CN103232182B - Geopolymer/emulsified asphalt composite material and preparation method thereof - Google Patents

Geopolymer/emulsified asphalt composite material and preparation method thereof Download PDF

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CN103232182B
CN103232182B CN201310143484.0A CN201310143484A CN103232182B CN 103232182 B CN103232182 B CN 103232182B CN 201310143484 A CN201310143484 A CN 201310143484A CN 103232182 B CN103232182 B CN 103232182B
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geopolymer
parts
water glass
emulsified bitumen
matrix material
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CN103232182A (en
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刘乐平
崔学民
匡丕桩
贺艳
邓家喜
谢成
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Guangxi University
Guangxi Transportation Research Institute
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Guangxi University
Guangxi Transportation Research Institute
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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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding

Abstract

The invention discloses a geopolymer/emulsified asphalt composite material and a preparation method thereof. The geopolymer/emulsified asphalt composite material is mainly composed of the following components parts by weight: 75-95 parts of geopolymer slurry and 5-25 parts of emulsified asphalt. The geopolymer is prepared by mixing alkali-excited active material and modified water glass in a mass ratio of 1:1. The alkali-excited active material is one or mixture of more than two of metakaolin, slag and fly ash. The emulsified asphalt is industrial emulsified asphalt of which the solid content is 50-70%. The composite material has the advantages of favorable properties, high strength, high toughness and simple and feasible preparation technique.

Description

A kind of geopolymer/emulsified bitumen matrix material and preparation method thereof
Technical field
The invention belongs to field of material engineering technology, relate to a kind of geopolymer base organic/inorganic composite material and preparation method thereof.
Background technology
The application of geology polymer material can be traced back to ancient times, with kaolin, dolomite or limestone and salt lake composition Na 2cO 3, plant ash composition K 2cO 3generation rostone reacts.Geopolymer is the eighties of last century end of the seventies, and first French scientist Davidovits puts forward.Due to little (1.3~1.9 gcm of this material volume density ~3), high-strength light; Erosion resistance, hydrothermal, volumetric shrinkage are little, high high-temp stability and weather resistance good; There is the advantages such as environmental protection simultaneously; Make it become gradually in recent years one of very active material of research in the world.But the problems such as its bending resistance, tensile strength are low, and resistance to impact shock is poor, and fragility is large, easy to crack, these have all limited its development and application.
Geopolymer base composite material of plant fiber has been prepared by Guangxi University, when rice hulls content in matrix material reaches 12.81 % of gross weight, bagasse volume reaches 8.00 %, and when the volume of total vegetable fibre reaches 20.81 %, the folding strength of matrix material reaches 2.53 MPa.28 days high compressive strengths of cold-application composite asphalt concrete material prepared by Chang An University are 2.99 MPa, and maximum folding strength is 1.68 MPa.Traditional pitch (emulsified bitumen) concrete material belongs to semi-rigid material, and traditional asphalt concrete composite material is prone to the shortcoming such as cohesiveness, weather resistance deficiency on actual road in the middle of by process.
Patent of invention (patent No. 200910022109.4,200910022883.5,201210081093.6) discloses respectively the preparation method of a kind of organic polymer, a kind of organic fibre and a kind of polyvinyl chloride (PVC) RESINS and geopolymer composite gelled material, by compound above, the folding strength of the matrix material of preparation obtains some raisings.No matter but overall fiber or other organic polymers all exist the distinct disadvantage such as expensive, complex forming technology, this has limited its development and application.
Summary of the invention
The object of the invention is to the large defect of poor toughness, fragility that excites geopolymer gelling material to exist for alkali in prior art, a kind of method of the gelling material of preparing high strength and high tenacity is provided.Geopolymer/emulsified bitumen matrix material can be widely used in the fields such as material for road repair, insulating material, finishing material, has the features such as waterproof, fire prevention, weather resisteant are good, erosion resistance.
To achieve these goals, the present invention has adopted following technical scheme:
A kind of geopolymer/emulsified bitumen matrix material, it is mainly made up of the component of following parts by weight: 75~95 parts of geopolymer slurries and 5~25 parts of emulsified bitumens; Described geopolymer slurry is mainly made up of the component of following parts by weight: 50~60 parts of alkali stimulating activity materials and 50~60 parts of modified water glass.
This geopolymer/emulsified bitumen matrix material is first within 15~30 minutes, to prepare geopolymer slurry by 50~60 parts of alkali stimulating activity materials and 50~60 parts of modified water glass mix and blends, again 75~95 parts of geopolymer slurries are mixed after 5 minutes with 5~25 parts of emulsified bitumens, geopolymer/emulsified bitumen mixture slurry is injected to mould maintenance a kind of geopolymer/emulsified bitumen matrix material that maintenance certain hour obtains at a certain temperature.
Further illustrate as of the present invention, above-described geopolymer/emulsified bitumen matrix material is mainly made up of the component of following preferred parts by weight: 75 parts of geopolymer slurries and 25 parts of emulsified bitumens; Described geopolymer slurry is formed for the preferred proportion of 1:1 is mixed with in mass ratio by alkali stimulating activity material and modified water glass.
Further illustrate as of the present invention, above-described alkali stimulating activity material is one or more the mixture in metakaolin, slag and flyash.In the time adopting the mixture of two or more raw materials, can be mixed to get by the raw material of arbitrary proportion.
Further illustrate as of the present invention, it is the industrial emulsion pitch of 50~70 % that above-described emulsified bitumen adopts solid content.
Further illustrate as of the present invention, above-described modified water glass is that to be hybridly prepared into modulus be 1.0~2.0 modified water glass solution for industrial sodium silicate solution or industrial potash water glass solution and NaOH.
Modulus is that 1.0~2.0 modified water glass solution reacts and can generate the geology polymer material that intensity is higher with alkali stimulating activity material, in the too high solution of modulus, alkali concn is too low, alkali stimulating activity material reacts insufficient with modified water glass, the geology polymer material intensity generating is too low, modulus is too low, modified water glass and alkali stimulating activity material speed of response are too fast, and reaction heat is high, are not easy operation.
The effect of modified water glass is to react and generate geopolymer slurry with the alkali stimulating activity material such as metakaolin, slag, flyash.Geopolymer slurry mixes after fixing with emulsified bitumen, can prepare a kind of organic/inorganic composite material, and this material is with a wide range of applications in road repair field.
Water glass, i.e. water glass, is commonly called as flower bulb alkali, is a kind of water-soluble silicate, and its aqueous solution is commonly called as water glass, is a kind of ore deposit tamanori.Its chemical formula is R 2on SiO 2, R in formula 2o is alkalimetal oxide, and n is the ratio of silicon-dioxide and alkalimetal oxide mole number, is called the modulus of water glass.Its cohesive force is strong, intensity is higher, acid resistance, good heat resistance.
Further illustrate as of the present invention, above-described metakaolin adopts and under the condition of 600~800 DEG C, calcines by the above kaolin of 200 order the powder obtaining after 1.5~2.5 h; Described slag adopts by hardening granulated blast-furnace slag through grinding to 200~1000 object powder; Described flyash is that 400~1000 orders, quality reach powder more than secondary.
A method of preparing above-mentioned geopolymer/emulsified bitumen matrix material, the method comprises following processing step:
(1) preparation of modified water glass solution: add caustic soda to mix in industrial sodium silicate solution or industrial potash water glass solution, make modulus and be 1.0~2.0 modified water glass solution;
(2) preparation of geopolymer slurry: choose alkali stimulating activity material, be placed in high speed dispersor, the modified water glass that then adds the step (1) of corresponding parts by weight to prepare, stirs, obtains geopolymer slip;
(3) preparation of geopolymer/emulsified bitumen matrix material: the emulsified bitumen of getting corresponding parts by weight joins in the geopolymer slip in step (2), high-speed stirring 5 minutes, after mixing and stirring, pour into a mould or suppress in mould, maintenance 0.5~7 day, and to keep curing temperature be 20~90 DEG C; After the demoulding, be geopolymer/emulsified bitumen matrix material.
The present invention is mainly the method for utilizing emulsified bitumen geopolymer to be carried out to toughness reinforcing enhancing, can effectively solve the shortcoming of general emulsified bitulith material early anti pressured intension deficiency; The ultimate compression strength of geopolymer/emulsified bitumen matrix material prepared by the present invention is between the MPa of 10.O~97.2, and folding strength is between 2.0~15.2 MPa.
Advantage of the present invention:
(1) matrix material has merged the characteristic of geopolymer and emulsified bitumen, waterproof, fire performance, weather resisteant, corrosion-resistant, and performance is obviously better than similar matrix material of the prior art;
(2) adopt normal temperature cast or compression moulding, low temperature reservation (20~90 DEG C), technique is simple, nontoxic pollution-free;
(3) starting material wide material sources such as alkali stimulating activity material (in metakaolin, slag, flyash one or more mix), water glass, emulsified bitumen or be industrial residue, cost is low, can solve waste utilization problem.
Embodiment
Below in conjunction with specific examples, the present invention is further described, but protection scope of the present invention is not limit these embodiment.
Embodiment 1:
A kind of geopolymer/emulsified bitumen matrix material, it is mainly made up of the component of following parts by weight: 75 parts of geopolymer slurries and 25 parts of emulsified bitumens; And geopolymer is mainly made up of the component of following parts by weight: 50 parts of alkali stimulating activity materials and 50 parts of moduluses are 1.2 modified water glass.It is the industrial emulsion pitch of 50 % that emulsified bitumen adopts solid content.Alkali stimulating activity material adopts and under the condition of 800 DEG C, calcines by the above kaolin of 200 order the metakaolin powder obtaining after 2 h.
The preparation method of above-mentioned geopolymer/emulsified bitumen matrix material, the processing step of the method is:
(1) preparation of modified water glass solution: add NaOH to mix in industrial sodium silicate solution, make modulus and be 1.2 modified water glass solution;
(2) preparation of geopolymer slurry: meter by weight, choose the water glass mix and blend 15 minutes that 50 ㎏ metakaolins and 50 ㎏ moduluses are 1.2, acquisition geopolymer slip;
(3) preparation of geopolymer/emulsified bitumen matrix material: meter by weight, 25 ㎏ emulsified bitumens add in 75 ㎏ geopolymer slips, and high-speed stirring 3 minutes, is cast in after mixing and stirring in mould, maintenance 7 days, and to keep curing temperature be 20 DEG C; After the demoulding, be geopolymer/emulsified bitumen matrix material.
Through measuring, the ultimate compression strength of this matrix material reaches 58.7 MPa, and compressive modulus of elasticity is 380.1 MPa, and folding strength is 11.8 MPa, and bending elastic modulus is 1.1 GPa.
Embodiment 2:
A kind of geopolymer/emulsified bitumen matrix material, it is mainly made up of the component of following parts by weight: 80 parts of geopolymer slurries and 20 parts of emulsified bitumens; And geopolymer is mainly made up of the component of following parts by weight: 50 parts of alkali stimulating activity materials and 50 parts of moduluses are 2.0 modified water glass.It is the industrial emulsion pitch of 70 % that emulsified bitumen adopts solid content.Described alkali stimulating activity material is 400 order slag powders.
The preparation method of above-mentioned geopolymer/emulsified bitumen matrix material, the processing step of the method is:
(1) preparation of modified water glass solution: add NaOH to mix in industrial sodium silicate solution, make modulus and be 2.0 modified water glass solution;
(2) preparation of geopolymer slurry: meter by weight, choose the water glass mix and blend 30 minutes that 50 ㎏ slag powders and 50 ㎏ moduluses are 2.0, acquisition geopolymer slip;
(3) preparation of geopolymer/emulsified bitumen matrix material: meter by weight, getting 20 ㎏ emulsification part pitches joins in 80 ㎏ geopolymer slips in step (2), high-speed stirring 5 minutes, after mixing and stirring, suppress in mould, maintenance 0.5 day, and to keep curing temperature be 90 DEG C; After the demoulding, be geopolymer/emulsified bitumen matrix material.
Through measuring, the ultimate compression strength of this matrix material reaches 75.9 MPa, and compressive modulus of elasticity is 516.8 MPa, and folding strength is 9.5 MPa, and bending elastic modulus is 1.1 GPa.
Embodiment 3:
A kind of geopolymer/emulsified bitumen matrix material, it is mainly made up of the component of following parts by weight: 75 parts of geopolymer slurries and 25 parts of emulsified bitumens; And geopolymer is mainly made up of the component of following parts by weight: 50 parts of alkali stimulating activity materials and 50 parts of moduluses are 1.0 modified water glass.It is the industrial emulsion pitch of 55 % that emulsified bitumen adopts solid content.Described alkali stimulating activity material be 400 order flyash with 400 order slags in mass ratio 1:1 mix.
The preparation method of above-mentioned geopolymer/emulsified bitumen matrix material, the processing step of the method is:
(1) preparation of modified water glass solution: add NaOH to mix in industrial potash water glass solution, make modulus and be 1.0 modified water glass solution;
(2) preparation of geopolymer slurry: meter by weight, choose the water glass mix and blend 20 minutes that 50 ㎏ alkali stimulating activity materials and 50 ㎏ moduluses are 1.0, acquisition geopolymer slip;
(3) preparation of geopolymer/emulsified bitumen matrix material: meter by weight, getting 25 ㎏ emulsification part pitches joins in 75 ㎏ geopolymer slips in step (2), high-speed stirring 4 minutes, after mixing and stirring, suppress in mould, maintenance 1 day, and to keep curing temperature be 40 DEG C; After the demoulding, be geopolymer/emulsified bitumen matrix material.
Through measuring, the ultimate compression strength of this matrix material reaches 44.3 MPa, and compressive modulus of elasticity is 453.7 MPa, and folding strength is 15.2 MPa, and bending elastic modulus is 2.9 GPa.
Embodiment 4:
A kind of geopolymer/emulsified bitumen matrix material, it is mainly made up of the component of following parts by weight: 95 parts of geopolymer slurries and 5 parts of emulsified bitumens; Geopolymer is mainly made up of the component of following parts by weight: 60 parts of alkali stimulating activity materials and 50 parts of moduluses are 1.4 modified water glass.It is the industrial emulsion pitch of 65 % that emulsified bitumen adopts solid content.Described alkali stimulating activity material be 800 DEG C of calcining 2h of 400 order flyash and 400 order metakaolin in mass ratio 1:1 mix.
The preparation method of above-mentioned geopolymer/emulsified bitumen matrix material, the processing step of the method is:
(1) preparation of modified water glass solution: add NaOH to mix in industrial potash water glass solution, make modulus and be 1.4 modified water glass solution;
(2) preparation of geopolymer slurry: meter by weight, choose the water glass mix and blend 17 minutes that 60 ㎏ alkali stimulating activity materials and 50 ㎏ moduluses are 1.4, acquisition geopolymer slip;
(3) preparation of geopolymer/emulsified bitumen matrix material: meter by weight, getting 5 ㎏ emulsification part pitches joins in 95 ㎏ geopolymer slips in step (2), high-speed stirring 5 minutes, after mixing and stirring, suppress in mould, maintenance 2 days, and to keep curing temperature be 60 DEG C; After the demoulding, be geopolymer/emulsified bitumen matrix material;
Through measuring, the ultimate compression strength of this matrix material reaches 32.6 MPa, and compressive modulus of elasticity is 546.6 MPa, and folding strength is 10.2 MPa, and bending elastic modulus is 2.2 GPa.
Embodiment 5:
A kind of geopolymer/emulsified bitumen matrix material, it is mainly made up of the component of following parts by weight: 75 parts of geopolymers and 5 parts of emulsified bitumens; And geopolymer is mainly made up of the component of following parts by weight: 50 parts of alkali stimulating activity materials and 60 parts of moduluses are 1.6 modified water glass.It is the industrial emulsion pitch of 60 % that emulsified bitumen adopts solid content.Alkali stimulating activity material is the mixture that slag and flyash arbitrary proportion mix.Described slag adopts by hardening granulated blast-furnace slag through grinding to 100~1000 object powder; Described flyash is that 400~1000 orders, quality reach powder more than secondary.
The preparation method of above-mentioned geopolymer/emulsified bitumen matrix material, the processing step of the method is:
(1) preparation of modified water glass solution: add NaOH to mix in industrial sodium silicate solution, make modulus and be 1.6 modified water glass solution;
(2) preparation of geopolymer slurry: meter by weight, choose the water glass mix and blend 30 minutes that 50 ㎏ alkali stimulating activity materials and 60 ㎏ moduluses are 1.2, acquisition geopolymer slip;
(3) preparation of geopolymer/emulsified bitumen matrix material: meter by weight, 5 ㎏ emulsified bitumens add in 75 ㎏ geopolymer slips, and high-speed stirring 3 minutes, is cast in after mixing and stirring in mould, maintenance 3 days, and to keep curing temperature be 50 DEG C; After the demoulding, be geopolymer/emulsified bitumen matrix material.
Through measuring, the ultimate compression strength of this matrix material reaches 60.7 MPa, and compressive modulus of elasticity is 300.1 MPa, and folding strength is 13.8 MPa, and bending elastic modulus is 0.7 GPa.
Embodiment 6:
A kind of geopolymer/emulsified bitumen matrix material, it is mainly made up of the component of following parts by weight: 95 parts of geopolymer slurries and 25 parts of emulsified bitumens; Geopolymer is mainly made up of the component of following parts by weight: 60 parts of alkali stimulating activity materials and 60 parts of moduluses are 1.8 modified water glass.It is the industrial emulsion pitch of 67 % that emulsified bitumen adopts solid content.Described alkali stimulating activity material be 800 DEG C of calcining 2h of 400 order flyash and 400 order metakaolin in mass ratio 1:1 mix.
The preparation method of above-mentioned geopolymer/emulsified bitumen matrix material, the processing step of the method is:
(1) preparation of modified water glass solution: add NaOH to mix in industrial potash water glass solution, make modulus and be 1.8 modified water glass solution;
(2) preparation of geopolymer slurry: meter by weight, choose the water glass mix and blend 25 minutes that 60 ㎏ alkali stimulating activity materials and 60 ㎏ moduluses are 1.8, acquisition geopolymer slip;
(3) preparation of geopolymer/emulsified bitumen matrix material: meter by weight, getting 25 ㎏ emulsification part pitches joins in 95 ㎏ geopolymer slips in step (2), high-speed stirring 5 minutes, after mixing and stirring, suppress in mould, maintenance 4 days, and to keep curing temperature be 70 DEG C; After the demoulding, be geopolymer/emulsified bitumen matrix material;
Through measuring, the ultimate compression strength of this matrix material reaches 33.6 MPa, and compressive modulus of elasticity is 556.6 MPa, and folding strength is 10.2 MPa, and bending elastic modulus is 3.2 GPa.
Embodiment 7:
A kind of geopolymer/emulsified bitumen matrix material, it is mainly made up of the component of following parts by weight: 85 parts of geopolymer slurries and 15 parts of emulsified bitumens; Geopolymer is mainly made up of the component of following parts by weight: 50 parts of alkali stimulating activity materials and 50 parts of moduluses are 1.4 modified water glass.It is the industrial emulsion pitch of 58 % that emulsified bitumen adopts solid content.The mixture that described alkali stimulating activity material is metakaolin, slag and flyash arbitrary proportion.Described metakaolin adopts and under the condition of 600~800 DEG C, calcines by the above kaolin of 200 order the powder obtaining after 1.5~2.5 h; Described slag adopts by hardening granulated blast-furnace slag through grinding to 100~1000 object powder; Described flyash is that 400~1000 orders, quality reach powder more than secondary.
The preparation method of above-mentioned geopolymer/emulsified bitumen matrix material, the processing step of the method is:
(1) preparation of modified water glass solution: add NaOH to mix in industrial sodium silicate solution, make modulus and be 1.4 modified water glass solution;
(2) preparation of geopolymer slurry: meter by weight, choose the water glass mix and blend 18 minutes that 50 ㎏ alkali stimulating activity materials and 50 ㎏ moduluses are 1.4, acquisition geopolymer slip;
(3) preparation of geopolymer/emulsified bitumen matrix material: meter by weight, getting 15 ㎏ emulsification part pitches joins in 85 ㎏ geopolymer slips in step (2), high-speed stirring 4 minutes, after mixing and stirring, suppress in mould, maintenance 5 days, and to keep curing temperature be 65 DEG C; After the demoulding, be geopolymer/emulsified bitumen matrix material;
Through measuring, the ultimate compression strength of this matrix material reaches 76.9 MPa, and compressive modulus of elasticity is 526.8 MPa, and folding strength is 10.5 MPa, and bending elastic modulus is 1.5 GPa.

Claims (7)

1. geopolymer/emulsified bitumen matrix material, is characterized in that: it is mainly made up of the component of following parts by weight: 75~95 parts of geopolymer slurries and 5~25 parts of emulsified bitumens; Described geopolymer slurry is mainly made up of the component of following parts by weight: 50~60 parts of alkali stimulating activity materials and 50~60 parts of modified water glass.
2. geopolymer/emulsified bitumen matrix material according to claim 1, is characterized in that: described geopolymer/emulsified bitumen matrix material is mainly made up of the component of following parts by weight: 75 parts of geopolymer slurries and 25 parts of emulsified bitumens; Described geopolymer slurry is formed for 1:1 is mixed with in mass ratio by alkali stimulating activity material and modified water glass.
3. according to the arbitrary described geopolymer/emulsified bitumen matrix material of claim 1 or 2, it is characterized in that: described alkali stimulating activity material is one or more the mixture being selected from metakaolin, slag and flyash.
4. geopolymer/emulsified bitumen matrix material according to claim 3, is characterized in that: it is the industrial emulsion pitch of 50~70 % that described emulsified bitumen adopts solid content.
5. according to claim 1,2 or 4 arbitrary described geopolymer/emulsified bitumen matrix materials, is characterized in that: described modified water glass is that to be hybridly prepared into modulus be 1.0~2.0 modified water glass solution for industrial sodium silicate solution or industrial potash water glass solution and NaOH.
6. geopolymer/emulsified bitumen matrix material according to claim 3, is characterized in that: described metakaolin adopts and under the condition of 600~800 DEG C, calcines by the above kaolin of 200 order the powder obtaining after 1.5~2.5 h; Described slag adopts by hardening granulated blast-furnace slag through grinding to 200~1000 object powder; Described flyash is that 400~1000 orders, quality reach powder more than secondary.
7. prepare as arbitrary in claim 1-6 as described in the method for geopolymer/emulsified bitumen matrix material, it is characterized in that, the method comprises following processing step:
(1) preparation of modified water glass solution: add NaOH to mix in industrial sodium silicate solution or industrial potash water glass solution, make modulus and be 1.0~2.0 modified water glass solution;
(2) preparation of geopolymer slurry: choose alkali stimulating activity material, be placed in high speed dispersor, the modified water glass that then adds the step (1) of corresponding parts by weight to prepare, stirs, obtains geopolymer slip;
(3) preparation of geopolymer/emulsified bitumen matrix material: the emulsified bitumen of getting corresponding parts by weight joins in the geopolymer slip in step (2), high-speed stirring 3~5 minutes, after mixing and stirring, pour into a mould or suppress in mould, maintenance 0.5~7 day, and to keep curing temperature be 20~90 DEG C; After the demoulding, be geopolymer/emulsified bitumen matrix material.
CN201310143484.0A 2013-04-24 2013-04-24 Geopolymer/emulsified asphalt composite material and preparation method thereof Active CN103232182B (en)

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