CN114573275A - Plant fiber reinforced epoxy emulsified asphalt micro-surfacing mixture and preparation method thereof - Google Patents
Plant fiber reinforced epoxy emulsified asphalt micro-surfacing mixture and preparation method thereof Download PDFInfo
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- CN114573275A CN114573275A CN202210336799.6A CN202210336799A CN114573275A CN 114573275 A CN114573275 A CN 114573275A CN 202210336799 A CN202210336799 A CN 202210336799A CN 114573275 A CN114573275 A CN 114573275A
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/248—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork from specific plants, e.g. hemp fibres
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/281—Polyepoxides
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Botany (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a plant fiber reinforced epoxy emulsified asphalt micro-surfacing mixture and a preparation method thereof, wherein the plant fiber reinforced epoxy emulsified asphalt micro-surfacing mixture comprises the following components in parts by mass: 100 parts of mineral aggregate, 10-16 parts of cationic emulsifier, 0.5-14 parts of waterborne epoxy resin emulsion, 8-15 parts of water and 0.4-0.6 part of sugarcane plant fiber. The micro-surfacing mixture prepared by reinforcing bagasse fibers and modifying epoxy resin has good adhesiveness with stone, compatibility with emulsified asphalt and stability, and test results show that the micro-surfacing mixture can greatly improve the wear resistance, water damage resistance and rutting resistance of micro-surfacing, prolong the service life of a pavement, repair various diseases of the pavement and obviously improve the driving comfort.
Description
Technical Field
The invention belongs to the field of road engineering, and particularly relates to a plant fiber reinforced epoxy emulsified asphalt micro-surfacing mixture and a preparation method thereof.
Background
After several years of normal operation, some asphalt pavement diseases such as ruts, cracks, looseness and the like are inevitably generated on the expressway, and although the expressway does not bring about very serious traffic safety problems, the expressway has great negative effects on the aspects of the service life of the pavement, the driving comfort and the like.
The micro-surfacing is a sealing layer which is prepared by mixing stone chips or sand, fillers (cement, lime, fly ash, stone powder and the like), modified emulsified asphalt, an admixture and water according to a certain proportion into a flowing mixture and then uniformly spreading the flowing mixture on the pavement. The micro-surfacing is a preventive maintenance technical measure and is suitable for preventive maintenance of important traffic roads such as expressways, city trunks, airport runways and the like. The micro-surfacing has performance advantages in many aspects, such as waterproofness, and can be used for paving the whole pavement, increasing the waterproof surface and preventing the water from seeping downwards; the wear resistance is realized, and a wear layer is additionally arranged on the surface of the original pavement; the antiskid performance is improved, the surface roughness of the old pavement is reduced year by year along with the increase of the service time, and the friction of the newly paved pavement can be greatly increased; and also has the functions of preventing the pavement from aging and loosening, prolonging the service life of the pavement, filling tracks and the like. In addition, the micro-surfacing has the advantages of convenient construction, low construction cost, quick open traffic and the like, and has very wide application prospect.
The micro-surfacing is a thin-layer structure which is prepared by mixing polymer modified emulsified asphalt, mineral aggregate, water and additives according to a certain proportion, paving the mixture on a road surface through special equipment and quickly opening traffic, and has extremely high requirements on the composition materials; secondly, in order to ensure that the asphalt has better adhesiveness with stone materials, cationic emulsified asphalt is usually used, polymer modification is needed, and SBR latex or SBS modification is usually adopted, so that the micro-surfacing overlay can still achieve longer service life under the action of heavy traffic.
The water-based epoxy resin has the characteristics of common thermosetting materials, forms a grid structure after being cured and crosslinked, has high colloid elasticity, and does not deform, crack or melt under the conditions of repeated load action, high temperature and low temperature. The water-based epoxy resin serving as an emulsified asphalt modifier has excellent physical and chemical properties, and can obviously improve the pavement performance of the emulsified asphalt.
Sugarcane is the most main raw material for sugar production in south China, and the sugarcane waste after sugar production is one of the largest agricultural wastes and is also a very important renewable biomass raw material. The main components of the bagasse comprise cellulose, hemicellulose, lignin and the like, and the bagasse is a plant fiber raw material with excellent performance. The bagasse resource is very rich and low in price, and the basic performance characteristics of the bagasse resource are similar to those of lignocellulose for common roads, so that the bagasse resource has very obvious economic advantages and wide application prospects when being used as a strong body of a composite material for roads.
Disclosure of Invention
The invention aims to overcome the problems in the prior art, and provides a method for modifying cationic emulsified asphalt by using an aqueous epoxy resin, effectively improving the colloid layout of the asphalt by adding bagasse fibers, better improving the high-temperature invariance, low-temperature crack resistance and durability of slurry impurities by virtue of the adsorption and multidirectional reinforcement effects of the fibers, inhibiting and delaying reflection cracks to a certain extent, and prolonging the service life of a road.
The technical scheme of the invention is as follows:
the plant fiber reinforced epoxy emulsified asphalt micro-surfacing mixture comprises the following components in parts by mass: 100 parts of mineral aggregate, 10-16 parts of cationic emulsifier, 0.5-14 parts of waterborne epoxy resin emulsion, 8-15 parts of water and 0.4-0.6 part of sugarcane plant fiber.
The epoxy resin is applied to the micro-surfacing mixture of the emulsified asphalt, and after the modified emulsified asphalt is modified by the aqueous epoxy resin emulsion, the adhesiveness of the emulsified asphalt and stone is improved, the compatibility and the stability of the emulsified asphalt are good, and the phenomenon of poor adhesiveness of the emulsified asphalt and the stone is avoided. After the bagasse plant fibers are reinforced and modified, the asphalt colloid layout is effectively improved, the high-temperature invariability, the low-temperature crack resistance and the durability of slurry impurities can be better improved by virtue of the adsorption and multidirectional reinforcement effects of the fibers, pavement cracks can be inhibited and delayed to a certain extent, and the service life of a road is prolonged.
The cement mortar further comprises an additive, the mass ratio of the mineral aggregate to the additive is 100:2-4, and the additive is one or more of cement, limestone mineral powder, slaked lime and fibers.
After the preferable scheme is adopted, the strength of the micro-surfacing mixture at the early stage and the later stage is obviously enhanced, and the workability of the mixture can be improved.
Further, the mineral aggregate is composed of coarse aggregate, fine aggregate and filler; the weight ratio of the coarse aggregate, the fine aggregate and the filler is 0-30:55-95: 5-15; the nominal grain diameter of the coarse aggregate is 4.75mm-9.5 mm; the nominal grain size of the fine aggregate is less than or equal to 4.75 mm; the nominal grain size of the filler is less than or equal to 0.075 mm.
After the optimal scheme is adopted, the micro-surfacing mixture is reasonable in gradation, a compact structure can be formed, gaps of the original road surface are fully filled, and the formed road surface is smoother and more attractive than the original road surface.
Further, the aqueous epoxy resin emulsion is a mixed emulsion of aqueous epoxy resin and an aqueous epoxy curing agent, wherein the mass ratio of the aqueous epoxy resin to the aqueous epoxy curing agent is 1: 4.
After the optimal scheme is adopted, the water-based epoxy resin can exert the optimal bonding performance, the bonding strength of the micro-surfacing mixture is enhanced, the wear resistance of the micro-surfacing mixture is further improved, and diseases such as pavement looseness and the like are effectively prevented.
Further, the water-based epoxy resin is water-based emulsion of epoxy resin, and the solid content is 50-60%.
After the preferred scheme is adopted, the epoxy resin can be fully dispersed in the aqueous solution, and the water volatilization time of the mixture can not be too long under the solid content, so that the unnecessary maintenance time is shortened.
Further, the waterborne epoxy resin curing agent is a polyethylene polyamine curing agent emulsion, and the solid content is 50-70%.
After the preferable scheme is adopted, the epoxy resin curing agent can be fully dispersed in the aqueous solution, and forms a proper blending proportion with the epoxy resin emulsion, so that the adhesive property of the epoxy resin material is exerted to the maximum extent.
Further, the sugarcane plant fiber is saturated face dry fiber obtained by soaking bagasse fiber in a sodium hydroxide solution with the concentration of 3-8% for 24h and naturally drying.
After the preferable scheme is adopted, the obtained saturation surface dry fiber has higher toughness and oil absorption rate than untreated bagasse fiber, so that the bonding property of bagasse and a mixture is further enhanced, and the finally formed micro-surface mixture has higher toughness.
The invention also provides a preparation method of the plant fiber reinforced epoxy emulsified asphalt micro-surfacing mixture, which comprises the following steps:
step 1: preparing a material;
step 2: mixing the aqueous epoxy resin emulsion and the cationic emulsified asphalt, and uniformly stirring to obtain aqueous epoxy resin modified emulsified asphalt for later use;
and step 3: mixing and stirring the mineral aggregate and the bagasse fiber uniformly; stirring for too long time to excessively grind the fibers, wherein the manual stirring time is not more than 60s, and the mechanical stirring time is not more than 30 s;
and 4, step 4: adding water into the mixture of the mineral aggregate and the bagasse fibers and uniformly stirring
And 5: and (3) adding the aqueous epoxy resin modified emulsified asphalt prepared in the step (2) into the mixture obtained in the step (4), uniformly stirring, and maintaining at normal temperature for 24 hours to obtain the vegetable fiber reinforced aqueous epoxy resin emulsified asphalt micro-surfacing mixture.
Further, the stirring time in the step 5 is 30s-120 s.
Further, the water-based epoxy resin emulsion is prepared by mixing and stirring water-based epoxy resin and a water-based epoxy curing agent, wherein the weight ratio of the water-based epoxy resin to the water-based epoxy curing agent to water is 1:4:5, and the stirring time is 5-10 min.
After the preferable scheme is adopted, the obtained micro-surfacing mixture has the best workability and pavement performance, can ensure that the micro-surfacing mixture has enough strength and open traffic after 24 hours of curing, and has stronger wear resistance, water damage resistance and rutting resistance compared with the common micro-surfacing curing.
The beneficial effects of the invention are embodied in the following aspects:
1) the invention applies the epoxy resin to the micro-surface mixture of the emulsified asphalt for the first time, and the modified aqueous epoxy resin emulsion improves the adhesiveness of the emulsified asphalt with stone, has good compatibility and stability with the emulsified asphalt, and avoids the phenomenon of poor adhesiveness of the emulsified asphalt with stone.
2) According to the invention, the plant bagasse fibers are applied to the epoxy resin emulsified asphalt micro-surfacing mixture for the first time, after the bagasse plant fibers are reinforced and modified, not only is the asphalt colloid layout effectively improved, but also the high-temperature invariability, the low-temperature crack resistance and the durability of the thin slurry inclusion can be better improved by virtue of the adsorption and multidirectional reinforcement effects of the fibers, and the pavement cracks can be inhibited and delayed to a certain extent, so that the service life of a road is prolonged.
Detailed Description
Although the present invention has been described in detail, the present invention is not limited thereto, and those skilled in the art can modify the principle of the present invention, and thus, various modifications made in accordance with the principle of the present invention should be understood to fall within the scope of the present invention.
Example 1
1. Preparation of aqueous epoxy resin emulsion
And (3) mixing 100g of water-based epoxy resin and 150g of diethylenetriamine, and fully stirring the mixed emulsion for 10 minutes by using a low-speed stirrer to ensure that the mixture is uniform and consistent to obtain the epoxy resin emulsion.
Wherein the water-based epoxy resin is standard liquid epoxy resin, and the solid content of the water-based epoxy resin is 50 percent;
wherein the solid content of the diethylenetriamine is 50 percent.
2. Preparation of aqueous epoxy emulsified asphalt
And (3) pouring 50g of the aqueous epoxy resin emulsion into 100g of the cationic emulsified asphalt, and uniformly stirring to obtain the aqueous epoxy emulsified asphalt.
3. Preparation of micro-surfacing mix
Preparing materials according to the following weight ratio:
1000g of mineral aggregate
Bagasse fiber 4g
80g of water
170g of aqueous epoxy emulsified asphalt
And (3) soaking the bagasse fibers in a sodium hydroxide solution with the concentration of 3-8% for 24h, and naturally airing to obtain saturated surface dry fibers.
Adding water into the uniform mixture of the alkali-treated bagasse fibers and the mineral aggregate, uniformly stirring at normal temperature, adding the aqueous epoxy resin emulsified asphalt, and continuously stirring for 60 seconds to obtain the composite material.
Wherein the mineral aggregate consists of coarse aggregate, fine aggregate and filler; the weight ratio of the coarse aggregate to the fine aggregate to the filler is 20:60: 10; the nominal grain size of the coarse aggregate is that delta is more than 4.75mm and less than or equal to 9.5 mm; the nominal grain diameter of the fine aggregate is that delta is less than or equal to 4.75 mm; the nominal particle size of the filler is delta less than or equal to 0.075 mm.
Example 2
1. Preparation of aqueous epoxy resin emulsion
And (3) mixing 100g of water-based epoxy resin and 120g of triethylene tetramine, and fully stirring the mixed emulsion for 10 minutes by using a low-speed stirrer to ensure that the mixture is uniform and consistent to obtain the epoxy resin emulsion.
Wherein the water-based epoxy resin is standard liquid epoxy resin, and the solid content of the water-based epoxy resin is 60 percent;
wherein the solid content of triethylene tetramine is 50%.
2. Preparation of aqueous epoxy emulsified asphalt
And (3) pouring 50g of the aqueous epoxy resin emulsion into 100g of the cationic emulsified asphalt, and uniformly stirring to obtain the aqueous epoxy emulsified asphalt.
3. Preparation of micro-surfacing mix
Preparing materials according to the following weight ratio:
1000g of mineral aggregate
Bagasse fiber 3g
80g of water
Aqueous epoxy emulsified asphalt 150g
And (3) soaking the bagasse fibers in a sodium hydroxide solution with the concentration of 3-8% for 24 hours, and naturally airing to obtain saturated surface fibers.
Adding water into the uniform mixture of the alkali-treated bagasse fibers and the mineral aggregate, uniformly stirring at normal temperature, adding the aqueous epoxy resin emulsified asphalt, and continuously stirring for 60 seconds to obtain the composite material.
Wherein the mineral aggregate consists of coarse aggregate, fine aggregate and filler; the weight ratio of the coarse aggregate, the fine aggregate and the filler is 20:60: 10; the nominal grain size of the coarse aggregate is that delta is more than 4.75mm and less than or equal to 9.5 mm; the nominal grain size of the fine aggregate is that delta is less than or equal to 4.75 mm; the nominal particle size of the filler is delta less than or equal to 0.075 mm.
Example 3
1. Preparation of aqueous epoxy resin emulsion
And (3) mixing 20g of waterborne epoxy resin and 40g of polyamide, and fully stirring the mixed emulsion for 10 minutes by using a low-speed stirrer to ensure that the mixture is uniform and consistent to obtain the polyamide emulsion.
Wherein the water-based epoxy resin is standard liquid epoxy resin, and the solid content of the water-based epoxy resin is 100 percent;
wherein the polyamide has a solids content of 60%.
2. Preparation of aqueous epoxy emulsified asphalt
And pouring 60g of the aqueous epoxy resin emulsion into 150g of the cationic emulsified asphalt, and uniformly stirring to obtain the aqueous epoxy emulsified asphalt.
3. Preparation of micro-surfacing mix
Preparing materials according to the following weight ratio:
1000g of mineral aggregate
Bagasse fiber 4g
100g of water
120g of aqueous epoxy emulsified asphalt
And (3) soaking the bagasse fibers in a sodium hydroxide solution with the concentration of 3-8% for 24 hours, and naturally airing to obtain saturated surface fibers.
Adding water into the uniform mixture of the alkali-treated bagasse fibers and the mineral aggregate, uniformly stirring at normal temperature, adding the aqueous epoxy resin emulsified asphalt, and continuously stirring for 60 seconds to obtain the composite material.
Wherein the mineral aggregate consists of coarse aggregate, fine aggregate and filler; the weight ratio of the coarse aggregate to the fine aggregate to the filler is 20:60: 10; the nominal grain size of the coarse aggregate is that delta is more than 4.75mm and less than or equal to 9.5 mm; the nominal grain size of the fine aggregate is that delta is less than or equal to 4.75 mm; the nominal particle size of the filler is delta less than or equal to 0.075 mm.
Example 4
1. Preparation of aqueous epoxy resin emulsion
And (3) mixing 20g of waterborne epoxy resin and 40g of polyamide, and fully stirring the mixed emulsion for 10 minutes by using a low-speed stirrer to ensure that the mixture is uniform and consistent to obtain the polyamide emulsion.
Wherein the water-based epoxy resin is standard liquid epoxy resin, and the solid content of the water-based epoxy resin is 100 percent;
wherein the polyamide has a solids content of 60%.
2. Preparation of micro-surfacing mix
Preparing materials according to the following weight ratio:
1000g of mineral aggregate
20g of cement
Bagasse fiber 4g
100g of water
10g of aqueous epoxy resin emulsion
150g of cation emulsified asphalt
And (3) soaking the bagasse fibers in a sodium hydroxide solution with the concentration of 3-8% for 24h, and naturally airing to obtain saturated surface dry fibers.
Adding water into the uniform mixture of the alkali-treated bagasse fibers and the mineral aggregate, uniformly stirring at normal temperature, adding the aqueous epoxy resin emulsion and the emulsified asphalt, and continuously stirring for 120s to obtain the composite material.
Wherein the mineral aggregate consists of coarse aggregate, fine aggregate and filler; the weight ratio of the coarse aggregate to the fine aggregate to the filler is 20:60: 10; the nominal grain size of the coarse aggregate is that delta is more than 4.75mm and less than or equal to 9.5 mm; the nominal grain size of the fine aggregate is that delta is less than or equal to 4.75 mm; the nominal particle size of the filler is that delta is less than or equal to 0.075 mm.
Example 5
1. Preparation of aqueous epoxy resin emulsion
And (3) mixing 50g of water-based epoxy resin and 100g of diethylenetriamine, and fully stirring the mixed emulsion for 10 minutes by using a low-speed stirrer to ensure that the mixture is uniform and consistent to obtain the epoxy resin emulsion.
Wherein the water-based epoxy resin is standard liquid epoxy resin, and the solid content of the water-based epoxy resin is 70 percent;
wherein the solid content of the diethylenetriamine is 50 percent.
2. Preparation of micro-surfacing mix
Preparing materials according to the following weight ratio:
1000g of mineral aggregate
Limestone mineral powder 20g
Bagasse fiber 2g
100g of water
50g of aqueous epoxy resin emulsion
Cationic emulsified asphalt 100g
And (3) soaking the bagasse fibers in a sodium hydroxide solution with the concentration of 3-8% for 24h, and naturally airing to obtain saturated surface dry fibers.
Adding water into the uniform mixture of the alkali-treated bagasse fibers and the mineral aggregate, uniformly stirring at normal temperature, adding the aqueous epoxy resin emulsion and the emulsified asphalt, and continuously stirring for 120s to obtain the composite material.
Wherein the mineral aggregate consists of coarse aggregate, fine aggregate and filler; the weight ratio of the coarse aggregate to the fine aggregate to the filler is 20:60: 10; the nominal grain size of the coarse aggregate is that delta is more than 4.75mm and less than or equal to 9.5 mm; the nominal grain size of the fine aggregate is that delta is less than or equal to 4.75 mm; the nominal particle size of the filler is delta less than or equal to 0.075 mm.
Comparative example 1
Preparing materials according to the following weight ratio:
1000g of mineral aggregate
80g of water
SBR modified emulsified asphalt 170g
Wherein the content of SBR accounts for 4 percent of the emulsified asphalt, and the solid content of the SBR modified emulsified asphalt is 50 percent.
Adding water into the mineral aggregate, stirring into a uniform mixture, adding the SBR modified emulsified asphalt, and continuously stirring for 100s to obtain the asphalt.
Wherein the mineral aggregate consists of coarse aggregate, fine aggregate and filler; the weight ratio of the coarse aggregate, the fine aggregate and the filler is 20:60: 10; the nominal grain size of the coarse aggregate is that delta is more than 4.75mm and less than or equal to 9.5 mm; the nominal grain size of the fine aggregate is that delta is less than or equal to 4.75 mm; the nominal particle size of the filler is delta less than or equal to 0.075 mm.
Test example 1 measurement of abrasion resistance
The abrasion performance of the micro-surfacing is evaluated by adopting the abrasion value of the 1h wet wheel, and the smaller the abrasion value of the 1h wet wheel is, the better the abrasion resistance is. The determination method is JTG E20-2011 road engineering asphalt and asphalt mixture test regulation T0752-2011, and the test results are shown in Table 1.
As is clear from Table 1, the wear resistance of the inventive micro-surfacing compound is significantly improved as compared with that of comparative example 1, and the 1h wet wheel wear value thereof is less than half that of comparative example 1.
Test example 2 measurement of Water loss resistance
The abrasion resistance of the micro-surfacing is evaluated by adopting a 6d wet wheel abrasion value, the smaller the 6d wet wheel abrasion value is, the better the abrasion resistance is, the determination method is JTG E20-2011 test procedure for road engineering asphalt and asphalt mixtures T0752-2011, and the test result is shown in Table 1.
As can be seen from Table 1, the water loss resistance of the micro-surfacing mixture of the invention is significantly improved compared with that of comparative example 1, and the abrasion value of the 1h wet wheel of the invention is reduced by more than 25% compared with that of comparative example 1.
Test example 3 determination of anti-rutting Properties
The micro-surfacing anti-rutting performance is evaluated by adopting the width deformation rate in a rutting deformation test, the lower the rutting deformation rate is, the better the rutting resistance is, the measurement method is JTG E20-2011 test procedure for road engineering asphalt and asphalt mixture TO756-2011, and the test result is shown in Table 1.
As can be seen from Table 1, the micro-surfacing compound of the present invention has a lower rutting deformation rate than comparative example 1, wherein example 4 has the best effect, and the rutting deformation rate is reduced by 34.61% compared with comparative example 1.
TABLE 1 micro-surfacing results
Claims (10)
1. The plant fiber reinforced epoxy emulsified asphalt micro-surfacing mixture is characterized by comprising the following components in parts by mass: 100 parts of mineral aggregate, 10-16 parts of cationic emulsifier, 0.5-14 parts of waterborne epoxy resin emulsion, 8-15 parts of water and 0.4-0.6 part of sugarcane plant fiber.
2. The plant fiber reinforced epoxy emulsified asphalt micro-surfacing mixture according to claim 1, further comprising an additive, wherein the mass ratio of the mineral aggregate to the additive is 100:2-4, and the additive is one or more of cement, limestone mineral powder, slaked lime and fiber.
3. The plant fiber reinforced epoxy emulsified asphalt micro-surfacing mixture according to claim 1, wherein the mineral aggregate is composed of coarse aggregate, fine aggregate and filler; the weight ratio of the coarse aggregate to the fine aggregate to the filler is 0-30:55-95: 5-15; the nominal grain diameter of the coarse aggregate is 4.75mm-9.5 mm; the nominal grain size of the fine aggregate is less than or equal to 4.75 mm; the nominal grain size of the filler is less than or equal to 0.075 mm.
4. The plant fiber reinforced epoxy emulsified asphalt micro-surfacing mixture according to claim 1, wherein the aqueous epoxy resin emulsion is a mixed emulsion of aqueous epoxy resin and an aqueous epoxy curing agent, and the mass ratio of the aqueous epoxy resin to the aqueous epoxy curing agent is 1: 4.
5. The vegetable fiber reinforced epoxy emulsified asphalt micro-surfacing mixture according to claim 4, wherein the aqueous epoxy resin is an aqueous emulsion of epoxy resin, and the solid content is 50-60%.
6. The vegetable fiber reinforced epoxy emulsified asphalt micro-surfacing mixture according to claim 4, wherein the aqueous epoxy resin curing agent is a polyethylene polyamine curing agent emulsion with a solid content of 50-70%.
7. The plant fiber reinforced epoxy emulsified asphalt micro-surfacing mixture according to claim 6, wherein the sugarcane plant fiber is saturated surface dry fiber obtained by soaking bagasse fiber in 3-8% sodium hydroxide solution for 24h and naturally drying.
8. The method for preparing the plant fiber reinforced epoxy emulsified asphalt micro-surfacing mixture according to any one of claims 1 to7, which is characterized by comprising the following steps:
step 1: preparing a material;
step 2: mixing the aqueous epoxy resin emulsion and the cationic emulsified asphalt, and uniformly stirring to obtain aqueous epoxy resin modified emulsified asphalt for later use;
and step 3: mixing and stirring the mineral aggregate and the bagasse fiber uniformly;
and 4, step 4: adding water into the mixture of the mineral aggregate and the bagasse fibers and uniformly stirring
And 5: and (3) adding the waterborne epoxy resin modified emulsified asphalt prepared in the step (2) into the mixture obtained in the step (4), uniformly stirring, and maintaining at normal temperature for 24 hours to obtain the vegetable fiber reinforced waterborne epoxy resin emulsified asphalt micro-surfacing mixture.
9. The method for preparing a micro-surfacing plant fiber reinforced epoxy emulsified asphalt mixture according to claim 8, wherein the stirring time in the step 5 is 30s-120 s.
10. The method for preparing the plant fiber reinforced epoxy emulsified asphalt micro-surfacing mixture according to claim 8, wherein the aqueous epoxy resin emulsion is prepared by mixing and stirring aqueous epoxy resin and an aqueous epoxy curing agent, the weight ratio of the aqueous epoxy resin to the aqueous epoxy curing agent to water is 1:4:5, and the stirring time is 5-10 min.
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| CN116589866A (en) * | 2023-06-08 | 2023-08-15 | 华东理工大学 | Waterborne epoxy compound reed straw modified emulsified asphalt and preparation method and application thereof |
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