CN104446045B - A kind of alkali-activated carbonatite Binder Materials and preparation method thereof - Google Patents

A kind of alkali-activated carbonatite Binder Materials and preparation method thereof Download PDF

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CN104446045B
CN104446045B CN201410618006.5A CN201410618006A CN104446045B CN 104446045 B CN104446045 B CN 104446045B CN 201410618006 A CN201410618006 A CN 201410618006A CN 104446045 B CN104446045 B CN 104446045B
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alkali
binder materials
activated carbonatite
iron tailings
carbonatite binder
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CN201410618006.5A
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CN104446045A (en
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李北星
叶茂
冯紫豪
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武汉理工大学
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding

Abstract

The present invention relates to a kind of alkali-activated carbonatite Binder Materials utilizing siliceous iron tailings to prepare and preparation method thereof, include following steps: 1) by siliceous iron tailings powder, flyash and slag powders according to proportioning mix homogeneously, obtain iron tailings powder fly-ash mine ground-slag composite granule;2) liquid glass and water are mixed, prepare alkali activating agent solution;3) alkali activating agent solution is joined in composite granule, be uniformly mixing to obtain alkali-activated carbonatite Binder Materials slurry;4) alkali-activated carbonatite Binder Materials slurry is injected in mould vibration moulding and under normal temperature condition maintenance to the demoulding, obtain alkali-activated carbonatite Binder Materials and only starch test specimen;5) alkali-activated carbonatite Binder Materials is starched test specimen only and carry out steam-cured.The beneficial effects of the present invention is: the alkali-activated carbonatite Binder Materials hardened paste that the present invention provides possesses excellent mechanical property, 3 d comprcssive strength > 60 MPa of optimal proportion, 28 d comprcssive strength > 80 MPa.

Description

A kind of alkali-activated carbonatite Binder Materials and preparation method thereof
Technical field
The invention belongs to building material field, particularly relate to a kind of alkali-activated carbonatite Binder Materials utilizing siliceous iron tailings to prepare and Preparation method.
Background technology
China accumulates at present and stores up mine tailing 10,000,000,000 more than t, year quantum of output reached 1,200,000,000 t, account for national large industrial solid give up Gurry year produces the 45.8% of total amount, accounts for more than the 50% of whole world mine tailing quantum of output.Industry large with flyash, gangue etc. Solid waste is compared, and the comprehensive utilization technique of mine tailing is more complicated, difficulty is bigger.At present, the comprehensive utilization ratio of China's mine tailing is only Having 13.3%, by contrast, the comprehensive utilization of mine tailing lags behind other large industrial solid castoff significantly.Wherein, iron tailings Generation amount maximum, in China, all kinds of mine tailing generation amount proportion reaches 45%, and annual emissions was from 1.37 hundred million t of 2000 Quickly rising to 5.36 hundred million tons of 2009, the accumulative generation amount of only 10 years just reaches 28.32 hundred million tons.Storing up in a large number of iron tailings Not only occupy soil and cause the waste of resource, and containing the harmful substances such as heavy metal and thin mine tailing in part iron tailings The airborne dusts that granule causes etc. bring severe contamination and harm to groundwater resources, human habitat, destroy ecological balance, existing By the extensive concern of the whole society.
The mineral composition of iron tailings is mainly constitutionally stable gangue mineral, such as quartz, Anhydrite, pyroxene, garnet, hornblend Deng, almost without activity, simultaneously along with the raising of technique of preparing, the median of mine tailing is down to by 200 μm before the more than ten years 40 present μm, are not suitable for the most even if being used as its particle diameter of concrete aggregate.Therefore, greatly limit its approach of dissolving.For Solve ferrum tail environmental pollution and the problem of the wasting of resources, take the suitable means to excite the gelation activity of iron tailings, then by it Much new research is had to occur as cement mixture and concrete admixture.It is summed up, the raising hands of iron tailings gelation activity In the predominantly organic tool grinding of section, chemi-excitation, thermal activation or three kinds of exciting means, any two kinds are combined.Such as, patent of invention CN103011648A " a kind of modified active iron tailing admixture for concrete and preparation method thereof " discloses one and utilizes polycarboxylic acids Salt water reducer carries out the method that surface modification improves its activity to iron tailings, and the Modified Iron mine tailing activity using the method to produce blends The activity of material is with suitable with II grade of flyash, but polycarboxylate dehydragent the most only plays dispersion grind-aiding effect, only helps to ferrum tail The raising of ore deposit fineness, can not excite the chemism of iron tailings." one utilizes iron tailings to patent of invention CN102850011A Prepare the process of RPC " disclose one and utilize mechanical force to activate SiO2The iron tailings of content 69%, makes It is as the reactive powder component of RPC, is lived as fine aggregate preparation by the iron tailings of 0.16mm~1.25mm simultaneously The method of property powder concrete, but there are some researches show that mechanical grinding can not improve the chemism of iron tailings, iron tailings is at room temperature Lower main based on physics filling effect;Therefore, seek another kind iron tailings more extensive, more effective active modification method to seem Particularly important.Through retrieval, have no that the pertinent literature preparing alkali-activated carbonatite Binder Materials for primary raw material with iron tailings is open at present.
Summary of the invention
The invention provides one and prepare alkali-activated carbonatite Binder Materials and preparation method thereof with siliceous iron tailings for primary raw material, expand The comprehensive utilization face of iron tailings, solves iron tailings and stores up caused environmental pollution and problem of resource waste, also expand meanwhile The raw material range of alkali-activated carbonatite Binder Materials, solving is main to prepare alkali-activated carbonatite glue with slag, metakaolin and flyash at present The problem that during gel material, raw material sources is limited, relatively costly.
The present invention solves above-mentioned technical problem and be the technical scheme is that a kind of alkali-activated carbonatite Binder Materials, includes by siliceous ferrum Composite granule that mine tailing, flyash and slag powders are formed, account for composite granule weight 5%~15% liquid glass, account for multiple Closing the water of powder body weight 15%~30%, described composite granule each constituent mass percentage composition is: siliceous iron tailings powder 50%~75%, Flyash 0~45%, slag powders 5%~50%.
By such scheme, described composite granule each constituent mass percentage composition is: siliceous iron tailings powder 50~75%, flyash 15~ 25%, slag powders 35~50%.
By such scheme, described composite granule each constituent mass percentage composition is: siliceous iron tailings powder 50%, flyash 15%, Slag powders 35%.
By such scheme, described siliceous iron tailings powder is that siliceous iron tailings raw ore is milled to specific surface area 300m2/ kg~600m2/kg。
By such scheme, described siliceous iron tailings powder is that siliceous iron tailings raw ore is milled to specific surface area 300m2/ kg~400m2/kg。
By such scheme, described liquid glass modulus n is 1.0~2.0.
The preparation method of described alkali-activated carbonatite Binder Materials, includes following steps:
1) by siliceous iron tailings powder, flyash and slag powders according to proportioning mix homogeneously, iron tailings powder fly-ash slag is obtained Powder composite granule, described composite granule each constituent mass percentage composition is: siliceous iron tailings powder 50%~75%, flyash 0~ 45%, slag powders 5%~50%;
2) liquid glass and water are mixed, prepare alkali activating agent solution;Wherein the quality of liquid glass accounts for composite granule weight 5%~15%, water accounts for composite granule weight 15%~30%;
3) alkali activating agent solution is joined in composite granule, be uniformly mixing to obtain alkali-activated carbonatite Binder Materials slurry;
4) alkali-activated carbonatite Binder Materials slurry is injected in mould vibration moulding and under normal temperature condition maintenance to the demoulding, obtain alkali-activated carbonatite Binder Materials starches test specimen only;
5) alkali-activated carbonatite Binder Materials is starched test specimen only and carry out steam-cured.
By such scheme, described steam curing temperature is 40~80 DEG C, and the steam-cured time is 0~15h.
The siliceous iron tailings base alkali-activated carbonatite Binder Materials that the present invention provides, with iron tailings as primary raw material, adds flyash and slag powders The content ratio of the element such as silicon, aluminum, calcium in regulation system, with the liquid glass of suitable modulus as alkali-activator, through molding, The operation such as steam-cured is prepared from.Reaction mechanism is, iron tailings, flyash and the composite powder material of slag powders composition, at water There is depolymerization under the effect of glass alkali-activator, aqueous medium regroups into new gelinite.
The beneficial effects of the present invention is: with the siliceous iron tailings of inertia widely of originating as primary raw material, not only expand iron tailings Comprehensive utilization of resources approach, the problem solving the resource waste and pollution environment that iron tailings is stored up for a long time, and extend alkali The raw material sources that excited cementing material produces.Compared with the Binder Materials production process such as traditional portland cement, the present invention provides Alkali-activated carbonatite Binder Materials preparation process without high-temperature calcination, be greatly saved production cost, decrease manufacture of cement high resource, High-energy source consumes and high CO2Discharge, is a kind of novel low carbon Binder Materials.Additionally, the alkali-activated carbonatite Binder Materials that the present invention provides Hardened paste possesses excellent mechanical property, 3d comprcssive strength > 60MPa, the 28d comprcssive strength > 80MPa of optimal proportion. Therefore, alkali-activated carbonatite Binder Materials that the present invention provides and preparation method thereof has wide market application foreground.
Detailed description of the invention
The alkali-activated carbonatite Binder Materials that the present invention provides is that the composite granule by siliceous iron tailings powder, flyash and slag powders is at waterglass Exciting under obtain.Its composition of raw materials includes the component of following weight/mass percentage composition: 50%~75% siliceous iron tailings powder, 5%~ (iron tailings powder, flyash, slag powders percentage composition sum are 100%, are formed multiple for 50% slag powders, 0~45% flyash Close powder body), account for the liquid glass of composite granule weight 5%~15%, account for the water of composite granule weight 15%~30%.Wherein:
The siliceous iron tailings powder of one of composite powder raw material, is to be milled to meet specific surface in ball mill by siliceous iron tailings raw ore Amass as 300m2/ kg~600m2The powder body gained of/kg.The preferably specific surface area of iron tailings powder is 300m2/ kg~400m2/kg。 Iron tailings powder proportion in composite granule is 50%~75%, preferably 50%.
The flyash of one of composite powder raw material is II grade of flyash of F class, and specific surface area is 427m2/ kg, flyash is compound In powder body, proportion is 0~45%, preferably 15%.The purpose adding flyash in powder is for silicon in regulation system Element and the ratio of aluminium element, make system extent of polymerization after alkali-activated carbonatite higher, thus have more preferable mechanical property.
The slag powders of one of composite powder raw material is S75 level ground slag powder, and specific surface area is 405m2/ kg, slag powders is multiple Closing proportion in powder is 5%~50%, preferably 35%.In powder, add slag powders can significantly improve alkali-activated carbonatite gelling The early mechanics characteristics of test specimen starched only by material.
The alkali-activator of one of Binder Materials raw material is the waterglass (Na of modulus 1.0~2.02O·nSiO2), its volume is compound The 5%~15% of powder weight, preferably 10% (volume is with Na in water glass solution2O·nSiO2Quality meter).Different moulds Liquid glass (the Na of number n2O·nSiO2) it is that the undisturbed industry waterglass that chemical pure NaOH is added modulus n=3.3 is adjusted Joint obtains.
Additionally, prepare 15%~30% that alkali-activated carbonatite Binder Materials starches that required water content is composite granule quality only, preferably 20%.
The chemical composition unit of the powder body material of alkali-activated carbonatite Binder Materials: wt% prepared by table 1
The present invention furthermore provides and prepares alkali-activated carbonatite Binder Materials and the clean method starching test specimen thereof by aforementioned each proportioning raw materials, specifically Can comprise the following steps that
1), after iron tailings raw ore is dried, in ball mill, it is milled to meet the requirement of iron tailings powder specific surface area;
2) iron tailings powder, flyash and slag powders are uniformly mixed according to proportioning, obtain iron tailings powder flyash breeze and be combined Powder;
3) volume requirement and the liquid glass of gouache ratio requirement and water addition iron tailings powder flyash breeze composite powder will be met In material, it is uniformly mixing to obtain alkali-activated carbonatite Binder Materials slurry;
4) alkali-activated carbonatite Binder Materials slurry is injected in mould vibration moulding and under normal temperature condition maintenance to the demoulding, obtain alkali-activated carbonatite Binder Materials starches test specimen only;
5) alkali-activated carbonatite Binder Materials is starched test specimen only and carry out steam-cured, natural curing at 20 ± 2 DEG C again after steam-cured end.
Embodiment premised on technical solution of the present invention under implement, give detailed embodiment and concrete operating process, Embodiment contributes to understanding the present invention, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1: the composite powder different ratio impact on the alkali-activated carbonatite Binder Materials performance with iron tailings as primary raw material.
First the industrial waterglass (water content 64%) that modulus n is 3.3 is mixed by weight 1:0.1 with chemical pure NaOH, The system that stirs under room temperature makes modulus of water glass n be adjusted to 1.5, and alkali-activated carbonatite Binder Materials is starched test specimen by detection composite powder different ratio only The impact of mechanical property, the preparation method of alkali-activated carbonatite Binder Materials of the present invention comprises the following steps:
After siliceous iron tailings raw ore is dried, being milled to specific surface area in ball mill is 350m2/kg。
The siliceous iron tailings powder, flyash and the slag powders that obtain after grinding are mixed according to different proportion, obtains iron tailings powder powder Fly ash-slag powder composite powder material.
To account for composite powder material quality 10%, modulus is the liquid glass (Na of 1.52O·nSiO2) and account for composite powder body constitution The water mixing of the 20% of amount, makes alkali activating agent solution, is incorporated in composite powder material by alkali activating agent solution, clean at cement After slurry blender stirs 3min, inject 40 × 40 × 40mm3Vibrating the closely knit molding of 1min in punching block, room temperature maintenance is to the demoulding After at 50 DEG C steam-cured 10h.In corresponding age, the gained clean slurry test specimen after steam-cured is carried out strength test.
Test result is as shown in table 2.
3d, 7d, 28d intensity of the alkali-activated carbonatite Binder Materials sample of table 2 different composite powder proportioning
As can be seen from Table 2, the proportioning of composite powder material is to affect one of important factor of alkali-activated carbonatite Binder Materials mechanical property. When in composite powder material, iron tailings powder content accounts for 50%, and fly ash content 15%, during slag powders content 35%, alkali-activated carbonatite is gelled 3d, 7d and 28d comprcssive strength of test specimen starched only by material can respectively reach 64.5MPa, 80.0MPa and 82.3MPa.
As can be seen from Table 2, in iron tailings powder, interpolation flyash is because regulating sial element ratio in composite powder material, Thus improve the extent of polymerization of Binder Materials slurry, strengthen its mechanical property;Slag powders is added in composite powder material, permissible Significantly improving the early strength of alkali-activated carbonatite Binder Materials, when slag powders content increases to 35%, the 7d comprcssive strength of test specimen can To reach more than 80Ma.
Embodiment 2: the modulus of waterglass and the content impact on the alkali-activated carbonatite Binder Materials performance with iron tailings as primary raw material.
First chemical pure NaOH is added modulus (the modulation ratio of regulation waterglass in undisturbed industry waterglass (modulus n=3.3) Example is shown in Table 3), the modulus of detection waterglass and the content impact on alkali-activated carbonatite Binder Materials being starched only test specimen mechanical property, the present invention The preparation method of alkali-activated carbonatite Binder Materials comprises the following steps:
After siliceous iron tailings raw ore is dried, being milled to specific surface area in ball mill is 350m2/kg。
The flyash of siliceous iron tailings powder, the slag powders of 35% and 15% that mass percent is 50% is mixed, obtains ferrum tail Breeze fly-ash mine ground-slag composite powder material.
Different moduluses and the waterglass of content are mixed and made into alkali activating agent solution, by alkali with the water of account for composite granule quality 20% Exciting agent solution is incorporated in composite powder material, after stirring 3min, injects 40 × 40 × 40mm in agitator for cement mortar3 Punching block in vibrate the closely knit molding of 1min, after room temperature maintenance to the demoulding at 50 DEG C steam-cured 10h, prepare alkali-activated carbonatite Binder Materials Only test specimen is starched.In corresponding age, clean slurry test specimen is carried out strength test.
Test result is as shown in table 3.
3d, 7d, 28d intensity of the alkali-activated carbonatite Binder Materials sample of the different modulus of water glass of table 3 and content
As can be seen from Table 3, the modulus of waterglass be affect alkali-activated carbonatite Binder Materials only starch of test specimen mechanical property important because of Element.Alkali-activated carbonatite Binder Materials intensity difference prepared by modulus waterglass between 1.0~2.0 is little, shows apparently higher than modulus The intensity of alkali-activated carbonatite Binder Materials prepared by the waterglass more than 2.0, wherein when modulus of water glass is at n=1.5, Binder Materials is clean 3d, 7d and 28d comprcssive strength of slurry test specimen can reach 64.5,80.0 and 82.3MPa, and each age strength is the highest.
As can be seen from Table 3, the mechanical property of waterglass content in alkali-activated carbonatite Binder Materials also this test specimen of appreciable impact.Increase The content adding alkali-activator waterglass can improve degree and the extent of polymerization of slurry that composite powder is excited, thus promotes The mechanical property of test specimen, but when alkali-activator too high levels, test specimen there will be accumulation of salt in the surface soil phenomenon, along with age increases, the accumulation of salt in the surface soil The structure of test specimen can be destroyed, make test specimen ftracture, later strength generation retraction.
Embodiment 3: the water content impact on the alkali-activated carbonatite Binder Materials performance with iron tailings as primary raw material.
The industrial waterglass (water content 64%) that modulus n is 3.3 is mixed by weight 1:0.1 with chemical pure NaOH, room temperature Lower stirring makes modulus of water glass n be adjusted to 1.5, and alkali-activated carbonatite Binder Materials is starched the shadow of test specimen mechanical property by detection different gouache ratio only Ringing, the preparation method of alkali-activated carbonatite Binder Materials of the present invention comprises the following steps:
After siliceous iron tailings raw ore is dried, being milled to specific surface area in ball mill is 350m2/kg。
The flyash of siliceous iron tailings powder, the slag powders of 35% and 15% that mass percent is 50% is mixed, obtains composite powder Material.
To account for powder body material quality 10%, modulus is the waterglass (Na of 1.52O·nSiO2) and the water of different content be mixed Alkali activating agent solution, is incorporated into alkali activating agent solution in composite powder material, after stirring 3min in agitator for cement mortar, Inject 40 × 40 × 40mm3Punching block in vibrate the closely knit molding of 1min, after room temperature maintenance to the demoulding at 50 DEG C steam-cured 10h, Prepare alkali-activated carbonatite Binder Materials and only starch test specimen.In corresponding age, clean slurry test specimen is carried out strength test.
Test result is as shown in table 4.
3d, 7d, 28d intensity of the alkali-activated carbonatite Binder Materials sample of the different gouache ratio of table 4
As can be seen from Table 4, preparing alkali-activated carbonatite Binder Materials when only starching test specimen, water volume is affect test specimen mechanical property one Factor always.When water content is 20%, test specimen has best mechanical property.This is because, composite powder is using water as Jie Matter, under the effect of alkali, the key in structure is interrupted depolymerization, regroups into new polymer then as scattering and disappearing of moisture. Water content increase can increase the porosity in the middle of test specimen so that it is mechanical properties decrease.If it addition, water content is too low, on the one hand The depolymehzation process of composite powder cannot be sufficiently complete, and reduces the extent of polymerization of slurry, and on the other hand, the lowest meeting of water content increases Add slurry denseness and be unfavorable for molding so that paste structure is uneven and closely knit, reduce its mechanical property.
Embodiment 4: the iron tailings fineness impact on the alkali-activated carbonatite Binder Materials performance with iron tailings as primary raw material.
The industrial waterglass (water content 64%) that modulus n is 3.3 is mixed by weight 1:0.1 with chemical pure NaOH, room temperature Lower stirring system makes modulus of water glass n be adjusted to 1.5, and alkali-activated carbonatite Binder Materials is starched test specimen mechanical property by detection different iron tailings fineness only The impact of energy, the preparation method of alkali-activated carbonatite Binder Materials of the present invention comprises the following steps:
After siliceous iron tailings raw ore is dried, in ball mill, ball milling different time is 300~600m with prepared specific surface area2/ kg's Iron tailings powder.
The flyash of siliceous iron tailings powder, the slag powders of 35% and 15% that mass percent is 50% is mixed, obtains composite powder Material.
To account for composite powder material quality 10%, modulus is the liquid glass (Na of 1.52O·nSiO2) and account for composite powder body constitution Measure 20% water mixing, make alkali activating agent solution, alkali activating agent solution is incorporated in composite powder material, stirs at cement paste Mix after machine stirs 3min, inject 40 × 40 × 40mm3Punching block in vibrate the closely knit molding of 1min, after room temperature maintenance to the demoulding Steam-cured 10h at 50 DEG C, prepares alkali-activated carbonatite Binder Materials and only starches test specimen.In corresponding age, clean slurry test specimen is carried out strength test.
Test result is as shown in table 5.
3d, 7d, 28d intensity of the alkali-activated carbonatite Binder Materials sample of table 5 different fineness iron tailings powder
As can be seen from Table 5, the mechanical property of the specific surface area of iron tailings more appreciable impact alkali-activated carbonatite Binder Materials.When ferrum tail (less than 300m when the specific surface area of breeze is relatively low2/ kg), the iron tailings powder lateral reactivity degree that is stimulated is relatively low, corresponding resistance to compression Intensity is relatively low.Along with iron tailings powder specific surface area increase, iron tailings powder activity be stimulated degree improve, mechanical property promote.So And, when iron tailings powder specific surface area increases to 350m2After/more than kg, under conditions of identical watering quantity, the workability of slurry has Being reduced, the slurry viscosity after stirring increases, mobility is deteriorated, and molding difficulty increases, and causes defect in test specimen more, mechanics Performance is the most impaired.
As can be seen from Table 5, it is 350m when iron tailings powder specific surface area2During/kg, clean 3d, 7d, 28d intensity starching test specimen Reach the highest, respectively 64.5MPa, 80.0MPa and 82.3MPa.When specific surface area continues to increase, comprcssive strength will not Continue therewith to increase, moreover fineness increase can increase production cost, so from the point of view of economy and technical angle, iron tailings powder Specific surface area 300~400m2/ kg scope is preferable to the performance of alkali-activated carbonatite Binder Materials performance of the present invention.
Embodiment 5: steam curing temperature and the time impact on the alkali-activated carbonatite Binder Materials performance with iron tailings as primary raw material.
The industrial waterglass (water content 64%) that modulus n is 3.3 is mixed by weight 1:0.1 with chemical pure NaOH, room temperature Lower stirring system makes modulus of water glass n be adjusted to 1.5, and alkali-activated carbonatite Binder Materials is starched test specimen mechanical property by detection curing temperature and time only The impact of energy, the preparation method of alkali-activated carbonatite Binder Materials of the present invention comprises the following steps:
After siliceous iron tailings raw ore is dried, being milled to specific surface area in ball mill is 350m2/kg。
The flyash of siliceous iron tailings powder, the slag powders of 35% and 15% that mass percent is 50% is mixed, obtains iron tailings Powder fly-ash mine ground-slag composite granule.
To account for composite powder material quality 10%, modulus is the liquid glass (Na of 1.52O·nSiO2) and account for composite powder body constitution Measure 20% water mixing, make alkali activating agent solution, alkali activating agent solution is incorporated in composite powder material, stirs at cement paste Mix after machine stirs 3min, inject 40 × 40 × 40mm3Punching block in vibrate the closely knit molding of 1min, after room temperature maintenance to the demoulding The most steam-cured different time, prepares alkali-activated carbonatite Binder Materials and only starches test specimen.In corresponding age, clean slurry test specimen is carried out Strength test.
Test result is as shown in table 6.
The different steam curing temperature of table 6 and 3d, 7d, 28d intensity of the alkali-activated carbonatite Binder Materials sample of time
As can be seen from Table 6, the early mechanics characteristics of alkali-activated carbonatite Binder Materials is had a significant impact by different steam curing temperatures and time. As test specimen steam-cured 10h at 50 DEG C, 3d, 7d, 28d intensity of clean slurry test specimen can reach the highest, respectively 64.5MPa, 80.0MPa and 82.3MPa.Continue to improve steam curing temperature or extend the steam-cured time the most notable to the raising of test specimen early mechanics characteristics.
By various embodiments above it can be seen that the alkali-activated carbonatite Binder Materials with siliceous iron tailings as base material of present invention offer, permissible Use the iron tailings powder of volume more than 50%, not only reduce iron tailings and store up the pollution to environment, also solve iron tailings and store up The problem taking a large amount of land resource.It addition, the method preparing alkali-activated carbonatite Binder Materials that the present invention provides is without calcining, reduce The production cost of Binder Materials, is the concrete embodiment of recycling economy and science green technology.

Claims (7)

1. an alkali-activated carbonatite Binder Materials, include be made up of siliceous iron tailings powder, flyash and slag powders composite granule, Accounting for the liquid glass of composite granule weight 5%~15%, account for the water of composite granule weight 15%~30%, described composite granule is each Constituent mass percentage composition is: siliceous iron tailings powder 50%~75%, flyash 0~45%, slag powders 5%~50%;Described Siliceous iron tailings powder is that siliceous iron tailings raw ore is milled to specific surface area 300m2/ kg~600m2/kg。
Alkali-activated carbonatite Binder Materials the most according to claim 1, it is characterised in that: described composite granule each constituent mass percentage Content is: siliceous iron tailings powder 50~75%, flyash 15~25%, slag powders 35~50%.
Alkali-activated carbonatite Binder Materials the most according to claim 2, it is characterised in that: described composite granule each constituent mass percentage Content is: siliceous iron tailings powder 50%, flyash 15%, slag powders 35%.
Alkali-activated carbonatite Binder Materials the most according to claim 1, it is characterised in that: described siliceous iron tailings powder is by siliceous ferrum Mine tailing raw ore is milled to specific surface area 300m2/ kg~400m2/kg。
Alkali-activated carbonatite Binder Materials the most according to claim 1, it is characterised in that: described liquid glass modulus n be 1.0~ 2.0。
6. the preparation method of the alkali-activated carbonatite Binder Materials described in claim 1, includes following steps:
1) by siliceous iron tailings powder, flyash and slag powders according to proportioning mix homogeneously, iron tailings powder fly-ash slag is obtained Powder composite granule, described composite granule each constituent mass percentage composition is: siliceous iron tailings powder 50%~75%, flyash 0~ 45%, slag powders 5%~50%;
2) liquid glass and water are mixed, prepare alkali activating agent solution;Wherein the quality of liquid glass accounts for composite granule weight 5%~15%, water accounts for composite granule weight 15%~30%;
3) alkali activating agent solution is joined in composite granule, be uniformly mixing to obtain alkali-activated carbonatite Binder Materials slurry;
4) alkali-activated carbonatite Binder Materials slurry is injected in mould vibration moulding and under normal temperature condition maintenance to the demoulding, obtain alkali-activated carbonatite Binder Materials starches test specimen only;
5) alkali-activated carbonatite Binder Materials is starched test specimen only and carry out steam-cured.
The preparation method of alkali-activated carbonatite Binder Materials the most according to claim 6, it is characterised in that described steam curing temperature is 40~80 DEG C, the steam-cured time is 0~15h.
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CN106431025A (en) * 2016-08-31 2017-02-22 中国建筑材料科学研究总院 Alkali-activated cementing material and preparation method thereof
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