CN104692770A - Road paving material prepared from construction waste composite steel slag and preparation method of road paving material - Google Patents
Road paving material prepared from construction waste composite steel slag and preparation method of road paving material Download PDFInfo
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- CN104692770A CN104692770A CN201510107653.4A CN201510107653A CN104692770A CN 104692770 A CN104692770 A CN 104692770A CN 201510107653 A CN201510107653 A CN 201510107653A CN 104692770 A CN104692770 A CN 104692770A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a road paving material prepared from construction waste composite steel slag and a preparation method of the road paving material. Based on the total weight of the road paving material, the road paving material contains the following ingredients in percentage by weight: 5-15% of micropowder with activity, 20-40% of steel slag, 40-60% of soil material and 0.02-0.06% of activator, wherein the micropowder with activity is prepared from phosphorus residue, and the soil material is separated from construction waste. According to the road paving material disclosed by the invention, the construction waste is fully utilized while road indicator requirements are met.
Description
Technical field
The present invention relates to road pavements of a kind of building waste compound slag and preparation method thereof.
Background technology
Building waste mainly refers to that construction, unit in charge of construction or individual build, repair, remove and carry out all kinds of waste such as earth, waste residue, mortar produced in house decoraton process to all kinds of structures, buildings etc.The essentially consist of the building waste that dissimilar building structure produces is consistent, main component comprises earth, the mortar be scattered, waste residue, bituminous concrete fragment, piling block remaining Steel Concrete pile crown, cement concrete, pick cutter produce masonry, the wrapping material of various scrap metal, timber, all kinds of building material product, wall insulated board, the waste material that fitment process produces and other waste.
Slag is in steelmaking process, by the impurity of the oxide compound of the oxidized rear generation of element each in metal charge, the furnace lining be etched and fettling material, metal furnaces material strip people as silt particle and the slag making materials that specially adds, as Wingdale, rhombspar, fluorite, iron ore, silica etc. the refuse that formed, wherein slag making materials is the main source of slag.According to the difference of process for making technology and equipment, the production rate of slag is different, is generally about 15% ~ 20% of crude steel output.
Slag is abandoned as refuse, not only takies a large amount of land resources, also pollution is caused to environment.In order to adapt to the fast development of Iron And Steel Industry, in recent years, how Ge Chan steel state all will utilize the problem of slag to refer in important schedule, and has achieved some achievements.Up to the present, slag comprehensive utilization relates generally to following field: return metallurgy use again, make cement, make road construction work material, makes agriculture fertilizer and acid soil improving agent, for wastewater treatment etc., less for the research in urban road laying.
On the other hand, building waste is compared with other municipal wastes, there is the features such as low toxicity, harmless, resourcebility utilization, along with the fast development of urban construction, natural materials will be day by day exhausted, if building waste is carried out effective regeneration utilization by certain technology, not only can solve this contradiction, the harm of rubbish to environment can also be eliminated, realize economic Sustainable development.China is more late to the research of building waste recycle, though achieve certain achievement in research at present, but still lacks comparatively systematic research, lacks standard and the code of perfect regeneration techniques.In China, building different kinds of roads needs a large amount of materials, if can be used in road engineering by building waste, then will produce great economic worth.
Simultaneously, the factors such as the diversity of building waste and the standard-required of road pavements increasingly stringent, the application of building waste in road pavements is subject to many limitations, and such as building waste utilization ratio is not high, ratio in road pavements shared by building waste is less, etc.
CN101343852A discloses a kind of method utilizing waste steel slag to fill highway subgrade, the steps include: that (1) adopts waste steel slag filling roadbed; (2) the filling roadbed fill core concrete of slag need be controlled, ensure the stability of roadbed; (3) slag railway embankment should adopt vibroll layered rolling, when rolling, slag should be within the scope of optimum moisture content, adopt the method for test section test to determine suitable to roll facility, adopt maximum dry density and optimum moisture content to calculate standard as the compactness that slag is filling roadbed; (4) cross-sectional design of steel slag filled-up road embankment, comprises depth of fill, side slope of embankment ratio of slope, fills thickness, closedtop layer, underseal layer, interlayer, bank protection and water exhaust system.The inventive method is easy, easy to operate, decreases stacking place and the environmental pollution of slag; turn waste into wealth, facilitate environment protection, solve the not enough problem of highway engineering filler; cost is low, and the quality of its roadbed filled out can meet the construction requirement of High-Grade Highway Subgrade.
CN1133269A opens a kind of gelling material for road engineering and other civil engineering and production method, its product is mainly used in requiring wear-resisting, corrosion resistant engineering and other engineering that anti-drying shrinkage requirement is higher, hydration heat is lower, it is characterized in that this product (cement) is by slag and slag, flyash, the portland cement clinker after clearing up in advance and processing also magnetic separation, mixes containing aluminium sulfate and silicate minerals many kinds of substance grinding.
CN101239804A discloses a kind of method adopting building waste to manufacture building materials, it sorts successively to urban architecture material, magnetic separation, primary fragmentation and gravitational segregation, building waste is separated into heavy material, light material and mineral materials, and by described mineral materials after secondary breaking for the manufacture of material of construction, the raw material of described material of construction comprises: fibre material 5-10 part, mineral materials 40-60 part, low-water cement 20-30 part and unclassified stores 0-30 part, the production process of described material of construction is by fibre material, mineral materials and unclassified stores mix, add low-water cement again to mix, add water stirring pulping, insert vibratory compaction or extrusion forming in mould, building slab section product is formed after natural curing.In this patent documentation, with only the mineral materials in building waste, building waste overall utilization is low, obtain the complex steps of mineral materials, and it is not high in the ratio of material of construction Minerals material, time even more important, this building waste is for the preparation of plate product, instead of requires higher road pavements for the preparation of to intensity, water tolerance.
CN101348343A discloses a kind of building materials utilizing building waste to produce and preparation method thereof, the technical problem solved be make material configuration simple, reduce costs, it is by the following technical solutions: a kind of building materials utilizing building waste to produce, the weight ratio number comprised is: building waste 85-97 part, unslaked lime 3-15 part, described building waste comprises masonry and concrete, effective CaO content >=85% in described unslaked lime.The method comprises the following steps: (1) carries out primary election to building waste; (2) building waste starting material being crushed to granularity for being greater than 0 to 4mm, being milled to by the unslaked lime of CaO content >=85% and being less than 100 orders by comminuted starting materials; (3) starting material coordinate, and the building waste pulverized and unslaked lime fine powder are transported to slaking silos by weight building waste 85-97 part, unslaked lime 3-15 part after being mixed evenly, stop 1-3 hour; (4) shaping, enter stirrer from slaking silos material out, after adding the 5-8% water mix of total dry powder consumption, be delivered to feed bin, brick pressing machine is pressed into the section bar of different shape, the pressure of use is 200-1500 ton, 1-3 second clamping time; (5) autoclave curing is 190-230 DEG C in temperature, and pressure is maintenance 6-10 hour under the condition of 7-10kg, is building materials finished product.In this patent documentation, be mainly used for manufacturing shaping building material product, can not be used as road pavements, such as intensity is nowhere near.
WO2006033561A1 discloses a kind of method of building waste sorting.In the process, the building castoff being ground into predetermined size is joined in the liquid of settling bath, and in groove, be isolated into various component according to proportion, wherein, described liquid has the reference specific gravity low but higher than the proportion of remaining ingredient than the proportion reclaiming component, thus only makes the component that will reclaim be separated by being deposited to the bottom of described settling bath.According to described method, can easily other impurity be included in building castoff be separated with the aggregate reused of high-quality.Particularly, suitable adjustment is carried out to the reference specific gravity of separating liquid, thus even can easily the various impurity (tile, common brick, bituminous concrete, cement lumps etc.) heavier than water be separated with the aggregate that can reuse.The sorting of what the document was mainly paid close attention to is building waste.
JP2006257681A discloses a kind of method utilizing building waste to manufacture mineral material, the method effectively can reduce the volatilization of the volatile organic compounds that building waste produces when pyroprocessing, it is by burning shell and pulverizing the volatile organic compounds that produces when the porousness shell particle that produces and described material adsorb building waste pyroprocessing, thus makes the more green and safety of the recycling of building waste.The method cost compare is high.
KR100938212B1 discloses a kind of composition for building the road, and said composition comprises 20-40 % by weight resin, 22-27 % by weight environmental protection is gathered materials, 22-27 % by weight recirculation chip material, 13-18 weight percent filler, 1.5-5 weight pigment and and 1.5-3 % by weight common additives.Said composition cost contains a large amount of resin, and cost compare is high and not ageing-resistant, in addition owing to lacking cement component, and at least intensity wretched insufficiency.
Non-patent literature " experimental study that construction refuse regenerated micro mist utilizes ", Ma Chuntao etc., Ningxia engineering, 8th volume the 1st phase, in March, 2009 discloses the method for manufacture and use thereof of construction refuse regenerated micro mist, wherein the raw material of regenerative micro powder is in the processes such as regenerative bone material by concrete fragmentation, screening, inevitably produces the fine powder material accounting for regeneration aggregate quality about 10%, particle diameter <0.16mm, and the high specific surface-area that grinding obtains micro mist is only 735.4m
2/ kg.
Need a kind of road pavements of building waste compound slag, make the utilization ratio of building waste and slag high and the performance of this road pavements can reach the performance of current road pavements used.
Summary of the invention
In order to overcome the above-mentioned problems in the prior art, the present inventor is through further investigation, propose new solution, make the main raw material of road pavements be building waste and slag, and the road pavements performance that building waste and slag can be made to obtain fully utilizing, preparing completely can be up to standard.The invention provides following technical scheme:
On the one hand, provide a kind of road pavements, based on the total weight of this road pavements, it comprises the activated micro mist of tool that 5-15 % by weight is obtained by phosphorus slag, 20-40 % by weight slag, 40-60 % by weight is separated obtained earth material from building waste, and the exciting agent of 0.02-0.06 % by weight.
The content of the activated micro mist of the described tool obtained by phosphorus slag is preferably 8-15 % by weight, is more preferably 10-12 % by weight.
The content of described slag is preferably 20-30 % by weight, more preferably 20-25 % by weight.
The described content being separated obtained earth material from building waste is preferably 40-55 % by weight, more preferably 40-50 % by weight.
The content of described exciting agent is preferably 0.02-0.06 % by weight, more preferably 0.03-0.05 % by weight.
Described road pavements does not preferably comprise cement, pitch or cement concrete.
The activated micro mist of described tool can obtain by being pulverized by phosphorus slag, grinding.Described phosphorus slag can be when producing yellow phosphorus by electric furnace process, and what obtain take Calucium Silicate powder as the melts of main component, through the phosphorus slag that quenching obtains.
The specific surface area of the activated micro mist of described tool can be 650-2000m
2/ kg, preferred 1000-2000m
2/ kg, more preferably 1500-1800m
2/ kg.
Described earth material can be the soil and great soil group impurity separated from building waste.
In road pavements of the present invention, exciting agent can be compound bio solidifying agent, can be also bases exciting agent and/or salt exciting agent, or be their combination.
Described slag is preferably past the slag of process, and wherein contained more than 80% of calcium constituent exists with larnite form with more than 60% of element silicon, and described slag is processed by following steps:
(1) slag is ground, until specific surface area is greater than 1500m
2/ kg; With
(2) by the temperature lower calcination 6-36 of the slag after grinding at 500-1000 DEG C, preferred 12-24 hour, is then cooled to room temperature under field conditions (factors).
Further preferably, the slag after the calcining that described step (2) is obtained siliceous salt and/or containing the aqueous solution of aluminium salt in soak more than 5 days, preferably more than 10 days, described siliceous salt or can be (NH containing the solution of aluminium salt
4)
2siO
3or NH
4[Al (OH)
4] the aqueous solution of 20-50 % by weight.The present inventor finds, wherein NH
4 +existence can strengthen the absorption of slag to Si and Al, thus further strengthen the activity index of slag.
In addition, in the present invention, by grinding, unbodied slag can be made to change major part in crystal form, and crystalline phase is larnite and ferriferous oxide mainly, thus can significantly improve its hydration activity index, usually can improve more than 10%.Levigating steel slag can also reduce the instability of free CaO and MgO.
The slag of preferred high silicon and high aluminium content in the present invention, is more conducive to the carrying out of above-mentioned reaction and the stable of slag and densification.Slag after process can also be carried out very effective alkali-activated carbonatite by alkali contained in exciting agent of the present invention.
Existing be that in the regenerative micro powder preparation of raw material, its raw material adopted is all that waste concrete prepares the thin particulate matter produced in aggregate substantially, and the micro mist of preparation is difficult to obtain larger specific surface area with building waste.More it is pointed out that existing be in the regenerative micro powder preparation of raw material with building waste, in order to make the building that obtains or road pavements meet the demands, only substituting part of cement in concrete material with regenerative micro powder, and cement can not be substituted completely.
The beat all discovery of the present inventor, by phosphorus slag is carried out fragmentation, grinding, the micro mist that the performance of high surface area is very excellent can be obtained, it has exceeded cement at some aspect of performance after being excited by exciting agent of the present invention, make it possible to substitute cement usually used in road pavements completely, and the performance index required by urban road laying can be reached simultaneously.Inferring its reason, may be because the concrete in building waste is compared with phosphorus slag, and water-absorbent comparatively greatly, intensity is lower, fragility is comparatively large, and these features cause the micro mist prepared by regenerated waste concrete to be difficult to the cement substituted completely in road pavements.By contrast, phosphorus slag powder is used as road pavements when reacting, the SiO in chemical constitution
2and Al
2o
3component such as calcium hydroxide reaction in isoreactivity component and exciting agent, generates the products such as hydrated calcium silicate, drated calcium aluminate or hydrated calcium aluminate sulfate, thus forms cement strength.
The present inventor also finds, the specific surface area of the activated micro mist of tool is only at 650-2000m
2effectively can play the substitution effect of cement in the scope of/kg, make the ultimate compression strength needed for road pavements acquisition.When the specific surface area of micro mist is less than 650m
2during/kg, then the lateral reactivity of this micro mist is inadequate, such as, make the ultimate compression strength of road, resistance to cleavage not enough.And when specific surface area is greater than 2000m
2during/kg, then performance improves no longer significantly and preparation cost increase.By contrast, when using discarded concrete to carry out the grinding of micro mist, because its water-absorbent is large, be easy to cause humidity, and due to complicated component, comprise the sand grains that certain proportion is difficult to grind, even if be also difficult to obtain 500m by grinding
2the specific surface area of/more than kg, the features such as described water-absorbent is large in addition, intensity is low, cause the cement that only can substitute finite part in road pavements.In the present invention, the grinding of phosphorus slag can be carried out under grinding medium exists, described grinding medium be preferably zirconium silicate ball and yttrium stable zirconium oxide ball with the blending agent of 4:1 ~ 6:1 (weight ratio).
Be when producing yellow phosphorus by electric furnace process, what obtain take Calucium Silicate powder as the melts of main component, through quenching, is granulation electric furnace phosphoric slag, is called for short phosphorus slag, and these be all the source that the preparation of micro mist of the present invention provides abundance.
About building waste component, remove the component of rubbish from old building, concrete proportion, up to more than 50%, is secondly earth (about 10%), stone and rubble (about 10%) etc.; From the component of New Buildings construction rubbish, secondly earth ratio about more than 30% is stone and rubble (about 25%), concrete (about 20%) etc.These are sufficient source for earth material in road pavements of the present invention provides.
In road pavements of the present invention, exciting agent can be compound bio solidifying agent, also can be bases exciting agent and/or salt exciting agent, such as, or can be their combination, the weight ratio of compound bio solidifying agent and bases exciting agent and/or salt exciting agent can be (1 ~ 2): (3 ~ 5).
Described compound bio solidifying agent is preferably hard native enzyme, beta-glucosidase enzyme and Phosphoric acid esterase with (10 ~ 15): (1 ~ 2): the mixture of (2 ~ 3) weight ratio.
By the particular combination of described 3 kinds of enzymes, can make to play mutual promoting action between them, the use of such as Phosphoric acid esterase can strengthen the water stability of hard native enzyme.In the present invention, when using the road pavements of described compound bio solidifying agent to be used as base material, the advantageous particularly stability having earthen materia, make it possible to significantly improve unconfined compression strength, performance is drawn in bending resistance, resistance to compression and anti-bending rollering modulus, especially unconfined compression strength can be made relative to the road pavements not adding described compound bio solidifying agent or use single creature exciting agent (such as hard native enzyme), as when as subbase course material, can improve at least about 17%, this synergy is that those skilled in the art are unforeseeable according to existing knowledge institute.Compound bio solidifying agent of the present invention can also increase the stability of paver, extends the life-span of road, and in long-term existence basic unit, can keep solidification effect for a long time.
In road pavements of the present invention, about described bases exciting agent and/or salt exciting agent, be preferably the combination of bases exciting agent and salt exciting agent, i.e. compound activator.Alkali-activated carbonatite mainly increases the OH of slurry
-concentration. improve liquid phase basicity, make the pH value of liquid phase keep about about 12, this is conducive to formation and the C of ettringite
3s, C
2the raising of S hydration rate, thus the activity exciting micro mist in road pavements.
The present inventor also finds, may be difficult to make road pavements reach most desirable by single alkali-activator, the matching of exciting agent and other material is poor, and the stability of road pavements is undesirable.The present inventor, through large quantity research and test, seeks the optimum matching relation of compound activator and described micro mist and earth class raw material, and final discovery also preferably adds a certain amount of salt exciting agent usually.
Described compound activator is the composition of bases exciting agent A and salt exciting agent B, and the weight ratio of exciting agent A and B is 2:1-6:1; Bases exciting agent A is total weight 20-30 % by weight Ca (OH) based on bases exciting agent A
2, 10-20 % by weight NaOH, 20-40 % by weight Na
2cO
3with 20-30 % by weight Na
2siO
39H
2the mixture of O; Salt exciting agent B is total weight 20-40 % by weight Na based on salt exciting agent B
2sO
4, 20-30 % by weight CaSO
42H
2o, 10-20 % by weight CaCl
2with 20-30 % by weight Ca
2sO
4mixture.
This road pavements can also comprise the modification of 1-5 % by weight from building waste and the lumber fibre material of enhancing, and the lumber fibre material of wherein said modification and enhancing obtains by the following method:
(1) be cut into short for the culled wood in building waste the segment materials that maximum diameter is 0.5-2cm;
(2) short segment materials of cutting is placed in stirred pot, add the aqueous solution of surface-modifying agent, stir evenly, the mass ratio of segment materials and surface-modifying agent is 200:1-500:1, described surface-modifying agent is polyvinylpolypyrrolidone, and in solution, the concentration of polyvinylpolypyrrolidone is 20-30 % by weight;
(3) in the segment materials after surface modification, polyethylene powders, polypropylene powder or its mixture is added, mix, make the surface attachment polyethylene powders of segment materials, polypropylene powder or its mixture, the mass ratio of described segment materials and polyethylene, polypropylene or its mixture is 10:1-100:1;
(4) compound step (3) obtained is at 110 DEG C-220 DEG C, and preferably 120 DEG C-180 DEG C, more preferably thermal treatment 30-60 minute under the condition of 130-170 DEG C, obtains the lumber fibre material of modification and enhancing after being cooled to room temperature.
Described timber segment materials and polyethylene powders, the appropriate mass ratio of polypropylene powder or its mixture, make after heat treatment, the polyethylene of hot melt and/or polypropylene just can the surfaces of complete coated timber fragment substantially, if described amount of polymeric material is less, then can not cover the surface of timber fragment completely, make timber segment materials be easy to degraded in as roadbed material use procedure such as to rot, if and described amount of polymeric material is excessive, not then effective in cost, and make the performance of timber itself such as toughness and some strength be difficult to bring into play.
As mentioned before, in current building waste is recycled, waste and old wood in building waste is not utilized effectively, such as, comprise the wood type building waste of significant proportion in decoration garbage, all be not fully used, incinerated often, not only effectively do not utilize it to be worth, also cause Heavy environmental pollution.For this problem, the present inventor finds through research, by carrying out modification and enhancing to timber according to the method described above, and can particularly advantageously used as in the steady layer of water, basic unit etc. of road.Generally understanding is in the past that timber is easy to rotten, particularly in the environment having water to also exist, is difficult to be used in road pavements, is more difficult to be used in the steady layer of water.In the present invention, by carrying out modification and enhancement process to it, making it have enough water tolerance, even if it is used in the steady layer of water, basic unit etc. in urban road laying simultaneously, also can not cause due to the effect of light material modified aging.
Described polyethylene, polypropylene or its mixture are preferably from the plastic waste in rubbish.Preferably polyethylene, more preferably linear low density polyethylene (LLDPE).Known in the art, plastic waste (as various waste plastic bottle) mainly linear low density polyethylene (LLDPE) in rubbish such as building waste, it has, and intensity is high, good toughness, rigidity are strong, heat-resisting, cold-resistant, good chemical stability, also there is the performances such as good resisting environmental stress and cracking, tear-resistant intensity, and can acid-and base-resisting, organic solvent etc.The present inventor finds through further investigation, and material property required in these performances described and roadbed material is very identical, and therefore preferably use strengthens lumber fibre material from the polyethylene of the plastic waste in rubbish.The lumber fibre material obtained by the inventive method not only further enhancing the toughness of lumber fibre itself, additionally provides high strength, high rigidity, high heat-resisting, high cold-resistant, desired properties that high chemical stability is such.The plastic waste of the polyethylene material in building waste is ground into powder namely can be used in described method.
What form sharp contrast therewith is, all the time, even if recycle culled wood, also normally rotproofing is carried out to timber, but this needs to use sanitas, sanitas is the salt such as chromic salt, borate, cupric arsenate normally, if be used in road pavements, very serious environmental pollution can be caused, such as soil pollution.
In addition, in lumber fibre modifying process of the present invention, for surface physics and the chemical structure of timber, polyvinylpolypyrrolidone is filtered out as Interfacial compatibilization agent in the Interfacial compatibilization agent used from other field a large amount of, polyvinylpolypyrrolidone has the side base of polarity and hydrophobic main chain, can contact with polyethylene (or polypropylene) with timber respectively, play the compatibilization reducing interfacial tension, the use of this polymer bulking agents, avoid expanding material migration in use, be conducive to having given play to stable compatibilization effect, be conducive to the stability guaranteeing matrix material simultaneously.Polyvinylpolypyrrolidone is mixed with solution, and preferred aqueous solution uses, and method is easy, not with an organic solvent, and then also has the good feature of environmental protection.
The invention still further relates to the preparation method of above-mentioned road pavements, the method comprises the activated micro mist of the tool obtained by phosphorus slag by 5-15 % by weight, 20-40 % by weight slag, 40-60 % by weight is separated obtained earth material from building waste, mix with the exciting agent of 0.02-0.06 % by weight, be stirred well to evenly.
Preferably, said method comprising the steps of:
The activated micro mist of tool that 5-15 % by weight is obtained by phosphorus slag, 20-40 % by weight slag, 40-60 % by weight is separated obtained earth material from building waste, with the exciting agent of 0.02-0.06 % by weight, and optionally 1-5 % by weight mixes from the admixture of the modification of building waste and the lumber fibre material of enhancing and optional 0.01-2 % by weight, its order by merging is as follows:
(1) the exciting agent mixing of the activated micro mist of tool, 20-40 % by weight slag and the 0.02-0.06 % by weight that are obtained by phosphorus slag by 5-15 % by weight, is stirred well to evenly;
(2) mixture optionally step (1) obtained mixes from the admixture of the modification of building waste and the lumber fibre material of enhancing and 0.01-2 % by weight with optional 1-5 % by weight; With
(3) mixture that step (2) obtains is separated obtained earth material with 40-60 % by weight from building waste to mix, is stirred well to evenly.
The present inventor finds, feed in raw material while common with prior art and to compare with the method mixed, exciting agent more can excite the activity of micro mist, its reason is mainly, if low-down for ratio exciting agent is mixed with the very large earth material of ratio in initial mixing step, then easily wrapped up by earth material, thus make it be difficult to contact with micropowder material; In addition, the general granularity of slag is comparatively thin and fine and close, can mix with activate micro powder and exciting agent in the initial step.
In a preferred embodiment, the timber sorted out in building waste separation step process can as the raw material of the lumber fibre material of modification and enhancing, and the method being prepared the lumber fibre material of modification and enhancing by described timber comprises the following steps:
(1) be cut into short for the culled wood in building waste the segment materials that maximum diameter is 0.5-2cm;
(2) short segment materials of cutting is placed in stirred pot, add the aqueous solution of surface-modifying agent, stir evenly, the mass ratio of segment materials and surface-modifying agent is 200:1-500:1, described surface-modifying agent is polyvinylpolypyrrolidone, and in solution, the concentration of polyvinylpolypyrrolidone is 20-30 % by weight;
(3) in the segment materials after surface modification, polyethylene powders, polypropylene powder or its mixture is added, mix, make the surface attachment polyethylene powders of segment materials, polypropylene powder or its mixture, the mass ratio of described segment materials and polyethylene, polypropylene or its mixture is 10:1-100:1;
(4) compound step (3) obtained is at 110 DEG C-220 DEG C, and preferably 120 DEG C-180 DEG C, more preferably thermal treatment 30-60 minute under the condition of 130-170 DEG C, obtains the lumber fibre material of modification and enhancing after being cooled to room temperature.
Certainly, if those skilled in the art are it is to be appreciated that the amount of polyethylene powders that timber in building waste, plastic waste obtain can not meet the demand of batching, also optionally can obtain from other refuse process field.
In a further preferred embodiment, in road pavements of the present invention, 0.01-5 % by weight can also be comprised, the concrete admixture of preferred 0.05-2 % by weight.
Concrete admixture of the present invention preferably comprises or multipolymer by making following monomer (I) and monomer (II) copolymerization obtain:
(I)
Wherein R
1such as, for the alkyl of C1-C6, ethyl, R
2such as, for the alkoxyl group of C2-C6, oxyethyl group, n is the integer of 2-10; With
(II) α, beta-unsaturated carboxylic acid or its salt;
Wherein the weight ratio of monomer (I) and (II) is 50-95:5-50, and the weight-average molecular weight of described multipolymer is 500-2000.
In described structure, the existence repeating ethoxy unit further enhancing the concrete water-reducing property of making.
Most preferably, described α, beta-unsaturated carboxylic acid has following chemical structural formula:
Finding by replacing at phenyl ring contraposition F, the water-reducing property of multipolymer can be strengthened further, thus the described admixture being low to moderate 0.01 % by weight can be added just can realize required water-reducing property in road pavements.
Of the present invention this there is excellent water-reducing property admixture polymkeric substance or its analogue not yet have report.
Polymerization process can adopt the polymerization process of this area routine to carry out, such as mass polymerization, solution polymerization, emulsion polymerization or suspension polymerization.
The present inventor finds through research, by adding such admixture, can provide excellent water-reducing property, prevent the mobility of road pavements from reducing along with the time, be very beneficial for constructing in urban road laying, and make it possible to the use effectively avoiding cement, road intensity is high.
Embodiment
By following specific embodiment and comparative example, further describe the present invention, but embodiment only for illustration of, can not limit the scope of the invention.
In the present invention, properties test can be carried out with reference to following standard: 1, GB/T 1346 " cement normal consistency water consumption, time of coagulation, the stability method of inspection "; 2, GB/T 17671-1999 " Test method for strength of hydraulic cement mortar "; 3, cement water reducing agent quality standard and test method JGJ 56-84; 4, GB 8076-2008; 5, JTGE51-2009 highway stabilized with inorganic binder testing of materials code; With 6, the Ministry of Communications's " highway road surface construction technique normalizing " of issuing.
Embodiment 1
The road pavements of preparation 3 tons of weights, based on the total weight of this road pavements, it comprises the about 14 % by weight activated micro mists of tool obtained by phosphorus slag, about 25.95 % by weight slags, about 60 % by weight are separated obtained earth material from building waste, and the exciting agent of about 0.05 % by weight.Wherein, the activated micro mist of described tool is obtained by jaw crusher and shredder, phosphorus slag is broken, grinding; The specific surface area of the micro mist obtained is 1700m
2/ kg, described earth material is the soil separated from building waste, the earth of mainly engineering construction generation; Described slag is the steelmaking slag from Shoudu Iron and Steel Co; Exciting agent is the composition of bases exciting agent A and salt exciting agent B, and the weight ratio of exciting agent A and B is 5:1; Bases exciting agent A is the total weight 30 % by weight Ca (OH) based on bases exciting agent A
2, 10 % by weight NaOH, 30 % by weight Na
2cO
3with 30 % by weight Na
2siO
39H
2the mixture of O; Salt exciting agent B is total weight 30 % by weight Na based on salt exciting agent B
2sO
4, 25 % by weight CaSO
42H
2o, 15 % by weight CaCl
2with 30 % by weight Ca
2sO
4mixture.In described road pavements preparation process, first exciting agent is fully mixed with micro mist in agitator, then mix with earth material.According to standard Road Design specification, described material is carried out making as road base layer, test its 7d ultimate compression strength.Through measuring, its 7d ultimate compression strength is 3.80MPa, and meeting the 7d ultimate compression strength of motorway to basic unit is completely the requirement of 3 ~ 4Mpa.
Comparative example 1
Prepare the road pavements of 3 tons of weights according to the schedule of operation identical with embodiment 1, the difference of itself and embodiment 1 is only that the specific surface area of the weight such as described micro mist use is about 500m
2the micro mist that the building refuse concrete of/kg is broken, grinding obtains substitutes.According to standard Road Design specification, described material is carried out making as road base layer, test its 7d ultimate compression strength.According to the measuring method identical with embodiment 1, recording 7d ultimate compression strength is 1.90MPa, and not meeting the 7d ultimate compression strength of motorway to basic unit is the requirement of 3 ~ 4Mpa, does not also meet the requirement of Class I highway to traffic base material.
Comparative example 2
Prepare the road pavements of 3 tons of weights according to the schedule of operation identical with embodiment 1, the difference of itself and embodiment 1 is only that the specific surface area of micro mist is 450m
2/ kg.According to standard Road Design specification, described material is carried out making as road base layer, test its 7d ultimate compression strength.According to the measuring method identical with embodiment 1, recording 7d ultimate compression strength is 2.55MPa, and not meeting the 7d ultimate compression strength of motorway to basic unit is the requirement of 3 ~ 4Mpa, but meets common road such as Class I highway to the requirement of traffic base material.
Comparative example 3
Prepare the road pavements of 3 tons of weights according to the schedule of operation identical with embodiment 1, the difference of itself and embodiment 1 is only not use salt exciting agent B, and the bases exciting agent A of the weight such as its use substitutes.According to standard Road Design specification, described material is carried out making as road base layer, test its 7d ultimate compression strength.According to the measuring method identical with embodiment 1, recording 7d ultimate compression strength is 3.00MPa, and only meeting the 7d ultimate compression strength of motorway to basic unit is reluctantly the requirement of 3 ~ 4Mpa.
Embodiment 2
The preparation of the lumber fibre material of modification and enhancing
(1) by short for the culled wood in building waste be cut into maximum diameter be 0.5-2cm not wait segment materials;
(2) be placed in stirred pot by short segment materials of cutting, add the polyvinylpolypyrrolidone aqueous solution of 25 % by weight, stir with agitator, the mass ratio of segment materials and surface-modifying agent is 300:1;
(3) in the segment materials after surface modification, add polyethylene powders, fully mix, make it even, make the surface attachment polyethylene powders of segment materials, described segment materials and poly mass ratio are 80:1;
(4) compound step (3) obtained thermal treatment 45 minutes under the condition of 135 DEG C, obtains the lumber fibre material of modification and enhancing after being cooled to room temperature.
Embodiment 3
Prepare the road pavements of 3 tons of weights according to the schedule of operation identical with embodiment 1, the difference of itself and embodiment 1 is only the lumber fibre material of the modification that the embodiment 2 of 3 % by weight of the road pavements gross weight being incorporated as embodiment 1 on the basis of the road pavements of embodiment 1 is obtained and enhancing.According to standard Road Design specification, described material is carried out making as road base layer, test its 7d ultimate compression strength.According to the measuring method identical with embodiment 1, recording 7d ultimate compression strength is 3.95MPa, and meeting the 7d ultimate compression strength of motorway to basic unit is the requirement of 3 ~ 4Mpa, and the road pavements of strength ratio embodiment 1 improves about 4%.
Embodiment 4: the preparation of admixture
The chemical structural formula of monomer (I) body is:
Wherein R
1for ethyl, R
2oxyethyl group, n is 5, this monomer can by by polyoxyethylene glycol and ethylacrylic acid conveniently esterification process carry out esterification, then by esterification products and oxyethyl group chlorine conveniently eliminative reaction obtain, or can be directly purchased from Sigma-Aldrich company;
The chemical structural formula of monomer (II) is:
this monomer is commercially available from Solution on Chemical Reagents in Shanghai company;
Adopt emulsion polymerization, to 500mL with adding 80g monomer (I) and 10g monomer (II) and 200mL deionized water in the round-bottomed flask of mechanical stirring device, stir lower logical nitrogen, then 0.1g ammonium persulphate is added as initiator, be warming up to polymerization temperature, polymerization temperature is 80 DEG C, keeps reaction 4 hours, reclaiming polymerisate after terminating reaction, is about 1500 through measuring the weight-average molecular weight of gained multipolymer.
Embodiment 5:
Prepare the road pavements R ' of 3 tons of weights according to the schedule of operation identical with embodiment 1, the difference of itself and embodiment 1 is only to be incorporated as the obtained admixture of the embodiment 4 of 0.2 % by weight of this road pavements gross weight on the basis of the road pavements of embodiment 1.According to standard Road Design specification, described material is carried out making as road base layer, test water reducing ability and water reducer shrinkage ratio.
Comparative example 4:
The road pavements R of 3 tons of weights is prepared according to the schedule of operation identical with embodiment 1 ", the difference of itself and embodiment 1 is only to be incorporated as the commercially available TH-928 polycarboxylate high performance water-reducing agent of 0.3 % by weight of this road pavements gross weight on the basis of the road pavements of embodiment 1.TH-928 polycarboxylate high performance water-reducing agent be at present think the water reducer of better performances.According to standard Road Design specification, described material is carried out making as road base layer, test water reducing ability and water reducer shrinkage ratio.
Table 1: the performance comparison of different admixture
Compared with conventional water reducer, water reducer of the present invention makes water reducing ability improve 7%, and yield rate reduces by 16%, this is reflected in the very large road pavements of consumption, the consumption of water can be reduced, greatly improve the intensity of road pavements, by the enhancing of described water-reducing property, high-strength road pavements can be obtained, avoid the use of cement.Meanwhile, the life-span that the excellent properties of described water reducer can extend road pavements can reach more than one times, thus greatly extends the work-ing life of road.
Embodiment 6
Prepare the road pavements of 3 tons of weights according to the schedule of operation identical with embodiment 1, the difference of itself and embodiment 1 is only that slag has carried out activation treatment as follows: be about 1800m by slag in grinding machine for grinding to specific surface area
2/ kg, then by the temperature lower calcination 12 hour of the slag after grinding at 600 DEG C, is then cooled to room temperature under field conditions (factors).According to standard Road Design specification, described material is carried out making as road base layer, test its 7d ultimate compression strength.According to the measuring method identical with embodiment 1, recording 7d ultimate compression strength is 4.20MPa, and meeting the 7d ultimate compression strength of motorway to basic unit is completely the requirement of 3 ~ 4Mpa, even higher than its standard.This 7d ultimate compression strength than road pavements in embodiment 1 improves about 10% more than.
Finally it should be noted that obviously above-described embodiment is only for example of the present invention is clearly described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of amplifying out or variation be still among protection scope of the present invention.
Claims (6)
1. a road pavements, based on the total weight of this road pavements, it comprises the activated micro mist of tool that 5-15 % by weight is obtained by phosphorus slag, 20-40 % by weight slag, 40-60 % by weight is separated obtained earth material from building waste, and the exciting agent of 0.02-0.06 % by weight.
2. road pavements according to claim 1, wherein this road pavements does not comprise cement, pitch or cement concrete.
3. road pavements according to claim 1 and 2, the activated micro mist of wherein said tool obtains by being pulverized by phosphorus slag, grinding.
4. road pavements according to claim 3, the specific surface area of the activated micro mist of wherein said tool is 650-2000m
2/ kg.
5. the road pavements according to any one of claim 1-4, wherein said exciting agent is compound bio solidifying agent.
6. the preparation method of the road pavements according to any one of claim 1-5, the method comprises the activated micro mist of the tool obtained by phosphorus slag by 5-15 % by weight, 20-40 % by weight slag, 40-60 % by weight is separated obtained earth material from building waste, mix with the exciting agent of 0.02-0.06 % by weight, be stirred well to evenly.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108147706A (en) * | 2018-02-08 | 2018-06-12 | 韶关学院 | A kind of cement base porous pavement material specific complex admixture and its application |
| CN110090850A (en) * | 2019-05-08 | 2019-08-06 | 西部矿业股份有限公司 | It is a kind of using humic acid as the cement solidification arsenic scum method of additive |
| CN111187039A (en) * | 2020-01-08 | 2020-05-22 | 安徽工业大学 | Novel steel slag miscellaneous fill road base material and preparation method thereof |
| CN115466073A (en) * | 2022-08-15 | 2022-12-13 | 电子科技大学 | Steel slag material doped with ammonium salt-graphene composite exciting agent and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104119043A (en) * | 2014-07-24 | 2014-10-29 | 新奥生态建材有限公司 | Road paving material taking building waste as main material and preparation method of road paving material |
| CN104193392A (en) * | 2014-03-19 | 2014-12-10 | 广西科学院 | Method for preparing high-strength light building material by using manganese ore slag |
| CN104402370A (en) * | 2014-12-08 | 2015-03-11 | 北京元泰达环保建材科技有限责任公司 | Road filling material prepared from slag soil and electric furnace slag and preparation method of road filling material |
| CN104402369A (en) * | 2014-12-08 | 2015-03-11 | 北京元泰达环保建材科技有限责任公司 | Road filling material compositely manufactured by muck and coal ash and preparation method thereof |
-
2015
- 2015-03-12 CN CN201510107653.4A patent/CN104692770A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104193392A (en) * | 2014-03-19 | 2014-12-10 | 广西科学院 | Method for preparing high-strength light building material by using manganese ore slag |
| CN104119043A (en) * | 2014-07-24 | 2014-10-29 | 新奥生态建材有限公司 | Road paving material taking building waste as main material and preparation method of road paving material |
| CN104402370A (en) * | 2014-12-08 | 2015-03-11 | 北京元泰达环保建材科技有限责任公司 | Road filling material prepared from slag soil and electric furnace slag and preparation method of road filling material |
| CN104402369A (en) * | 2014-12-08 | 2015-03-11 | 北京元泰达环保建材科技有限责任公司 | Road filling material compositely manufactured by muck and coal ash and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108147706A (en) * | 2018-02-08 | 2018-06-12 | 韶关学院 | A kind of cement base porous pavement material specific complex admixture and its application |
| CN110090850A (en) * | 2019-05-08 | 2019-08-06 | 西部矿业股份有限公司 | It is a kind of using humic acid as the cement solidification arsenic scum method of additive |
| CN111187039A (en) * | 2020-01-08 | 2020-05-22 | 安徽工业大学 | Novel steel slag miscellaneous fill road base material and preparation method thereof |
| CN115466073A (en) * | 2022-08-15 | 2022-12-13 | 电子科技大学 | Steel slag material doped with ammonium salt-graphene composite exciting agent and preparation method thereof |
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