CN104278611A - Road pavement material prepared by compounding residue soil and limestone powder and method for preparing road pavement material - Google Patents
Road pavement material prepared by compounding residue soil and limestone powder and method for preparing road pavement material Download PDFInfo
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- CN104278611A CN104278611A CN201410354574.9A CN201410354574A CN104278611A CN 104278611 A CN104278611 A CN 104278611A CN 201410354574 A CN201410354574 A CN 201410354574A CN 104278611 A CN104278611 A CN 104278611A
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- dregs
- road pavements
- exciting agent
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 239000000463 material Substances 0.000 title abstract description 99
- 239000000843 powder Substances 0.000 title abstract description 30
- 239000002689 soil Substances 0.000 title abstract description 15
- 235000019738 Limestone Nutrition 0.000 title abstract description 13
- 239000006028 limestone Substances 0.000 title abstract description 13
- 238000013329 compounding Methods 0.000 title abstract 2
- 239000002699 waste material Substances 0.000 claims abstract description 65
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 48
- 239000000919 ceramic Substances 0.000 claims abstract description 18
- 239000003595 mist Substances 0.000 claims description 32
- 239000000203 mixture Substances 0.000 claims description 28
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 25
- 239000004568 cement Substances 0.000 claims description 25
- 150000001875 compounds Chemical class 0.000 claims description 25
- 239000004567 concrete Substances 0.000 claims description 20
- 238000002360 preparation method Methods 0.000 claims description 14
- 238000000227 grinding Methods 0.000 claims description 11
- 239000011295 pitch Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 31
- -1 agstone compound Chemical class 0.000 description 30
- 230000004048 modification Effects 0.000 description 19
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- 239000000835 fiber Substances 0.000 description 17
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- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 16
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- 239000011575 calcium Substances 0.000 description 8
- 229960000913 crospovidone Drugs 0.000 description 8
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- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
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- 229910052791 calcium Inorganic materials 0.000 description 4
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
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- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 3
- 229910018516 Al—O Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
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- 239000004067 bulking agent Substances 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
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- WROUWQQRXUBECT-UHFFFAOYSA-N 2-ethylacrylic acid Chemical compound CCC(=C)C(O)=O WROUWQQRXUBECT-UHFFFAOYSA-N 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 229910014472 Ca—O Inorganic materials 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
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- 229910014576 C—Si—H Inorganic materials 0.000 description 1
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- 125000003545 alkoxy group Chemical group 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
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- 210000000988 bone and bone Anatomy 0.000 description 1
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- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- GJYLKIZKRHDRER-UHFFFAOYSA-N calcium;sulfuric acid Chemical compound [Ca].OS(O)(=O)=O GJYLKIZKRHDRER-UHFFFAOYSA-N 0.000 description 1
- 239000010430 carbonatite Substances 0.000 description 1
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- 229910052801 chlorine Inorganic materials 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
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- 229940030341 copper arsenate Drugs 0.000 description 1
- RKYSWCFUYJGIQA-UHFFFAOYSA-H copper(ii) arsenate Chemical compound [Cu+2].[Cu+2].[Cu+2].[O-][As]([O-])([O-])=O.[O-][As]([O-])([O-])=O RKYSWCFUYJGIQA-UHFFFAOYSA-H 0.000 description 1
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- 239000008367 deionised water Substances 0.000 description 1
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- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
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- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/36—Coherent pavings made in situ by subjecting soil to stabilisation
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a road pavement material prepared by compounding residue soil and limestone powder and a method for preparing the road pavement material. Based on the total weight of the road pavement material, the road pavement material comprises 1wt%-10wt% of micro-powder having activity and made of waste ceramic, 40wt%-70wt% of the residue soil, 15wt%-30wt% of the limestone powder and 0.02wt%-0.06wt% of an exciting agent. According to the road pavement material, road index requirements are met and the residue soil and the limestone powder can be sufficiently utilized.
Description
Technical field
The present invention relates to a kind of road pavements by dregs and agstone compound being prepared and method thereof.
Background technology
At present, along with the carrying out of expanding economy and Urbanization Construction, the dregs quantity that reconstruction of the old city town, road (subway) construction, excavation of foundation pit etc. produce every year is very huge, and not easily degrades.The dregs that often the old Urban renewal, excavation of subway etc. in a city produce can reach 2500 ten thousand steres.In China city, the transformation regulation of old urban area produces a large amount of architecture sediment, has data to show, removes 1m
2building produces 0.5-1m
3architecture sediment, every 10,000 m
2building construction process can produce 500-600t architecture sediment.But most of building waste, without any process, is just transported to countryside or surrounding city and carries out simple landfill or outdoorly to store up, cause great adverse effect to environmental protection.
At present, the building waste more than 90% that China comprises dregs is illegally processed, and resource utilization rate is less than 5%.Building waste adopts the processing mode of stacking and landfill to create very large adverse effect to environment.
Compared with other municipal refuse, dregs has 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 dregs 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.The research that China recycles dregs is more late, though achieve certain Preliminary Study Results 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 highway construction by dregs, then will produce great economic worth.
But, the content of architecture sediment as filler related fields of building the road is lacked in current art standards and norms, in urban road construction, architecture sediment utilizes and can follow without standards and norms, and how utilizing urban architecture dregs to reach good engineering effort still needs intensive research.In addition, the factors such as the standard-required of road pavements increasingly stringent, the application of dregs in road pavements is subject to many limitations, and such as dregs utilization rate is not high, and the ratio in road pavements shared by dregs is less than normal.
Limestone resource is widely distributed in China, utilizes the levigate rear admixture as road pavements of natural low-cost resource limestone to have Resource Guarantee.Agstone main component is calcium carbonate (CaCO
3), lime and limestone are used as constructional materials in a large number, are also the important source material of much industry.In recent years, the basis such as water conservancy, traffic, work China Democratic National Construction Association and the developing rapidly of civilian installation construction, face the problem that flyash is in short supply gradually, especially this situation of southwest is more outstanding, and the long distance transportation of flyash will improve concrete cost of production.Special searching one can be drawn materials nearby, the present inventor is found by research, itself and building waste, because being easy to grinding, low reaction activity, low water demand ratio, combining and road concrete can be made to have works fine and later strength, and can improve concrete early stage abrasion resistance by agstone.
CN101386504A discloses a kind of slurry slag refining technique, and it comprises the following steps: collect remaining body refuse soil; Required building material and renewable raw materials is sorted out from remaining body refuse soil; At the building material that airtight boiler combustion sorts out, and burning gases are utilized to generate electricity; Pulverize combustion product, form particle or powder; The particle or powder of pulverizing formation are mixed according to preset blending ratio with cement, then mixture is made required goods.Body refuse soil and mixed products with cement more than the present invention also provides after above-mentioned refinement.This slurry slag refining technique makes full use of discarded remaining body refuse soil, solves remaining body refuse soil increasing in Process of Urban Development, and is turned waste into wealth, recycle and make environment-friendly type water mud product.
CN103769312A discloses the construction method that a kind of slurry shield dregs process is recycled, it is characterized in that: it comprises the following steps, 1), circulating mud by being pumped into pre-cribellum enters stock tank, after the two-layer scalping vibration screening of pre-cribellum, the slag charge of particle diameter at more than 2mm is separated; 2) mud, tailed over enters the slurry storage tank below pre-sifted, one-level a cluster cyclone is delivered to by primary pump, mud removes the chiltern particle of the overwhelming majority more than 74 μm after the one-level desanding purification unit process in one-level a cluster cyclone, and the slurries after coagulation enter one-level overflow plasma discharge mud pit; 3), two stage pump delivers to second cyclone group the slurries in one-level overflow plasma discharge mud, and the secondary swirl de-mud apparatus in second cyclone group can remove the shale particle of in mud more than 20 μm, and the slurries after secondary treatment enter secondary overflow plasma discharge mud pit; 4), one-level a cluster cyclone and second cyclone group share same dewatering screen and carry out processed; 5) slurries, after secondary treatment enter mud pit, and pumped back down-hole after allotment, enters shield structure circulation system and reuse.
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 gravity separation, building waste is separated into heavy material, light material and mineral materials, and by described mineral materials after second-time breakage for the manufacture of constructional materials, the raw material of described constructional materials comprises: fibre material 5-10 part, mineral materials 40-60 part, low-water cement 20-30 part and unclassified stores 0-30 part, the manufacturing process of described constructional materials is by fibre material, mineral materials and unclassified stores mix, add low-water cement again to mix, add water stirring pulping, insert vibration moulding or extrusion forming in mould, building slab section product is formed after natural curing.In this patent document, 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 constructional materials 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 resistance.
WO2006033561A1 discloses a kind of method of building waste sorting.In the process, the building castoff being ground into preliminary dimension is joined in the liquid of settling pit, 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 pit.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 VOC that building waste produces when high-temperature process, it is by burning shell and pulverizing the VOC that produces when the porosity shell particle that produces and described material adsorb building waste high-temperature process, 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 recycling 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 " research of building waste pressing mechanical property ", Chen is high, concrete, 8th phase in 2011 (total 262nd phase), 125-127, with briquetting pressure, building waste incorporation, it is major influence factors that flyash replaces cement amount, the mechanical property of building waste pressing (MPBW) is furtherd investigate, test shows: be processed into fine aggregate with discarded concrete processing, adding cement is that the building materials that cementitious material mold pressing is made has good mechanical property, by controlling briquetting pressure, change building waste incorporation or flyash replacement cement amount, utilize building waste can produce the sheet material with excellent mechanical performances, bulk, the building materialss such as component.The document mainly for be moulded products, and garbage raw material mixed ratio is lower.
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 dregs and agstone compound prepared, it can be used in the road subbase course of urban road laying, base material and/or the steady layer of water, dregs and agstone can be utilized effectively and the performance of this road pavements can reach the requirement of urban road laying.
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, dregs and agstone compound is selected to prepare road pavements, dregs and agstone can be made mutually to supplement, collaborative to play a role, they can either be fully utilized, can also make the road pavements performance of preparation 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 exciting agent of the activated micro mist of tool, the dregs of 40-70 % by weight, the agstone of 15-30 % by weight and the 0.02-0.06 % by weight that 1-10 % by weight is obtained by waste ceramic.
The content of the activated micro mist of the described tool obtained by waste ceramic is preferably 2-10 % by weight, is more preferably 5-8 % by weight.
The content of described dregs is preferably 35-60 % by weight, more preferably 40-50 % by weight.
The content of described agstone is preferably 15-25 % by weight, more preferably 15-20 % by weight.
The content of described exciting agent is preferably 0.02-0.06 % by weight, is more preferably 0.03-0.05 % by weight.
Dregs belongs to soft material in constructional materials, and architecture sediment in roller compaction process, more serious Particle Breakage can occur and produce fine grained, thus affects making construction and the roadbed filling CBR value of road.Usual people think that agstone is inert powder, only recognize its filing effect, the present inventor also finds, agstone act as the nucleation matrix of hydrated calcium silicate (C-Si-H) in dregs, reduces nucleation barrier potential, accelerates the aquation of dregs, thus greatly can improve the density of dregs, and then improve CBR value, make it possible to the volume stability improving road, ensure durability.To be to be noted that in prior art that general what concentrate research is the performance improvement of the cement matrix of fusion agstone in addition, to study its interaction therebetween.Report is there is not yet about dregs and agstone interactional research therebetween.
Dregs of the present invention is preferably modified building dregs, and described method of modifying can comprise the following steps:
(1) architecture sediment is carried out air-dry, then pulverizes, cross 6mm sieve, collection cut size be greater than 6mm and the architecture sediment being less than 30mm as coarse fodder, particle diameter is less than the architecture sediment of 6mm as fines;
(2) described fines is mixed with pulverized limestone, then place 1-3 days under field conditions (factors), obtained first compound, wherein based on the total weight of the first compound, the content of pulverized limestone is 5-15 % by weight, and wherein, the particle diameter of pulverized limestone is less than 1mm;
(3) described coarse fodder is mixed successively with pozzolan, flyash and calcium sulfate, then 3-5 days is placed under field conditions (factors), obtained second compound, wherein based on the total weight of the second compound, pozzuolanic content is 1-5 % by weight, and the content of flyash is 5-10 % by weight, the content of calcium sulfate is 0.2-1.0 % by weight, and wherein, pozzuolanic particle diameter is less than 0.50mm, and the particle diameter of flyash is less than 1mm; With
(4) the first compound and the second compound are mixed, the weight ratio of the first compound and the second compound is 3: 1 to 1.5: 1, obtains combined modified architecture sediment.
Described calcium sulfate can be commercial sulfuric acid calcium powder, and it directly can use when not processing further.
The present inventor finds, in the basic conditions, slag is at OH
-overcome the decomposition activation energy of rich calcium phase under the strong effect of ion, first make Ca-O, Mg-O bond fission, the heap poly structure of rich calcium phase is disintegrated, generate a large amount of activity units, these activity units are unstable nascent states, can interlink, also can with the Ca in solution
2+be combined into new CSH gelinite, after rich calcium is disintegrated, the continuous structure of slag glass body is incoherent, and Si-rich phase is out exposed, OH
-under ionization, in Si-rich phase, the key such as Si-O-Si, Si-O-Al, Al-O-Al also ruptures, and vitreum is thoroughly disintegrated.SiO
4 4-, AlO
4 5-, Ca
2+ion enters solution, reconfigures, and forms new hydrated product.
In addition, pozzolan and flyash are the vitreums of a class height silicon, high alumina, low calcium, and the degree of polymerization is large, strict network, it fully will be excited active, must destroy its Si-O, Al-O key, and the fracture of Si-O key is mainly by the impact of basicity, and the fracture of Al-O key is except being subject to OH
-outside the impact of ion, go back and SO
4 2-relevant, therefore select calcium sulfate can excite pozzolan, flyash and dregs in the present invention simultaneously.The calcium sulfate discarded object that calcium sulfate produces after can coming from steam power station gypsum exhaust-gas treatment, is easy to obtain and low price.
Described road pavements does not preferably comprise cement, pitch or cement concrete.
The activated micro mist of described tool can be obtained by waste ceramic is broken, grinding.
The specific area of the activated micro mist of described tool can be 1000-3000m
2/ kg, preferred 2000-2500m
2/ kg.
Alternatively, described dregs directly can use building or structure at the dregs removed, reconstruct and/or produce in enlarging process such as, through pulverizing the material obtained, waste concrete; Or the great soil group dregs that architecture construction excavation and/or subway work excavation produce.Also described dregs can be used through the modified modification dregs obtained.
Preferably, described dregs can also be obtained by the method comprised the following steps:
(1) use crushing appliance, by broken for the waste concrete produced in the dismounting of building or structure, reconstruction and/or enlarging, then sieve, the pulverized particles of collection cut size within the scope of 2-20mm, and particle diameter is less than the pulverized particles of 2mm;
(2) the great soil group dregs of architecture construction excavation and/or the generation of subway work excavation is obtained, the pulverized particles and the calcium oxide that the particle diameter that this great soil group dregs and step (1) obtain are less than 2mm mix, and leave standstill more than 3 days at normal temperatures, preferred 3-10 days, the weight ratio of pulverized particles and calcium oxide three that the particle diameter that described great soil group dregs and step (1) obtain is less than 2mm is 1000: (10 ~ 5): (1 ~ 0.2), obtain modification great soil group dregs; With
(3) the modification great soil group dregs that the pulverized particles of particle diameter step (1) collected within the scope of 2-20mm and step (2) obtain is with (90-100): the weight ratio of (5-10) mixes, and obtains the dregs for road pavements.
The dregs obtained by the method more can play favourable synergy with micro mist and exciting agent, improves intensity and the hardness of road pavements further.
Be to be noted that 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 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 waste ceramic is carried out fragmentation, grinding, the micro mist that the performance of high surface 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 indications required by urban road laying can be reached simultaneously.Inferring its reason, may be because the concrete in building waste is compared with waste ceramic, and water imbibition 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, waste ceramic powder is used as road pavements when reacting, and can strengthen dregs aquation, improves compactness.
The present inventor also finds, the specific area of the activated micro mist of described tool is only at 1000-3000m
2effectively can play the substitution effect of cement in the scope of/kg, make the compressive strength needed for road pavements acquisition.When the specific area of micro mist is less than 1000m
2during/kg, then the lateral reactivity of this micro mist is inadequate, such as, make the compressive strength of road, cracking resistance not enough.And when specific area is greater than 3000m
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 imbibition 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 area of/more than kg, the features such as described water imbibition 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 waste ceramic can be carried out under abrasive media exists.In the present invention, the grinding of waste ceramic can be carried out under abrasive media exists, described abrasive media be preferably zirconium silicate ball and the blending agent of yttrium stable zirconium oxide ball.
In construction rubbish, waste ceramic accounts for suitable ratio, such as useless ceramic tile etc., and these be all the source that the preparation of micro mist of the present invention provides abundance.
In road pavements 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, β-glucosyl enzym and phosphatase 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 pavements of described compound bio exciting agent to be used as base material, significantly unconfined compression strength, bending resistance can draw performance, resistance to compression and anti-bending rollering modulus, especially unconfined compression strength can be made relative to the described road pavements 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 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. composite exciting agent.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, be conducive to formation and the C of entringite
3s, C
2the raising of S hydration rate, thus the activity exciting micro mist in road pavements.When pH value improves, in liquid phase, hydrogen ion concentration reduces, and balances and wants the direction of ion to move to generation silicic acid, thus the growing amount of early stage pozzolan series hydrated product in the tailings of stable ore deposit is increased, the corresponding raising of intensity.
The present inventor also finds, be sometimes difficult to make road pavements reach necessary requirement 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 composite exciting agent and described micro mist and dregs class raw material, and final discovery also preferably adds a certain amount of salt exciting agent usually.
Described composite 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 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 gauge is 0.5-2cm;
(2) short segment materials of cutting is placed in agitator tank, add the aqueous solution of surface modifier, stir evenly, the mass ratio of segment materials and surface modifier is 200: 1-500: 1, described surface modifier is crospovidone, and in solution, the concentration of crospovidone 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 heat 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 to it and strengthening process, make it have enough water resistance, 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 waste plastics in rubbish.Preferably polyethylene, more preferably LLDPE (LLDPE).Known in the art, waste plastics (as various waste plastic bottle) mainly LLDPE (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 alkali resistance, 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 waste plastics 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 waste plastics 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 preservative treatment is carried out to timber, but this needs to use anticorrisive agent, anticorrisive agent is the salt such as chromate, borate, copper arsenate normally, if be used in road pavements, very serious environment 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 constitution of timber, crospovidone is filtered out as Interfacial compatibilization agent in the Interfacial compatibilization agent used from other field a large amount of, crospovidone 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 bulking agent migration in use, be conducive to having given play to stable compatibilization effect, be conducive to the stability guaranteeing composite material simultaneously.Crospovidone 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 following steps:
The exciting agent of the activated micro mist of tool obtained by waste ceramic by 1-10 % by weight, the dregs of 40-70 % by weight, the agstone of 15-30 % by weight and 0.02-0.06 % by weight and optional 1-5 % by weight mix from the Admixture of the modification of building waste and the lumber fibre material of enhancing and optional 0.01-2 % by weight, and its order by merging is as follows:
(1) the exciting agent mixing of the activated micro mist of tool obtained by waste ceramic by 1-10 % by weight, the agstone of 15-30 % by weight and 0.02-0.06 % 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 mixed with the dregs of 40-70 % by weight, be stirred well to evenly.
The present inventor finds, all raw materials to be added simultaneously and compared with the method mixed with common in prior art, exciting agent more can excite the activity of micro mist and dregs in the method for the invention, its reason is mainly, if very large to low-down for ratio exciting agent and ratio dregs material is mixed in initial mixing step, then easily wrapped up by dregs material, thus make it be difficult to contact with micropowder material; In addition, the general granularity of agstone, compared with thin and adhesiveness is little, therefore 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 gauge is 0.5-2cm;
(2) short segment materials of cutting is placed in agitator tank, add the aqueous solution of surface modifier, stir evenly, the mass ratio of segment materials and surface modifier is 200: 1-500: 1, described surface modifier is crospovidone, and in solution, the concentration of crospovidone 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 heat 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, waste plastics 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 admixtures of preferred 0.05-2 % by weight.
Concrete admixtures of the present invention preferably comprises or copolymer 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 of C2-C6, ethyoxyl, 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 copolymer 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 copolymer 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 polymer or its similar item not yet have report.
Polymerization can adopt the polymerization of this area routine to carry out, such as polymerisation in bulk, polymerisation in solution, emulsion polymerization or suspension polymerisation.
The present inventor finds through research, by adding such Admixture, excellent water-reducing property can be provided, prevent the mobility of road pavements from reducing along with the time, be very beneficial in urban road laying, such as construction when basic unit or the steady layer of water, and make it possible to the use effectively avoiding cement, road intensity is high.
Detailed description of the invention
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 setting, the soundness method of inspection "; 2, GB/T 17671-1999 " Test method for strength of hydraulic cement mortar "; 3, cement water reducing agent quality specifications and test method JGJ 56-84; 4, GB 8076-2008; With 5, JTGE51-2009 highway stabilized with inorganic binder material test code.
Embodiment 1
The road pavements of preparation about 1 ton of weight, in this road pavements, based on its total weight, its comprise the about 14.95 % by weight activated micro mists of tool obtained by waste ceramic, the dregs of about 55 % by weight, the agstone of about 30 % by weight and about 0.05 % by weight exciting agent;
The activated micro mist of wherein said tool is obtained by jaw crusher and grinder, waste ceramic is broken, grinding, and the specific area of the micro mist of acquisition is 2100m
2/ kg;
Described dregs is modified building dregs, described method of modifying is undertaken by following steps: architecture sediment carries out air-dry by (1), then pulverizes, and crosses 6mm sieve, collection cut size be greater than 6mm and the architecture sediment being less than 30mm as coarse fodder, particle diameter is less than the architecture sediment of 6mm as fines; (2) mixed with pulverized limestone by described fines, then place 3 days under field conditions (factors), obtained first compound, wherein based on the total weight of the first compound, the content of pulverized limestone is 8 % by weight, and wherein, the particle diameter of pulverized limestone is less than 1mm; (3) described coarse fodder is mixed successively with pozzolan, flyash and calcium sulfate, then place 5 days under field conditions (factors), obtained second compound, wherein based on the total weight of the second compound, pozzuolanic content is 3 % by weight, and the content of flyash is 5 % by weight, the content of calcium sulfate is 0.6 % by weight, and wherein, pozzuolanic particle diameter is less than 0.50mm, and the particle diameter of flyash is less than 1mm; (4) the first compound and the second compound are mixed, the weight ratio of the first compound and the second compound is 2: 1, obtains combined modified architecture sediment;
Agstone produces 400 order heavy calcium carbonates from West China, Hunan Investment Co., Ltd, and calcium carbonate content is greater than 98.5 % by weight, density 2.7g/cm
3, specific area 327m
2/ kg;
Exciting agent is that TerraZyme enzyme, β-glucosyl enzym and phosphatase are with the mixture of 5: 1: 1 weight ratios.
In described road pavements preparation process, first exciting agent is fully mixed with micro mist and agstone in agitator, then mix with dregs material.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 1.80MPa, meets the requirement of strength (0.8MPa) of advanced road roadbed embankment material completely.
Comparative example 1
Prepare the road pavements of about 1 ton of weight according to the operation sequence identical with embodiment 1, the difference of itself and embodiment 1 is only that the specific area of the weight such as micro mist used 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, 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 0.72MPa, does not meet the requirement of strength of advanced road roadbed embankment material.
Comparative example 2
Prepare the road pavements of about 1 ton of weight according to the operation sequence identical with embodiment 1, the difference of itself and embodiment 1 is only that waste ceramic specific area that is broken, that grind the micro mist obtained is 630m
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 0.83MPa, only meets the requirement of strength of advanced road roadbed embankment material reluctantly.
Comparative example 3
Prepare the road pavements of 3 tons of weights according to the operation sequence identical with embodiment 1, the difference of itself and embodiment 1 is only only to use TerraZyme enzyme, i.e. the TerraZyme enzymes extraction of the weight such as other enzyme use.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 0.85MPa, also only 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 gauge be 0.5-2cm not wait segment materials;
(2) be placed in agitator tank by short segment materials of cutting, add the crospovidone aqueous solution of 25 % by weight, stir with agitator, the mass ratio of segment materials and surface modifier 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 heat 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 operation sequence 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 1.5 % 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, 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 2.2MPa, and unconfined compression strength intensity provides 22%, meets the requirement of strength of advanced road roadbed embankment material completely, and meets the unconfined compression strength requirement of speedway.
Embodiment 4: the preparation of Admixture
The chemical structural formula of monomer (I) is:
Wherein R
1for ethyl, R
2ethyoxyl, n is 5, this monomer can by by polyethylene glycol and ethylacrylic acid conveniently esterification process carry out esterification, then by esterification products and ethyoxyl 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 persulfate is added as initator, be warming up to polymerization temperature, polymerization temperature is 80 DEG C, keeps reaction 4 hours, reclaiming polymerizate after terminating reaction, is about 1500 through measuring the weight average molecular weight of gained copolymer.
Embodiment 5:
Prepare the road pavements R ' of about 1 ton of weight according to the operation sequence 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 0.3 % 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 reducing agent shrinkage ratio.
Comparative example 4:
The road pavements R of about 1 ton of weight is prepared according to the operation sequence 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 reducing agent 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 reducing agent shrinkage ratio.
Table 1: the performance comparison of different Admixture
Compared with conventional water reducing agent, water reducing agent of the present invention makes water reducing ability improve 4%, and yield reduces by 18%, 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 reducing agent can extend road pavements can reach more than one times, thus greatly extends the application 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 (6)
1. a road pavements, based on the total weight of this road pavements, it comprises the exciting agent of the activated micro mist of tool, the dregs of 40-70 % by weight, the agstone of 15-30 % by weight and the 0.02-0.06 % by weight that 1-10 % by weight is obtained by waste ceramic.
2. road pavements according to claim 1 and 2, 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 is obtained by waste ceramic is broken, grinding.
4. road pavements according to claim 3, the specific area of the activated micro mist of wherein said tool is 1000-3000m
2/ kg.
5. the road pavements according to any one of claim 1-4, wherein said exciting agent is compound bio exciting agent.
6. the preparation method of the road pavements according to any one of claim 1-5, the method comprises the following steps: the dregs of the activated micro mist of 1-10 % by weight tool, 40-70 % by weight, the agstone of 15-30 % by weight, the exciting agent of 0.02-0.06 % by weight are mixed, its order by merging is as follows:
(1) exciting agent of the activated micro mist of 1-10 % by weight tool, 15-30 % by weight agstone and 0.02-0.06 % by weight is mixed, be stirred well to evenly;
(2) mixture that step (1) obtains is mixed with 40-70 % by weight dregs, be stirred well to evenly.
Priority Applications (1)
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| CN114716255A (en) * | 2022-03-17 | 2022-07-08 | 南京理工大学 | Ceramsite modifier fired by shield muck and method for sintering ceramsite by shield muck |
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| CN1475629A (en) * | 2002-06-19 | 2004-02-18 | ������������ʽ���� | Material and method for paving |
| CN101250044A (en) * | 2008-03-28 | 2008-08-27 | 上海华威环保技术有限公司 | Road subbase course material and method for preparing same |
| CN102942320A (en) * | 2012-11-26 | 2013-02-27 | 吴翩 | Preparation method of phosphorous slag superfine powder |
| CN103274613A (en) * | 2013-06-08 | 2013-09-04 | 湖南云中沥青有限责任公司 | Cementing material for preparing road base material through using brick and concrete building wastes, and application thereof |
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| CN1475629A (en) * | 2002-06-19 | 2004-02-18 | ������������ʽ���� | Material and method for paving |
| CN101250044A (en) * | 2008-03-28 | 2008-08-27 | 上海华威环保技术有限公司 | Road subbase course material and method for preparing same |
| CN102942320A (en) * | 2012-11-26 | 2013-02-27 | 吴翩 | Preparation method of phosphorous slag superfine powder |
| CN103274613A (en) * | 2013-06-08 | 2013-09-04 | 湖南云中沥青有限责任公司 | Cementing material for preparing road base material through using brick and concrete building wastes, and application thereof |
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| CN114716255A (en) * | 2022-03-17 | 2022-07-08 | 南京理工大学 | Ceramsite modifier fired by shield muck and method for sintering ceramsite by shield muck |
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