CN115108762A - Coal ash-based geopolymer material for pouring porous asphalt mixture and preparation method thereof - Google Patents
Coal ash-based geopolymer material for pouring porous asphalt mixture and preparation method thereof Download PDFInfo
- Publication number
- CN115108762A CN115108762A CN202210524187.XA CN202210524187A CN115108762A CN 115108762 A CN115108762 A CN 115108762A CN 202210524187 A CN202210524187 A CN 202210524187A CN 115108762 A CN115108762 A CN 115108762A
- Authority
- CN
- China
- Prior art keywords
- fly ash
- asphalt mixture
- porous asphalt
- geopolymer material
- based geopolymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 63
- 239000000203 mixture Substances 0.000 title claims abstract description 59
- 239000000463 material Substances 0.000 title claims abstract description 52
- 229920000876 geopolymer Polymers 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000010883 coal ash Substances 0.000 title description 4
- 239000010881 fly ash Substances 0.000 claims abstract description 64
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 36
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000007822 coupling agent Substances 0.000 claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 16
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 14
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 14
- 239000004576 sand Substances 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims description 15
- 239000002893 slag Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 230000008961 swelling Effects 0.000 claims description 6
- 102100038694 DNA-binding protein SMUBP-2 Human genes 0.000 claims description 4
- 101000665135 Homo sapiens DNA-binding protein SMUBP-2 Proteins 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 238000009775 high-speed stirring Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 claims description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 2
- 239000006004 Quartz sand Substances 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 2
- 229940044172 calcium formate Drugs 0.000 claims description 2
- 235000019255 calcium formate Nutrition 0.000 claims description 2
- 239000004281 calcium formate Substances 0.000 claims description 2
- 239000004202 carbamide Substances 0.000 claims description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 8
- 239000007924 injection Substances 0.000 claims 8
- 238000010276 construction Methods 0.000 abstract description 10
- 239000002910 solid waste Substances 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004566 building material Substances 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 54
- 239000011159 matrix material Substances 0.000 description 11
- 239000002002 slurry Substances 0.000 description 11
- 239000004570 mortar (masonry) Substances 0.000 description 8
- 229920000642 polymer Polymers 0.000 description 7
- 238000007654 immersion Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000012190 activator Substances 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000012669 compression test Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229920000592 inorganic polymer Polymers 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- 238000007573 shrinkage measurement Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229920005601 base polymer Polymers 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000000404 calcium aluminium silicate Substances 0.000 description 1
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 1
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 description 1
- 229940078583 calcium aluminosilicate Drugs 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 125000005371 silicon functional group Chemical group 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/006—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mineral polymers, e.g. geopolymers of the Davidovits type
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of road building materials, in particular to a fly ash-based geopolymer material for pouring a porous asphalt mixture and a preparation method thereof. The fly ash-based geopolymer material for pouring the porous asphalt mixture comprises the following components in percentage by mass: 16-28% of solid sodium silicate, 1-5% of sodium hydroxide, 44-52% of fly ash, 10-22% of standard sand, 0.1-4% of expanding agent, 0.1-2% of coupling agent and 0.1-2% of early strength agent. The advantages are that: the porous asphalt mixture is poured by utilizing the fly ash waste material, so that the energy is saved, the environment is protected, the carbon emission is reduced, and the recycling of solid waste is realized; the mixed water can be directly used, is convenient to store and transport, has good fluidity and permeability after being mixed with water on site, can quickly form strength, and reduces the construction time and the construction cost; the mixture can effectively give consideration to high-temperature performance, has strong water stability, has the advantages of durability and the like, and is suitable for popularization and application.
Description
Technical Field
The invention relates to the technical field of road building materials, in particular to a fly ash-based geopolymer material for pouring a porous asphalt mixture and a preparation method thereof.
Background
Fly ash is used as a light and porous granular material, is a multiphase substance with similar appearance and fine granules, and is solid waste generated by insufficient combustion of coal in the processes of thermal power generation and urban heating. The fly ash used as a road engineering construction building material has very typical advantages, and effectively avoids the problems of land resource occupation, environmental pollution and the like of the fly ash from the aspect of environmental protection; in terms of engineering properties, the geopolymer grouting material can effectively ensure engineering quality and effectively reduce construction cost, but the traditional geopolymer grouting material needs to prepare an alkali activator in advance and then stir the alkali activator and a cementing material for use, so that the preparation process is complicated, the maintenance time is long, and the geopolymer grouting material is not beneficial to the application of actual construction engineering.
Disclosure of Invention
The invention aims to solve the technical problem of providing a fly ash-based geopolymer material for pouring a porous asphalt mixture and a preparation method thereof, and effectively overcomes the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
a fly ash based geopolymer material for pouring a porous asphalt mixture is prepared from the following raw materials in percentage by mass: 16-28% of solid sodium silicate, 1-5% of sodium hydroxide, 44-52% of fly ash, 10-22% of standard sand, 0.1-4% of expanding agent, 0.1-2% of coupling agent and 0.1-2% of early strength agent.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the modulus of the solid sodium silicate is 2.0 and Na 2 O content of 25.0%, SiO 2 The content was 49.2%, the product was a white powder.
Further, the sodium hydroxide is granular or flaky white solid with the content of more than or equal to 96 percent.
Further, the fineness of the fly ash is 1000-2000 meshes.
Further, the standard sand is quartz sand with a particle size of 0.15mm or less.
Further, the swelling agent is at least one of UEA swelling agent, magnesium oxide and HCSA high-efficiency swelling agent.
Further, the coupling agent is at least one of a silane coupling agent, a chromium complex coupling agent and a titanate coupling agent.
Further, the early strength agent is at least one of nitrite, chromate, triethanolamine, calcium formate, urea and slag powder.
The beneficial effects are that: the porous asphalt mixture is poured by utilizing the fly ash waste material, so that the energy is saved, the environment is protected, the carbon emission is reduced, and the recycling of solid waste is realized; the mixed water can be directly used, is convenient to store and transport, has good fluidity and permeability after being mixed with water on site, can quickly form strength, and reduces the construction time and the construction cost; the mixture can effectively give consideration to high-temperature performance, has strong water stability, has the advantages of durability and the like, and is suitable for popularization and application.
Also provides a preparation method of the fly ash-based geopolymer material for pouring the porous asphalt mixture, which comprises the following steps:
step one, weighing solid sodium silicate, sodium hydroxide, fly ash, standard sand, an early strength agent and an expanding agent according to the formula ratio, and uniformly mixing and stirring;
and step two, adding water and a coupling agent into the mixture obtained in the step one to perform high-low speed alternate stirring, wherein the adding amount of the water is 22-27% of the total mass of the raw materials.
On the basis of the technical scheme, the invention can be improved as follows.
Further, in the low-speed and high-speed alternative stirring process, the alternative time interval is 3-5 min, the total stirring time is 10-20 min, wherein the low-speed stirring rotating speed is 1000-1500 rpm, and the high-speed stirring rotating speed is 1500-2500 rpm.
The beneficial effects are that: the preparation method is simple and efficient.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
Example 1
A fly ash-based geopolymer material for conveniently pouring a porous asphalt mixture comprises the following preparation raw materials in percentage by mass: 24.38% of solid sodium silicate, 3.36% of sodium hydroxide, 49.91% of fly ash, 18.08% of standard sand, 2.71% of expanding agent, 0.9% of coupling agent and 0.67% of early strength agent;
wherein the fly ash is I-grade fly ash, the fineness of the fly ash is not more than 18% (1000-2000 meshes), and the density of the fly ash is 2.589g/cm 3; the modulus of the solid sodium silicate is 2.0 and Na 2 O content of 25.0%, SiO 2 The content is 49.2 percent, and the character is white powder; the sodium hydroxide is white uniform flaky solid with the content of more than or equal to 96 percent; the coupling agent is a colorless transparent liquid with the model of KH-550 of silane coupling agent; the early strength agent adopts slag, and preferably slag powder with the model of S95 grade; the expanding agent adopts HCSA high-efficiency expanding agent, and the specific preparation method comprises the following steps:
firstly, preparing an OGFC-25 set required by the recommended range of the current highway asphalt pavement construction technical specification in China as a porous asphalt mixture matrix;
then weighing solid sodium silicate, sodium hydroxide, fly ash, standard sand, slag powder and an expanding agent according to the formula ratio, and uniformly mixing and stirring;
then, adding water and a coupling agent (silane coupling agent) into the mixture obtained in the step one to perform high-low speed alternate stirring, wherein the adding amount of the water is 25.34% of the total mass of the raw materials, the low-speed stirring rotating speed is 1000-1500 rpm, the high-speed stirring rotating speed is 1500-2500 rpm, and the high-low speed alternate stirring is performed for 15min in total, so as to obtain the slurry-filled fly ash-based polymer material;
then, tightly wrapping the obtained matrix asphalt mixture with a waterproof material with a smooth surface, reserving the surface, placing the matrix asphalt mixture on a cement vibration table, and mixing the matrix asphalt mixture with the grouting material 3: 1, filling the base polymer material (slurry) filled with the slurry fly ash, vibrating on a vibrating table for 1min, pouring while vibrating in the process until the slurry cannot completely permeate from the reserved surface, and scraping the redundant slurry on the surface by using a scraper to expose the surface of the matrix;
finally, maintaining the test piece; and placing the test piece filled with the slurry in a constant-temperature curing box with the temperature of 30 ℃ and the humidity of 90% for curing for 7 days for forming to obtain the semi-flexible asphalt mixture filled with the fly ash-based polymer.
The fly ash-based geopolymer material and the semi-flexible asphalt mixture obtained in the embodiment are tested, and the performances are as follows:
the performance of the fly ash-based geopolymer material is as follows:
mechanical properties
The fly ash based geopolymer material is formed in a mold (40mm multiplied by 160mm) with standard size, then is placed at the temperature of 30 ℃ and the humidity of more than 95 percent for respective solidification for 3 days, and is demoulded, then the flexural strength and the compressive strength of the fly ash based geopolymer material are tested, half of samples are adopted for the compression test of the sample for the compression strength measurement, and the results are shown in table 1.
Table 1 mechanical property data of geopolymer material obtained in example 1, as follows:
flow properties
And (3) measuring the fluidity of the geopolymer mortar by adopting an expansion method. The glass plate is placed in a horizontal position, before the test is started, the glass plate and a cement paste fluidity test mould (36mm multiplied by 60mm) are wiped and wetted by a wet towel, then the paste is poured into the test mould, the test mould is lifted to start timing, the diameter of the paste is measured by a ruler after 30s, the maximum diameter and the minimum diameter of the paste are measured, and the test result is the average value of the two. The fluidity results are shown in table 2.
Table 2 flow property data for the geopolymer material obtained in example 1, as follows:
| condition | Degree of fluidity |
| Initial fluidity | 268 |
| Fluidity at 30min | 251 |
Shrinkage property
The geopolymer mortar dry shrinkage measurement is carried out according to the requirements of 'building mortar basic performance test method standard' (JGJ/T70-2009), the demolded test piece is placed in a curing box with the temperature of 30 ℃ and the relative humidity of 65% for curing, and the dry shrinkage rate result after the test for 56 days by using a vertical mortar shrinker shows that the dry shrinkage value is 0.6%.
The pavement performance of the semi-flexible asphalt mixture is as follows:
high temperature performance
The high temperature stability of the semi-flexible asphalt mixture adopts a dynamic single-shaft test. A porous asphalt mixture matrix test piece is manufactured by adopting a rotary compactor (SGC), and is placed into a curing box (with the temperature of 30 ℃ and the humidity of more than 95%) for curing for 3d of age after a geopolymer material is poured. And then a UTM-100 universal tester is used for testing the high-temperature performance of the test piece which is insulated for more than 4 hours at the temperature of 60 ℃. Test results show that the high-temperature dynamic single-axis times of the semi-flexible asphalt mixture are 3760 times, the high-temperature dynamic single-axis times of the matrix asphalt mixture are 645 times, and the dynamic single-axis data of the semi-flexible asphalt mixture are far larger than those of asphalt materials.
Low temperature performance
Low-temperature crack resistance test: the matrix asphalt mixture is made into the size ofA cylindrical test piece with the diameter of 150mm and the height of 50mm is poured into fly ash based polymer slurry for curing and forming, the cylindrical test piece is half-cut along the radius to form a semicircular test piece, a slit with the thickness of 5mm is formed in the middle of the semicircular test piece, an SCB test is carried out at the temperature of-10 ℃, and test results show that the fracture energy of the semi-flexible asphalt pavement material obtained in the embodiment is 865.6J/m 2 。
Freezing and thawing cleavage test
The freeze-thaw splitting test is adopted to test the water stability of the semi-flexible asphalt pavement material obtained in the embodiment, and the result shows that the freeze-thaw splitting ratio of the semi-flexible asphalt mixture filled with the fly ash-based polymer is 79.5%, which is more than 75% of the standard requirement.
Table 3 freeze-thaw splitting test data of the semi-flexible asphalt mixture obtained in example 1 are as follows:
immersion marshall test
The water stability of the semi-flexible asphalt pavement material obtained in the embodiment is tested by a water immersion marshall test, and the result shows that the water immersion residual stability of the semi-flexible asphalt mixture filled with the fly ash-based polymer is 95.8 percent and far exceeds 80 percent of the standard requirement.
Table 4 marshall test data for the semi-flexible asphalt mix obtained in example 1, as follows:
example 2
A fly ash based geopolymer material for pouring a porous asphalt mixture comprises the following components in percentage by mass: 24.88% of solid sodium silicate, 3.43% of sodium hydroxide, 48.2% of fly ash, 18.45% of standard sand, 2.76% of expanding agent, 0.92% of coupling agent and 1.37% of early strength agent;
wherein the fly ash is I-grade fly ash, the fineness of the fly ash is not more than 18% (1000-2000 meshes), and the density of the fly ash is 2.589g/cm 3; the modulus of the solid sodium silicate is 2.0 and Na 2 O content of 25.0%, SiO 2 The content is 49.2 percent, and the character is white powder; the sodium hydroxide is white uniform flaky solid with the content of more than or equal to 96 percent; the coupling agent is a colorless transparent liquid with the model of KH-550 of silane coupling agent; the early strength agent adopts slag, and preferably slag powder with the model of S95 grade is selected; the expanding agent is HCSA high-efficiency expanding agent, the specific preparation method is about the same as that of the embodiment 1, and the amount of the water added in the step two and the water doping amount is 26.84 percent of the total mass of the raw materials.
The fly ash-based geopolymer material and the semi-flexible asphalt mixture obtained in the embodiment are tested, and the performances are as follows:
the performance of the fly ash-based geopolymer material is as follows:
mechanical properties
The fly ash based geopolymer material is formed in a mold (40mm multiplied by 160mm) with standard size, then is placed at the temperature of 30 ℃ and the humidity of more than 95 percent for respective solidification for 3 days, and is demoulded, then the flexural strength and the compressive strength of the fly ash based geopolymer material are tested, half of samples are adopted for the compression test of the sample for the compression strength measurement, and the results are shown in table 1.
Table 5 mechanical property data of geopolymer material obtained in example 2, as follows:
flow properties
And (3) measuring the fluidity of the geopolymer mortar by adopting an expansion method. The glass plate is placed in a horizontal position, before the test is started, the glass plate and a cement paste fluidity test mold (36mm multiplied by 60mm) are wiped and wetted by a wet towel, then the paste is poured into the test mold, the test mold is lifted for timing, the diameter of the paste is measured by a ruler after 30s, the maximum diameter and the minimum diameter of the paste are measured, and the average value of the test result and the minimum diameter is taken. The fluidity results are shown in table 2.
Table 6 flow property data for the geopolymer material obtained in example 2, as follows:
| condition | Degree of fluidity |
| Initial fluidity | 273 |
| Fluidity at 30min | 258 |
Shrinkage property
According to the requirements of 'basic performance test method standards of building mortar' (JGJ/T70-2009) for geopolymer mortar dry shrinkage measurement, a demolded test piece is placed in a curing box with the temperature of 30 ℃ and the relative humidity of 65% for curing, and a dry shrinkage result after a vertical mortar shrinkage instrument is used for testing for 56 days shows that the dry shrinkage value is 0.62%.
The pavement performance of the semi-flexible asphalt mixture is as follows:
high temperature performance
The high temperature stability of the semi-flexible asphalt mixture adopts a dynamic single-shaft test. A porous asphalt mixture matrix test piece is manufactured by adopting a rotary compactor (SGC), and is placed into a curing box (with the temperature of 30 ℃ and the humidity of more than 95%) for curing for 3d of age after a geopolymer material is poured. And then a UTM-100 universal tester is used for testing the high-temperature performance of the test piece which is insulated for more than 4 hours at the temperature of 60 ℃. The test result shows that the high-temperature dynamic single-axis times of the semi-flexible asphalt mixture are 3960 times, the high-temperature dynamic single-axis times of the matrix asphalt mixture are 645 times, and the dynamic single-axis data of the semi-flexible asphalt mixture is far larger than that of asphalt materials.
Low temperature performance
Low temperature crack resistance test: the method comprises the steps of manufacturing a base asphalt mixture into a cylindrical test piece with the size of 150mm in diameter and 50mm in height, pouring fly ash-based polymer slurry for curing and forming, half-cutting the cylindrical test piece along the radius to form a semicircular test piece, cutting a slit with the thickness of 5mm in the middle of the semicircular test piece, and performing an SCB test at the temperature of-10 ℃, wherein test results show that the fracture energy of the semi-flexible asphalt pavement material obtained in the embodiment is 964.8J/m 2 。
Freezing and thawing cleavage test
The freeze-thaw splitting test is adopted to test the water stability of the semi-flexible asphalt pavement material obtained in the embodiment, and the result shows that the freeze-thaw splitting ratio of the semi-flexible asphalt mixture filled with the fly ash-based polymer is 80.4% and is more than 75% of the standard requirement.
Table 7 freeze-thaw splitting test data of the semi-flexible asphalt mixture obtained in example 2 are as follows:
immersion marshall test
The water stability of the semi-flexible asphalt pavement material obtained in the embodiment is tested by a water immersion marshall test, and the result shows that the water immersion residual stability of the semi-flexible asphalt mixture filled with the fly ash-based polymer is 97.6%, which far exceeds 80% of the standard requirement.
Table 8 marshall test data for the semi-flexible asphalt mix obtained in example 2, as follows:
specifically, the principle of the present invention is as follows:
the sodium silicate can dissolve silicon and aluminum in the fly ash after being added with water, then the silicon and aluminum gel is formed by polymerization, and then the silicon and aluminum gel is condensed into inorganic polymers such as calcium aluminosilicate and the like, and the inorganic polymers are solidified to generate strength; after active substances in the slag and the fly ash are dissolved out, products of sodium silicate and water are solidified, fly ash and slag particles are wrapped in the fly ash and the slag particles to form a frozen body, the powder particles are tightly bonded with the surrounding frozen body, the structures of the fly ash and the slag particles in the alkali-activated slurry are complete, and the phenomenon of disintegration of the fly ash and the slag particles like portland cement particles is avoided; the introduction of the silane coupling agent can greatly improve the adhesion and strength of the matrix and the grouting material; meanwhile, the hydrolysis of silicon functional groups in the silane coupling agent requires the participation of water, so that the bleeding rate of the slurry is reduced, and the shrinkage of the slurry is reduced.
Compared with the prior art, the invention has the beneficial effects that:
(1) the coal ash based geopolymer material for filling the porous asphalt mixture is developed, the coal ash waste material is used for filling the porous asphalt mixture, the energy is saved, the environment is protected, the carbon emission is reduced, and the recycling of solid waste is realized.
(2) The mixed water can be directly used, is convenient for storage and transportation, has good fluidity and permeability after being mixed with water on site, can quickly form strength, and reduces the construction time and the construction cost.
(3) After the porous asphalt mixture is poured into the geopolymer material, the high-temperature performance and the high water stability can be effectively considered, and the geopolymer material has the advantages of durability and the like and is suitable for popularization and application.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The fly ash-based geopolymer material for pouring the porous asphalt mixture is characterized by comprising the following preparation raw materials in percentage by mass: 16-28% of solid sodium silicate, 1-5% of sodium hydroxide, 44-52% of fly ash, 10-22% of standard sand, 0.1-4% of expanding agent, 0.1-2% of coupling agent and 0.1-2% of early strength agent.
2. The fly ash-based geopolymer material for porous asphalt mixture injection as claimed in claim 1, wherein: the modulus of the solid sodium silicate is 2.0 and Na 2 O content of 25.0%, SiO 2 The content was 49.2%, and the product was white powder.
3. The fly ash-based geopolymer material for porous asphalt mixture injection as claimed in claim 1, wherein: the sodium hydroxide is granular or flaky white solid with the content of more than or equal to 96 percent.
4. The fly ash-based geopolymer material for porous asphalt mixture injection as claimed in claim 1, wherein: the fineness of the fly ash is 1000-2000 meshes.
5. The fly ash-based geopolymer material for porous asphalt mixture injection according to claim 1, which is characterized in that: the standard sand is quartz sand with the particle size of less than 0.15 mm.
6. The fly ash-based geopolymer material for porous asphalt mixture injection as claimed in claim 1, wherein: the swelling agent is at least one of UEA swelling agent, magnesium oxide and HCSA high-efficiency swelling agent.
7. The fly ash-based geopolymer material for porous asphalt mixture injection as claimed in claim 1, wherein: the coupling agent is at least one of silane coupling agent, chromium complex coupling agent and titanate coupling agent.
8. The fly ash-based geopolymer material for porous asphalt mixture injection as claimed in claim 1, wherein: the early strength agent is at least one of nitrite, chromate, triethanolamine, calcium formate, urea and slag powder.
9. A preparation method of a fly ash based geopolymer material for pouring a porous asphalt mixture is characterized by comprising the following steps:
step one, weighing solid sodium silicate, sodium hydroxide, fly ash, standard sand, an early strength agent and an expanding agent according to the formula ratio, and uniformly mixing and stirring;
and step two, adding water and a coupling agent into the mixture obtained in the step one to perform high-low speed alternate stirring, wherein the adding amount of the water is 22-27% of the total mass of the raw materials.
10. The method for preparing the fly ash-based geopolymer material for porous asphalt mixture injection according to claim 9, which is characterized in that: in the low-speed and high-speed alternative stirring process, the alternative time interval is 3-5 min, the total stirring time is 10-20 min, wherein the low-speed stirring rotating speed is 1000-1500 rpm, and the high-speed stirring rotating speed is 1500-2500 rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210524187.XA CN115108762A (en) | 2022-05-13 | 2022-05-13 | Coal ash-based geopolymer material for pouring porous asphalt mixture and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210524187.XA CN115108762A (en) | 2022-05-13 | 2022-05-13 | Coal ash-based geopolymer material for pouring porous asphalt mixture and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115108762A true CN115108762A (en) | 2022-09-27 |
Family
ID=83326015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210524187.XA Pending CN115108762A (en) | 2022-05-13 | 2022-05-13 | Coal ash-based geopolymer material for pouring porous asphalt mixture and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115108762A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2802651C1 (en) * | 2023-04-05 | 2023-08-30 | федеральное государственное бюджетное образовательное учреждение высшего образования "Южно-Российский государственный политехнический университет (НПИ) имени М.И. Платова" | Raw mix based on ash and slag waste for obtaining geopolymer material with low density |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3615780A (en) * | 1969-05-28 | 1971-10-26 | Itt Rayonier Inc | Silicate-catalyzed chemical grouting compositions |
| US4696698A (en) * | 1985-10-15 | 1987-09-29 | American Colloid Company | Flexible grout composition and method |
| CN103880377A (en) * | 2014-02-20 | 2014-06-25 | 广西交通科学研究院 | Geopolymer grouting material and preparation method thereof |
| CN108675699A (en) * | 2018-06-11 | 2018-10-19 | 浙江大学 | A kind of corrosion-resistant geopolymer filling concrete pile material and preparation method thereof and construction technology |
| CN109133772A (en) * | 2018-08-07 | 2019-01-04 | 华北水利水电大学 | Cold-mix semi-flexible composite pavement material and preparation method thereof |
| KR102027859B1 (en) * | 2019-05-09 | 2019-10-02 | 홍경자 | High Strength Filler Composition For Asphalt Concrete Using Slaked Lime |
| CN113698143A (en) * | 2021-09-26 | 2021-11-26 | 武汉工程大学 | Semi-flexible asphalt mixture filled with metakaolin-based polymer and preparation method thereof |
-
2022
- 2022-05-13 CN CN202210524187.XA patent/CN115108762A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3615780A (en) * | 1969-05-28 | 1971-10-26 | Itt Rayonier Inc | Silicate-catalyzed chemical grouting compositions |
| US4696698A (en) * | 1985-10-15 | 1987-09-29 | American Colloid Company | Flexible grout composition and method |
| CN103880377A (en) * | 2014-02-20 | 2014-06-25 | 广西交通科学研究院 | Geopolymer grouting material and preparation method thereof |
| CN108675699A (en) * | 2018-06-11 | 2018-10-19 | 浙江大学 | A kind of corrosion-resistant geopolymer filling concrete pile material and preparation method thereof and construction technology |
| CN109133772A (en) * | 2018-08-07 | 2019-01-04 | 华北水利水电大学 | Cold-mix semi-flexible composite pavement material and preparation method thereof |
| KR102027859B1 (en) * | 2019-05-09 | 2019-10-02 | 홍경자 | High Strength Filler Composition For Asphalt Concrete Using Slaked Lime |
| CN113698143A (en) * | 2021-09-26 | 2021-11-26 | 武汉工程大学 | Semi-flexible asphalt mixture filled with metakaolin-based polymer and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 张金安等: "《粉煤灰与废旧塑料的综合利用》", vol. 1, 中国建筑工业出版社, pages: 222 - 223 * |
| 郑金华: ""路用地聚合物制备与灌浆材料性能研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》, 15 March 2020 (2020-03-15), pages 17 - 18 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2802651C1 (en) * | 2023-04-05 | 2023-08-30 | федеральное государственное бюджетное образовательное учреждение высшего образования "Южно-Российский государственный политехнический университет (НПИ) имени М.И. Платова" | Raw mix based on ash and slag waste for obtaining geopolymer material with low density |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Patel et al. | Enhancement of the properties of ground granulated blast furnace slag based self compacting geopolymer concrete by incorporating rice husk ash | |
| CN102010166B (en) | Method for preparing micro expanded inorganic heat insulation mortar | |
| Živica et al. | Properties of metakaolin geopolymer hardened paste prepared by high-pressure compaction | |
| Guo et al. | Cleaner one-part geopolymer prepared by introducing fly ash sinking spherical beads: properties and geopolymerization mechanism | |
| Jones et al. | Moving fly ash utilisation in concrete forward: A UK perspective | |
| Jiang et al. | Effect of thermal insulation components on physical and mechanical properties of plant fibre composite thermal insulation mortar | |
| CN114591049B (en) | Method for preparing green mortar by using construction waste | |
| CN111499238A (en) | Preparation method of zeolite geopolymer cementing material | |
| CN108328977B (en) | Concrete repairing material | |
| CN114044664B (en) | Anti-freezing and salt-freezing-resistant rapid repairing material for cement pavement of airport and preparation method thereof | |
| CN113652239B (en) | Special curing agent for tropical desert soil and use method thereof | |
| CN114956681A (en) | High-temperature cured low-carbon high-strength geopolymer concrete material and preparation method thereof | |
| CN113698143A (en) | Semi-flexible asphalt mixture filled with metakaolin-based polymer and preparation method thereof | |
| CN114573306A (en) | High-strength rapid-setting concrete repairing material and preparation method and application thereof | |
| CN112551953A (en) | Fly ash-based polymer mortar repair material and preparation method thereof | |
| CN101786808A (en) | Preparation method of geopolymer | |
| CN106866177B (en) | Fiber foam concrete and preparation method thereof | |
| CN111072339B (en) | Silt composite curing agent and silt curing method | |
| CN117185725A (en) | Water-stable material based on fly ash and preparation method thereof | |
| CN115108762A (en) | Coal ash-based geopolymer material for pouring porous asphalt mixture and preparation method thereof | |
| CN115215606A (en) | Mortar suitable for negative temperature environment and preparation method thereof | |
| CN114014624A (en) | Method for proportioning gypsum-based self-leveling mortar special for ground heating backfill | |
| CN115057660A (en) | Water-blended quick-hardening metakaolin-based geopolymer material for pouring porous asphalt mixture and preparation method thereof | |
| CN112552012A (en) | High-temperature anhydrous gypsum pavement brick, curb and preparation method thereof | |
| CN113248202A (en) | Cement-based recycled concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220927 |