CN113248935B - Reactive liquid asphalt, preparation method and application thereof, water reactive normal-temperature asphalt mixture and preparation method thereof - Google Patents
Reactive liquid asphalt, preparation method and application thereof, water reactive normal-temperature asphalt mixture and preparation method thereof Download PDFInfo
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- CN113248935B CN113248935B CN202110532139.0A CN202110532139A CN113248935B CN 113248935 B CN113248935 B CN 113248935B CN 202110532139 A CN202110532139 A CN 202110532139A CN 113248935 B CN113248935 B CN 113248935B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, 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
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/04—Portland 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
- C04B2111/00474—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
- 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
Abstract
The invention belongs to the field of road building materials and engineering, and particularly relates to reactive liquid asphalt, a preparation method and application thereof, a water-reactive normal-temperature asphalt mixture and a preparation method thereof. The reactive liquid asphalt provided by the invention has good fluidity at normal temperature, can quickly release the viscosity of asphalt under the action of a curing agent and water, and simultaneously, the product generated by the reaction can increase the toughness of the asphalt, and the early strength and durability of the mixture are greatly improved when the water reactive normal temperature asphalt mixture is prepared by using the reactive liquid asphalt. In addition, the invention adopts compact grading, the void ratio is less than 3%, the compactness of the water reaction type normal temperature asphalt mixture is ensured, the influence of environmental factors such as sunlight and the like on the asphalt pavement can be avoided, and the asphalt mixture has a thicker asphalt oil film by adopting the asphalt-stone ratio higher than that of the traditional asphalt mixture, so that the anti-seepage performance of the asphalt pavement is improved, and the durability of the asphalt pavement is improved.
Description
Technical Field
The invention belongs to the field of road building materials and engineering, and particularly relates to reactive liquid asphalt, a preparation method and application thereof, a water-reactive normal-temperature asphalt mixture and a preparation method thereof.
Background
Most of traditional asphalt mixtures are common hot-mix asphalt mixtures, and the mixing temperature is usually about 160 ℃, which can cause the consumption of a large amount of energy sources such as fuel oil and the like during production and construction and the emission of a large amount of waste gases such as carbon dioxide and the like. The construction temperature range of the warm-mixed asphalt mixture is 110-130 ℃, and although the mixing temperature is reduced and the energy consumption and the gas emission are reduced to a certain extent, the construction temperature is still higher.
The normal-temperature asphalt mixture (namely the cold-mix asphalt mixture) can meet the requirements of green and low carbon when used at normal temperature. At present, the common normal temperature asphalt mixture mainly comprises three types of petroleum solvents, emulsified asphalt and bi-component resin reaction. The strength of the petroleum solvent type normal-temperature asphalt mixture mainly depends on volatilization of additives such as a petroleum solvent, and the like, so that the normal-temperature asphalt mixture is low in initial strength, slow in strength increase and poor in durability. The demulsification of the emulsified asphalt in the emulsified asphalt normal-temperature asphalt mixture needs a certain time, and is greatly influenced by the environmental temperature and humidity, so that the initial strength is low, the strength development is slow, and the adhesion of the emulsified asphalt is influenced by the residual emulsifier on the interface of the asphalt and the aggregate. Therefore, the conventional normal temperature asphalt mixture has problems of insufficient early strength and poor durability.
Disclosure of Invention
The invention aims to provide reactive liquid asphalt, and a water reactive normal-temperature asphalt mixture prepared from the reactive liquid asphalt has good early strength and durability.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides reactive liquid asphalt which comprises the following components in parts by mass: 30-75 parts of asphalt, 25-70 parts of reactive diluent, 5-10 parts of toughening agent and 1-3 parts of coupling agent.
Preferably, the asphalt comprises base asphalt, SBS modified asphalt or decolorized asphalt; the reactive diluent comprises one or more of cashew nut shell oil, soybean oil, coconut oil, olive oil, nut oil, peanut oil and tall oil.
Preferably, the toughening agent comprises a maleic anhydride modified liquid polybutadiene rubber and/or a liquid polyisoprene rubber.
Preferably, the coupling agent comprises a silane coupling agent; the silane coupling agent comprises glycidoxypropyltrimethoxysilane or aminopropyltriethoxysilane.
The invention also provides a preparation method of the reactive liquid asphalt in the technical scheme, which comprises the following steps:
controlling the temperature of the asphalt and the reactive diluent, mixing the asphalt and the reactive diluent, and then shearing for the first time to obtain a first mixed material;
carrying out first oven development on the first mixed material, and then adding a toughening agent and a coupling agent to obtain a second mixed material;
and sequentially carrying out secondary shearing and secondary oven development on the second mixed material to obtain the reactive liquid asphalt.
The invention also provides application of the reactive liquid asphalt in the technical scheme or the reactive liquid asphalt prepared by the preparation method in the technical scheme in a water reactive normal-temperature asphalt mixture.
The invention also provides a water reaction type normal temperature asphalt mixture, which comprises mineral aggregate, a curing agent and reaction type liquid asphalt; the mass ratio of the mineral aggregate to the curing agent to the reactive liquid asphalt is (96-99): (1-4) 6.0-8.0; the grading of the mineral aggregate of the reactive liquid asphalt is compact grading.
Preferably, the gradation of the mineral aggregate comprises AC-10, AC-13, AC-16 or EA-10.
Preferably, the curing agent comprises ordinary portland cement, or sulphoaluminate cement.
The invention also provides a preparation method of the water reaction type normal temperature asphalt mixture, which comprises the following steps:
respectively heating the mineral aggregate and the curing agent, and mixing and stirring the heated mineral aggregate and the curing agent with the reactive liquid asphalt to obtain a water reactive normal-temperature asphalt mixture;
the mass ratio of the mineral aggregate to the curing agent to the reactive liquid asphalt is (96-99): (1-4) 6.0-8.0;
the reactive liquid asphalt comprises asphalt, a reactive diluent, a toughening agent and a coupling agent;
the grading of the mineral aggregate is compact grading.
The invention provides reactive liquid asphalt which comprises the following components in parts by mass: 30-75 parts of asphalt, 25-70 parts of reactive diluent, 5-10 parts of toughening agent and 1-3 parts of coupling agent. The reaction type diluent in the reaction type liquid asphalt provided by the invention and the hydration product of the curing agent are subjected to esterification reaction, so that the viscosity of the asphalt is released, the asphalt is ensured to be in a flowing state at normal temperature, and meanwhile, the early strength of the asphalt mixture can be increased by the product of the esterification reaction; the toughening agent is easy to mix with organic compounds such as asphalt, a coupling agent and the like, has good elasticity at low temperature, and can generate a bridging reaction between an activated functional group and hydration products of the coupling agent and a curing agent to form a net structure so as to enhance the toughness of the asphalt; the coupling agent has excellent lubricity, can enhance the softness of the asphalt and improve the compatibility of the asphalt and the asphalt, the components enable the reactive liquid asphalt to have good fluidity at normal temperature, and the reactive liquid asphalt is subjected to chemical reaction under the action of a curing agent and water in the using process to release the viscosity of the asphalt.
The invention also provides a water reaction type normal temperature asphalt mixture, which comprises mineral aggregate, a curing agent and reaction type liquid asphalt; the mass ratio of the mineral aggregate to the curing agent to the reactive liquid asphalt is (96-99): (1-4) 6.0-8.0; the grading of the mineral aggregate of the reactive liquid asphalt is compact grading. The mass ratio of the mineral aggregate to the reactive liquid asphalt is (96-99): (6.0-8.0), which is higher than the asphalt-stone ratio of the traditional asphalt mixture (the mass ratio of mineral aggregate to asphalt is 100:5), so that the asphalt mixture has a thicker oil film, the anti-seepage performance of the asphalt pavement is improved, and the durability of the asphalt pavement is improved. The invention adopts compact grading, the void ratio is less than 3%, the compactness of the mixture is ensured, the influence of environmental factors such as sunlight on the asphalt pavement can be avoided, and the durability of the asphalt pavement is improved. The results of the examples show that the asphalt pavement prepared from the water reaction type normal temperature asphalt mixture provided by the invention has the advantages of fast strength increase, high strength, initial Marshall strength of more than 6KN, Marshall final strength of close to that of a hot-mix asphalt mixture, Marshall strength (3d age) of more than 8KN, and improvement of more than 10 times compared with the traditional petroleum solvent type cold-mix materials; the dynamic stability can reach 6000 times/mm, and the high-temperature stability is obviously superior to that of a hot-mix asphalt mixture; the kentucky scattering index is less than or equal to 12 percent, the residual stability index is more than or equal to 85 percent, and the kentucky scattering resistance and the water stability are excellent, so that the asphalt pavement has excellent durability.
In addition, the water-reactive normal-temperature asphalt mixture provided by the invention needs water for strength formation, can be operated with water, ensures the timeliness of repairing pits on asphalt pavements in rainy days, and provides a solution for construction of asphalt pavements with water accumulated throughout the year or in closed spaces. Meanwhile, the invention does not contain petroleum solvents such as diesel oil and the like, and is green and environment-friendly. Moreover, the water reaction type normal temperature asphalt mixture provided by the invention adopts various sealing package designs with different specifications, and is not only suitable for emergency maintenance of asphalt pavements, but also suitable for major and medium maintenance projects of asphalt pavements.
Detailed Description
The invention provides reactive liquid asphalt which comprises the following components in parts by mass: 30-75 parts of asphalt, 25-70 parts of reactive diluent, 5-10 parts of toughening agent and 1-3 parts of coupling agent.
In the present invention, the required raw materials are all commercially available products well known to those skilled in the art, unless otherwise specified.
In the invention, the reactive liquid asphalt preferably comprises 30-75 parts by mass of asphalt, more preferably 45-70 parts by mass of asphalt, the asphalt preferably comprises base asphalt, SBS modified asphalt or decolored asphalt, and the base asphalt is preferably No. 70 asphalt; the SBS modified asphalt is preferably I-D type SBS modified asphalt.
The reactive liquid asphalt preferably comprises 25-70 parts by weight of reactive diluent, and more preferably 31-50 parts by weight of asphalt. In the present invention, the reactive diluent preferably includes one or more of cashew nut shell oil, soybean oil, coconut oil, olive oil, nut oil, peanut oil and tall oil, and more preferably cashew nut shell oil or soybean oil. When the reactive diluent is preferably selected from the above-mentioned ones, the ratio of the reactive diluent of different types is not particularly limited, and any ratio may be used. The strength of the asphalt mixture depends on the cementing power of the asphalt and the embedding and squeezing effect between mineral aggregates, the asphalt is solid and has high viscosity at normal temperature, the asphalt is liquid at the temperature of over 140 ℃ and has low viscosity, and the liquid asphalt of the traditional petroleum solvent type normal-temperature asphalt mixture releases the viscosity of the asphalt after the petroleum solvent (diluent) volatilizes. The reactive diluent can ensure that a product of the curing agent after hydration is subjected to esterification reaction to release the viscosity of the asphalt and is in a flowing state at normal temperature, meanwhile, the early strength of the asphalt mixture can be increased by the product of the esterification reaction, the viscosity of the asphalt is released by the reactive diluent through chemical reaction, and the chemical reaction speed is higher than the volatilization speed of a petroleum solvent depending on the volatilization speed of the petroleum solvent, so that the strength of the asphalt mixture is increased quickly, and the product generated by the chemical reaction can increase the toughness of the asphalt, so that the water-reactive normal-temperature asphalt mixture provided by the invention has high early strength and durability.
Based on the mass parts of the asphalt, the reactive liquid asphalt preferably comprises 5-10 parts of a toughening agent, and more preferably 7-10 parts. In the present invention, the toughening agent preferably includes a maleic anhydride-modified liquid polybutadiene rubber and/or a liquid polyisoprene rubber. When the toughening agent is preferably maleic anhydride modified liquid polybutadiene rubber and liquid polyisoprene rubber, the proportion of the maleic anhydride modified liquid polybutadiene rubber and the liquid polyisoprene rubber is not particularly limited and can be any proportion. In the invention, the liquid polyisoprene rubber is a low molecular weight liquid polymer taking isoprene as a chain link structure, is viscous at room temperature, has fluidity and has an active functional group; the maleic anhydride modified liquid polybutadiene rubber is an adduct of low molecular weight 1,4 cis polybutadiene and maleic anhydride, and anhydride groups are randomly distributed on a polymer main chain, so that nonpolar polybutadiene can be polarized, and active groups participate in some chemical reactions. The toughening agent is easy to mix with organic compounds such as asphalt, a coupling agent and the like, has good elasticity at low temperature, and can generate a bridging reaction between an activated functional group and a product obtained after hydration of the coupling agent and a curing agent to form a net structure, so that the toughness of the asphalt is enhanced.
The reactive liquid asphalt preferably comprises 1-3 parts by weight of a coupling agent, and more preferably 1.5-3 parts by weight of the asphalt. In the present invention, the coupling agent preferably includes a silane coupling agent; the silane coupling agent preferably comprises glycidoxypropyltrimethoxysilane or aminopropyltriethoxysilane. In the invention, the coupling agent has excellent lubricating property, can enhance the softness of the asphalt and improve the compatibility of the asphalt and the coupling agent.
In the using process, the reaction type liquid asphalt used by the invention reacts under the simultaneous action of the curing agent and water. The reactive diluent can perform esterification reaction with a product after the hydration of the curing agent, release the viscosity of the asphalt and simultaneously enhance the early strength of the asphalt mixture. The toughening agent can generate a bridging reaction with a product generated after hydration of the coupling agent and the curing agent to form a reticular polymer to enhance the toughness of the asphalt mixture, and the concrete material with preset elasticity is formed while the asphalt binding power is released through the chemical reaction. The reaction type liquid asphalt, the mineral aggregate and the curing agent are mixed to form the water reaction type normal temperature asphalt mixture, under the action of water, the reaction type liquid asphalt and the hydrated products of the curing agent react to form an elastoplastomer at normal temperature, the cementing property of the asphalt is released, and meanwhile, the early strength and the toughness of the mixture can be improved by the products formed by the reaction.
The invention also provides a preparation method of the reactive liquid asphalt, which comprises the following steps:
controlling the temperature of the asphalt and the reactive diluent, mixing the asphalt and the reactive diluent, and then shearing for the first time to obtain a first mixed material;
carrying out first oven development on the first mixed material, and then adding a toughening agent and a coupling agent to obtain a second mixed material;
and sequentially carrying out secondary shearing and secondary oven development on the second mixed material to obtain the reactive liquid asphalt.
The present invention controls the temperature of the bitumen and reactive diluent. In the invention, the temperature of the asphalt is preferably 140-170 ℃, more preferably 140-160 ℃, and the temperature of the reactive diluent is preferably 20-80 ℃, more preferably 50-80 ℃. The process of controlling the temperature of the asphalt and the reactive diluent is not particularly limited in the present invention, and a temperature control process known to those skilled in the art may be used.
After the asphalt and the reactive diluent with controlled temperature are obtained, the asphalt and the reactive diluent are mixed and then subjected to first shearing to obtain a first mixed material. In the invention, the speed of the first shearing is preferably 500-1000 r/min, and more preferably 500-800 r/min; the first shearing time is preferably 15-30 min, and more preferably 20-30 min; the temperature of the first shearing is preferably 140-160 ℃, and more preferably 140-150 ℃. The shearing process is not particularly limited in the present invention, and a shearing process known to those skilled in the art may be used.
After the first mixed material is obtained, the first mixed material is subjected to first oven development, and then a toughening agent and a coupling agent are added to obtain a second mixed material. In the invention, the temperature of the first oven development is preferably 40-80 ℃, and more preferably 50-60 ℃; the time for the first oven development is preferably 30-50 min, and more preferably 30-40 min. The process of oven development is not particularly limited in the present invention, and can be performed by an oven development process well known to those skilled in the art.
After the second mixed material is obtained, the second mixed material is subjected to second shearing and second oven development in sequence to obtain the reactive liquid asphalt. In the invention, the speed of the second shearing is preferably 400-1000 r/min, and more preferably 500-1000 r/min; the time of the second shearing is preferably 20-50 min, and more preferably 20-30 min; the temperature of the second shearing is preferably 60-100 ℃, and more preferably 60-70 ℃. In the invention, the temperature of the second oven development is preferably 40-60 ℃, and more preferably 50-60 ℃; the time for the second oven development is preferably 20-50 min, and more preferably 20-30 min.
The invention also provides application of the reactive liquid asphalt in the technical scheme or the reactive liquid asphalt prepared by the preparation method in the technical scheme in a water reactive normal-temperature asphalt mixture.
The invention also provides a water reaction type normal temperature asphalt mixture, which comprises mineral aggregate, a curing agent and reaction type liquid asphalt; the mass ratio of the mineral aggregate to the curing agent to the reactive liquid asphalt is (96-99): (1-4) 6.0-8.0; the grading of the mineral aggregate is compact grading.
The water reaction type normal temperature asphalt mixture provided by the invention comprises mineral aggregate. In the invention, the grading of the mineral aggregate is compact grading, and the grading of the mineral aggregate preferably comprises AC-10, AC-13, AC-16 or EA-10, and is specifically shown in Table 1. The concrete type of the mineral aggregate is not particularly limited in the invention, and the mineral aggregate which is well known in the field and meets the grading requirement can be selected. In the present invention, the gradation of the mineral aggregate should reach or approach the median gradation value.
TABLE 1 gradation of mineral aggregates in water-reactive normal-temperature bituminous mixtures
In the present invention, the technical requirements of the mineral aggregate preferably satisfy the technical Specification for Highway asphalt pavement construction (JTGF 40-2004). The invention adopts compact grading to ensure the compactness of the mixture, can avoid the influence of environmental factors such as sunlight and the like on the asphalt pavement and improve the durability of the asphalt pavement.
The water reaction type normal temperature asphalt mixture provided by the invention comprises a curing agent, wherein the mass ratio of the mineral aggregate to the curing agent is (96-99): (1-4), more preferably (97.0-98.5): (1.5 to 3). In the present invention, the curing agent preferably includes ordinary portland cement, and sulphoaluminate cement, and more preferably ordinary portland cement of 32.5 grade or more. In the invention, the hydration product of the curing agent and the reactive diluent are subjected to esterification reaction, the asphalt viscosity is released, the obtained esterification product can increase the strength of the mixture, meanwhile, calcium silicate compounds generated by silicon and calcium in the curing agent components under the action of water are substances playing a main strength role in concrete, and then, under the alkaline environment provided by the coupling agent and the curing agent, the toughening agent and the hydration product of the curing agent are subjected to bridging reaction to form a net structure, thereby toughening the asphalt.
The water reaction type normal temperature asphalt mixture provided by the invention comprises reaction type liquid asphalt, wherein the mass ratio of mineral aggregate to the reaction type liquid asphalt is (96-99): (6.0-8.0), more preferably (98.2-98.8): (6.2-7.2). The asphalt-asphalt mixture has a thicker asphalt oil film and the anti-seepage performance of the asphalt pavement is improved by adopting the asphalt-stone ratio (the mass ratio of the mineral aggregate to the asphalt is 100:5) higher than that of the traditional asphalt mixture, so that the durability of the asphalt pavement is improved.
The invention also provides a preparation method of the water reaction type normal temperature asphalt mixture, which comprises the following steps:
respectively heating the mineral aggregate and the curing agent, and mixing and stirring the heated mineral aggregate and the curing agent with the reactive liquid asphalt to obtain a water reactive normal-temperature asphalt mixture;
the mass ratio of the mineral aggregate to the curing agent to the reactive liquid asphalt is (96-99): (1-4) 6.0-8.0;
the reactive liquid asphalt comprises asphalt, a reactive diluent, a toughening agent and a coupling agent;
the grading of the mineral aggregate is compact grading.
The invention heats the mineral aggregate and the curing agent respectively. In the invention, the heating temperature is independently preferably 100-130 ℃, and more preferably 100-120 ℃. The heating method of the present invention is not particularly limited, and a heating method known to those skilled in the art may be used.
The method mixes and stirs the heated mineral aggregate and curing agent with the reactive liquid asphalt to obtain the water reactive normal temperature asphalt mixture.
In the present invention, the mixing order of the heated mineral aggregate, the curing agent and the water-reactive liquid asphalt is preferably such that the reactive liquid asphalt is added to the heated mineral aggregate and stirred, and the heated curing agent is added and stirred.
In the invention, the mixing and stirring temperature is preferably 20-120 ℃, more preferably 100-110 ℃, the mixing and stirring time is preferably 45-75 s, more preferably 50-75 s, and the mixing and stirring speed is preferably 40-60 r/min, more preferably 40-55 r/min.
The water reaction type normal temperature asphalt mixture is preferably filled into a sealing bag for storage. In order to facilitate packing, the discharging temperature of the water reaction type normal temperature asphalt mixture is preferably controlled to be not more than 130 ℃. The water reaction type normal temperature asphalt mixture prepared by the invention can be stored for 6 months under a sealed condition.
The application method of the water reaction type normal-temperature asphalt mixture provided by the invention is preferably to uniformly spray a proper amount of water on the water reaction type normal-temperature asphalt mixture and then compact the water reaction type normal-temperature asphalt mixture. The concrete using method comprises the steps of repairing a pit groove of the asphalt pavement by using the water reaction type normal-temperature asphalt mixture, cleaning the pit groove, pouring a proper amount of the water reaction type normal-temperature asphalt mixture which is hermetically stored into the pit groove, uniformly spraying a proper amount of water on the water reaction type normal-temperature asphalt mixture, and compacting the water reaction type normal-temperature asphalt mixture by a road roller or a tamping plate. In the invention, the using amount of the water is preferably 2.5-4L/25 kg (water reaction type normal temperature asphalt mixture). The water reaction type normal temperature asphalt mixture provided by the invention is promoted by water to generate chemical reaction to quickly form early strength.
In order to further illustrate the present invention, the following will describe the water-reactive normal temperature asphalt mixture and the preparation method thereof in detail with reference to the examples, but they should not be construed as limiting the scope of the present invention.
Example 1
(1) Mixing 70# asphalt 6kg, cashew nut shell oil 3.1kg, liquid polybutadiene rubber 0.7kg modified by maleic anhydride and glycidoxypropyltrimethoxysilane 0.2kg (mass ratio of 60:31:7:2), controlling the temperature of 70# asphalt at 150 ℃ and the temperature of cashew nut shell oil at 60 ℃, and carrying out first shearing on 70# asphalt and cashew nut shell oil at 140 ℃, wherein the first shearing speed is 700r/min and the first shearing time is 20min to obtain a first mixed material; carrying out first oven development on the first mixed material, wherein the time of the first oven development is 30min, the temperature of the first oven development is 60 ℃, then adding maleic anhydride modified liquid polybutadiene rubber and glycidoxypropyltrimethoxysilane, and carrying out second shearing at the temperature of 60 ℃, wherein the speed of the second shearing is 600r/min, and the time of the second shearing is 30min, so as to obtain a second mixed material; performing secondary oven development on the second mixed material, wherein the time of the secondary oven development is 30min, and the temperature of the secondary oven development is 60 ℃, so as to obtain reactive liquid asphalt;
(2) 19.7kg of mineral aggregate (AC-10 grade composition median), 0.3kg of ordinary portland cement (32.5 grade) and 1.34kg of reactive liquid asphalt (mass ratio is 98.5:1.5:6.7) are mixed, the mineral aggregate (AC-10) and the ordinary portland cement are heated to 110 ℃, and then the heated mineral aggregate (AC-10), the ordinary portland cement and the reactive liquid asphalt are mixed and stirred for 50s at 105 ℃ with the stirring speed of 40r/min to obtain a water reactive normal-temperature asphalt mixture, and the mixture is filled into a sealing bag for storage.
Example 2
(1) 5kg of 70# asphalt, 4kg of soybean oil, 0.85kg of maleic anhydride modified liquid polybutadiene rubber and 0.15kg of glycidoxypropyltrimethoxysilane (mass ratio of 50:40:8.5:1.5) are mixed, the temperature of 70# asphalt is controlled to be 160 ℃, the temperature of soybean oil is controlled to be 50 ℃, 70# asphalt and soybean oil are subjected to first shearing at 150 ℃, the first shearing speed is 600r/min, and the first shearing time is 30min, so that a first mixed material is obtained. And (3) carrying out first oven development on the first mixed material, wherein the first oven development time is 40min, the first oven development temperature is 50 ℃, then adding the maleic anhydride modified liquid polybutadiene rubber and the glycidoxypropyltrimethoxysilane, and carrying out second shearing at the temperature of 70 ℃, wherein the second shearing speed is 500r/min, and the second shearing time is 20min, thus obtaining a second mixed material. And (3) carrying out secondary oven development on the second mixed material, wherein the time of the secondary oven development is 30min, and the temperature of the secondary oven development is 50 ℃, so as to obtain the reactive liquid asphalt.
(2) Mixing 24.7kg of mineral aggregate (AC-13 grading median), 0.3kg of Portland cement and 1.625kg of reactive liquid asphalt (mass ratio is 98.8:1.2:6.5), heating the mineral aggregate (AC-13) and the Portland cement to 110 ℃, mixing and stirring the heated mineral aggregate (AC-13), the Portland cement and the reactive liquid asphalt at 100 ℃ for 60s at the stirring speed of 50r/min to obtain a water reactive normal-temperature asphalt mixture, and filling the mixture into a sealed bag for storage.
Example 3
(1) Mixing 4.5kgI-D type SBS modified asphalt, 4.5kg cashew nut shell oil, 0.8kg liquid polyisoprene rubber and 0.2kg aminopropyltriethoxysilane (in a mass ratio of 45:45:8:2), controlling the temperature of the I-D type SBS modified asphalt to be 160 ℃ and the temperature of the cashew nut shell oil to be 70 ℃, and carrying out first shearing on the I-D type SBS modified asphalt and the cashew nut shell oil at 150 ℃, wherein the first shearing speed is 800r/min and the first shearing time is 30min to obtain a first mixed material. And (3) carrying out first oven development on the first mixed material, wherein the first oven development time is 30min, the first oven development temperature is 60 ℃, then adding liquid polyisoprene rubber and aminopropyltriethoxysilane, and carrying out second shearing at the temperature of 60 ℃, wherein the second shearing speed is 1000r/min, and the second shearing time is 30min, so as to obtain a second mixed material. And (3) carrying out secondary oven development on the second mixed material, wherein the time of the secondary oven development is 20min, and the temperature of the secondary oven development is 60 ℃, so as to obtain the reactive liquid asphalt.
(2) Mixing 24.55kg of mineral aggregate (AC-16 grade median), 0.45kg of ordinary portland cement (32.5 grade) and 1.55kg of reactive liquid asphalt (mass ratio is 98.2:1.8:6.2), heating the mineral aggregate (AC-16) and the ordinary portland cement to 110 ℃, mixing and stirring the heated mineral aggregate (AC-16), the ordinary portland cement and the reactive liquid asphalt at 110 ℃ for 75s at the stirring speed of 50r/min to obtain a water reactive normal-temperature asphalt mixture, and directly filling the mixture into a sealing bag for storage.
Example 4
(1) Mixing 7kg of 70# asphalt, 5kg of cashew nut shell oil, 1kg of liquid polyisoprene rubber and 0.3kg of glycidoxypropyltrimethoxysilane (the mass ratio is 70:50:10:3), controlling the temperature of the 70# asphalt to be 140 ℃ and the temperature of the cashew nut shell oil to be 80 ℃, and carrying out first shearing on the 70# asphalt and the cashew nut shell oil at 130 ℃, wherein the first shearing speed is 500r/min, and the first shearing time is 30min to obtain a first mixed material. And (3) carrying out first oven development on the first mixed material, wherein the time of the first oven development is 40min, the temperature of the first oven development is 60 ℃, then adding liquid polyisoprene rubber and glycidoxypropyltrimethoxysilane, and carrying out second shearing at the temperature of 60 ℃, wherein the speed of the second shearing is 500r/min, and the time of the second shearing is 30min, thus obtaining a second mixed material. And (3) carrying out secondary oven development on the second mixed material, wherein the time of the secondary oven development is 25min, and the temperature of the secondary oven development is 60 ℃, so as to obtain the reactive liquid asphalt.
(2) Mixing 19.7kg of mineral aggregate (EA-10 grade composition median), 0.3kg of ordinary portland cement (32.5 grade) and 1.44kg of reactive liquid asphalt according to the mass ratio of 98.5:1.5:7.2, heating the mineral aggregate (EA-10) and the ordinary portland cement to 115 ℃, mixing and stirring the heated mineral aggregate (AC-10), the ordinary portland cement and the reactive liquid asphalt at 110 ℃ for 60s at the stirring speed of 55r/min to obtain a water reactive normal-temperature asphalt mixture, and directly filling the mixture into a sealing bag for storage.
Comparative example 1
The reaction type liquid asphalt in the example 1 is replaced by SBS modified asphalt SMA-13 to prepare the normal temperature asphalt mixture.
Comparative example 2
The mass ratio of the mineral aggregate (AC-10 grade median), the ordinary portland cement (32.5 grade) and the reactive liquid asphalt in example 1 was replaced by 98.5:1.5:5.5 to prepare a water reactive normal-temperature asphalt mixture.
Comparative example 3
The mass ratio of the mineral aggregate (AC-10 grade median), the ordinary portland cement (32.5 grade) and the reactive liquid asphalt in example 1 was replaced by 98.5:1.5:8.5 to prepare a water reactive normal-temperature asphalt mixture.
Comparative example 4
The water-reactive normal-temperature asphalt mixture is prepared by replacing all the coupling agent glycidoxypropyltrimethoxysilane in example 1 with maleic anhydride modified liquid polybutadiene rubber.
Comparative example 5
Selecting a fine grain type LB-10 grading median value (shown in a table 2) in mineral aggregate grading of a road asphalt pavement construction technical Specification (JTGF40-2004) table 8.4.2 cold patch asphalt mixture, and preparing the traditional petroleum solvent type LB-10 cold patch asphalt mixture according to the mass ratio of the traditional liquid asphalt to the mineral aggregate of 5: 100.
TABLE 2 mineral aggregate gradation of cold patch asphalt mixture
Performance testing
Referring to road engineering asphalt and asphalt mixture test procedure JTGE20-2011, samples related to water-carrying forming prepared from the normal-temperature asphalt mixtures prepared in examples 1-4 and comparative examples 1-5 were prepared, and the performance indexes of the samples prepared from the mixtures are shown in table 3.
TABLE 3 summary of test results of water-borne molded test pieces prepared in examples 1 to 4 and comparative examples 1 to 5
As can be seen from Table 3, the asphalt pavement test piece prepared from the water reaction type normal temperature asphalt mixture provided by the invention has the advantages that the strength is increased rapidly and is high, the initial Marshall strength is greater than 6KN, the Marshall final strength is close to that of the hot-mix asphalt mixture, the Marshall strength (3d age) is greater than 8KN, and compared with the traditional petroleum solvent cold-mix material in the comparative example 5, the improvement is more than 10 times; the dynamic stability can reach 6000 times/mm, and the high-temperature stability is obviously superior to that of a hot-mix asphalt mixture; the kentucky scattering index is less than or equal to 12 percent, the residual stability index is more than or equal to 85 percent, and the kentucky scattering resistance and the water stability are excellent, so that the asphalt pavement has excellent durability. The Marshall strength of the test piece prepared from the water reaction type normal temperature asphalt mixture provided by the invention is close to that of the normal temperature asphalt mixture test piece prepared from SBS modified asphalt SMA-13, and the indexes such as high temperature stability and the like of the test piece are superior to those of the normal temperature asphalt mixture test piece prepared from SBS modified asphalt SMA-13. Due to the decrease in the reactive asphalt in comparative example 2, the void ratio of the test piece was increased, and the resistance to scattering and the water stability were not satisfactory. Due to the increase of the reactive asphalt in comparative example 3, the viscosity of the asphalt was not completely released, and the strength and high temperature stability were not satisfactory. Due to the absence of the coupling agent in the comparative example 4, the toughening agent can not play a good role, and the high-temperature performance and the anti-flying performance of the test piece can not meet the requirements.
The above-described embodiments are merely preferred embodiments of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be construed as the protection scope of the present invention.
Claims (7)
1. The reactive liquid asphalt comprises the following components in parts by weight: 30-75 parts of asphalt, 25-70 parts of reactive diluent, 5-10 parts of toughening agent and 1-3 parts of coupling agent;
the asphalt comprises base asphalt, SBS modified asphalt or decolored asphalt; the reactive diluent comprises one or more of cashew nut shell oil, soybean oil, coconut oil, olive oil, nut oil, peanut oil and tall oil;
the toughening agent comprises liquid polybutadiene rubber and/or liquid polyisoprene rubber modified by maleic anhydride;
the coupling agent comprises a silane coupling agent;
the silane coupling agent comprises glycidoxypropyltrimethoxysilane or aminopropyltriethoxysilane.
2. A process for producing reactive liquid asphalt according to claim 1, comprising the steps of: controlling the temperature of the asphalt and the reactive diluent, mixing the asphalt and the reactive diluent, and then shearing for the first time to obtain a first mixed material;
carrying out first oven development on the first mixed material, and then adding a toughening agent and a coupling agent to obtain a second mixed material;
and sequentially carrying out secondary shearing and secondary oven development on the second mixed material to obtain the reactive liquid asphalt.
3. Application of the reactive liquid asphalt of claim 1 or the reactive liquid asphalt prepared by the preparation method of claim 2 in water reactive normal-temperature asphalt mixture.
4. A water reaction type normal temperature asphalt mixture is characterized by comprising mineral aggregate, a curing agent and reaction type liquid asphalt;
the mass ratio of the mineral aggregate to the curing agent to the reactive liquid asphalt is (96-99): (1-4) 6.0-8.0; the grading of the mineral aggregate is compact grading; the reactive liquid asphalt is the reactive liquid asphalt described in claim 1 or the reactive liquid asphalt prepared by the preparation method described in claim 2.
5. The water-reactive normal temperature asphalt mixture according to claim 4, wherein the gradation of the mineral aggregate comprises AC-10, AC-13, AC-16 or EA-10.
6. The water-reactive normal-temperature asphalt mixture according to claim 4, wherein the curing agent comprises ordinary portland cement, or sulphoaluminate cement.
7. The preparation method of the water-reactive normal-temperature asphalt mixture as claimed in any one of claims 4 to 6, characterized by comprising the following steps: respectively heating the mineral aggregate and the curing agent, and mixing and stirring the heated mineral aggregate and the curing agent with the reactive liquid asphalt to obtain a water reactive normal-temperature asphalt mixture;
the mass ratio of the mineral aggregate to the curing agent to the reactive liquid asphalt is (96-99): (1-4) 6.0-8.0;
the reactive liquid asphalt comprises asphalt, a reactive diluent, a toughening agent and a coupling agent; the grading of the mineral aggregate is compact grading.
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| CN113896487B (en) * | 2021-11-02 | 2023-04-25 | 长沙理工大学 | Preparation method and application of water-curing reaction type normal-temperature liquid asphalt and mixture thereof |
| CN114316505A (en) * | 2022-01-06 | 2022-04-12 | 广州市市维新材料科技有限公司 | Decolorized cold patch asphalt and preparation method thereof, reactive high-performance colored asphalt cold patch material and preparation method and use method thereof |
| CN115340770B (en) * | 2022-07-20 | 2023-10-03 | 福建科顺新材料有限公司 | Coating material for waterproof coiled material, preparation method thereof and waterproof coiled material |
| CN115159899B (en) * | 2022-08-18 | 2023-02-24 | 郑州中科新兴产业技术研究院 | Cold-mix asphalt mixture and preparation method and application thereof |
| CN116119979A (en) * | 2023-02-22 | 2023-05-16 | 招商局重庆交通科研设计院有限公司 | Ultrathin cover surface composite modified asphalt concrete and preparation method thereof |
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