CN107285674B - high-crack-resistance epoxy asphalt concrete doped with liquid expanding agent and preparation method thereof - Google Patents
high-crack-resistance epoxy asphalt concrete doped with liquid expanding agent and preparation method thereof Download PDFInfo
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- CN107285674B CN107285674B CN201710602552.3A CN201710602552A CN107285674B CN 107285674 B CN107285674 B CN 107285674B CN 201710602552 A CN201710602552 A CN 201710602552A CN 107285674 B CN107285674 B CN 107285674B
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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
- 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
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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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Abstract
The invention discloses high-crack-resistance liquid-expanding-agent-doped epoxy asphalt concrete which comprises the following raw material components in parts by mass: cement: 100-200 parts of epoxy asphalt: 35-75 parts of a liquid expanding agent: 10-25 parts of aggregate: 240-480 parts of water: 150-300 parts. The invention improves the toughness of the epoxy asphalt cross-linked body and reduces the thermosetting property of the epoxy asphalt cross-linked body by toughening and modifying the epoxy asphalt, utilizes the silicon micro powder to fill the gaps in the epoxy asphalt cross-linked body, reduces the influence of low temperature on the volume shrinkage of concrete, simultaneously dopes the liquid expanding agent, enhances the volume expansion of the concrete, reduces the volume shrinkage of the concrete, has obvious effect on improving the anti-cracking and anti-permeability performance of the concrete, in addition, compared with the powdery expanding agent adopted in the prior art, improves the accuracy of metering and weighing and the uniformity of mixing, simultaneously avoids dust pollution caused by the powdery expanding agent, and is environment-friendly.
Description
Technical Field
The invention relates to high-crack-resistance epoxy asphalt concrete doped with a liquid expanding agent and a preparation method thereof, belonging to the field of concrete.
background
The epoxy asphalt is a multiphase polymer high polymer material formed by adding epoxy resin, curing agent and the like into asphalt, and asphalt molecules are dispersed in a network structure formed by the epoxy resin after the curing reaction with the curing agent to form an irreversible cured product, so that the thermosetting epoxy resin is not softened or flowed again after being cured and heated under pressure, thereby endowing the asphalt with excellent physical and mechanical properties and having better high-temperature stability compared with other thermoplastic modified asphalt. However, when the temperature is reduced to a certain degree, the epoxy asphalt material becomes hard and brittle and then cracks, and once cracks appear, the thermosetting epoxy asphalt can not be heated and self-healed like other modified asphalt, so that the epoxy asphalt material can be damaged in an accelerated way under the action of various loads, water, fog and the like, a larger area of diseases are formed, and the requirement of steel bridge deck pavement on the performance of the mixture in actual engineering application is difficult to meet.
the concrete material has strength increase and volume shrinkage during hydration hardening, and the shrinkage deformation causes cracks inside the concrete, thereby affecting the stress performance and durability of the concrete. With the wide application of high-performance concrete, the generation of concrete cracks can be prevented or reduced by adding a proper amount of expanding agent into the concrete. The expanding agent is mainly used in underground waterproof, large-structure and large-volume concrete and other projects, and is widely applied to buildings such as subways, high-speed rails, warehouses, tunnels, mixing stations and the like.
disclosure of Invention
the purpose is as follows: the invention provides high-crack-resistance epoxy asphalt concrete doped with a liquid expanding agent and a preparation method thereof.
The technical scheme of the invention is as follows:
the high-crack-resistance liquid-expanding-agent-doped epoxy asphalt concrete comprises the following raw material components in parts by mass: cement: 100-200 parts of epoxy asphalt: 35-75 parts of a liquid expanding agent: 10-25 parts of aggregate: 240-480 parts of water: 150-300 parts; wherein the content of the first and second substances,
The epoxy asphalt comprises: the epoxy resin-base asphalt composite material comprises epoxy resin, base asphalt, a toughening agent, a compatilizer, a diluent, a curing agent and a filler, wherein the using amount ratio of the epoxy resin to the base asphalt is as follows by mass: matrix asphalt 1: 4-8; the amount of the toughening agent is 5-25% of the epoxy resin by mass; the amount of the compatilizer is 2-16% by mass of the epoxy resin, the amount of the diluent is 5-20% by mass of the epoxy resin, the amount of the curing agent is 0.3-1.5% by mass of the epoxy resin, and the amount of the filler is 7-12% by mass of the epoxy resin;
The liquid swelling agent includes: the slump retaining agent comprises an expansion component, a shrinkage reducing component, a slump retaining component, a tackifying component, a retarding component and water, wherein the mass parts of the components are as follows: an expansion component: 20-55 parts of shrinkage reducing component: 30-120 parts of slump retaining component: 10-70, and a tackifying component: 15-20, and a retarding component: 4-8 parts of water: 800-950 parts;
The aggregate comprises coarse aggregate, fine aggregate and fly ash, wherein the dosage ratio of each component is, by mass, coarse aggregate: fine aggregate: 20-40% of fly ash: 12-32: 4-9.
Preferably, the epoxy resin is one or more of an epoxidized phenol novolac resin, a resorcinol bisglycidyl ether type epoxy resin and a bisphenol a type epoxy resin.
Preferably, the base asphalt is ground to 3mm to 13mm using an asphalt grinder.
preferably, the compatibilizer is one of sodium dodecylbenzene sulfonate, sodium hexadecyl sulfonate and alpha-sulfo fatty acid methyl ester.
preferably, the diluent is a non-reactive diluent and is one of absolute ethyl alcohol, polyhydric alcohol, ethyl acetate and butyl acetate.
Preferably, the curing agent is one of polyamine, modified fatty amine, polyamide containing active genes and phenolic resin.
Preferably, the filler is silica micropowder.
Preferably, the toughening agent is one of carboxyl liquid nitrile rubber, polysulfide rubber, liquid silicone rubber, polyether, polysulfone and polyimide.
Preferably, the expansion component is silicon oxide, the shrinkage reducing component is a shrinkage reducing polycarboxylic acid water reducing agent, the slump retaining component is a polycarboxylic acid slump retaining agent, the tackifying component is a styrene copolymerized carboxyl compound, the retardation component is one of lignosulfonate and derivatives thereof, potassium tartrate, calcium tartrate, sodium phosphate, disodium hydrogen phosphate, sodium pyrophosphate, alkyl phosphate and disodium ethylene diamine tetraacetate.
a preparation method of high crack resistance epoxy asphalt concrete doped with liquid expanding agent is characterized by comprising the following specific steps:
The method comprises the following steps: preparation of epoxy asphalt
heating the ground substrate asphalt ground by an asphalt grinder to 95-140 ℃, adding the ground substrate asphalt into a first stirring reaction kettle, and simultaneously adding a toughening agent, a compatilizer and a curing agent in proportion to fully mix for 20-30 minutes until the mixture is uniformly mixed; adding epoxy resin and a diluent into a second stirring reaction kettle in proportion, heating to 55-75 ℃, stirring, fully mixing uniformly, adding a mixture of the epoxy resin and the diluent and a filler into a first stirring reaction kettle in proportion, and continuously stirring and preserving heat for 45-80 minutes at 85-130 ℃ to obtain epoxy asphalt;
Step two: preparation of liquid swelling agent
Firstly weighing an expansion component and a coagulation component according to a proportion, placing the weighed expansion component and coagulation component into water added according to a proportion, fully stirring and mixing until the components are completely dissolved, weighing a shrinkage reducing component, a slump retaining component and a tackifying component according to a proportion after the components are completely dissolved, and stirring at normal temperature until the components are completely mixed;
step three: preparation of concrete
and (3) mixing the cement, the epoxy asphalt prepared in the first step, the liquid expanding agent prepared in the second step, aggregate and water in proportion at 105-145 ℃, and uniformly stirring to obtain the high-crack-resistance liquid-expanding-agent-doped epoxy asphalt concrete.
Has the advantages that: the invention provides high-crack-resistance epoxy asphalt concrete doped with a liquid expanding agent, which improves the toughness of an epoxy asphalt cross-linked body and reduces the thermosetting property of the epoxy asphalt cross-linked body by toughening and modifying the epoxy asphalt, utilizes silicon micro powder to fill gaps in the epoxy asphalt cross-linked body and reduces the influence of low temperature on the volume shrinkage of the concrete, and simultaneously, is doped with the liquid expanding agent, enhances the volume expansion of the concrete and reduces the volume shrinkage of the concrete, has obvious effect on improving the crack resistance and the impermeability of the concrete.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.
The high-crack-resistance liquid-expanding-agent-doped epoxy asphalt concrete comprises the following raw material components in parts by mass: cement: 100-200 parts of epoxy asphalt: 35-75 parts of a liquid expanding agent: 10-25 parts of aggregate: 240-480 parts of water: 150-300 parts; wherein the content of the first and second substances,
The epoxy asphalt comprises: the epoxy resin-base asphalt composite material comprises epoxy resin, base asphalt, a toughening agent, a compatilizer, a diluent, a curing agent and a filler, wherein the using amount ratio of the epoxy resin to the base asphalt is as follows by mass: matrix asphalt 1: 4-8; the amount of the toughening agent is 5-25% of the epoxy resin by mass; the amount of the compatilizer is 2-16% by mass of the epoxy resin, the amount of the diluent is 5-20% by mass of the epoxy resin, the amount of the curing agent is 0.3-1.5% by mass of the epoxy resin, and the amount of the filler is 7-12% by mass of the epoxy resin;
the liquid swelling agent includes: the slump retaining agent comprises an expansion component, a shrinkage reducing component, a slump retaining component, a tackifying component, a retarding component and water, wherein the mass parts of the components are as follows: an expansion component: 20-55 parts of shrinkage reducing component: 30-120 parts of slump retaining component: 10-70, and a tackifying component: 15-20, and a retarding component: 4-8 parts of water: 800-950 parts;
The aggregate comprises coarse aggregate, fine aggregate and fly ash, wherein the dosage ratio of each component is, by mass, coarse aggregate: fine aggregate: 20-40% of fly ash: 12-32: 4-9.
Preferably, the epoxy resin is one or more of an epoxidized phenol novolac resin, a resorcinol bisglycidyl ether type epoxy resin and a bisphenol a type epoxy resin.
preferably, the base asphalt is ground to 3mm to 13mm using an asphalt grinder.
Preferably, the compatibilizer is one of sodium dodecylbenzene sulfonate, sodium hexadecyl sulfonate and alpha-sulfo fatty acid methyl ester.
Preferably, the diluent is a non-reactive diluent and is one of absolute ethyl alcohol, polyhydric alcohol, ethyl acetate and butyl acetate.
preferably, the curing agent is one of polyamine, modified fatty amine, polyamide containing active genes and phenolic resin.
Preferably, the filler is silica micropowder.
Preferably, the toughening agent is one of carboxyl liquid nitrile rubber, polysulfide rubber, liquid silicone rubber, polyether, polysulfone and polyimide.
Preferably, the expansion component is silicon oxide, the shrinkage reducing component is a shrinkage reducing polycarboxylic acid water reducing agent, the slump retaining component is a polycarboxylic acid slump retaining agent, the tackifying component is a styrene copolymerized carboxyl compound, the retardation component is one of lignosulfonate and derivatives thereof, potassium tartrate, calcium tartrate, sodium phosphate, disodium hydrogen phosphate, sodium pyrophosphate, alkyl phosphate and disodium ethylene diamine tetraacetate.
A preparation method of high crack resistance epoxy asphalt concrete doped with liquid expanding agent is characterized by comprising the following specific steps:
The method comprises the following steps: preparation of epoxy asphalt
Heating the ground substrate asphalt ground by an asphalt grinder to 95-140 ℃, adding the ground substrate asphalt into a first stirring reaction kettle, and simultaneously adding a toughening agent, a compatilizer and a curing agent in proportion to fully mix for 20-30 minutes until the mixture is uniformly mixed; adding epoxy resin and a diluent into a second stirring reaction kettle in proportion, heating to 55-75 ℃, stirring, fully mixing uniformly, adding a mixture of the epoxy resin and the diluent and a filler into a first stirring reaction kettle in proportion, and continuously stirring and preserving heat for 45-80 minutes at 85-130 ℃ to obtain epoxy asphalt;
Step two: preparation of liquid swelling agent
Firstly weighing an expansion component and a coagulation component according to a proportion, placing the weighed expansion component and coagulation component into water added according to a proportion, fully stirring and mixing until the components are completely dissolved, weighing a shrinkage reducing component, a slump retaining component and a tackifying component according to a proportion after the components are completely dissolved, and stirring at normal temperature until the components are completely mixed;
step three: preparation of concrete
And (3) mixing the cement, the epoxy asphalt prepared in the first step, the liquid expanding agent prepared in the second step, aggregate and water in proportion at 105-145 ℃, and uniformly stirring to obtain the high-crack-resistance liquid-expanding-agent-doped epoxy asphalt concrete.
Example 1
1) preparing epoxy asphalt: heating the ground base asphalt (the particle size is 3-6 mm): the epoxy resin is 4:1 by mass) ground by an asphalt grinder to 100 ℃, adding the ground base asphalt into a first stirring reaction kettle, and simultaneously adding a toughening agent (polyimide), a compatilizer (sodium dodecyl benzene sulfonate) and a curing agent (the toughening agent is 5% of the epoxy resin by mass, the compatilizer is 2% of the epoxy resin by mass, the curing agent is polyamine and is 0.3% of the epoxy resin by mass) in proportion, and fully mixing for 20 minutes until the mixture is uniform; adding epoxy resin (epoxidized novolac resin) and diluent (absolute ethyl alcohol) into a second stirring reaction kettle in proportion, heating to 55 ℃, stirring, fully and uniformly mixing, adding a mixture of the epoxy resin (matrix asphalt: epoxy resin is 4:1 by mass) and the diluent (the diluent accounts for 5% of the epoxy resin by mass) and filler (the filler is silica powder and accounts for 7% of the epoxy resin by mass) into a first stirring reaction kettle in proportion, and continuously stirring and preserving heat for 45 minutes at 85 ℃ to obtain epoxy asphalt;
2) Preparing a liquid expanding agent: firstly weighing silicon oxide and sodium lignosulfonate according to a certain proportion, placing the weighed silicon oxide and sodium lignosulfonate in water added according to a certain proportion, fully stirring and mixing until the silicon oxide and the sodium lignosulfonate are completely dissolved, weighing a shrinkage-reducing polycarboxylic acid water reducing agent, a polycarboxylic acid slump retaining agent and a styrene copolymerized carboxyl compound according to a certain proportion, and stirring at normal temperature until the silicon oxide, the sodium lignosulfonate, the water, the shrinkage-reducing polycarboxylic acid water reducing agent, the polycarboxylic acid slump retaining agent and the styrene copolymerized carboxyl compound are completely mixed, wherein (by mass, the silicon oxide, the sodium lignosulfonate, the polycarboxylic acid water reducing agent, the polycarboxylic acid slump retaining agent and the styrene copolymerized carboxyl compound are 20;
3) Preparing concrete: and (2) mixing the cement, the epoxy asphalt prepared in the first step, the liquid expanding agent prepared in the second step, aggregate (coarse aggregate: fine aggregate: fly ash: 20:12:4) and water in proportion at 105 ℃ (by mass, the cement: epoxy asphalt: liquid expanding agent: aggregate: water: 100:35:10:240:150), and uniformly stirring to obtain the high-crack-resistance liquid-expanding-agent-doped epoxy asphalt concrete, which is marked as a finished product 1.
Example 2
1) Preparing epoxy asphalt: heating the ground base asphalt (the particle size is 3-6 mm): the epoxy resin is 8:1 by mass) ground by an asphalt grinding machine to 140 ℃, adding the ground base asphalt into a first stirring reaction kettle, and simultaneously adding a toughening agent (polyimide), a compatilizer (sodium dodecyl benzene sulfonate) and a curing agent (the toughening agent is 20% of the epoxy resin by mass, the compatilizer is 16% of the epoxy resin by mass, the curing agent is polyamine and is 1.5% of the epoxy resin by mass) in proportion, and fully mixing for 30 minutes until the mixture is uniform; adding epoxy resin (epoxidized novolac resin) and diluent (absolute ethyl alcohol) into a second stirring reaction kettle in proportion, heating to 75 ℃, stirring, fully and uniformly mixing, adding a mixture of epoxy resin (matrix asphalt: epoxy resin: 8:1 by mass) and diluent (diluent is 20% of epoxy resin by mass) and filler (filler is silicon powder and 12% of epoxy resin by mass) into a first stirring reaction kettle in proportion, and continuously stirring and keeping the temperature for 80 minutes at 130 ℃ to obtain epoxy asphalt;
2) Preparing a liquid expanding agent: firstly weighing silicon oxide and sodium lignosulfonate according to a certain proportion, placing the weighed silicon oxide and sodium lignosulfonate in water added according to a certain proportion, fully stirring and mixing until the silicon oxide and the sodium lignosulfonate are completely dissolved, weighing a shrinkage-reducing polycarboxylic acid water reducing agent, a polycarboxylic acid slump retaining agent and a styrene copolymerized carboxyl compound according to a certain proportion, and stirring at normal temperature until the silicon oxide, the sodium lignosulfonate, the water, the shrinkage-reducing polycarboxylic acid water reducing agent, the polycarboxylic acid slump retaining agent and the styrene copolymerized carboxyl compound are completely mixed, wherein (by mass, the silicon oxide, the sodium lignosulfonate, the water, the polycarboxylic acid water reducing agent, the polycarboxylic acid slump retaining agent and the styrene copolymerized carboxyl compound are 55:8:950: 120;
3) Preparing concrete: and (2) mixing the cement, the epoxy asphalt prepared in the first step, the liquid expanding agent prepared in the second step, aggregate (coarse aggregate: fine aggregate: fly ash: 40:32:9) and water in proportion at 145 ℃ (by mass, the cement: epoxy asphalt: liquid expanding agent: aggregate: water: 200:75:25:480:300), and uniformly stirring to obtain the high-crack-resistance liquid-expanding-agent-doped epoxy asphalt concrete, which is marked as a finished product 2.
Embodiment 3
1) Preparing epoxy asphalt: heating the ground base asphalt (the particle size is 3-6 mm): the epoxy resin is 6:1 by mass) ground by an asphalt grinder to 120 ℃, adding the heated base asphalt into a first stirring reaction kettle, and simultaneously adding a toughening agent (polyimide), a compatilizer (sodium dodecyl benzene sulfonate) and a curing agent (the toughening agent is 20% of the epoxy resin by mass, the compatilizer is 12% of the epoxy resin by mass, the curing agent is polyamine and is 1.2% of the epoxy resin by mass) in proportion, and fully mixing for 30 minutes until the mixture is uniform; adding epoxy resin (epoxidized novolac resin) and diluent (absolute ethyl alcohol) into a second stirring reaction kettle in proportion, heating to 65 ℃ for stirring, fully and uniformly mixing, adding a mixture of the epoxy resin (matrix asphalt: epoxy resin ═ 6:1 by mass) and the diluent (the diluent is 20% of the epoxy resin by mass) and filler (the filler is silica powder and is 10% of the epoxy resin by mass) into a first stirring reaction kettle in proportion, and continuously stirring and preserving heat for 80 minutes at the temperature of 110 ℃ to obtain epoxy asphalt;
2) preparing a liquid expanding agent: firstly weighing silicon oxide and sodium lignosulfonate according to a certain proportion, placing the weighed silicon oxide and sodium lignosulfonate in water added according to a certain proportion, fully stirring and mixing until the silicon oxide and the sodium lignosulfonate are completely dissolved, weighing a shrinkage-reducing polycarboxylic acid water reducing agent, a polycarboxylic acid slump retaining agent and a styrene copolymerized carboxyl compound according to a certain proportion, and stirring at normal temperature until the silicon oxide, the sodium lignosulfonate, the water, the shrinkage-reducing polycarboxylic acid water reducing agent, the polycarboxylic acid slump retaining agent and the styrene copolymerized carboxyl compound are completely mixed, wherein (by mass, the silicon oxide, the sodium lignosulfonate, the polycarboxylic acid water reducing agent, the polycarboxylic acid slump retaining agent and the styrene copolymerized carboxyl compound are 36;
3) Preparing concrete: and (3) mixing the cement, the epoxy asphalt prepared in the first step, the liquid expanding agent prepared in the second step, aggregate (coarse aggregate: fine aggregate: fly ash: 35:28:6) and water in proportion at 120 ℃ (by mass, the cement: epoxy asphalt: liquid expanding agent: aggregate: water: 150:60:20:380:250), and uniformly stirring to obtain the high-crack-resistance liquid-expanding-agent-doped epoxy asphalt concrete, which is marked as a finished product 3.
Epoxy asphalt concrete low-temperature cracking test:
The finished products 1, 2 and 3 obtained above are respectively made into test pieces 1, 2 and 3 of 4x4x26cm3, the test pieces 1, 2 and 3 are clamped on a stress testing machine placed in a high-low temperature box, and the stress and the displacement of the test pieces are tested by a stress sensor and a displacement sensor. During the test, the high-low temperature box is cooled at the speed of 20 ℃ per hour, the test piece generates displacement due to cooling shrinkage, the displacement value is measured by a sensor until cracking occurs, the cracking temperature is recorded, and the cracking temperature of the epoxy asphalt concrete prepared under different conditions is shown in table 1.
TABLE 1
| Sample (I) | temperature at cracking (. degree.C.) | 3stress at cracking (kg/cm3) |
| test piece 1 | -39.59～-43.22 | 36.78～38.71 |
| Test piece 2 | -42.33～-48.53 | 33.74～37.52 |
| Test piece 3 | -55.78～-58.66 | 45.36～55.66 |
As can be seen from the above table, the epoxy asphalt concrete after the liquid expanding agent is added and the filler toughening treatment is performed on the epoxy asphalt has good crack resistance, and shows high cold resistance at low temperature compared with the conventional epoxy asphalt concrete, wherein the third finished product (i.e., example 3) is the preferred embodiment of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. The high-crack-resistance liquid-expanding-agent-doped epoxy asphalt concrete is characterized by comprising the following raw material components in parts by mass: cement: 100-200 parts of epoxy asphalt: 35-75 parts of a liquid expanding agent: 10-25 parts of aggregate: 240-480 parts of water: 150-300 parts; wherein the content of the first and second substances,
The epoxy asphalt comprises: the epoxy resin-base asphalt composite material comprises epoxy resin, base asphalt, a toughening agent, a compatilizer, a diluent, a curing agent and a filler, wherein the using amount ratio of the epoxy resin to the base asphalt is as follows by mass: base asphalt = 1: 4-8; the amount of the toughening agent is 5-25% of the epoxy resin by mass; the amount of the compatilizer is 2-16% by mass of the epoxy resin, the amount of the diluent is 5-20% by mass of the epoxy resin, the amount of the curing agent is 0.3-1.5% by mass of the epoxy resin, and the amount of the filler is 7-12% by mass of the epoxy resin;
the liquid swelling agent includes: the slump retaining agent comprises an expansion component, a shrinkage reducing component, a slump retaining component, a tackifying component, a retarding component and water, wherein the mass parts of the components are as follows: an expansion component: 20-55 parts of shrinkage reducing component: 30-120 parts of slump retaining component: 10-70, and a tackifying component: 15-20, and a retarding component: 4-8 parts of water: 800-950 parts;
The aggregate comprises coarse aggregate, fine aggregate and fly ash, wherein the dosage ratio of each component is, by mass, coarse aggregate: fine aggregate: fly ash = 20-40: 12-32: 4-9; the compatilizer is one of sodium dodecyl benzene sulfonate, sodium hexadecyl sulfonate and alpha-sulfo fatty acid methyl ester; the diluent is a non-reactive diluent and is one of absolute ethyl alcohol, polyhydric alcohol, ethyl acetate and butyl acetate; the curing agent is one of polyamine, modified fatty amine, active gene-containing polyamide and phenolic resin; the filler is silicon micropowder; the toughening agent is one of carboxyl liquid nitrile rubber, polysulfide rubber, liquid silicone rubber, polyether, polysulfone and polyimide; the expansion component is silicon oxide, the shrinkage reducing component is a shrinkage reducing polycarboxylic acid water reducing agent, the slump retaining component is a polycarboxylic acid slump retaining agent, the tackifying component is styrene copolymerization carboxyl combination, the retardation component is one of lignosulfonate and derivatives thereof, potassium tartrate, calcium tartrate, sodium phosphate, disodium hydrogen phosphate, sodium pyrophosphate, alkyl phosphate and disodium ethylene diamine tetraacetate.
2. The high crack resistance liquid-mixed expansive agent epoxy asphalt concrete according to claim 1, wherein the epoxy resin is one or more of epoxy novolac resin, resorcinol bisglycidyl ether type epoxy resin and bisphenol A type epoxy resin.
3. The high crack resistance liquid-mixed expansive agent epoxy asphalt concrete according to claim 1, wherein the matrix asphalt is ground to 3mm to 13mm by an asphalt grinder.
4. The preparation method of the high crack resistance liquid-mixed expansive agent epoxy asphalt concrete according to claim 1,
The method comprises the following steps: preparation of epoxy asphalt
heating the ground substrate asphalt ground by an asphalt grinder to 100-140 ℃, adding the ground substrate asphalt into a first stirring reaction kettle, and simultaneously adding a toughening agent, a compatilizer and a curing agent in proportion to fully mix for 20-30 minutes until the mixture is uniformly mixed; adding epoxy resin and a diluent into a second stirring reaction kettle in proportion, heating to 55-75 ℃, stirring, fully mixing uniformly, adding a mixture of the epoxy resin and the diluent and a filler into a first stirring reaction kettle in proportion, and continuously stirring and preserving heat for 45-80 minutes at 85-130 ℃ to obtain epoxy asphalt;
Step two: preparation of liquid swelling agent
firstly weighing an expansion component and a coagulation component according to a proportion, placing the weighed expansion component and coagulation component into water added according to a proportion, fully stirring and mixing until the components are completely dissolved, weighing a shrinkage reducing component, a slump retaining component and a tackifying component according to a proportion after the components are completely dissolved, and stirring at normal temperature until the components are completely mixed;
step three: preparation of concrete
And (3) mixing the cement, the epoxy asphalt prepared in the first step, the liquid expanding agent prepared in the second step, aggregate and water in proportion at 105-145 ℃, and uniformly stirring to obtain the high-crack-resistance liquid-doped expanding agent epoxy asphalt concrete.
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| CN115819027B (en) * | 2022-12-24 | 2023-06-30 | 北京路新沥青混凝土有限公司 | Hot-mix epoxy asphalt concrete and preparation method and application thereof |
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| CN102180622B (en) * | 2011-03-07 | 2012-11-14 | 东南大学 | Cement epoxy asphalt mortar for ballastless track and preparation method thereof |
| CN102358690B (en) * | 2011-08-17 | 2012-11-07 | 句容宁武高新技术发展有限公司 | Epoxy asphalt cement mortar, preparation method, and application of epoxy asphalt cement mortar in ballastless tracks |
| CN102515650B (en) * | 2011-12-27 | 2013-07-17 | 武汉理工大学 | Phase change thermoregulation cement pitch composition concrete and preparation method thereof |
| CN104529262B (en) * | 2015-01-16 | 2017-01-11 | 深圳市公路交通工程试验检测中心 | Resin-grouted water-permeable pavement material and preparation method thereof |
| CN105948664B (en) * | 2016-04-27 | 2018-03-16 | 武汉理工大学 | A kind of asphalt pavement crack fast repairing material and preparation method thereof of lower shrinkage, high bond strength |
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2017
- 2017-07-21 CN CN201710602552.3A patent/CN107285674B/en active Active
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