flax fiber, tossa, hemp, stalk fibre At least one of dimension, sugarcane fibre, its particle diameter is between 100 microns and 200 microns, and draw ratio is between 10:1 and 30:1 it Between.
Wherein described fine porous material is in attapulgite, zeolite, diatomite, expanded perlite, expanded vermiculite At least one, its particle diameter is between 200 mesh and 400 mesh.
Further, the hydrosol is from the polyvinyl alcohol water solution that concentration is 10-20%；The dispersant selects six At least one of sodium metaphosphate, sodium tripolyphosphate, lauryl sodium sulfate, polyacrylamide.
Further, the water reducer selects conventional water reducer such as naphthalene water reducer, lignin water reducer, aliphatic diminishing Agent, melamine water reducer, polycarboxylate water-reducer.
Further, the activating agent selects anion surfactant RCOONa（Carboxylate）、R-OSO3Na（Sulfuric ester Salt）、R-SO3Na（Sulfonate）、R-OPO3Na2（Phosphate ester salt）At least one of.
The present invention proposes that a kind of permeable additive of pervious concrete and preparation method, the concrete string additive are Using non-wood plant fibre to form main body, its raw material sources of non-wood plant fibre are extensive, cheap, renewable, can give birth to Thing is degraded, and has good hydrophily and loose structure；First by the scattered expansion of non-wood plant fibre, then pass through high temperature moment carbon Change handle, consolidate non-wood plant fibre macropore duct, then using acetic anhydride in 1- acrylic -3- methyl ammonia in imidazoles To non-wood plant fibre activation modification, during activation modification, introduced on non-wood plant fibre macropore hole wall abundant Micropore canals, and form network pore passage structure with macropore duct, lift the porosity, permeable amount and parent of non-wood plant fibre It is water-based, and robust structure, make it have capillary pervious function；Then it is mixed with permeable coagulation by adding porous material again The permeable additive of soil, strengthen the compression strength of the permeable additive of pervious concrete, while modified non-timber using porous material While vegetative fiber improves the porosity and permeable amount of the permeable additive of pervious concrete, and can lifting pervious concrete is saturating The toughness of water additive.After the permeable additive of the pervious concrete mixes with concrete, modified non-wood plant fibre Firm entirety is formed with concrete, is uniformly distributed in concrete structure, in inapplicable coarse aggregate or less using coarse aggregate In the case of, the porosity of concrete is not only improved, increases the permeable amount of concrete, and also assures that the strong of concrete Degree, wearability, avoiding common pervious concrete reduces the shortcomings that concrete strength is to strengthen permeable amount.
The permeable additive application of pervious concrete of the present invention is remarkably improved the hole of pervious concrete in pervious concrete Rate and permeable amount, while ensure the intensity of pervious concrete, wearability.Utilize concrete additive of the present invention, 425 ordinary silicons Acid salt cement, 50 mesh fine sands are with mass ratio 3:5:5 make pervious concrete, excellent by detecting its performance, after hardening Inside concrete contain have more than 25% interconnected pore, coefficient of permeability is more than 10mm/s, and compression strength is more than 45MPa, anti-folding Intensity is more than 5.2MPa, available for the top load road concrete such as urban road and highway.
The characteristics of a kind of permeable additive of pervious concrete of the present invention and preparation method protrude is：
1st, the present invention proposes a kind of permeable additive of pervious concrete, fine using the non-wood plant of modified network structure Dimension has capillary pervious function, and firm entirety can be formed with concrete, is improving pervious concrete porosity and permeable While amount, it is ensured that the intensity of concrete, wearability, the top load road such as urban road and highway can be made an addition to mix Solidifying soil.
2nd, a kind of permeable additive of pervious concrete of the present invention, production process is brief, and technique is easily-controllable, easy to use, can be straight Addition is connect to use in existing concrete.
3rd, a kind of permeable additive of pervious concrete of the present invention, have high intensity, high-wearing feature, height permeable for concrete Property, can be widely used for super expressway, urban road, garden path, pavement, parking lot, park etc. has the engineering of permeable requirement And road, it is significant to alleviation city " heat island phenomenon ", mitigation urban waterlogging, recovery urban ecology circulation.
Embodiment
Below by way of embodiment, the present invention is described in further detail, but this should not be interpreted as to the present invention Scope be only limitted to following example.In the case where not departing from above method thought of the present invention, according to ordinary skill The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
A kind of preparation method of the permeable additive of pervious concrete：
1）Hemp and flax fiber that parts by weight are 80 are disperseed in the homogenizer that temperature is 160 DEG C, be swollen Swollen 5min, mixer rotating speed 300rpm；
2）By step 1）Obtained hemp and flax fiber temperature in high-temperature calcination stove is to be carbonized 0.5 at 800 DEG C Second, consolidate hemp and flax fiber macropore duct；
3）By step 2）Obtained hemp and flax fiber is added to acetic anhydride and 1- acrylic -3- methyl ammonia for miaow It is fine in hemp and flax during the lower immersion 1h activation modifications that temperature is 80 DEG C, activation modification in azoles mixed solution Abundant micropore canals are introduced on dimension macropore hole wall, and network pore passage structure is formed with macropore duct, lift non-wood plant The porosity and permeable amount of fiber；Filtering, drying, obtains the hemp and flax fiber with capillary pervious function；
4）By step 3）Obtained hemp with capillary pervious function and flax fiber and parts by weight be 25 it is recessed Convex rod soil and zeolite are added in dispersing mixer, are 50 DEG C in temperature, rotating speed is 540rpm dispersion mixings 15min；Then spray Parts by weight are 3 10% polyvinyl alcohol, and using rotating speed as 1000rpm dispersion mixing 3min, are entirely coated on gluey polyvinyl alcohol Hemp, flax fiber, attapulgite and zeolite surface；The calgon for being again 0.8 by parts by weight, parts by weight 0.6 Polycarboxylate water-reducer and parts by weight are 0.5 R-OPO3Na2（Phosphate ester salt）Activating agent adds, and continues by 1000rpm of rotating speed Dispersion mixing 3min, obtain the dispersed permeable additive of powdered pervious concrete.
Embodiment 2
A kind of preparation method of the permeable additive of pervious concrete：
1）The stalk fibre that parts by weight are 90 is disperseed in the homogenizer that temperature is 200 DEG C, expands 10min, is stirred Mix machine rotating speed 500rpm；
2）By step 1）Obtained stalk plant fiber is carbonized 2.0 seconds at being 1000 DEG C in temperature, makes non-wood plant fine Dimension macropore duct consolidates；
3）By step 2）Obtained stalk fibre is added to acetic anhydride and 1- acrylic -3- methyl ammonia for imidazoles mixed solution In, during the lower immersion 2h activation modifications that temperature is 100 DEG C, activation modification, introduced on stalk fibre macropore hole wall Abundant micropore canals, and network pore passage structure is formed with macropore duct, lift the porosity and permeable amount of stalk fibre；Cross Filter, drying, obtains the stalk fibre with capillary pervious function；
4）By step 3）The obtained stalk fibre with capillary pervious function divides with parts by weight for 35 diatomite addition Dissipate in mixer, be 60 DEG C in temperature, rotating speed is 660rpm dispersion mixings 30min；Then the 20% poly- second that parts by weight are 5 is sprayed Enol, and using rotating speed as 1200rpm dispersion mixing 5min, gluey polyvinyl alcohol is entirely coated on modified straw fiber and diatom Native surface；Again by lauryl sodium sulfate that parts by weight are 1.2, parts by weight are 1.0 melamine water reducers and parts by weight are 1.0 R- SO3Na（Sulfonate）Activating agent adds, and continues the min of dispersion mixing 5 by 1200rpm of rotating speed, obtains dispersed powder The permeable additive of shape pervious concrete.
Embodiment 3
A kind of preparation method of the permeable additive of pervious concrete：
1）Cotton fiber and tossa that parts by weight are 84 are disperseed in the homogenizer that temperature is 180 DEG C, expanded 6min, mixer rotating speed 360rpm；
2）By step 1）Obtained cotton fiber and tossa is carbonized 1.0 seconds at being 900 DEG C in temperature, makes cotton fiber and Huang Flaxen fiber macropore duct consolidates；
3）By step 2）Obtained cotton fiber and tossa is added to acetic anhydride and 1- acrylic -3- methyl ammonia for imidazoles In mixed solution, during the lower immersion 1.5h activation modifications that temperature is 85 DEG C, activation modification, in cotton fiber and tossa Abundant micropore canals are introduced on macropore hole wall, and network pore passage structure is formed with macropore duct, lift cotton fiber and jute The porosity and permeable amount of fiber；Filtering, drying, obtains the cotton fiber and tossa with capillary pervious function；
4）By step 3）Obtained cotton fiber with capillary pervious function and tossa and the expansion that parts by weight are 30 Perlite is added in dispersing mixer, is 56 DEG C in temperature, rotating speed is 600rpm dispersion mixings 20min；Then parts by weight are sprayed For 4 16% polyvinyl alcohol, and using rotating speed as 1100rpm dispersion mixing 4min, gluey polyvinyl alcohol is set to be entirely coated on modification Cotton fiber, tossa and expanded perlite surface；It is again that 0.8 naphthalene system subtracts by polyacrylamide that parts by weight are 1.0, parts by weight Aqua and lignin water reducer and parts by weight are 0.6 RCOONa（Carboxylate）Activating agent adds, and using rotating speed as 1100rpm Continue the min of dispersion mixing 4, obtain the dispersed permeable additive of powdered pervious concrete.
Embodiment 4
A kind of preparation method of the permeable additive of pervious concrete：
1）Sugarcane fibre and flax fiber that parts by weight are 88 are disperseed in the homogenizer that temperature is 160 DEG C, be swollen Swollen 8min, mixer rotating speed 420rpm；
2）By step 1）Obtained sugarcane fibre and flax fiber is carbonized 1.5 seconds at being 800 DEG C in temperature, makes sugarcane fibre Consolidated with flax fiber macropore duct；
3）By step 2）Obtained sugarcane fibre and flax fiber is added to acetic anhydride and 1- acrylic -3- methyl ammonia for miaow In azoles mixed solution, during the lower immersion 1.5h activation modifications that temperature is 85 DEG C, activation modification, in sugarcane fibre and flax Abundant micropore canals are introduced on fiber macropore hole wall, and network pore passage structure is formed with macropore duct, lift sugarcane fibre With the porosity and permeable amount of flax fiber；Filtering, drying, obtain the sugarcane fibre and flax fibre with capillary pervious function Dimension；
4）By step 3）Obtained sugarcane fibre with capillary pervious function and flax fiber and parts by weight be 28 it is swollen Swollen vermiculite is added in dispersing mixer, is 55 DEG C in temperature, rotating speed is 600rpm dispersion mixings 25min；Then parts by weight are sprayed For 5 15% polyvinyl alcohol, and using rotating speed as 1000rpmm dispersion mixing 3min, gluey polyvinyl alcohol is set to be entirely coated on modification Sugarcane fibre, flax fiber and expanded vermiculite surface；Again by parts by weight be 0.8 sodium tripolyphosphate and lauryl sodium sulfate, Parts by weight are 0.7 aliphatic water reducing agent and parts by weight are 0.5 R-OSO3Na（Sulfuric acid）Activating agent add, and using rotating speed as 1000rpm continues the min of dispersion mixing 5, obtains the dispersed permeable additive of powdered pervious concrete.

Claims (5)

  1. A kind of 1. permeable additive of pervious concrete, it is characterised in that：The non-wood plant fibre raw material of the pervious function containing capillary, It is made up of by weight following each component：
    Non-wood plant fibre 80-90 parts,
    Porous material 25-35 parts,
    Hydrosol 3-5 parts,
    Dispersant 0.8-1.2 parts,
    Water reducer 0.6-1.0 parts,
    Activating agent 0.5-1.0 parts；
    Specific make step is as follows：
    1) non-wood plant fibre that parts by weight are 80-90 is disperseed in the homogenizer that temperature is 160-200 DEG C, expanded 5-10min, mixer rotating speed 300-500rpm；
    2) by step 1）Obtained non-wood plant fibre temperature in high-temperature calcination stove is the 0.5- that is carbonized at 800-1000 DEG C 2.0 seconds, consolidate non-wood plant fibre macropore duct；
    3) by step 2）It is molten for imidazoles mixing that obtained non-wood plant fibre is added to acetic anhydride and 1- acrylic -3- methyl ammonia In liquid, during the lower immersion 1-2h activation modifications that temperature is 80-100 DEG C, activation modification, in non-wood plant fibre macropore Abundant micropore canals are introduced on hole wall, and network pore passage structure is formed with macropore duct, lift non-wood plant fibre Porosity and permeable amount；Filtering, drying, obtains the non-wood plant fibre with capillary pervious function；
    4）By step 3）Porous material of the obtained non-wood plant fibre with capillary pervious function with parts by weight for 25-35 Add in dispersing mixer, be 50 DEG C -60 DEG C in temperature, rotating speed is 540rpm-660rpm dispersion mixings 15min-30min；So Parts by weight are sprayed afterwards and are the 3-5 hydrosol, and using rotating speed as 1000rpm-1200rpm dispersion mixing 3min-5min, make gluey water Colloidal sol is entirely coated on modified non-wood plant fibre and porous material surface；Again by dispersant, again that parts by weight are 0.8-1.2 Amount part is 0.6-1.0 water reducers and parts by weight are that 0.5-1.0 activating agents add, and is continued by 1000rpm-1200rpm of rotating speed Dispersion mixing 3-5min, obtain the dispersed permeable additive of powdered pervious concrete.
  2. A kind of 2. permeable additive of pervious concrete according to claim 1, it is characterised in that：Described non-wood plant Fiber is cotton fiber, flax fiber, tossa, hemp, stalk fibre, at least one of sugarcane fibre, its particle diameter Between 100 microns and 200 microns, draw ratio is between 10:1 and 30:Between 1.
  3. A kind of 3. permeable additive of pervious concrete according to claim 1, it is characterised in that：Described porous material is At least one of attapulgite, zeolite, diatomite, expanded perlite, expanded vermiculite, its particle diameter between 200 mesh and 400 mesh it Between.
  4. A kind of 4. permeable additive of pervious concrete according to claim 1, it is characterised in that：The hydrosol is from dense Spend the polyvinyl alcohol water solution for 10-20%；The dispersant is from calgon, sodium tripolyphosphate, dodecyl sulphate At least one of sodium, polyacrylamide；The water reducer selects conventional water reducer；The activating agent is lived from anionic surface Property agent RCOONa, R-OSO3Na、R-SO3Na、R-OPO3Na2At least one of.
  5. A kind of 5. permeable additive of pervious concrete according to claim 1, it is characterised in that：The pervious concrete is saturating Water additive is applied to pervious concrete, is remarkably improved the porosity and permeable amount of pervious concrete, while ensures permeable mixed Coagulate intensity, the wearability of soil.
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