CN112279557A - Special flame-retardant asphalt for tunnel and preparation method thereof - Google Patents
Special flame-retardant asphalt for tunnel and preparation method thereof Download PDFInfo
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- CN112279557A CN112279557A CN202010959378.XA CN202010959378A CN112279557A CN 112279557 A CN112279557 A CN 112279557A CN 202010959378 A CN202010959378 A CN 202010959378A CN 112279557 A CN112279557 A CN 112279557A
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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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of flame-retardant asphalt production, and discloses flame-retardant asphalt special for tunnels and a preparation method thereof, wherein the flame-retardant asphalt comprises the following components in parts by weight: 30-45 parts of asphalt, 20-30 parts of coarse and fine aggregates, 5-15 parts of flame retardant modifier, 10-20 parts of mineral powder, 10-15 parts of waste residue powder, 2-5 parts of stabilizer, 2-8 parts of hydrotalcite and 1-3 parts of dispersant. The invention adopts FRMAXTMThe flame-retardant modifier is used for modifying asphalt, so that the flame-retardant modifier has good dispersibility, high safety and environmental protection performance and small pollution to the working environment in asphalt mixing, the problem of precipitation of a flame retardant in the asphalt and the influence on the performance index of the asphalt are fundamentally solved, and the flame-retardant asphalt disclosed by the invention has the advantages of strong flame retardance, good smoke suppression performance, low temperature resistance and durability, and solves the problem of long-time use processIn the middle, the asphalt pavement is cracked or weathered and cracked.
Description
Technical Field
The invention relates to the technical field of production of flame-retardant asphalt, in particular to flame-retardant asphalt special for a tunnel and a preparation method thereof.
Background
With the continuous development of coal mine road engineering construction in China, the concrete pavement, the main material of the original road pavement, is widely applied to roadway engineering with poor balancing performance, high maintenance difficulty and closed internal space, and simultaneously, the roadway concrete flame-retardant asphalt pavement is relatively difficult to realize due to the narrow, moist and closed roadway space and serious noise pollution, so that the continuous problems of roadway maintenance, driving safety, balancing performance, noise pollution and the like are solved.
However, the research and development ideas of the tunnel flame-retardant asphalt adopted in China are basically the same, multiple flame retardants are used for synergistic flame retardation, the flame retardants are added for multiple times, and the cut powder flame retardants are easy to scatter when added into the asphalt, so that the environmental pollution is caused, the performances of the asphalt and the asphalt mixture are also seriously influenced, and the performances of the asphalt are damaged, especially the ductility of the asphalt is damaged. Therefore, the technical personnel in the field provide a flame-retardant asphalt special for tunnels and a preparation method thereof, so as to solve the problems in the background technology.
Disclosure of Invention
The invention aims to provide flame-retardant asphalt special for tunnels and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the flame-retardant asphalt special for the tunnel comprises the following components in parts by weight: 30-45 parts of asphalt, 20-30 parts of coarse and fine aggregates, 5-15 parts of flame retardant modifier, 10-20 parts of mineral powder, 10-15 parts of waste residue powder, 2-5 parts of stabilizer, 2-8 parts of hydrotalcite and 1-3 parts of dispersant.
As a further scheme of the invention: the mineral powder comprises the following components in parts by weight: 15-30 parts of zeolite, 4-8 parts of tourmaline, 3-5 parts of medical stone, 1-5 parts of sepiolite, 2-6 parts of expanded vermiculite and 3-5 parts of expanded perlite.
As a still further scheme of the invention: the preparation method of the mineral powder comprises the following steps:
A. washing and drying zeolite, tourmaline, medical stone, sepiolite, expanded vermiculite and expanded perlite, respectively putting the dried zeolite, tourmaline, medical stone, sepiolite, expanded vermiculite and expanded perlite into a ball mill for ball milling into powder, and sieving the powder with a 100-plus-200-mesh sieve to obtain powder minerals;
B. and putting the powder of the components into a stirring tank, and uniformly stirring for 20-30min to obtain the required mineral powder.
As a still further scheme of the invention: the waste slag powder comprises waste iron slag powder and waste steel slag powder, and the ratio of the waste iron slag powder to the waste steel slag powder is 2: 1.
As a still further scheme of the invention: the dispersing agent is formed by mixing sodium tripolyphosphate and sodium hexametaphosphate according to the weight ratio of 1: 3.
As a still further scheme of the invention: the stabilizer is sodium silicate, and the flame-retardant modifier is FRMAXTMA series of flame retardant modifiers.
As a still further scheme of the invention: the coarse and fine aggregates comprise coarse materials and fine materials, the coarse materials are preferably artificial aggregates such as coal cinder, ceramsite, slag and the like, the particle size of the coarse materials is 4-5mm, the particle size of the fine materials is less than 4mm, and natural sand is preferably selected.
As a still further scheme of the invention: the preparation method of the flame-retardant asphalt comprises the following steps:
s1, putting the coarse and fine aggregates into drying equipment according to a certain proportion, and drying at the temperature of 180-;
s2, adding a certain amount of flame retardant modifier and the treated coarse and fine aggregates into a stirring tank, uniformly stirring for 2min, adding a certain amount of asphalt heated to 160-170 ℃ into the stirring tank, continuously stirring for 2min, and uniformly stirring;
and S3, adding the mineral powder, the waste residue powder and the hydrotalcite into the stirring tank for uniform mixing, simultaneously adding the dispersing agent and the stabilizing agent in sequence, and continuously stirring for 15-20min until the mixture is uniformly stirred to obtain the flame-retardant asphalt.
Compared with the prior art, the invention has the beneficial effects that: the invention designs a tunnel special flame-retardant asphalt and a preparation method thereof, and during actual operation, FRMAX is adoptedTMThe flame-retardant modifier is used for modifying the asphalt, so that the flame-retardant modifier has good dispersibility, high safety and environmental protection performance in asphalt mixing, small pollution to the working environment, low corrosion to equipment and FRMAXTMThe flame retardant modifier is easy to add, does not generate the problem of precipitation in the asphalt and simultaneously does not have the performance on the asphaltIndexes cause influence, so that the flame-retardant asphalt designed by the invention not only has high-efficiency flame-retardant performance, but also has good smoke suppression performance, and the application of the mineral powder and the waste residue powder can reduce the production cost of the asphalt, adsorb oil in the asphalt, and improve the low-temperature resistance and durability of the asphalt, thereby avoiding the phenomena of cracking or weathering and cracking of the asphalt pavement in the long-time use process.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiment of the invention, the preparation method of the flame-retardant asphalt special for the tunnel comprises the following steps:
s1, putting the coarse and fine aggregates into drying equipment according to a certain proportion, and drying at the temperature of 180-;
s2, adding a certain amount of flame retardant modifier and the treated coarse and fine aggregates into a stirring tank, uniformly stirring for 2min, adding a certain amount of asphalt heated to 160-170 ℃ into the stirring tank, continuously stirring for 2min, and uniformly stirring;
s3, adding the mineral powder, the waste residue powder and the hydrotalcite into the stirring tank for uniform mixing, simultaneously adding the dispersant and the stabilizer in sequence, and continuing stirring for 15-20min until the mixture is uniformly stirred to obtain the flame-retardant asphalt;
further, the stabilizing agent is sodium silicate, the dispersing agent is sodium tripolyphosphate and sodium hexametaphosphate which are mixed according to the weight ratio of 1:3, and the flame retardant modifier is FRMAXTMA series of flame retardant modifiers;
furthermore, the coarse and fine aggregates comprise coarse materials and fine materials, the coarse materials are artificial aggregates such as coal slag, ceramsite, slag and the like, the particle size of the coarse materials is 4-5mm, the particle size of the fine materials is less than 4mm, and natural sand is preferred.
FRMAX of the inventionTMThe physicochemical indexes of the flame retardant modifier are shown in the following table:
| FRMAXTMflame retardant modifier | |
| Effective content of flame retardant (%) | 70％ |
| Melting temperature | ≥145℃ |
| Ignition point | ≥320℃ |
Example 1
The flame-retardant asphalt special for the tunnel comprises the following components in parts by weight: 30 parts of asphalt, 20 parts of coarse and fine aggregates, 5 parts of flame retardant modifier, 10 parts of mineral powder, 10 parts of waste residue powder, 2 parts of stabilizer, 2 parts of hydrotalcite and 1 part of dispersant;
wherein the mineral powder comprises the following components in parts by weight: 15 parts of zeolite, 4 parts of tourmaline, 3 parts of medical stone, 1 part of sepiolite, 2 parts of expanded vermiculite and 3 parts of expanded perlite;
the preparation method of the mineral powder comprises the following steps:
A. washing and drying zeolite, tourmaline, medical stone, sepiolite, expanded vermiculite and expanded perlite, respectively putting the dried zeolite, tourmaline, medical stone, sepiolite, expanded vermiculite and expanded perlite into a ball mill for ball milling into powder, and sieving the powder with a 100-plus-200-mesh sieve to obtain powder minerals;
B. then putting the powder of the components into a stirring tank, and uniformly stirring for 20-30min to obtain the required mineral powder;
further, the waste slag powder comprises waste iron slag powder and waste steel slag powder, and the ratio of the waste iron slag powder to the waste steel slag powder is 2: 1.
Example 2
The flame-retardant asphalt special for the tunnel comprises the following components in parts by weight: 45 parts of asphalt, 30 parts of coarse and fine aggregates, 15 parts of flame retardant modifier, 20 parts of mineral powder, 15 parts of waste residue powder, 5 parts of stabilizer, 8 parts of hydrotalcite and 3 parts of dispersant;
wherein the mineral powder comprises the following components in parts by weight: 30 parts of zeolite, 8 parts of tourmaline, 5 parts of medical stone, 5 parts of sepiolite, 6 parts of expanded vermiculite and 5 parts of expanded perlite;
the preparation method of the mineral powder comprises the following steps:
A. washing and drying zeolite, tourmaline, medical stone, sepiolite, expanded vermiculite and expanded perlite, respectively putting the dried zeolite, tourmaline, medical stone, sepiolite, expanded vermiculite and expanded perlite into a ball mill for ball milling into powder, and sieving the powder with a 100-plus-200-mesh sieve to obtain powder minerals;
B. then putting the powder of the components into a stirring tank, and uniformly stirring for 20-30min to obtain the required mineral powder;
further, the waste slag powder comprises waste iron slag powder and waste steel slag powder, and the ratio of the waste iron slag powder to the waste steel slag powder is 2: 1.
Example 3
The flame-retardant asphalt special for the tunnel comprises the following components in parts by weight: 36 parts of asphalt, 25 parts of coarse and fine aggregates, 10 parts of flame retardant modifier, 15 parts of mineral powder, 12 parts of waste residue powder, 3 parts of stabilizer, 5 parts of hydrotalcite and 2 parts of dispersant;
wherein the mineral powder comprises the following components in parts by weight: 20 parts of zeolite, 5 parts of tourmaline, 4 parts of medical stone, 3 parts of sepiolite, 5 parts of expanded vermiculite and 4 parts of expanded perlite;
the preparation method of the mineral powder comprises the following steps:
A. washing and drying zeolite, tourmaline, medical stone, sepiolite, expanded vermiculite and expanded perlite, respectively putting the dried zeolite, tourmaline, medical stone, sepiolite, expanded vermiculite and expanded perlite into a ball mill for ball milling into powder, and sieving the powder with a 100-plus-200-mesh sieve to obtain powder minerals;
B. then putting the powder of the components into a stirring tank, and uniformly stirring for 20-30min to obtain the required mineral powder;
further, the waste slag powder comprises waste iron slag powder and waste steel slag powder, and the ratio of the waste iron slag powder to the waste steel slag powder is 2: 1.
Example 4
The flame-retardant asphalt special for the tunnel comprises the following components in parts by weight: 40 parts of asphalt, 24 parts of coarse and fine aggregates, 14 parts of flame retardant modifier, 16 parts of mineral powder, 12 parts of waste residue powder, 3 parts of stabilizer, 4 parts of hydrotalcite and 2 parts of dispersant;
wherein the mineral powder comprises the following components in parts by weight: 25 parts of zeolite, 6 parts of tourmaline, 4 parts of medical stone, 2 parts of sepiolite, 5 parts of expanded vermiculite and 4 parts of expanded perlite;
the preparation method of the mineral powder comprises the following steps:
A. washing and drying zeolite, tourmaline, medical stone, sepiolite, expanded vermiculite and expanded perlite, respectively putting the dried zeolite, tourmaline, medical stone, sepiolite, expanded vermiculite and expanded perlite into a ball mill for ball milling into powder, and sieving the powder with a 100-plus-200-mesh sieve to obtain powder minerals;
B. then putting the powder of the components into a stirring tank, and uniformly stirring for 20-30min to obtain the required mineral powder;
further, the waste slag powder comprises waste iron slag powder and waste steel slag powder, and the ratio of the waste iron slag powder to the waste steel slag powder is 2: 1.
Comparative example 1
The flame-retardant asphalt is produced by adopting the existing market process.
Test experiments: the roller with the weight of more than 12t is used for rolling without obvious wheel tracks, the phenomena of concentration, pushing, cracking, falling, edge erosion, oil blockage and the like of coarse and fine aggregates cannot be caused, the surface is firm and flat, the connection stubbles are compact and smooth, the connection with other structures is smooth, the phenomena of water accumulation, pollution and the like cannot be caused, the installation of a well frame and a well cover is firm, smooth and stable, and the shaking phenomenon cannot be caused;
the invention is doped with FRMAXTMThe allowable deviation value of the series of flame retardant modifier asphalt in pavement paving is as followsThe following table shows:
the performance test values of the flame-retardant asphalt prepared by the invention in the examples 1-3 and the comparative example 1 are shown in the following table:
as can be seen from the table above, the flame-retardant asphalt prepared by the invention has good fire resistance, can meet the fire-proof requirement of a tunnel, has the friction coefficient, the construction depth and the water permeability coefficient which all reach the standard requirements, and enables FRMAXTMThe flame retardant modifier is directly added into the asphalt to be mixed with other materials, has good dispersibility, is easy to add, has no pollution to the working environment, fundamentally solves the problem of the precipitation of the flame retardant in the asphalt, does not influence the cardiac energy index of the asphalt, improves the flame retardance of the asphalt, and has good smoke suppression performance.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The flame-retardant asphalt special for the tunnel is characterized by comprising the following components in parts by weight: 30-45 parts of asphalt, 20-30 parts of coarse and fine aggregates, 5-15 parts of flame retardant modifier, 10-20 parts of mineral powder, 10-15 parts of waste residue powder, 2-5 parts of stabilizer, 2-8 parts of hydrotalcite and 1-3 parts of dispersant.
2. The flame-retardant asphalt special for tunnels according to claim 1, wherein the mineral powder comprises the following components in parts by weight: 15-30 parts of zeolite, 4-8 parts of tourmaline, 3-5 parts of medical stone, 1-5 parts of sepiolite, 2-6 parts of expanded vermiculite and 3-5 parts of expanded perlite.
3. The flame-retardant asphalt special for tunnels according to claim 2, wherein the preparation method of the mineral powder comprises the following steps:
A. washing and drying zeolite, tourmaline, medical stone, sepiolite, expanded vermiculite and expanded perlite, respectively putting the dried zeolite, tourmaline, medical stone, sepiolite, expanded vermiculite and expanded perlite into a ball mill for ball milling into powder, and sieving the powder with a 100-plus-200-mesh sieve to obtain powder minerals;
B. and putting the powder of the components into a stirring tank, and uniformly stirring for 20-30min to obtain the required mineral powder.
4. The flame-retardant asphalt special for tunnels according to claim 1, wherein the waste slag powder comprises waste iron slag powder and waste steel slag powder, and the ratio of the waste iron slag powder to the waste steel slag powder is 2: 1.
5. The tunnel special flame-retardant asphalt according to claim 1, wherein the dispersant is a mixture of sodium tripolyphosphate and sodium hexametaphosphate in a weight ratio of 1: 3.
6. The special flame-retardant asphalt for tunnels according to claim 1, wherein the stabilizer is sodium silicate, and the flame-retardant modifier is FRMAXTMA series of flame retardant modifiers.
7. The flame-retardant asphalt special for tunnels according to claim 1, wherein the coarse and fine aggregates comprise coarse aggregates and fine aggregates, the coarse aggregates are artificial aggregates such as coal slag, ceramsite and slag, the particle size of the coarse aggregates is 4-5mm, and the particle size of the fine aggregates is less than 4mm, and the coarse aggregates are natural sands.
8. The flame-retardant asphalt special for tunnels according to any one of claims 1 to 7 and the preparation method thereof are characterized in that the preparation method of the flame-retardant asphalt comprises the following steps:
s1, putting the coarse and fine aggregates into drying equipment according to a certain proportion, and drying at the temperature of 180-;
s2, adding a certain amount of flame retardant modifier and the treated coarse and fine aggregates into a stirring tank, uniformly stirring for 2min, adding a certain amount of asphalt heated to 160-170 ℃ into the stirring tank, continuously stirring for 2min, and uniformly stirring;
and S3, adding the mineral powder, the waste residue powder and the hydrotalcite into the stirring tank for uniform mixing, simultaneously adding the dispersing agent and the stabilizing agent in sequence, and continuously stirring for 15-20min until the mixture is uniformly stirred to obtain the flame-retardant asphalt.
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| CN202010959378.XA CN112279557A (en) | 2020-09-14 | 2020-09-14 | Special flame-retardant asphalt for tunnel and preparation method thereof |
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| CN202010959378.XA CN112279557A (en) | 2020-09-14 | 2020-09-14 | Special flame-retardant asphalt for tunnel and preparation method thereof |
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2020
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Application publication date: 20210129 |