CN101096835B - Lignocellulose material for road and method for making same - Google Patents
Lignocellulose material for road and method for making same Download PDFInfo
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- CN101096835B CN101096835B CN2007100229769A CN200710022976A CN101096835B CN 101096835 B CN101096835 B CN 101096835B CN 2007100229769 A CN2007100229769 A CN 2007100229769A CN 200710022976 A CN200710022976 A CN 200710022976A CN 101096835 B CN101096835 B CN 101096835B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/66—Disintegrating fibre-containing textile articles to obtain fibres for re-use
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Abstract
The present invention discloses lignocellulose material for road, which chooses unstripped waste newspaper as raw material and is prepared by dry process and wet process with mixed filling, surfactant, waterproof agent and retention aid in proportion, wherein the lignocellulose is provided with antistatic property with a 20.5*10(9) of Omega surface resistivit by adding antistat by means of dry and wet process, and 3 to 5m<2>/g of specific surface area by tomentose paperboard. The preparation method comprises the following steps: proceeding high concentration fluff; screening; deslagging; purifying slurry; stirring with mixed filling evenly; pasting; forming paper web; squeezing; drying with drying cylinder and infrared; proceeding flicking course; adding into caoline (talcum powder), active calcium carbonate filler and NaCl with dry process; and getting the wood fiber product. The lignocellulose material provided by the present invention can be homodisperse in asphalt and perfect material for stone mastic asphalt pavement, namely fibre stabilizer of expressway pavement.
Description
One, technical field
The invention belongs to road engineering field of new, specifically relate to be applied to asphalt-mastic-broken stone road surface (stone matrix asphalt, SMA) fiber stabilizer material of express highway pavement and preparation method thereof.
Two, background technology
The SMA road surface is as one of most popular in the world high-grade highway structure, because the constructional feature of himself, fiber stabilizer plays crucial effects in the SMA road surface.The fiber stabilizer that present China is used for the SMA road surface almost all is a lignocellulose.Lignocellulose on the SMA road surface with functioning as follows: a) reinforced action; B) dissemination; C) absorption and absorption asphalt grouting; D) viscosifying action; E) stablize shock absorption.Because the novelty of SMA technology, research and production technology to lignocellulose also are different both at home and abroad, in the applicable cases analysis of lignocellulose both at home and abroad at present, in different countries and regions, all there is the unsuccessful example of use on the SMA road surface, wherein some is exactly because lignocellulose product is of low quality relevant, and this continuation that has limited the SMA road surface is to a certain extent promoted.According to applicable cases and relevant discover of SMA in countries in the world, the problem during lignocellulose product uses at present mainly is: a) moisture-sensitive conglomeration causes product failure; B) oil absorbency deficiency is prone to high temperature bellding phenomenon when summer; C) poor with the pitch affinity, in pitch, be difficult for disperseing, thereby cause the part flushing asphalt, part is dry and astringent; D) fiber easily conglomeration in pitch; E) poor high temperature stability is being closed in the transportation engineering with the pitch mix, and fibre strength takes place by serious the variation, influences its result of use.F) send in the mix process at wind, the fiber after overstocking is difficult for disperseing fully; G) acid-proof alkaline is poor, with the pitch contact process in strength degradation obvious.Because lignocellulose product is a kind of novel product, each manufacturer's technology all holds in close confidence, we are in conjunction with the service condition feedback of lignocellulose in the SMA road surface, the lignocellulose standard of the U.S. reaches the performance analysis to domestic and international product, we have had detailed understanding to the performance and the production technology of domestic and international lignocellulose product, and the fundamental principle that obtains that present stage improves and produce the high performance lignocellulosic material is:
(1) select proper raw material: raw material should have suitable fiber length distribution, and (macrofiber is the most childlike in 6mm, the screening of qi of chong channel ascending adversely sieve is 70% by the proportion of fibers of 100 mesh sieves), to guarantee product not crosslinked winding in dispersion process, can be evenly distributed on the inner and formation reticulated structure of pitch;
(2) select appropriate filler: filler should have big specific surface area, and (the BET surface-area is greater than 12m
2/ g is good) and higher hardness (Mohs' hardness is greater than 3), give lignocellulose good scratch-resistant performance evenly to be covered in fiber surface; Have big specific surface area simultaneously and can adsorb more pitch, to improve the oil absorptiveness of lignocellulose;
(3) thermostability: can bear the temperature more than 260 ℃ and obvious change does not take place for fibre strength and shape so that asphalt high-temperature stir and transportation in the cracking charing does not take place, to keep its strength property.
(4) electrical properties: (surface resistivity is less than 35 * 10 should to have lower surface resistivity
9Ω), the wind of being convenient to fiber under the high temperature drying situation send that fiber does not attract to be difficult to disperse because of surface electrostatic in the dispersion process;
(5) resistance to acids and bases: fiber should have certain acid-proof alkaline, can be in the solution of pH=2 or pH=13 floating more than 7 days and any sedimentation do not take place, with guarantee with acid pitch medium and the long contact process of other alkaline matters in acidity or alkaline bleach liquor degradation take place and influence its strength property in it;
(6) hydrophobic lipophilic interfacial property: lignocellulose should have identical or close interface performance with pitch, so that lignocellulose easier mixing when contacting with pitch improved it in the pitch dispersiveness; And have hydrophobic performance, reduce the suction of exsiccant lignocellulose make moist conglomeration and failure phenomenon;
(7) oil absorptiveness: lignocellulose should have suitable specific surface area (BET specific surface area 3-5m
2/ g) make it have good oil absorptiveness (oil number is greater than 5 times of own wt), prevent local pitch bellding and the dry phenomenon of local pitch to guarantee to adsorb unnecessary pitch.
Three, summary of the invention
1, goal of the invention
The objective of the invention is to prepare the ligno-cellulosic materials on a kind of SMA of can be used for road surface, this material is that the employing crushed news is a raw material, adopts wet papermaking and dry method of paper-making technology to combine and is prepared from.Preparation fiber maximum length is less than 6mm, and the screening of qi of chong channel ascending adversely sieve is 70% by the proportion of fibers of 100 mesh sieves, has oil number greater than own wt 5g/g, and surface resistivity is less than 35 * 10
9Ω, mass dryness fraction is greater than 95%, ash oontent is 13-23%, 210 ℃ down dry 2h weightlessness less than 6%, and can be in pitch homodisperse lignocellulose product.
2, technical scheme
1) material choice
The present invention adopts not that the deinking crushed news is a raw material, and this raw material length-to-diameter ratio is 56, and mean fibre length is 1.05mm, and longest fiber is 4.85mm, and the qi of chong channel ascending adversely sieve is 72% by 100 order proportion of fibers, and ash oontent is 7.12%, and alcohol benzene extractive is 3.21%.Ash content in the raw material and alcohol benzene extractive are fully used in the process of preparation lignocellulose.
2) preparation method
The preparation method of the ligno-cellulosic materials of a kind of application and SMA express highway pavement is characterized in that ligno-cellulosic materials of the present invention is by giving the fiber desired properties in conjunction with wet method and dry method of paper-making technology.
Its preparation process is as follows:
A, the crushed news raw material is discongested into single fiber through hydrapulpter;
B, the fiber after discongesting are 0.2-5% through dilution back successively concentration, through pressurized screen and centrifugal cleaner, remove the fibrous bundle and the sandstone impurity that contain in the slurry;
Slurry after C, the screening slagging-off enters joins stock tank, adds mixed fillers, adds cats product then, stirs;
D, the slurry in the stock tank is entered header box by fan pump, add water-resisting agent and retention aid and filtering aid system;
E, slurry enter the head box online, and through overmolding, squeezing obtains dried paper board after the drying;
F, the cardboard that obtains is utilized fine hair device fine hairization, fine hair process apoplexy is sent and is added kaolin or talcum powder (5% oven dry stock) and active heavy or light calcium carbonate (0.5% oven dry stock), utilizes condensers collection cotton;
G, the examination and test of products, packing, warehouse-in.
Mixed fillers described in the above-mentioned steps C is that grinding or precipitated chalk consumption are 20% oven dry stock, and active heavy or light calcium carbonate consumption are 0.5% oven dry stock, and kaolin or amount of talc are 5% oven dry stock.
Described cats product is 0.1% cetyl chloride ammonium, the hexadecyl brometo de amonio.
Described in the above-mentioned steps D water-resisting agent be that 0.15% oven dry stock or dispersion rosin size consumption are 2% oven dry stock for the alkyl ketene dimer consumption, described retention aid and filtering aid system is cation polypropylene acid amide (400ppm)-boron-moisten soil (0.25% oven dry stock) or oxyethane (600ppm)-modified phenolic resins (1.0%);
Add kaolin and treated carbonates in the fine hair process of above-mentioned steps F, make lignocellulose homodisperse in pitch.
Technical process is described as follows:
The technological process of production of this product wood fibre.
The filler cats product
↓?↓
Waste paper fibre → hydrapulpter discongest → join slurry → pressurized screen screening → centrifugal cleaner slagging-off → dash slurry online → header box → open headbox → multivat machine fiber hydrophobic add fill out → squeeze → cylinder dried → infrared drying → coil paper → dry method discongests fine hairization → condensers collection cotton → packing and puts in storage.
↑ ↑
Dry method adds fills out NaCl
3. useful result
(1), the present invention selects not that the deinking crushed news is a raw material for use, in the preparing product process, do not remove printing ink and resinous principle in the raw material, reduced production cost about 5%.
(2), adopt dry method and wet method to add to fill out technology and combine, utilize dissimilar, granularity, shape, the filler of performance has been given required dispersing property of product and oil absorbency.
(3), adopt alkyl ketene dimer or dispersion rosin size applying glue, improved the hydrophobic performance of fiber surface, and its interface performance had the hydrophilic oleophylic that becomes, help improving the dispersion in pitch.
(4), adopt the linear pressure of 540KN/m, improved the press part dehydration rate, reduced drying load.
(5), adopt the technology that connects infrared drying behind the cylinder dried, with the fiber super-dry, its mass dryness fraction can reach more than 97%.And fiber surface hydrophobization in the infrared drying process, inner resinous principle has also given fiber hydrophobic oleophylic performance, has reduced the possibility of the easy conglomeration of making moist.
(6), for dried paper board, adopt the fine hair metallization processes, the surface-area of fiber is brought up to 3-5m
2/ g brings up to 9-11g/g with the oil absorbency of product.
(7), adopt to do, wet method adds static inhibitor, and the surface resistivity of product is reduced to 20.5 * 10
9Ω.Effectively reduced the surface electrostatic accumulation of fiber, helped sending fiber dispersion in the process at wind.
Four, embodiment
Embodiment 1 lignocellulose material for road and preparation method thereof, (is example with the actual production pilot scale), lignocellulose material for road is by crushed news, (wherein the grinding calcium carbonate consumption is 20% oven dry stock to mixed fillers, active water-ground limestone consumption is 0.5% oven dry stock, and the kaolin consumption is 4.5% oven dry stock), tensio-active agent (cetyl chloride ammonium consumption is 0.1% oven dry stock), water-resisting agent (the alkyl ketene dimer consumption is 0.15% oven dry stock), retention aid (poly amic acid-bentonite consumption is 0.25% oven dry stock) is 100: 25: 0.1 with the weight proportion that oven dry stock calculates: 0.15: 0.25; Its preparation process is as follows:
1) waste paper is discongested dispersion: add 250kg waste paper in 5 cubical hydrapulpters, discongested 4-6 minute, it is discongested dispersion fully;
2) screening of slurry slagging-off: the fiber process dilution back concentration after discongesting is that 1% priority is screened through pressurized screen, through three sections centrifugal cleaners slagging-off of one-level, removes the fibrous bundle and the sandstone impurity that contain in the slurry subsequently;
3) joining slurry feeds in raw material: the slurry after the screening slagging-off enters 80 cubes and joins stock tank, (wherein the grinding calcium carbonate consumption is 20% oven dry stock to add mixed fillers then, active water-ground limestone consumption is 0.5% oven dry stock, the kaolin consumption is 4.5% oven dry stock), add 0.1% cats product (cetyl chloride ammonium) at last, stir;
4) add glue: the slurry in the stock tank is entered header box by fan pump, add alkyl ketene dimer (consumption is 0.15% oven dry stock) sizing material and retention aid and filtering aid system (cation polypropylene acid amide (400ppm)-wilkinite (0.25% oven dry stock);
5) dash the slurry online: slurry is surfed the Net moulding on the many cylinder mould machines of 1600 multi-cylinders with the dense head box that enters of 1.5% slurry;
6) squeezing: the l Water Paper plate that obtains removes moisture through three sections 520KN/m linear pressure unipress;
7) drying: cardboard after the squeezing reaches about 80% mass dryness fraction through bake drying, enters the infrared drying device subsequently, and violent drying is gone out remainder water, and makes the cardboard super-dry, and mass dryness fraction reaches more than 97%;
8) fine hairization: the cardboard that obtains is utilized fine hair device fine hairization, and fine hair process apoplexy is sent and is added kaolin (5% oven dry stock) and active water-ground limestone (0.5% oven dry stock), utilizes condensers collection cotton;
9) examination and test of products, packing, warehouse-in.
Embodiment 2 is an example with the actual production pilot scale, (wherein the grinding calcium carbonate consumption is 20% oven dry stock to lignocellulose material for road by crushed news, mixed fillers, active water-ground limestone consumption is 0.5% oven dry stock, and the kaolin consumption is 4.5% oven dry stock), tensio-active agent (hexadecyl brometo de amonio consumption is 0.1% oven dry stock), water-resisting agent (the dispersion rosin size consumption is 2% oven dry stock), retention aid (oxyethane-modified phenolic resins consumption is 1% oven dry stock) be 100: 25: 0.1 with the weight proportion that oven dry stock calculates: 2: 1; Its preparation process is as follows:
1) waste paper is discongested dispersion: add 250kg waste paper in 5 cubical hydrapulpters, discongested 4-6 minute, it is discongested dispersion fully;
2) screening of slurry slagging-off: the fiber process dilution back concentration after discongesting is that 1% priority is screened through pressurized screen, through three sections centrifugal cleaners slagging-off of one-level, removes the fibrous bundle and the sandstone impurity that contain in the slurry subsequently;
3) joining slurry feeds in raw material: the slurry after the screening slagging-off enters 80 cubes and joins stock tank, (wherein the precipitated chalk consumption is 20% oven dry stock to add mixed fillers then, the calcene consumption is 0.5% oven dry stock, amount of talc is 4.5% oven dry stock), add 0.1% cats product (hexadecyl brometo de amonio) at last, stir;
4) add glue: the slurry in the stock tank is entered header box by fan pump, add dispersion rosin size (consumption is 2% oven dry stock) sizing material and retention aid and filtering aid system (oxyethane (600ppm)-modified phenolic resins (1.0%) retention aid and filtering aid system);
5) dash the slurry online: slurry is surfed the Net moulding on the many cylinder mould machines of 1600 multi-cylinders with the dense head box that enters of 1.5% slurry;
6) squeezing: the l Water Paper plate that obtains removes moisture through three sections 520KN/m linear pressure unipress;
7) drying: cardboard after the squeezing reaches about 80% mass dryness fraction through bake drying, enters the infrared drying device subsequently, and violent drying is gone out remainder water, and makes the cardboard super-dry, and mass dryness fraction reaches more than 97%;
8) fine hairization: the cardboard that obtains is utilized fine hair device fine hairization, and fine hair process apoplexy is sent and is added talcum powder (5% oven dry stock) and calcene (0.5% oven dry stock), utilizes condensers collection cotton;
9) examination and test of products, packing, warehouse-in.
The product performance that obtain by this process are as follows:
Table 1 self-control lignocellulose is analyzed with external certain product performance
| Self-control | Abroad | |
| ＞30 order 30-50 order fiber 50-100 order 100-200 mesh sieve branches＜200 order the ash content of coal % mass dryness fraction % pH value oil absorbencies ratio of own wt (oil number with) hydrophobicity | 32.56% 19.14% 14.08% 6.58% 27.64% 20.80% 94.23% 8.01 9.2＞6day and any sedimentation does not take place | 30.80% 19.69% 12.00% 8.76% 28.75% 17.78 93.91% 8.22 9.60 45 minutes |
| At different levels＞30 orders divide grey 30-50 order branch to contain 50-100 order amount 100-200 order | 5.17％ 5.92％ 7.26％ 14.02％ | 5.25％ 6.06％ 7.63％ 14.19％ |
Table 2 self-control lignocellulose is analyzed with the pitch affinity with external certain product
| Self-control | Abroad | |
| Compound state back side oil stain section situation dispersiveness | The dry and astringent less arbitrary section in surface is all visible, and obviously fiber is good | The dry and astringent few arbitrary section in surface is all visible, and obviously fiber is good |
Claims (9)
1. lignocellulose material for road, it is characterized in that it be by crushed news, mixed fillers, tensio-active agent, water-resisting agent and retention aid with 100: 25: (0.1-1): (0.15-2): weight proportion (0.25-1.0), its weight is pressed oven dry stock and is calculated, and makes by wet method and dry method of paper-making process; Its preparation process is as follows:
A, the crushed news raw material is discongested into single fiber through hydrapulpter;
B, the fiber after discongesting are 0.2-5% through dilution back concentration, successively pass through pressurized screen and centrifugal cleaner, remove the fibrous bundle and the sandstone impurity that contain in the slurry;
Slurry after C, the screening slagging-off enters joins stock tank, adds mixed fillers, adds tensio-active agent then, stirs;
D, the slurry in the stock tank is entered header box by fan pump, add water-resisting agent and retention aid;
E, slurry enter the head box online, and through overmolding, squeezing obtains dried paper board after the drying;
F, the cardboard that obtains is utilized fine hair device fine hairization, fine hair process apoplexy is sent and is added kaolin or talcum powder, and consumption is 5.0% oven dry stock and active heavy or light calcium carbonate, and consumption is 0.5% oven dry stock, utilizes condensers collection cotton;
G, the examination and test of products, packing, warehouse-in.
2. lignocellulose material for road according to claim 1 is characterized in that described mixed fillers is one or more mixing compositions in grinding calcium carbonate, precipitated chalk, active heavy or light calcium carbonate, kaolin or the talcum powder.
3. lignocellulose material for road according to claim 1 is characterized in that described water-resisting agent is alkyl ketene dimer or dispersion rosin size.
4. lignocellulose material for road according to claim 1 is characterized in that described retention aid is cation polypropylene acid amide-wilkinite or oxyethane-modified phenolic resins.
5. lignocellulose material for road according to claim 1 is characterized in that described tensio-active agent is the cetyl chloride ammonium, the hexadecyl brometo de amonio.
6. according to the described ligno-cellulosic materials of claim 1, after steps A, not needing it is characterized in that fiber is carried out the deinking processing and directly enters step B, made full use of the ink composition in the waste paper, it is become effective filler be used.
7. according to the described ligno-cellulosic materials of claim 1, it is characterized in that reaching 1-2% at the online slurry concentration described in the step e, the mass dryness fraction of dry back cardboard＞95%.
8. according to the described ligno-cellulosic materials of claim 1, it is characterized in that in step F, realizing the separation of single fiber, make lignocellulose reach 3-5m with the fine hair device
2The specific surface area of/g.
9. ligno-cellulosic materials as claimed in claim 1 is the application in the motorway face on the asphalt-mastic-broken stone road surface.
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| CN101607800B (en) * | 2009-07-24 | 2012-05-23 | 江苏省交通科学研究院股份有限公司 | Cellulose fiber for road use and method for preparing same |
| CN103755190B (en) * | 2014-01-06 | 2015-10-28 | 同济大学 | A kind of regenerated cellulose fibre and manufacture method thereof |
| CN104098285B (en) * | 2014-07-16 | 2017-01-18 | 同济大学 | Waste paper fiber for self-curing of cement-based material, and preparation method of waste paper fiber |
| CN109208360B (en) * | 2018-09-14 | 2020-06-23 | 中南林业科技大学 | Wood composite fiber and preparation method thereof |
| CN109400965A (en) * | 2018-10-30 | 2019-03-01 | 河南工业大学 | A kind of preparation method of lignocellulose for road modified thermoplastic starch |
| CN111379185A (en) * | 2018-12-28 | 2020-07-07 | 黑龙江惠美佳制药有限公司 | Lignocellulose material for road building and preparation method thereof |
| CN111233374B (en) * | 2020-01-20 | 2020-12-29 | 河北安恕朗晴环保设备有限公司 | Asphalt mastic macadam mixture using recycled fan blade waste as filler |
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