CN106746810A - A kind of loess cured polymer material and preparation method thereof - Google Patents
A kind of loess cured polymer material and preparation method thereof Download PDFInfo
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- CN106746810A CN106746810A CN201710031577.2A CN201710031577A CN106746810A CN 106746810 A CN106746810 A CN 106746810A CN 201710031577 A CN201710031577 A CN 201710031577A CN 106746810 A CN106746810 A CN 106746810A
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- loess
- cured polymer
- polymer material
- plasticiser
- raw material
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B12/00—Cements not provided for in groups C04B7/00 - C04B11/00
- C04B12/005—Geopolymer cements, e.g. reaction products of aluminosilicates with alkali metal hydroxides or silicates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polyethers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to building materials field, and in particular to a kind of loess cured polymer material and preparation method thereof；The rate of charge of a kind of loess cured polymer material, including raw material and alkali-activator, the alkali-activator and the raw material is 1：2.6‑4.2；The raw material includes 296 367 parts of loess and 65 93 parts of flyash；The loess solidification polymer product that this programme is obtained is practical, and service behaviour is good, can be with large-scale application in the middle of Practical Project；This product application is extremely wide, can be used for loess soil carries out in-situ solidifying, improve the resistance to overturning and intensity of loess, also construction material can be prepared in construction project, such as prepare net slurry, mortar, concrete, building block, waited building element, the diversified forms such as including post, beam, plate by curved as that can be pressurized, can solve the problem that the elevated problem of the surging flyash geo-polymer preparation cost for bringing of flyash price.
Description
Technical field
The invention belongs to building materials field, and in particular to a kind of loess cured polymer material and preparation method thereof.
Background technology
With the progress of scientific and technological level, the quality of life of people also more and more higher.Traditional concrete material can not
Meet various building demands.Therefore, it has been developed that geology polymer material.
Geo-polymer can apply to many engineering fields, science of bridge building, architectural engineering, Geotechnical Engineering, the underground space
Construction and soil solidification etc..Can be used for preparing cement, concrete, brick and tile, building block, sheet material, artificial lightweight aggregate, and roadbed
Material.
Most important species is flyash geo-polymer in existing geo-polymer.Flyash geo-polymer is
Geology polymer material is generated using flyash.The raw material of flyash geo-polymer are low calcium class flyash, and they are in alkali
Geo-polymer is generated under the excitation of property exciting agent, the key property for possessing Binder Materials can be used to substitute cement, together
When solve the problems, such as the recycling of industry byproduct flyash.
But, using the geo-polymer of flyash making, its raw material flyash is in itself a kind of industry byproduct, is produced
Amount is limited, and this also causes its market price to gradually rise.With state return home production capacity policy continuation carry out, flyash geology polymerization
Thing cost can be further up.
For this reason, it may be necessary to develop a kind of new geo-polymer, its raw material is sufficient, with low cost, can be more extensive
In applying to architecture production.
The content of the invention
It is an object of the invention to provide a kind of loess cured polymer material, it is intended to solve existing flyash geology polymerization
The relatively costly problem of thing.
The present invention is achieved in that a kind of loess cured polymer material, including raw material and alkali-activator, the alkali
Property exciting agent and the raw material rate of charge be 1：2.6-4.2；The raw material include 296-367 parts loess and 65-93 part
Flyash.
Loess is a kind of unstratified Soil sediment, its granular size between clay and fine sand, in light yellow or
Yellowish-brown, is distributed widely in North America, Europe and Asia, typically now thinks what is mainly deposited by wind, often for calcareous and often
Tooth and calcium carbonate nucleation containing shell, bone and mammal, also being formed containing ferruginous concretions is aoxidized sometimes can largely water storage
High-quality soil.Loess is the earthy deposit formed away from modern about 2,000,000 years period in the Quaternary Period.Typical loess is yellow-gray
Or dust and silty sand the particulate composition of brown color, quality is homogeneous, containing volume is calcareous or loess concretion, concrete dynamic modulus, there is significant hanging down
Straight joint, it is harder when drying without layer reason, after being soaked by flowing water, it is typically easy to peel off and is corroded, or even collapse
Fall into.Loess in Large Area be present in NORTHWEST CHINA area, due to belonging to settlement by soaking soil, in fact to water and soil conservation, vegetative coverage
There is greatly detrimental effect, how to realize that loess resource is utilized is one important research of solidification polymer and application direction.
Loess is big and cheap in the storage of China, and preparing geology using the method for alkaline excitation using loess is polymerized
Thing, can substitute cement as Binder Materials.Make full use of the substantial amounts of loess natural resources of China, there is provided more extensive Building wood
Material raw material.Be conducive to energy saving, preserve the ecological environment, meet the strategic objective of sustainable development, can more reduce building materials
Cost.
Further technical scheme of the invention is：The alkali-activator is the mixed of sodium hydroxide solution and sodium silicate solution
Compound, the sodium silicate solution and the sodium hydroxide solution mass ratio are 2.3-2.7:1.The mixing of both alkaline solutions
Polymerization of the thing to loess polymeric material has preferably effect.
Further technical scheme of the invention is：The modulus of the sodium silicate solution is 2.0.The concentration is more beneficial for gathering
Close.
Further technical scheme of the invention is：The molar concentration of the sodium hydroxide solution is 14 mol/L.The concentration
It is more beneficial for polymerization.
Further technical scheme of the invention is：Also include plasticizing in the loess cured polymer material that this programme is provided
Agent, the inventory of the plasticiser accounts for the 1-3% of the material quality.Plasticiser is suitably added in maintenance processes can be obtained
The more excellent product of workability.
Further technical scheme of the invention is：The plasticiser is naphthalenesulfonate plasticiser.This plasticiser more has
Beneficial to product.
Further technical scheme of the invention is：Also include water, institute in the loess cured polymer material that this programme is provided
The inventory for stating water accounts for the 4.5-6.6% of the material quality.Water is suitably added during mix can obtain workability more
Excellent product.
Another object of the present invention is to provide a kind of preparation method of loess cured polymer material.
A kind of preparation method of loess cured polymer material, comprises the following steps, step A：Pretreatment of raw material, the original
Be mixed and stirred for for loess after sieving is processed and flyash by material pretreatment system, and the raw material includes 296-367 parts of Huang
Soil and 65-93 parts of flyash；
Step B：Alkali-activator is added, is added respectively according to sequencing to the raw material obtained in step A while tying up to stirring
Enter sodium hydroxide solution and sodium silicate solution；The sodium hydroxide solution is 1 with the mass ratio of the sodium silicate solution：2.6-
4.2；The sodium silicate solution and the sodium hydroxide solution mass ratio are 2.3-2.7：1；The modulus of the sodium silicate solution
It is 2.0；The molar concentration of the sodium hydroxide solution is 14 mol/L；
Step C：Curing step；The mixed system that the curing step system obtains step B in constant-temp. and-moisture maintenance, it is closed
Conserved under atmospheric pressure, curing temperature be 60-70 degrees Celsius, maintenance relative humidity be 90-99%, curing time for seven days with
On.
Further technical scheme of the invention is：The inventory of water, the water is added to account in maintenance processes in the step C
The 4.5-6.6% of the material quality.Water is not required the material for adding, and appropriate addition water is needed according to rheological property during preparation.
Further technical scheme of the invention is：Plasticiser is added in maintenance processes in the step C, the plasticiser
Inventory accounts for the 1-3% of the material quality, and the plasticiser is naphthalenesulfonate plasticiser.Plasticiser is not required what is added
Material, appropriate addition is needed during preparation according to rheological property.
The beneficial effects of the invention are as follows：The loess solidification polymer product that this programme is obtained is practical, and service behaviour is good
It is good, can be with large-scale application in the middle of Practical Project；This product application is extremely wide, and can be used for loess soil carries out original position admittedly
Change, improve the resistance to overturning and intensity of loess, can be used in construction project as construction material, such as prepare net slurry, mortar,
Concrete, building block etc., waited building element, the diversified forms such as including post, beam, plate by curved as that can be pressurized, and can solve the problem that fine coal
The rising of the surging flyash geo-polymer preparation cost for bringing of grey price；Additionally, the abundant development and utilization of this programme is yellow
Soil resource, is conducive to energy saving, preserves the ecological environment, and meets the strategic objective of sustainable development.
Brief description of the drawings
In order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in application, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the stress-strain relation figure of loess cured polymer material provided in an embodiment of the present invention.
Specific embodiment
The explanation of following embodiment is, with reference to additional schema, to be used to illustrate the particular implementation that the present invention may be used to implement
Example.The direction term that the present invention is previously mentioned, for example " on ", D score, "front", "rear", "left", "right", " interior ", " outward ", " side "
Deng being only the direction with reference to annexed drawings.Therefore, the direction term for using is to illustrate and understand the present invention, and is not used to
The limitation present invention.
Present invention firstly provides a kind of loess cured polymer material, including raw material and alkali-activator, the alkalescence
The rate of charge of exciting agent and the raw material is 1：2.6-4.2；The raw material includes 296-367 parts of loess and 65-93 parts of powder
Coal ash.
Loess is a kind of unstratified loam deposit, its granular size between clay and fine sand, in light yellow or
Yellowish-brown, is distributed widely in North America, Europe and Asia, typically now thinks what is mainly deposited by wind, often for calcareous and often
Tooth and calcium carbonate nucleation containing shell, bone and mammal, also being formed containing ferruginous concretions is aoxidized sometimes can largely water storage
High-quality soil.Loess is the earthy deposit formed away from modern about 2,000,000 years period in the Quaternary Period.Typical loess is yellow-gray
Or dust and silty sand the particulate composition of brown color, quality is homogeneous, containing volume is calcareous or loess concretion, concrete dynamic modulus, there is significant hanging down
Straight joint, it is harder when drying without layer reason, after being soaked by flowing water, it is typically easy to peel off and is corroded, or even collapse
Fall into.Loess in Large Area be present in NORTHWEST CHINA area, due to belonging to settlement by soaking soil, in fact to water and soil conservation, vegetative coverage
There is greatly detrimental effect, how to realize that loess resource is utilized is one important research direction of solidification polymer.
Loess is big and cheap in the storage of China, and preparing geology using the method for alkaline excitation using loess is polymerized
Thing, can substitute cement as Binder Materials.Make full use of the substantial amounts of loess natural resources of China, there is provided more extensive Building wood
Material raw material.Be conducive to energy saving, preserve the ecological environment, meet the strategic objective of sustainable development, can more reduce building materials
Cost.
Geology polymerization and gel material be one by silicon and aluminium ion as skeleton chain structure.It is with natural zeolite knot
Structure is similar, and with unformed microstructure, analysis on the whole has the characteristic of crystal structure.Polymerization process is substantially in height
Carried out under the conditions of alkali, so causing the polymer to form chain and the polymerization knot of ring-type comprising-Si-O-Al-O-key
Structure.Chemical general formula can be expressed as follows：
Mn[―(SiO2)z―AlO2]n•wH2O
Wherein, M is alkali element or cation such as potassium, sodium, calcium；Symbol "-" shows the presence of chemical bond；During n is polymerization process
The degree of polycondensation；Z is 1,2,3 or higher, until 32.
Main there occurs of loess solidification polymerization in this programme react as follows：
With following reaction：
Preferably, the alkali-activator is the mixture of sodium hydroxide solution and sodium silicate solution, the sodium silicate solution and
The sodium hydroxide solution mass ratio is 2.3-2.7：1.The mixture of both alkaline solutions is to loess polymeric material
Polymerization has preferably effect.
Preferably, the modulus of the sodium silicate solution is 2.0.The concentration is more beneficial for polymerization.
Preferably, the molar concentration of the sodium hydroxide solution is 14 mol/L.The concentration is more beneficial for polymerization.
Preferably, plasticiser is also included in the loess cured polymer material that this programme is provided, the plasticiser feeds intake
Amount accounts for the 1-3% of the material quality.Plasticiser is suitably added in maintenance processes can obtain the more excellent product of workability
Product.
Preferably, the plasticiser is naphthalenesulfonate plasticiser.This plasticiser is more beneficial for product.
Preferably, water is also included in the loess cured polymer material that this programme is provided, the inventory of the water accounts for described
The 4.5-6.6% of material quality.Water is suitably added in maintenance processes can obtain the more excellent product of workability.
Another object of the present invention is to provide a kind of preparation method of loess cured polymer material.
A kind of preparation method of loess cured polymer material, comprises the following steps, step A：Pretreatment of raw material, the original
Be mixed and stirred for for loess after sieving is processed and flyash by material pretreatment system, and the raw material includes 296-367 parts of Huang
Soil and 65-93 parts of flyash；
Step B：Alkali-activator is added, is added respectively according to sequencing to the raw material obtained in step A while tying up to stirring
Enter sodium hydroxide solution and sodium silicate solution；The quality sum and the original of the sodium hydroxide solution and the sodium silicate solution
The rate of charge of material is 1：2.6-4.2；The sodium silicate solution and the sodium hydroxide solution mass ratio are 2.3-2.7：1；Institute
The modulus for stating sodium silicate solution is 2.0；The molar concentration of the sodium hydroxide solution is 14 mol/L；
Step C：Curing step；The mixed system that the curing step system obtains step B in constant-temp. and-moisture maintenance, it is closed
Conserved under atmospheric pressure, curing temperature be 60-70 degrees Celsius, maintenance relative humidity be 90-99%, curing time for seven days with
On.
Preferably, in the step C inventory of water, the water can be added to account for the material quality in maintenance processes
4.5-6.6%.Water is not required the material for adding, and appropriate addition water is needed according to rheological property during preparation.
Preferably, in the step C inventory of plasticiser, the plasticiser can be added to account for the original in maintenance processes
Expect the 1-3% of quality, the plasticiser is naphthalenesulfonate plasticiser.Plasticiser be not required add material, during preparation according to
Rheological property needs appropriate addition.
This programme is made with reference to specific embodiment being explained further.
Specific embodiment 1-3 is the material that the loess cured polymer material preparation method provided using this programme is prepared
The rate of charge of material.
Specific embodiment 1：
| Ratio | Flyash | Loess | NaOH solution | Na2SiO3Solution | External adding water | Plasticiser |
| 20% | 80kg | 320kg | 40kg | 100kg | 23kg | 5kg |
Specific embodiment 2：
| Ratio | Flyash | Loess | NaOH solution | Na2SiO3Solution | External adding water | Plasticiser |
| 20% | 93kg | 296kg | 37kg | 110kg | 26kg | 11kg |
Specific embodiment 3：
| Ratio | Flyash | Loess | NaOH solution | Na2SiO3Solution | External adding water | Plasticiser |
| 20% | 65kg | 367kg | 45kg | 90kg | 20kg | 4.5kg |
The modulus of wherein described sodium silicate solution is 2.0；The molar concentration of the sodium hydroxide solution is 14 mol/L.
Fig. 1 is the stress-strain relation figure of the loess cured polymer material that the embodiment of the present invention 1 is provided.
The stress strain curve of loess and flyash mixed base geology polymer material in figure is observed, overall trend is
Rate of change between early stage ess-strain is strained is gradually increased, until at about 0.01 microstrain, rate of change starts to keep constant, bent
Line is on a declining curve immediately, and stress-strain relation is presented negatively correlated, until material damage.Peak stress appears in microstrain
At 0.026.Illustrate that the material possesses certain mechanical strength.
The loess solidification polymer product that this programme is obtained is practical, and service behaviour is good, can with large-scale application in
In the middle of Practical Project；This product application is extremely wide, and can be used for loess soil carries out in-situ solidifying, improves the overall steady of loess
Qualitative and intensity, can be used in construction project as construction material, such as prepare slurry, mortar, concrete, building block only, can be with
Waited building element, the diversified forms such as including post, beam, plate by curved as being pressurized, can solve the problem that flyash price is surging and bring
The rising of flyash geo-polymer preparation cost；Additionally, the abundant development and utilization loess resource of this programme, is conducive to saving energy
Source, preserve the ecological environment, meet the strategic objective of sustainable development.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of loess cured polymer material, it is characterised in that：Including raw material and alkali-activator, the alkali-activator and
The rate of charge of the raw material is 1：2.6-4.2；The raw material includes 296-367 parts of loess and 65-93 parts of flyash.
2. loess cured polymer material according to claim 1, it is characterised in that：The alkali-activator is hydroxide
The ratio between solution quality of the mixture of sodium solution and sodium silicate solution, the sodium silicate solution and the sodium hydroxide solution is
2.3-2.7：1.
3. loess cured polymer material according to claim 2, it is characterised in that：The modulus of the sodium silicate solution is
2.0。
4. loess cured polymer material according to claim 2, it is characterised in that：The sodium hydroxide solution mole
Concentration is 14 mol/L.
5. loess cured polymer material according to claim 1, it is characterised in that：The loess cured polymer material
In also include plasticiser, the inventory of the plasticiser accounts for the 1-3% of the material quality.
6. loess cured polymer material according to claim 5, it is characterised in that：The plasticiser is naphthalenesulfonate
Plasticiser.
7. loess cured polymer material according to claim 1, it is characterised in that：The loess cured polymer material
In also include water, the inventory of the water accounts for the 4.5-6.6% of the material quality.
8. a kind of preparation method of loess cured polymer material, it is characterised in that comprise the following steps：
Step A：Loess after sieving is processed is mixed and stirred by pretreatment of raw material, the pretreatment of raw material system with flyash
Mix, the raw material includes 296-367 parts of loess and 65-93 parts of flyash；
Step B：Alkali-activator is added, is added respectively according to sequencing to the raw material obtained in step A while tying up to stirring
Enter sodium hydroxide solution and sodium silicate solution；The quality sum and the original of the sodium hydroxide solution and the sodium silicate solution
The rate of charge of material is 1：2.6-4.2；The sodium silicate solution and the sodium hydroxide solution mass ratio are 2.3-2.7：1；Institute
The modulus for stating sodium silicate solution is 2.0；The molar concentration of the sodium hydroxide solution is 14 mol/L；
Step C：Curing step；The mixture that the curing step system obtains step B in constant-temp. and-moisture maintenance, it is closed big
Conserved under air pressure, curing temperature is 60-70 degrees Celsius, maintenance relative humidity is 90-99%, curing time is more than seven days.
9. loess cured polymer material according to claim 8 and preparation method thereof, it is characterised in that：The step C
Water is added in middle maintenance processes, the inventory of the water accounts for the 4.5-6.6% of the material quality.
10. loess cured polymer material according to claim 8 and preparation method thereof, it is characterised in that：The step C
Plasticiser is added in middle maintenance processes, the inventory of the plasticiser accounts for the 1-3% of the material quality, and the plasticiser is naphthalene
Sulfonates plasticiser.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710009841 | 2017-01-06 | ||
| CN2017100098412 | 2017-01-06 |
Publications (1)
| Publication Number | Publication Date |
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| CN106746810A true CN106746810A (en) | 2017-05-31 |
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ID=58946006
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109320147A (en) * | 2018-11-12 | 2019-02-12 | 兰州大学 | A kind of loess solidifies the preparation method for hitting real brick |
| CN112608188A (en) * | 2021-01-25 | 2021-04-06 | 西北师范大学 | Preparation method of loess-based geopolymer compound slow-release fertilizer |
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| CN101708983A (en) * | 2009-09-07 | 2010-05-19 | 中国地质大学（北京） | Burning-free geology polymer material of red mud coal ash and preparation method thereof |
| CN103936344A (en) * | 2014-01-24 | 2014-07-23 | 天地科技股份有限公司 | Loess fly ash-based coal mine filling material, and filling method thereof |
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2017
- 2017-01-17 CN CN201710031577.2A patent/CN106746810A/en active Pending
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|---|---|---|---|---|
| CN101708983A (en) * | 2009-09-07 | 2010-05-19 | 中国地质大学（北京） | Burning-free geology polymer material of red mud coal ash and preparation method thereof |
| CN103936344A (en) * | 2014-01-24 | 2014-07-23 | 天地科技股份有限公司 | Loess fly ash-based coal mine filling material, and filling method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109320147A (en) * | 2018-11-12 | 2019-02-12 | 兰州大学 | A kind of loess solidifies the preparation method for hitting real brick |
| CN112608188A (en) * | 2021-01-25 | 2021-04-06 | 西北师范大学 | Preparation method of loess-based geopolymer compound slow-release fertilizer |
| CN112608188B (en) * | 2021-01-25 | 2022-06-14 | 西北师范大学 | Preparation method of loess-based geopolymer compound slow-release fertilizer |
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Application publication date: 20170531 |