CN104671720A - Road filling material prepared from building waste and coal gangue and preparation method of road filling material - Google Patents
Road filling material prepared from building waste and coal gangue and preparation method of road filling material Download PDFInfo
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- CN104671720A CN104671720A CN201510107754.1A CN201510107754A CN104671720A CN 104671720 A CN104671720 A CN 104671720A CN 201510107754 A CN201510107754 A CN 201510107754A CN 104671720 A CN104671720 A CN 104671720A
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Classifications
-
- 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
- Y02W30/58—Construction or demolition [C&D] waste
-
- 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
Landscapes
- Road Paving Structures (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a road filling material prepared from building waste and coal gangue and a preparation method of the road filling material. The road filling material is prepared from the following raw materials based on total weight of the road filling material: 1-15% of active micro powder, 10-30% of coal gangue, 40-60% of a soil material separated from the building waste, and 0.02-0.06% of an activator. The road filling material disclosed by the invention can meet the road indication requirement, and enables the construction waste to be fully utilized.
Description
Technical field
The present invention relates to road filling using building waste and coal gangue to manufacture 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.
Coal gangue is the black gray expandable waste rock that a kind of carbon content of discharging in construction of coal mine, coal mining and the course of processing is lower, harder than coal, it is one of maximum industrial residue of China's quantity discharged, China's coal gangue product is about the 15%-20% of raw coal output, cause accumulating about 3,000,000,000 tons, form about 1500 coal gangue hills, at present just with the speed increment of annual emissions about 1.5 hundred million tons, annual newly-increased floor space about 100,000 mu, the utilization ratio of China's coal gangue is not high, well below foreign level.A large amount of soil and farmland have been occupied in the stacking of the coal gangue do not utilized, and cause great pollution to surrounding environment.To coal gangue pollution and comprehensive utilization, be more and more subject to people's attention.
At present the character of coal gangue is also lacked and go deep into systematic research, the chemical composition of coal gangue is different with place of production change, chemical property is also variant, and highway is higher with Road construction code requirement, coal gangue does not all have corresponding standard foundation as the fundamental property of continental rise filling material, every Testing index, detection method and construction requirement, current specifications and data can not find out necessary data and way, therefore its application is very restricted, and on highway, especially motorway is used as roadbed material and is not also effectively promoted.Coal gangue also exists empirical and subjectivity in the use of road engineering roadbed filling, lacks scientific research and the theory summary of system.
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 filling increasingly stringent, the application of building waste in road filling is subject to many limitations, and such as building waste utilization ratio is not high, ratio in road filling shared by building waste is less, etc.
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 filling 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 filling, 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 10-30 % 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 filling of building waste complex coal spoil, make the utilization ratio of building waste and coal gangue high, and the performance of this road filling can reach the performance of current road filling used, further, road concrete can be made to have works fine and later strength, and concrete early stage wear resistance can be improved.
Summary of the invention
In order to overcome the above-mentioned problems in the prior art, the present inventor is through further investigation, propose a kind of new solution, make the main raw material of road filling be building waste and coal gangue, and the road filling performance that building waste and coal gangue 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 filling, based on the total weight of this road filling, it comprises the activated micro mist of 1-15 % by weight tool, 10-30 % by weight coal gangue, 40-60 % by weight is separated the earth material obtained from building waste, and the exciting agent of 0.02-0.06 % by weight.
The content of the activated micro mist of described tool is preferably 5-10 % by weight, more preferably 8-10 % by weight.
The content of described coal gangue is preferably 15-30 % by weight, more preferably 20-25 % by weight.
The described content being separated the earth material obtained 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 filling does not preferably comprise cement, pitch or cement concrete.
The activated micro mist of described tool can for the following two kinds micro mist (1) and (2) be with the obtained mixture of the part by weight of 1:5-5:1 mixing: (1) by by the common brick in building waste, blue bricks, watt and/or glass cullet fragmentation, be ground to specific surface area for 750-2200m
2/ kg, preferred 1000-2200m
2/ kg, more preferably 1500-2200m
2the micro mist that/kg obtains; (2) by broken for flyash, to be ground to specific surface area be 800-2600m
2/ kg, preferred 1200-2600m
2/ kg, more preferably 1800-2600m
2the micro mist that/kg obtains.。
Described earth material can be the soil and great soil group impurity separated from building waste.
Described exciting agent can be compound bio exciting agent, can also be bases exciting agent and/or salt exciting agent.
In a preferred embodiment, the particle diameter of described coal gangue is 2-10cm, and Surface coating has volcanic ash.Its preparation method comprises: coal shale in brick making is broken into the blocky-shaped particle that particle diameter is 2-10cm by (1); (2) by described blocky-shaped particle with based on this blocky-shaped particle total weight 0.01-0.05 % by weight, preferably 0.02 % by weight unslaked lime (CaO) and 0.1-1.0 % by weight, preferably the volcanic ash of 0.5 % by weight is mixed to evenly, obtain compound; (3) add based on this compound total weight 0.1-1.5 % by weight, the preferably water of 1.0 % by weight to described compound, be stirred to evenly, then place 1-5 days at ambient conditions.
The definition of described coal gangue particle diameter is identical with the particle diameter implication of the irregular particle thing that this area is understood usually, refers to the maximum particle diameter of blocky-shaped particle.
The present inventor finds, coal gangue, under the effect of empty G&W, can continue physical and chemical reaction occurs, and such as non-oxidation section branch wherein continues to be oxidized, and therefore character is unstable, needs to carry out stabilization treatment.The present inventor finds through further investigation, can completely cut off it and contact with external environment after coal gangue Surface coating one deck volcanic ash, prevents it from physical and chemical reaction occurring, greatly improves stability.In the present invention, by utilizing the reaction of unslaked lime that volcanic ash can be made to be attached to coal gangue surface securely, good encapsulating effect is served.Carry out sealing in the top of bastard coal rock layers and bottom when this prior encapsulating mode and construction to compare, sealing effectiveness is well a lot, almost can completely cut off outside atmosphere completely.Find through test, this coal gangue encapsulating mode of the present invention, and carry out sealing in the top of bastard coal rock layers and bottom during construction and compare, can the life more than 2 times of roadbed of use coal gangue, and there is larger construction handiness.As mentioned before, along with the place of production is different, chemical property there are differences coal gangue, therefore fills to road and brings very large unpredictability, but, by encapsulating mode of the present invention, the uncertainty of the paved roads performance that this nature difference brings can be eliminated.
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 filling 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 by the common brick in building waste, blue bricks, watt and/or glass cullet carry 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 filling completely, and can reach road fills required performance index simultaneously.Infer its reason, may be because concrete and the common brick in building waste in building waste, blue bricks, watt and/or glass cullet compared with, water-absorbent is comparatively large, 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 filling.By contrast, brick powder is used as road filling 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 (1) is only at 750-2200m
2effectively can play the substitution effect of cement in the scope of/kg, make the ultimate compression strength needed for road filling acquisition.When the specific surface area of micro mist is less than 750m
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 2200m
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 filling.Common brick in the present invention, blue bricks, watt and/or the grinding of glass cullet can carry out under grinding medium exists.Described grinding can be carried out under grinding medium exists, described grinding medium be preferably zirconium silicate ball and the blending agent of yttrium stable zirconium oxide ball.
Equally, find that the specific surface area of the activated micro mist of tool (2) is only at 800-2600m
2road concrete can be effectively made to have works fine and later strength and early stage wear resistance in the scope of/kg.
In construction rubbish, common brick, blue bricks and tile account for about 7.0 % by weight of rubbish composition, and in dismounting rubbish, common brick accounts for about 5 % by weight of rubbish composition, in building waste, also there is many unhydrated cement, these are all that the preparation of micro mist of the present invention provides sufficient source.
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 filling of the present invention provides.
In road filling of the present invention, exciting agent can be compound bio exciting agent, also can be bases exciting agent and/or salt exciting agent.
Described compound bio exciting agent can be TerraZyme enzyme, beta-glucosidase enzyme and Phosphoric acid esterase with (10 ~ 15): (1 ~ 2): the mixture of (2 ~ 3) weight ratio.
By the combination of these 3 kinds of enzymes, it can be made to find mutual promoting action.When using the road filling of described compound bio exciting agent to be used as base material, unconfined compression strength can be significantly improved, performance is drawn in bending resistance, resistance to compression and anti-bending rollering modulus, especially unconfined compression strength can be made relative to the described road filling not adding described compound bio exciting agent or use single creature exciting agent (such as TerraZyme enzyme), can improve at least about 17%.Compound bio exciting agent of the present invention can also add 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 filling 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 filling.
In addition, broken by flyash, to be ground to specific surface area be 800-2600m
2the micro mist that/kg obtains by with aforementioned common brick, blue bricks, watt and/or glass cullet are broken, to be ground to specific surface area be 750-2200m
2the micro mist phase grating that/kg obtains, the two can play mutually collaborative promoter action, the micro mist such as obtained by flyash can make by common brick, blue bricks, watt and/or the excitation rate of micro mist that obtains of glass cullet improve nearly one times.
Described exciting agent can be compound bio exciting agent, also can be preferably bases exciting agent and/or salt exciting agent.The present inventor also finds, may be difficult to make road filling reach most desirable by single alkali-activator, the matching of exciting agent and other material is poor, and the stability of road filling 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, 10-30 % by weight Na
2cO
3with 20-30 % by weight Na
2siO
39H
2the mixture of O; Salt exciting agent B is total weight 10-30 % 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 filling 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 filling, 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 road fills 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 filling, 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 filling, the method comprises the following steps: the activated micro mist of 1-15 % by weight tool, 10-30 % by weight coal gangue, 40-60 % by weight are separated from building waste obtain earth material, 0.02-0.06 % by weight exciting agent mix, its order by merging is as follows:
(1) exciting agent of the activated micro mist of 1-15 % by weight tool, 10-30 % by weight coal gangue and 0.02-0.06 % by weight is mixed, be stirred well to evenly;
(2) mixture step (1) obtained and 40-60 % by weight are separated the earth material obtained and mix from building waste, are stirred well to evenly.
Preferably, said method comprising the steps of: by the activated micro mist of 1-15 % by weight tool, 10-30 % by weight coal gangue, 40-60 % by weight is separated the earth material obtained 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) exciting agent of the activated micro mist of 1-15 % by weight tool, 10-30 % by weight coal gangue and 0.02-0.06 % by weight is mixed, be 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 step (2) obtained and 40-60 % by weight are separated the earth material obtained and mix from building waste, are 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, coal gangue is generally comparatively fine and close, can mix in the initial step, and can improve the density of compound with activate micro powder and exciting agent.
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 filling 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 filling.
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 filling from reducing along with the time, be very beneficial for constructing in road fills, 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 filling of preparation 3 tons of weights, based on the total weight of this road filling, it comprises the activated micro mist of about 14 % by weight tool, about 25.95 % by weight coal gangues, about 60 % by weight are separated the earth material obtained from building waste, and the exciting agent of about 0.05 % by weight.Wherein, the activated micro mist of described tool is by jaw crusher and shredder, the common brick in building waste is broken, grinding, and the specific surface area of the micro mist of acquisition is 2000m
2/ kg, by jaw crusher and shredder, flyash is broken, grinding, the specific surface area of the micro mist of acquisition is 2100m
2/ kg, mixes the two with the weight ratio of 1:1; Described earth material is the soil separated from building waste, the earth of mainly engineering construction generation; Described coal gangue is the coal gangue from tafelberg Coal Mine Group; 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 filling preparation process, first exciting agent is fully mixed with micro mist and coal gangue in agitator, then mix with earth material isolated from building waste.According to standard Road Design specification, get a certain amount of described material, make the test specimen of Φ × h=10cm × 10cm, test its 28d unconfined compression strength.Through measuring, the intensity of its 28d, up to 1.84MPa, meets the requirement of strength (0.8MPa) of advanced road roadbed embankment material completely.
Comparative example 1
The specific surface area preparing the road filling 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 common brick is broken, grind the weight such as the micro mist use that obtains is about 500m
2the micro mist that the building refuse concrete of/kg is broken, grinding obtains substitutes.According to standard Road Design specification, get a certain amount of described material, make the test specimen of Φ × h=10cm × 10cm, test its 28d unconfined compression strength according to the method identical with embodiment 1.Through measuring, the intensity of its 28d is 0.80MPa, meets the requirement of strength of advanced road roadbed embankment material reluctantly.
Comparative example 2
Prepare the road filling 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 common brick specific surface area that is broken, that grind the micro mist obtained is 500m
2/ kg, the specific surface area of the micro mist that flyash is broken, grinding obtains is 600m
2/ kg.According to standard Road Design specification, get a certain amount of described material, make the test specimen of Φ × h=10cm × 10cm, test its 28d unconfined compression strength according to the method identical with embodiment 1.Through measuring, the intensity of its 28d is 0.76MPa, does not meet the requirement of strength of advanced road roadbed embankment material.
Comparative example 3
Prepare the road filling 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, get a certain amount of described material, make the test specimen of Φ × h=10cm × 10cm, test its 28d unconfined compression strength according to the method identical with embodiment 1.Through measuring, the intensity of its 28d is 0.82MPa, meets the requirement of strength of advanced road roadbed embankment material reluctantly.
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 filling 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 filling gross weight being incorporated as embodiment 1 on the basis of the road filling of embodiment 1 is obtained and enhancing.According to standard Road Design specification, get a certain amount of described material, make the test specimen of Φ × h=10cm × 10cm, test its 28d unconfined compression strength according to the method identical with embodiment 1.Through measuring, the intensity of its 28d is 2.21MPa, and unconfined compression strength intensity improves 20%, meets the requirement of strength of advanced road roadbed embankment material completely, and meets the unconfined compression strength requirement of motorway.
Embodiment 4: the preparation of admixture
The chemical structural formula of monomer (I) 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 filling 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 filling gross weight on the basis of the road filling 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 filling 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 filling gross weight on the basis of the road filling 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 reduces by 17%, this is reflected in the very large road filling of consumption, the consumption of water can be reduced, greatly improve the intensity of road filling, by the enhancing of described water-reducing property, high-strength road filling can be obtained, avoid the use of cement.Meanwhile, the life-span that the excellent properties of described water reducer can extend road filling can reach more than one times, thus greatly extends the work-ing life of road.
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 (5)
1. a road filling, based on the total weight of this road filling, it comprises the activated micro mist of 1-15 % by weight tool, 10-30 % by weight coal gangue, 40-60 % by weight is separated the earth material obtained from building waste, and the exciting agent of 0.02-0.06 % by weight.
2. road filling according to claim 1, wherein this road filling does not comprise cement, pitch or cement concrete.
3. road filling according to claim 1 and 2, the activated micro mist of wherein said tool is that the following two kinds micro mist (1) and (2) are obtained with the mixing of the part by weight of 1:5-5:1: (1) by by the common brick in building waste, blue bricks, watt and/or glass cullet broken, be ground to specific surface area for 750-2200m
2the micro mist that/kg obtains; (2) by broken for flyash, to be ground to specific surface area be 800-2600m
2the micro mist that/kg obtains.
4. the road filling according to any one of claim 1-3, wherein said exciting agent is compound bio exciting agent.
5. the preparation method of the road filling according to any one of claim 1-4, the method comprises the following steps: the activated micro mist of 1-15 % by weight tool, 10-30 % by weight coal gangue, 40-60 % by weight are separated from building waste obtain earth material, 0.02-0.06 % by weight exciting agent mix, its order by merging is as follows:
(1) exciting agent of the activated micro mist of 1-15 % by weight tool, 10-30 % by weight coal gangue and 0.02-0.06 % by weight is mixed, be stirred well to evenly;
(2) mixture step (1) obtained and 40-60 % by weight are separated the earth material obtained and mix from building waste, are stirred well to evenly.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481314A (en) * | 2015-12-01 | 2016-04-13 | 安徽理工大学 | Coal mine paste-like filling material using construction waste, and preparation and filling method thereof |
| CN109809746A (en) * | 2019-03-18 | 2019-05-28 | 徐州工程学院 | A method for preparing grouting filling material using industrial solid waste |
| CN113636822A (en) * | 2021-07-19 | 2021-11-12 | 中铁第一勘察设计院集团有限公司 | Improved construction waste roadbed filler using sintered brick micro powder as modifier and method |
| CN115180912A (en) * | 2022-07-15 | 2022-10-14 | 山东海林环保设备工程有限公司 | Method for preparing filling material based on coal-based solid waste |
| CN117776658A (en) * | 2024-01-02 | 2024-03-29 | 中铁河北投资开发建设有限公司 | Alkali-activated solid waste-based backfill material and preparation method thereof |
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| CN104355574A (en) * | 2014-10-17 | 2015-02-18 | 韩先福 | Road paving material manufactured by construction wastes and fly ash and manufacturing method thereof |
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| CN104773977A (en) * | 2014-10-17 | 2015-07-15 | 韩先福 | Road paving material prepared by compounding residue soil with cola gangue powder and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012027534A1 (en) * | 2010-08-25 | 2012-03-01 | Supergrout Products, Llc | Grout for filling a micro-trench |
| 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 |
| CN104086131A (en) * | 2014-07-25 | 2014-10-08 | 衣大明 | Road paving material prepared by compounding building rubbish and limestone flour and preparation method of road paving material |
| CN104355574A (en) * | 2014-10-17 | 2015-02-18 | 韩先福 | Road paving material manufactured by construction wastes and fly ash and manufacturing method thereof |
| CN104773977A (en) * | 2014-10-17 | 2015-07-15 | 韩先福 | Road paving material prepared by compounding residue soil with cola gangue powder and preparation method thereof |
| 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 (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481314A (en) * | 2015-12-01 | 2016-04-13 | 安徽理工大学 | Coal mine paste-like filling material using construction waste, and preparation and filling method thereof |
| CN109809746A (en) * | 2019-03-18 | 2019-05-28 | 徐州工程学院 | A method for preparing grouting filling material using industrial solid waste |
| CN109809746B (en) * | 2019-03-18 | 2021-03-19 | 徐州工程学院 | Method for preparing grouting filling material by using industrial solid waste |
| CN113636822A (en) * | 2021-07-19 | 2021-11-12 | 中铁第一勘察设计院集团有限公司 | Improved construction waste roadbed filler using sintered brick micro powder as modifier and method |
| CN115180912A (en) * | 2022-07-15 | 2022-10-14 | 山东海林环保设备工程有限公司 | Method for preparing filling material based on coal-based solid waste |
| CN117776658A (en) * | 2024-01-02 | 2024-03-29 | 中铁河北投资开发建设有限公司 | Alkali-activated solid waste-based backfill material and preparation method thereof |
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