CN103601462B - A kind of non-cement mine tailing concrete grouting material for transmission tower foundation - Google Patents
A kind of non-cement mine tailing concrete grouting material for transmission tower foundation Download PDFInfo
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- CN103601462B CN103601462B CN201310629141.5A CN201310629141A CN103601462B CN 103601462 B CN103601462 B CN 103601462B CN 201310629141 A CN201310629141 A CN 201310629141A CN 103601462 B CN103601462 B CN 103601462B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention belongs to concrete grouting material field, relate to the mine tailing concrete grouting material of a kind of non-cement of installing for electric power line pole tower.The material butt batching of the mine tailing concrete grouting material of non-cement provided by the invention is by slag micropowders 20%-28%, slag micro powder 12%-17%, desulfurated plaster 5%-7%, carbide slurry 1%-3%, the water of middle coarse grain mine tailing 45%-55%, material butt quality 13%-15% and the high-efficiency water-reducing agent of poly-carboxylic acid of material butt quality 0.2%-0.5% are made.The mine tailing concrete grouting material low cost of non-cement provided by the invention, performance be high, reduce discharging and save a large amount of silicate cement, solves large-scale high-performance electric power line pole tower and install the raising grouting anchoring type basic property being badly in need of solving and the difficult problem keeping low cost.
Description
[technical field]
The present invention relates to concrete grouting material, specifically relate to a kind of mine tailing concrete grouting material of the non-cement for transmission line tower foundation.
[background technology]
Along with transmitting line is constantly to maximization and high performance development, the performance requriements of pole and tower foundation is also being improved constantly.In order to control shaft tower installation cost in good basement rock bare land and improve basic installation quality, generally do not adopt the installation method of large-scale basement rock excavation and casting large concrete foundation, but adopt the installation method of boring and grouting anchoring on basement rock.Generally adopt cement based fine concrete as anchor grouting material at present, strength grade of concrete is C30 and C40.Along with transmission tower is constantly to maximization and high performance development, there is the situation that drawing force can not satisfy the demands in this conventional grout material.Be badly in need of strength grade higher, stronger to the bond stress of reinforcing bar, and the grouting material of tool microdilatancy effect.
On the other hand, ordinary Portland cement is per GDP CO
2a kind of starting material that discharge intensity is high.And the slag micropowder be made up of granulated blast-furnace slag can replace part of cement to a certain extent in concrete becomes common recognition.In fact, because calcium/silicon mol ratio in slag is close to 1, and the calcium/silicon mol ratio in cement clinker is close to 3.Therefore, slag provide the potential of silicon-oxy tetrahedron be the 2-3 of cement clinker doubly.But past employing Vertical Mill or tube mill can only by slag milling to specific surface area 450m
2about/kg, is equivalent to D90≤30 μm, D50≤10 μm.And in cement concrete system, be only less than 5 μm ultra tiny slag powders particle could in 28 days 100% participate in hydration reaction.Current Commercial Ore ground-slag is applied in cement concrete system only to have an appointment and 20% ~ 30% can participates in hydration reaction in 28 days.Recently, the appearance of the large-scale air-flow grinding machine of industrialization supersaturated vapor power, can to realize levigate for slag powders with lower energy consumption to specific surface area 800m
2/ more than kg, is equivalent to D90≤8 μm, D50≤3 μm.And grinding energy and cost and employing vertical mill by slag milling to specific surface area 450m
2about/kg is suitable.This has just established basic substance for slag micropowders discharges more to provide the potential of silicon-oxy tetrahedron and form C-S-H gel in hydration process.
Patent of invention (CN102351492A) " a kind of Machine-made Sand microdilatancy height early-strength grouting material and preparation method thereof ", this invention relates to a kind of Machine-made Sand microdilatancy height early-strength grouting material and preparation method thereof.Grouting material is made up of the raw material of following weight percents, and component 1-5%, enhancement component 1-5% are reduced in Machine-made Sand 40-55%, ordinary Portland cement 40-55%, expansion; Component is reduced in described expansion be high-alumina cement and anhydrite by 0.5-1.5: 1 weight ratio compositely to form, enhancement component be polycarboxylate water-reducer dry powder and silicon ash by 0.05-0.15: 1 weight ratio mix; During preparation, said components is carried out two-stage to be dry mixed, namely make the grouting material of this invention.This invention product has the excellent properties such as early strength is high, microdilatancy ungauged regions, can be widely used in foot bolt fastening, the aspect such as the reinforcing of back-grouting that equipment is installed and the beam of buildings, plate, post and terrace, and range of application is wider.But the high-alumina cement adopted in this invention is all the starting material of cost ratio ordinary Portland cement high several times and tens times as enhancement component as microdilatancy component and silicon ash, and main bonding component is ordinary Portland cement, fine aggregate is Machine-made Sand, therefore cause this grouting material production cost higher, be not suitable for extensive pole and tower foundation and install and use.Ordinary Portland cement ratio is up to 40%-55% in addition, does not meet the whole world and reduces discharging CO
2with energy-conservation development trend.Patent of invention (CN101921086A) " a kind of cement-based ultra-high strength contraction-free grouting concrete ", this invention proposes a kind of cement-based ultra-high strength contraction-free grouting concrete, be made up of cement, quartz sand, water reducer, swelling agent, defoamer, anti-settling agent, steel fiber, retardant, water-holding agent, each components in mass portion number proportioning is: cement 100 parts, swelling agent 5 ~ 10 parts, quartz sand 50 ~ 100 parts, water reducer 0.5 ~ 2.5 part, defoamer 0.3 ~ 1.0 part, anti-settling agent 0.1 ~ 0.3 part, steel fiber 5 ~ 30 parts, retardant 0 ~ 1.0 part, water-holding agent 0.1 ~ 0.3 part.This beneficial effect of the invention is: the ultimate compression strength of 1d under cement-based grouting material normal temperature is brought up to more than 70MPa by (1); (2) ultimate compression strength of 28d under cement-based grouting material normal temperature is brought up to more than 120MPa; (3) this cement-based ultra-high strength shrinking-free grouting material can be used for the installation of large-scale, superhuge Equipment Foundations, and requires the higher occasion such as bolt anchoring, structural strengthening, pavement patching to injection material ultimate compression strength.This invention is owing to employing the high price starting material of steel fiber, aerosil etc. several ten thousand yuan/ton, and production cost is higher, is more not suitable for large-scale pole and tower foundation and installs and uses.In addition in this material filling still containing the ordinary Portland cement of vast scale, therefore still can not solve few use and the difficult problem without cement clinker and energy-saving and emission-reduction.
[summary of the invention]
In order to overcome the deficiencies in the prior art, the invention provides a kind of low cost, performance high and not cement grog the 100% fine aggregate grouting material adopting solid waste, for the grouting anchor foundation of good basement rock bare land electric power line pole tower.
For achieving the above object, the present invention is by the following technical solutions:
The invention provides a kind of non-cement mine tailing concrete grouting material for transmission tower foundation, be made up of mixture butt material, water and water reducer, wherein not cement grog in mixture, whole employing industry and mining industry solid waste, comprise slag micropowders, slag micro powder, desulfurated plaster, carbide slurry, middle coarse grain mine tailing.
A kind of non-cement mine tailing concrete grouting material for transmission tower foundation provided by the invention, wherein, mixture is by slag micropowders 20%-28%, slag micro powder 12%-17%, desulfurated plaster 5%-7%, carbide slurry 1%-3%, and middle coarse grain mine tailing 45%-55% forms.Slag micropowders specific surface area is 800-900m
2/ kg, obtains by the large-scale airflow milling of supersaturated vapor power is machine-processed.
A kind of non-cement mine tailing concrete grouting material for transmission tower foundation provided by the invention, wherein, slag micro powder specific surface area is 400-500m
2/ kg, grinds obtained by the steel tailings after the vexed method pre-treatment of heat after blanking major part metallic iron.
A kind of non-cement mine tailing concrete grouting material for transmission tower foundation provided by the invention, wherein, desulfurated plaster is with terra alba or calcium sulphate hemihydrate be main component coal-fired flue gas desulfurization gypsum or relieving haperacidity waste-gas desulfurization gypsum; Carbide slurry is adopt calcium carbide to produce the industrial residue produced in acetylene gas process; Middle coarse grain mine tailing is the fine-grained solids waste of discharging in metal mine ore dressing process.
The middle coarse grain mine tailing that in the present invention, mixture adopts, meets the part of GB/T14684-2001 building sand standard.
A kind of non-cement mine tailing concrete grouting material for transmission tower foundation provided by the invention, wherein water accounts for the 13%-15% of mixture butt quality, water reducer accounts for the 0.2%-0.5% of mixture butt quality of material, water reducer is high-efficiency water-reducing agent of poly-carboxylic acid, and above-mentioned material proportion is pressed butt mass percent and calculated.
Non-cement mine tailing concrete grouting material provided by the invention is a kind of fine aggregate grouting material of 100% employing solid waste, for the grouting anchor foundation of good basement rock bare land electric power line pole tower.This grouting material replaces natural sandstone as fine aggregate, using slag micropowders, slag micro powder, desulfurated plaster and carbide slurry as the main component of gelling material using middle coarse grain mine tailing.Wherein slag micro powder is as main microdilatancy component, the collaborative forming process of ettringite and C-S-H gel is as secondary expansion source, giving full play to slag micropowders has than the cement clinker height 2-3 potential providing silicon-oxy tetrahedron and formation C-S-H gel doubly, form high performance grouting material, for the grouting anchor foundation of electric power line pole tower.
After mixture batching the present invention adopted stirs, gained slurry has Self-leveling performance.Slurry is filled in the boring of constructing in advance, needs before perfusion by engineering design plan (EDP) reserved steel bar and bolt in boring.Within 3-28 days, shaft tower installation can be carried out after slurry sclerosis.
Non-cement mine tailing concrete grouting material provided by the invention, after slurry body pours into boring, there is aquation in residual f-CaO and f-MgO in slag, produces the volumetric expansion of about 98% and 148% respectively.But because f-CaO and f-MgO residual in the vexed method slag of heat is little, and slag is by superfine pulverizing, and therefore its expansion is disperseed, show just microdilatancy on the overall volume after slurry sclerosis.In slag also can there is hydration reaction in the rich magnesium RO phase particle of superfine particle part on a small quantity in addition, makes extra contribution to microdilatancy.On the other hand, most of f-CaO and f-MgO is converted into Ca(OH by hot vexed method slag in preprocessing process)
2and Mg(OH)
2, these components play active effect by the pozzolanic activity reaction of activated slag.And C in slag
2s and C
3the aquation of S can produce C-S-H gel, produces contribution, also continue to discharge Ca(OH simultaneously to grouting body intensity)
2, as the reactant of slag micropowders volcano active reaction.The desulfurated plaster added can promote that following reaction is carried out:
（1）4H
3AlO
2 4 -+6CaO
2++6CaSO
4·2H
2O+4OH
-+44H
2O→2(3CaO·Al
2O
3·3CaSO
4·32H
2O)
H in its Chinese style (1)
3alO
4 2-there is provided primarily of the continuous dissolving of slag micropowders in basic solution.And the hydrated product of slag and carbide slurry can provide C endlessly
a 2+and OH
-.Formation in formula (1) reaction is ettringite.At saturated Ca(OH)
2in solution, ettringite has extremely low solubleness and ionic product, itself and H
3alO
4 2-equilibrium concentration than slag micropowders and H
3alO
4 2-dissolution equilibrium concentration low tens times.Therefore, the continuous formation of ettringite just constantly can break the H in slag micropowders and solution
3alO
4 2-dissolution equilibrium, promote that the aluminum oxide in slag micropowders constantly dissolves, and ettringite is constantly formed.On the other hand, in slag, aluminum oxide all exists with aluminum-oxygen tetrahedron form, and connects into glass network body with silicon-oxy tetrahedron.Therefore, the stripping of aluminum-oxygen tetrahedron inherently makes the vitreum network of slag surface constantly dissociate, and discharges a large amount of highly active silicon-oxy tetrahedron or silicon-oxy tetrahedron group.Their understand the Ca fast and in solution
2+reaction forms C-S-H gel.Therefore, the symplastic growth adding aquation and C-S-H gel and the ettringite greatly facilitating slag micropowders of desulfurated plaster.That the fast synergistic facilitating C-S-H gel and ettringite under the drive owing to reacting in formula (1) grows, cause the quick growth of the fast hydration of slag and grouting body intensity, give full play to slag micropowders can provide 2-3 times of silicon-oxy tetrahedron potential than cement clinker more simultaneously.In addition, the formation of more ettringite also serves positive contribution to the microdilatancy of grout hardens body.Therefore, the premium propertiess such as the high strength in the present invention after grouting material hydration and hardening and microdilatancy are that various solid wastes reacts to each other, synergistic result.
Compared with prior art, the present invention has following excellent effect:
(1) non-cement mine tailing concrete grouting material provided by the invention, 100% utilizes solid waste to prepare, and solves large-scale high-performance electric power line pole tower and installs the raising grouting anchoring type basic property being badly in need of solving and keep the difficult problem of low cost;
(2) non-cement mine tailing concrete grouting material provided by the invention has high-performance, and strength grade is higher, stronger to the bond stress of reinforcing bar, and tool microdilatancy effect;
(3) non-cement mine tailing concrete grouting material provided by the invention, not cement, compares with other strength cement-based grouting material existing with existing common cement-base fine concrete, saves a large amount of silicate cement, reduces discharging CO
2;
(4) non-cement mine tailing concrete grouting material provided by the invention, makes full use of reacting to each other and synergy between various solid waste, facilitates the high value added utilization of solid waste.
[embodiment]
Embodiment 1
The proportioning that the present embodiment grouting material presses butt mass percent is as follows: slag micropowders 25%, slag micro powder 12%, desulfurated plaster 7%, carbide slurry 1%, middle coarse grain mine tailing 55%, the additional water of butt quality of material 14% and account for the high-efficiency water-reducing agent of poly-carboxylic acid of butt quality of material 0.3% of accounting for.After above-mentioned batching being stirred, gained slurry has Self-leveling performance.Slurry is filled in the boring of constructing in advance, by engineering design plan (EDP) reserved steel bar and bolt in boring before perfusion.Slurry sclerosis carries out shaft tower installation in latter 3 days.Slag micropowders is the slag micropowders that the large-scale air-flow grinding machine of supersaturated vapor power grinds, and specific surface area is 900m
2/ kg; Slag micro powder is the slag micro powder that grinds of steel tailings after hot vexed method pre-treatment and after blanking major part metallic iron, and specific surface area is 410m
2/ kg; Desulfurated plaster is take terra alba as the coal-fired flue gas desulfurization gypsum of main component.Carbide slurry is adopt calcium carbide to produce the industrial residue produced in acetylene gas process; Middle coarse grain mine tailing is the fine-grained solids waste of discharging in magnetite quartzite sections mine ore dressing process, and the part meeting GB/T14684-2001 building sand standard that classified machining obtains.The salient features of gained grouting material is in table 1.
The salient features of table 1 grouting material
Embodiment 2
The proportioning that the present embodiment grouting material presses butt mass percent is as follows: slag micropowders 24%, slag micro powder 13%, desulfurated plaster 7%, carbide slurry 3%, middle coarse grain mine tailing 53%, the additional water of butt quality of material 13% and account for the high-efficiency water-reducing agent of poly-carboxylic acid of butt quality of material 0.3% of accounting for.After above-mentioned batching being stirred, gained slurry has Self-leveling performance.Slurry is filled in the boring of constructing in advance, by engineering design plan (EDP) reserved steel bar and bolt in boring before perfusion.Slurry sclerosis carries out shaft tower installation in latter 5 days.Slag micropowders is the slag micropowders that the large-scale air-flow grinding machine of supersaturated vapor power grinds, and specific surface area is 880m
2/ kg, slag micro powder is the slag micro powder that grinds of steel tailings after hot vexed method pre-treatment and after blanking major part metallic iron, and specific surface area is 430m
2/ kg; Desulfurated plaster is take terra alba as the coal-fired flue gas desulfurization gypsum of main component.Carbide slurry is adopt calcium carbide to produce the industrial residue produced in acetylene gas process; Middle coarse grain mine tailing is the fine-grained solids waste of discharging in magnetite quartzite sections mine ore dressing process, and the part meeting GB/T14684-2001 building sand standard that classified machining obtains.The salient features of gained grouting material is in table 2.
The salient features of table 2 grouting material
Embodiment 3
The proportioning that the present embodiment grouting material presses butt mass percent is as follows: slag micropowders 28%, slag micro powder 17%, desulfurated plaster 7%, carbide slurry 3%, middle coarse grain mine tailing 45%, the additional water of butt quality of material 15% and account for the high-efficiency water-reducing agent of poly-carboxylic acid of butt quality of material 0.4% of accounting for.After above-mentioned batching being stirred, gained slurry has Self-leveling performance.Slurry is filled in the boring of constructing in advance, needs before perfusion by engineering design plan (EDP) reserved steel bar and bolt in boring.Slurry sclerosis can carry out shaft tower installation in latter 3 days.Slag micropowders is the slag micropowders that the large-scale air-flow grinding machine of supersaturated vapor power grinds, and specific surface area is 890m
2/ kg; Slag micro powder is the slag micro powder that grinds of steel tailings after hot vexed method pre-treatment and after blanking major part metallic iron, and specific surface area is 490m
2/ kg; Desulfurated plaster is with terra alba or calcium sulphate hemihydrate be main component coal-fired flue gas desulfurization gypsum or relieving haperacidity waste-gas desulfurization gypsum.Carbide slurry is adopt calcium carbide to produce the industrial residue produced in acetylene gas process; Middle coarse grain mine tailing is the fine-grained solids waste of discharging in magnetite quartzite sections mine ore dressing process, and the part meeting GB/T14684-2001 building sand standard that classified machining obtains.The salient features of gained grouting material is in table 3.
The salient features of table 3 grouting material
From above-mentioned data, various embodiments of the present invention ultimate compression strength, High anti bending strength, the cohesive strength of grout hardens body to reinforcing bar is high, represents that bond stress is strong.
According to specific exemplary embodiment, invention has been described herein.It will be apparent under not departing from the scope of the present invention, carrying out suitable replacement to one skilled in the art or revise.Exemplary embodiment is only illustrative, instead of the restriction to scope of the present invention, and scope of the present invention is defined by appended claim.
Claims (11)
1. for a non-cement mine tailing concrete grouting material for transmission tower foundation, be made up of mixture, water and water reducer, it is characterized in that described mixture not cement grog; Described mixture is industry and mining industry solid waste;
Described mixture is by slag micropowders 20%-28%, slag micro powder 12%-17%, desulfurated plaster 5%-7%, carbide slurry 1%-3%, and middle coarse grain mine tailing 45%-55% forms, and above-mentioned material proportion is pressed butt mass percent and calculated.
2. a kind of non-cement mine tailing concrete grouting material for transmission tower foundation as claimed in claim 1, is characterized in that described slag micropowders specific surface area is 800-900m
2/ kg.
3. a kind of non-cement mine tailing concrete grouting material for transmission tower foundation as claimed in claim 2, is characterized in that described slag micropowders is machine-processed by the large-scale airflow milling of supersaturated vapor power.
4. a kind of non-cement mine tailing concrete grouting material for transmission tower foundation as claimed in claim 1, is characterized in that described slag micro powder specific surface area is 400-500m
2/ kg.
5. a kind of non-cement mine tailing concrete grouting material for transmission tower foundation as claimed in claim 4, is characterized in that described slag micro powder grinds obtained by the steel tailings after the vexed method pre-treatment of heat after blanking major part metallic iron.
6. a kind of non-cement mine tailing concrete grouting material for transmission tower foundation as claimed in claim 1, is characterized in that described desulfurated plaster is with terra alba or calcium sulphate hemihydrate be main component coal-fired flue gas desulfurization gypsum or relieving haperacidity waste-gas desulfurization gypsum.
7. a kind of non-cement mine tailing concrete grouting material for transmission tower foundation as claimed in claim 1, is characterized in that described carbide slurry is adopt calcium carbide to produce the industrial residue produced in acetylene gas process.
8. a kind of non-cement mine tailing concrete grouting material for transmission tower foundation as claimed in claim 1, is characterized in that described middle coarse grain mine tailing is the fine-grained solids waste of discharging in metal mine ore dressing process.
9. a kind of non-cement mine tailing concrete grouting material for transmission tower foundation as claimed in claim 1, is characterized in that described water accounts for the 13%-15% of mixture butt quality.
10. a kind of non-cement mine tailing concrete grouting material for transmission tower foundation as claimed in claim 1, is characterized in that described water reducer accounts for the 0.2%-0.5% of mixture butt quality of material.
11. a kind of non-cement mine tailing concrete grouting material for transmission tower foundation as claimed in claim 10, is characterized in that described water reducer is high-efficiency water-reducing agent of poly-carboxylic acid.
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| CN104446328B (en) * | 2014-11-04 | 2016-06-15 | 河北金泰成建材股份有限公司 | A kind of many solid wastes are worked in coordination with and are utilized the method producing premixed and pumped high performance concrete |
| CN106316312A (en) * | 2015-06-15 | 2017-01-11 | 新疆宇鑫混凝土有限公司 | Clinker-free cement concrete prepared by using building garbage micro-powder |
| CN106495581B (en) * | 2016-10-31 | 2018-02-09 | 华北水利水电大学 | Grouting material reinforced for road and preparation method thereof |
| CN107915435B (en) * | 2017-11-28 | 2020-04-07 | 中国建筑材料科学研究总院有限公司 | Low-temperature-sensitive self-stress quick-hardening sleeve grouting material for connecting steel bars |
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