CN109852079B - Novel normal-temperature asphalt modified material and preparation method and application thereof - Google Patents
Novel normal-temperature asphalt modified material and preparation method and application thereof Download PDFInfo
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Abstract
The invention relates to a novel normal-temperature asphalt modified material, a preparation method and application thereof, wherein the normal-temperature asphalt modified material is a composite material and mainly comprises the following components in percentage by mass: 5-10% of an interface binder, 84-93% of a toughening material and 2-6% of a curing agent; the interface binder is one or two of polyethylene wax and epoxy resin; the toughening material comprises polydimethylsiloxane oil and hydrogen-containing silicone oil; the curing agent is one or more of amine compounds and platinum compounds. The asphalt modified material disclosed by the invention has compatibility and dispersibility with asphalt, reduces the generation of bubbles, can be quickly cured at normal temperature or even low temperature, can be constructed under outdoor low-temperature conditions, effectively improves the construction efficiency, and also can improve the flexibility and water resistance of the asphalt. The preparation method of the asphalt modified material is simple, can be applied to asphalt mixtures, meets the requirements of road construction, and has good road performance.
Description
Technical Field
The invention relates to the technical field of road building materials, in particular to a novel normal-temperature asphalt modified material and a preparation method and application thereof.
Background
In recent years, with the development of transportation technologies, "energy-saving, low-carbon and environment-friendly" road building materials are emerging, such as asphalt mixture warm-mix agents, cold recycling modifiers, modified emulsified asphalt for cold mixing, solvent-based modifiers for cold mixing, and the like. The warm-mix modifier mainly reduces the temperature of the asphalt mixture during mixing, paving and rolling by reducing the viscosity of the asphalt mixture during rolling, so as to achieve the purposes of energy conservation and environmental protection, but the cooling effect of the warm-mix modifier in the current market is 30-40 ℃, the energy-saving effect is relatively limited, and the asphalt mixture still needs to be constructed under the high-temperature condition of more than 100 ℃; the products such as cold-mixed solvent type modifiers, emulsified asphalt cold recycling modifiers and the like are various, but the emulsified asphalt is easy to soften at high temperature, and can release gas to cause the generation of bubbles on a pavement layer, so that the pavement performance is generally poor, the emulsified asphalt is mostly used as a base layer of a low-grade highway or used for daily maintenance of asphalt pavements, such as pit and groove repair and the like, the application range is limited, and the actual application quality and the service life are to be further improved.
In addition, in foreign countries, various cold-mix cold-paving pavement materials are sequentially developed and applied to engineering by research institutions and companies represented by the SHRP plan Gogreen, Emcol corporation in England, Japan and asphalt industry Co., Ltd, and mainly aqueous medium type (emulsion) and solvent type (dilution) modifiers are used, so that the actual using effect is influenced by the using environment, construction conditions and the like, and the actual using effect is not consistent.
Chinese patent 201710357110.7 discloses a cold-mix asphalt and a preparation method and application thereof. Specifically, the cold-mixed asphalt provided by the invention comprises the following components: the asphalt-epoxy resin composite material comprises petroleum asphalt, epoxy resin, a compatilizer, an amine curing agent and an additive, wherein the compatilizer is alkylbenzene sulfonate, the additive is activated carbon loaded with surface-modified inorganic nano particles, and the mass ratio of the petroleum asphalt to the epoxy resin to the compatilizer to the amine curing agent to the additive is 100:20-40:10-15:5-10:1-5, preferably 100:25-35:10-12:6-8: 2-4. The cold-mixed asphalt provided by the invention can be applied at normal temperature, and has good anti-rutting property and water stability; meanwhile, the method has the advantage of environmental protection and has good application prospect. However, the raw materials such as asphalt and inorganic nanoparticles are difficult to disperse during the preparation of the cold-mixed asphalt, and the raw materials still need to be stirred for 1-5 hours at the temperature of 100-170 ℃ and then stirred for 1-10 minutes at the temperature of 50-100 ℃ to be uniformly dispersed, so that the manufacturing cost is greatly increased, and the toughness of the cold-mixed asphalt is not good enough.
Chinese patent 201710540037.7 provides a high-toughness cold-mix epoxy asphalt binder and a preparation method thereof. The cold-mixed epoxy asphalt binder comprises a component A and a component B, wherein the component A mainly comprises epoxy resin, a diluent and a toughening agent, and the component B mainly comprises a curing agent, asphalt, the diluent, a compatilizer and a defoaming agent. The cold-mixed epoxy asphalt binder can be mixed and constructed at normal temperature, is low-carbon and environment-friendly, and has a simple construction process. The epoxy asphalt material forms a three-dimensional network structure after being cured, and has good thermal stability and bonding strength. The branched carboxyl-terminated butadiene-acrylonitrile rubber is used as a toughening agent, so that excellent flexibility of the cured epoxy asphalt is ensured. The invention is mainly suitable for bonding and waterproofing steel bridge floors, urban viaducts, cement concrete bridge floors, tunnels, expressways and other road surfaces. Although the invention can improve the flexibility of the asphalt, the asphalt can be uniformly mixed and dispersed with other raw materials after the asphalt is heated to 110-135 ℃ and the diluent is added and stirred to be dissolved in the preparation process of the component B, the added diluent can have adverse effect on the performance of the asphalt, and the release of the diluent into the environment at high temperature can affect the human health and the environmental safety. And the preparation method of the toughening agent b-CTBN is also complex, the manufacturing cost is increased, a large amount of organic solvent is also needed to be used, and the environment is also adversely affected to a certain extent.
Therefore, the product and the technology which have better energy-saving effect than the warm-mixed asphalt modifier and better road effect than the current cold-mixed asphalt modifier are low in cost, and the development of the modified asphalt product with better strength and toughness has important significance for improving the scientific research level of the highway engineering industry in China and promoting the innovation and the regeneration of the low-carbon environment-friendly road building technology of the highway industry.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims at least solving one of the problems in the prior art, and provides a novel normal-temperature asphalt modified material which can obviously improve the heating requirement of asphalt in the construction process, reduce the pollution to air, save energy and has good strength, toughness and stability.
The purpose of the invention is realized by the following technical scheme: a novel normal-temperature asphalt modified material mainly comprises the following components in percentage by mass: 5-10% of an interface binder, 84-93% of a toughening material and 2-6% of a curing agent; the interface binder is one or two of polyethylene wax and epoxy resin; the toughening material comprises polydimethylsiloxane oil and hydrogen-containing silicone oil; the curing agent is one or more of amine compounds and platinum compounds.
The dimethyl silicone oil and the hydrogen-containing silicone oil are added into the asphalt modified material to serve as toughening materials, so that the flexibility of the asphalt can be improved, the compatibility and the dispersibility of the interface binder and the asphalt can be improved, the problem that the existing asphalt and other raw materials are difficult to disperse can be solved without adding a diluent, the generation of bubbles can be reduced, and the water resistance of the asphalt is improved. The amine and platinum compounds are used as the curing agent, so that the asphalt modified material can be cured at normal temperature, can be constructed under outdoor low-temperature conditions, and effectively improves the construction efficiency. The interfacial adhesive, the epoxy resin, the silicone oil and the curing agent are mutually matched to ensure that the asphalt modifier has high strength, high toughness and good cohesiveness.
Preferably, the viscosity of the polydimethylsiloxane oil at 25 ℃ is 20-6000 cs.
Preferably, the hydrogen content of the hydrogen-containing silicone oil is 0.1-1.5%.
Preferably, the mass ratio of the polydimethylsiloxane oil to the hydrogen-containing silicone oil is 1: 1-5: 1.
The preferable specific polydimethylsiloxane oil and the hydrogen-containing silicone oil and the proper proportion can ensure that the asphalt modified material and the matrix asphalt have better dispersibility, and the tensile strength and the elongation at break of the modified material after curing are higher.
Preferably, the epoxy resin is a liquid bisphenol a glycidyl ether type epoxy resin. The epoxy resin, other modified materials and the matrix asphalt can be quickly and uniformly dispersed at room temperature, and the cured strength is better.
Preferably, the amine curing agent is one or more of ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylene tetramine, diethylaminopropylamine and m-phenylenediamine. The curing agents and the epoxy resin can be rapidly cured at normal temperature, so that the use efficiency is improved, better strength is ensured, and the road performance is good.
Preferably, the platinum-based curing agent is chloroplatinic acid. The chloroplatinic acid can be used for quickly catalyzing the curing of the silicone oil, and has good compatibility with raw materials such as epoxy resin and the like.
Preferably, the interfacial bonding agent consists of 10-20 wt% of polyethylene wax and 80-90 wt% of epoxy resin. The combination of the two adhesives in the preferred proportion can ensure better adhesive strength.
Preferably, the curing agent consists of 85-90 wt% of amine curing agent and 10-15 wt% of platinum curing agent. The combination of the two curing agents with the optimal proportion can enable the epoxy resin and the silicone oil in the asphalt modified material to be cured more quickly, improve the construction efficiency and reduce the cost.
The invention also provides a preparation method of the novel normal-temperature asphalt modified material, which comprises the following steps:
(1) weighing the components of the interface binder and the toughening material according to a certain proportion;
(2) the interface adhesive and the toughening material components are put into a mixing device to be mixed to form a composite material;
the composite material and the curing agent jointly form the novel normal-temperature asphalt modified material.
The invention also provides the application of the novel normal temperature asphalt modified material in modified asphalt mixture,
directly adding a composite material formed by a binder and a toughening material into matrix asphalt to prepare modified asphalt;
directly adding modified asphalt into mineral aggregate with certain gradation, and adding a curing agent in the stirring and mixing process to form a normal-temperature modified asphalt mixture;
the mixing mass ratio of the novel normal-temperature asphalt modified material to the matrix asphalt is 1: 1-1.5: 1.
The novel normal-temperature asphalt modified material can be prepared at normal temperature, the preparation method is simple, the modified asphalt modified material can be uniformly dispersed with matrix asphalt at lower temperature when being applied to a modified asphalt mixture, the use and dispersion process is simple, the construction cost is low, the finally formed modified mixed asphalt mixture can be paved at outdoor low temperature, the existing processing difficulty can be effectively solved, the processing efficiency is effectively improved, and the road performance is good.
Compared with the prior art, the invention has the beneficial effects that:
(1) the dimethyl silicone oil and hydrogen-containing silicone oil are added into the asphalt modified material, so that the flexibility of asphalt, the compatibility and the dispersibility of the interface adhesive and the asphalt can be improved, the generation of bubbles is reduced, and the water resistance of the asphalt is improved.
(2) The amine and platinum compounds are matched to be used as the curing agent, so that the epoxy resin and the silicone oil can be rapidly cured by the asphalt modified material at normal temperature or even low temperature, construction can be carried out under outdoor low-temperature conditions, and the construction efficiency is effectively improved.
(3) The interfacial adhesive, the epoxy resin, the silicone oil and the curing agent are mutually matched to ensure that the asphalt modifier has high strength, high toughness and good cohesiveness, and is used for modifying the asphalt mixture to ensure that the asphalt mixture has good road performance.
Detailed Description
The novel normal-temperature asphalt modified material mainly comprises the following components in percentage by mass: 5-10% of an interface binder, 84-93% of a toughening material and 2-6% of a curing agent; the interface binder is one or two of polyethylene wax and epoxy resin; the toughening material comprises polydimethylsiloxane oil and hydrogen-containing silicone oil; the curing agent is one or more of amine compounds and platinum compounds.
Preferably, the epoxy resin is a liquid bisphenol a glycidyl ether type epoxy resin.
More preferably, the epoxy value of the epoxy resin is 0.4 to 0.6%.
Preferably, the interfacial bonding agent consists of 10-20 wt% of polyethylene wax and 80-90 wt% of epoxy resin.
Preferably, the curing agent consists of 85-90 wt% of amine curing agent and 10-15 wt% of platinum curing agent.
More preferably, the curing agent consists of 90 wt% of ethylenediamine and 10 wt% of chloroplatinic acid.
For better comparison to illustrate the experimental results, the same liquid bisphenol A glycidyl ether type epoxy resin with an epoxy value of 0.42% was used in the following examples.
The preparation method of the novel normal-temperature asphalt modified material of the embodiment comprises the following steps:
(1) weighing the components of the interface binder and the toughening material according to a certain proportion;
(2) the interface adhesive and the toughening material components are put into a mixing device to be mixed to form a composite material;
the composite material and the curing agent jointly form the novel normal-temperature asphalt modified material.
The application of the novel normal-temperature asphalt modified material in the modified asphalt mixture of the embodiment comprises the following steps:
directly adding a composite material formed by a binder and a toughening material into matrix asphalt (No. 70 petroleum asphalt) to prepare modified asphalt;
directly adding modified asphalt into mineral aggregate with certain gradation, and adding a curing agent in the stirring and mixing process to form a normal-temperature modified asphalt mixture;
the mixing mass ratio of the novel normal-temperature asphalt modified material to the matrix asphalt is 1: 1-1.5: 1.
The technical solutions of the present invention are described in detail and fully below with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention. Equivalent changes or substitutions of method, process route, function and the like by those skilled in the art according to the following embodiments are within the scope of the present invention.
Example 1
The novel normal-temperature asphalt modified material of the embodiment comprises the following components in percentage by mass: 5% of interface adhesive, 89% of toughening material and 6% of curing agent.
The interface binder is composed of the following raw materials in percentage by mass: 20% of polyethylene wax and 80% of epoxy resin. The toughening material comprises the following raw materials in percentage by mass: 50% of polydimethyl silicone oil and 50% of hydrogen-containing silicone oil. The curing agent is composed of the following raw materials in percentage by mass: 90% of hexamethylene diamine and 10% of chloroplatinic acid.
The viscosity of the simethicone is 20 cs; the hydrogen content of the hydrogen-containing silicone oil is 0.1%. The mass ratio of the polydimethyl silicone oil to the hydrogen-containing silicone oil is 1: 1.
The preparation method of the novel normal-temperature asphalt modified material comprises the following steps:
(1) weighing the components of the interface binder and the toughening material according to a certain proportion;
(2) the interface adhesive and the toughening material components are put into a mixing device to be mixed, the mixing temperature is room temperature, and the mixing time is 60 minutes, so that the composite material is formed;
the composite material and the curing agent jointly form the novel normal-temperature asphalt modified material.
Taking 5000g of asphalt and then asphalt as an example, the amount of the novel normal temperature asphalt modified material prepared in this example is 1.5 times that of the base asphalt, i.e., 7500 g.
The asphalt-modified material of this example was tested for properties: stirring and mixing a composite material formed by the binder and the toughening material with No. 70 matrix asphalt at normal temperature for 1h to prepare modified asphalt, adding a curing agent into the modified asphalt, testing the curing time of the modified asphalt, pouring the modified asphalt into a mold, curing at normal temperature for 36 h, and demolding to obtain a dumbbell-shaped sample of the cold-mixed epoxy asphalt cured product, which is used for testing the mechanical property. The mechanical property test condition is 23 +/-2 ℃, and the stretching speed is 10 mm/min. And testing the bonding strength by adopting a drawing instrument, wherein the testing method refers to GB/T2567-2008. The results of the tensile and pull tests are shown in table 1.
The application performance of the asphalt modified material of the embodiment in the modified asphalt mixture is tested: uniformly mixing the prepared modified asphalt with basalt aggregate (with the particle size of 1-2mm) according to technical Specification for road asphalt pavement construction (JTG F40-2004) at a weight ratio of 1:1, adding a curing agent, uniformly stirring, immediately paving and compacting at normal temperature (25 ℃), wherein the paving thickness is 6cm, the paving time is controlled within 10min, and the compacted thickness is 4 cm. After curing at room temperature for 24 hours, performance tests such as low-temperature water resistance and low-temperature bending tests were performed, and the results are shown in table 2.
Example 2
The novel normal-temperature asphalt modified material of the embodiment comprises the following components in percentage by mass: 10% of interface binder, 88% of toughening material and 2% of curing agent.
The interface binder is composed of the following raw materials in percentage by mass: 10% of polyethylene wax and 90% of epoxy resin. The toughening material comprises the following raw materials in percentage by mass: 70% of polydimethyl silicone oil and 30% of hydrogen-containing silicone oil. The curing agent is composed of the following raw materials in percentage by mass: 88% of m-phenylenediamine and 12% of chloroplatinic acid.
The viscosity of the simethicone is 6000 cs; the hydrogen content of the hydrogen-containing silicone oil is 0.5 percent.
The preparation method of the novel normal temperature asphalt modified material of this example is the same as that of example 1.
In the example of 5000g of asphalt, the amount of the novel normal temperature asphalt modified material prepared in this example is 1 time of that of the base asphalt, i.e. 5000 g.
The performance of the asphalt modified material and its applicability in modified asphalt mixture of this example were tested in the same manner as in example 1.
Example 3
The novel normal-temperature asphalt modified material of the embodiment comprises the following components in percentage by mass: 5% of interface binder, 93% of toughening material and 2% of curing agent.
The interface binder is composed of the following raw materials in percentage by mass: 10% of polyethylene wax and 90% of epoxy resin. The toughening material comprises the following raw materials in percentage by mass: 83% of polydimethyl silicone oil and 17% of hydrogen-containing silicone oil. The curing agent is composed of the following raw materials in percentage by mass: 88% of ethylenediamine and 12% of chloroplatinic acid.
The viscosity of the dimethyl silicone oil is 3000 cs; the hydrogen content of the hydrogen-containing silicone oil is 1.5%.
The preparation method of the novel normal temperature asphalt modified material of this example is the same as that of example 1.
In the example of 5000g of asphalt, the amount of the novel normal temperature asphalt modified material prepared in this example is 1.2 times that of the base asphalt, i.e., 6000 g.
The performance of the asphalt modified material and its applicability in modified asphalt mixture of this example were tested in the same manner as in example 1.
Example 4
The novel normal-temperature asphalt modified material of the embodiment comprises the following components in percentage by mass: 8% of interface binder, 88% of toughening material and 4% of curing agent.
The interface binder is composed of the following raw materials in percentage by mass: 10% of polyethylene wax and 90% of epoxy resin. The toughening material comprises the following raw materials in percentage by mass: 65% of polydimethyl silicone oil and 35% of hydrogen-containing silicone oil. The curing agent is composed of the following raw materials in percentage by mass: 90% of ethylenediamine and 10% of chloroplatinic acid.
The viscosity of the dimethyl silicone oil is 3000 cs; the hydrogen content of the hydrogen-containing silicone oil is 0.7%.
The preparation method of the novel normal temperature asphalt modified material of this example is the same as that of example 1.
In the example of 5000g of asphalt, the amount of the novel normal temperature asphalt modified material prepared in this example is 1 time of that of the base asphalt, i.e. 5000 g.
The performance of the asphalt modified material and its applicability in modified asphalt mixture of this example were tested in the same manner as in example 1.
Example 5
Compared with example 4, the interfacial adhesive in this comparative example consists of only epoxy resin; the rest is the same as in example 4.
The performance of the asphalt modified material and its applicability in modified asphalt mixture of this example were tested in the same manner as in example 1.
Example 6
Compared with example 4, the curing agent in the comparative example only consists of ethylenediamine; the rest is the same as in example 4.
The performance of the asphalt modified material and its applicability in modified asphalt mixture of this example were tested in the same manner as in example 1.
Comparative example 1
The novel normal-temperature asphalt modified material of the comparative example comprises the following components in percentage by mass: 19% of interface adhesive, 77% of toughening material and 4% of curing agent.
The interface binder is composed of the following raw materials in percentage by mass: 10% of polyethylene wax and 90% of epoxy resin. The toughening material comprises the following raw materials in percentage by mass: 65% of polydimethyl silicone oil and 35% of hydrogen-containing silicone oil. The curing agent is composed of the following raw materials in percentage by mass: 90% of ethylenediamine and 10% of chloroplatinic acid.
The viscosity of the dimethyl silicone oil is 3000 cs; the hydrogen content of the hydrogen-containing silicone oil is 0.7%.
The preparation method of the novel normal temperature asphalt modified material of this example is the same as that of example 1.
In the example of 5000g of asphalt, the amount of the novel normal temperature asphalt modified material prepared in this example is 1 time of that of the base asphalt, i.e. 5000 g.
The modified material of the embodiment is difficult to be uniformly mixed with the matrix asphalt at room temperature, so the modified asphalt is prepared by heating to 50 ℃ and stirring and mixing.
Compared with the embodiment 4, the proportion of the toughening material and the interfacial bonding agent is only changed in the comparative example; the rest is the same as in example 4.
The performance of the asphalt modified material of this comparative example and its applicability in modified asphalt mixtures were tested in the same manner as in example 1.
Comparative example 2
Compared with example 4, the toughening material in the comparative example only consists of polydimethylsiloxane oil; the rest is the same as in example 4.
The performance of the asphalt modified material of this comparative example and its applicability in modified asphalt mixtures were tested in the same manner as in example 1.
Comparative example 3
The asphalt-modified material of this comparative example included: 3kg of epoxy resin, 1.2kg of sodium dodecyl benzene sulfonate and 0.3kg of nano TiO2Microparticles, and 0.7g of isophoronediamine.
The asphalt modified material of this comparative example was difficult to mix uniformly with the base asphalt at room temperature, and for the performance test, 7kg of the base asphalt was mixed with the above-mentioned mass of epoxy resin, sodium dodecylbenzenesulfonate and modified nano TiO2The particles are stirred for 3 hours at 120 ℃ and are uniformly dispersed to prepare the modified asphalt.
The performance of the asphalt modified material of this comparative example and its applicability in modified asphalt mixtures were tested in the same manner as in example 1.
As can be seen from the results in Table 1, the modified asphalt obtained by mixing the asphalt modified material of the examples of the present invention with the matrix asphalt has a curing time of less than 30 hours, and has high tensile strength, bonding strength and elongation at break, which indicates that the modified asphalt of the examples has not only high bonding strength but also good toughness after curing.
TABLE 1 asphalt modified Material Performance test results
The results in table 2 show that the asphalt modified material of the embodiment of the invention can improve the rutting resistance and the water stability when applied to the modified asphalt mixture, and has higher bending tensile strength and bending tensile strain. This demonstrates the better low temperature flexibility and low temperature crack resistance of the modified asphalt mix of the examples.
TABLE 2 application Performance test results of asphalt modified materials in modified asphalt mixtures
In combination with tables 1 and 2, it can be seen from comparing example 4 and example 5 or 6 alone that the performance of example 4 is significantly better than examples 5 and 6, and the bond strength and elongation at break, split strength ratio, and flexural strength of example 4 are significantly higher than those of example 5. The interface adhesive is formed by combining a proper amount of epoxy resin and polyethylene wax, and compared with the single use of the epoxy resin, the adhesive strength of the interface adhesive can be improved, and the low-temperature crack resistance of the interface adhesive can also be improved. The curing speed of the example 4 is obviously higher than that of the example 6, and the bonding strength, the stability at 60 ℃, the bending and pulling performance and the like of the composite material are obviously improved. This indicates that the curing speed is faster with the combined curing agent than with the amine curing agent alone, and the high and low temperature stability is greatly improved.
Comparing example 4 and comparative examples 1 and 2 alone, it can be seen that changing the ratio of the components of the present invention (e.g., changing the ratio of the toughening material to the interfacial binder in comparative example 1) or removing one of the materials (e.g., no hydrogen-containing silicone oil is added in comparative example 2) greatly reduces the overall performance of the modified asphalt mixture. The raw materials have synergistic effect only under proper proportion, so that the dispersibility and water resistance of the asphalt are greatly improved, bubbles are reduced, the curing speed of the modified asphalt is greatly accelerated, the flexibility and the bonding strength of the modified asphalt are improved, and the water damage resistance, the low-temperature crack resistance and the rutting resistance of the asphalt mixture can be obviously improved.
In comparative example 3, sodium dodecylbenzenesulfonate was used as a dispersant, epoxy resin and nano TiO2The temperature at which the particles can stir and disperse the modified material and the asphalt is slightly reduced, but the particles cannot be stirred at room temperature, and the comprehensive performance of the prepared modified asphalt mixture is poor.
In conclusion, the asphalt modified material of the invention can be stirred and dispersed with matrix asphalt at normal temperature, the strength and the flexibility of the asphalt modified material are improved, the prepared modified asphalt mixture can be paved and cured at room temperature, the room-temperature curing speed of the asphalt modified material is greatly improved, the water damage resistance, the low-temperature crack resistance and the rutting resistance of the cured asphalt modified material are improved, and the pavement performance is good.
Having shown and described the basic principles, essential features and advantages of the invention, while embodiments of the invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A novel normal-temperature asphalt modified material is characterized by mainly comprising the following components in percentage by mass: 5-10% of an interface binder, 84-93% of a toughening material and 2-6% of a curing agent; the interface binder consists of 10-20 wt% of polyethylene wax and 80-90 wt% of epoxy resin; the toughening material comprises polydimethylsiloxane and hydrogen-containing silicone oil, and the mass ratio of the polydimethylsiloxane to the hydrogen-containing silicone oil is 1: 1-5: 1; the curing agent is one or more of amine compounds and platinum compounds.
2. The novel normal-temperature asphalt modified material as claimed in claim 1, wherein the viscosity of the polydimethylsiloxane oil at 25 ℃ is 20-6000 cs.
3. The novel normal-temperature asphalt modified material as claimed in claim 1, wherein the hydrogen content of the hydrogen-containing silicone oil is 0.1-1.5%.
4. The novel normal-temperature asphalt modified material as claimed in claim 1, wherein the amine curing agent is one or more of ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, diethylaminopropylamine and m-phenylenediamine.
5. The novel normal-temperature asphalt modified material as claimed in claim 1, wherein the platinum curing agent is chloroplatinic acid.
6. A novel normal-temperature asphalt modified material as claimed in any one of claims 1 to 5, wherein the curing agent is composed of 85-90 wt% of amine curing agent and 10-15 wt% of platinum curing agent.
7. The method for preparing a novel normal-temperature asphalt modified material as claimed in any one of claims 1 to 5, comprising the steps of:
(1) weighing the components of the interface binder and the toughening material according to a certain proportion;
(2) the interface adhesive and the toughening material components are put into a mixing device to be mixed to form a composite material;
the composite material and the curing agent jointly form the novel normal-temperature asphalt modified material.
8. The application of the novel normal-temperature asphalt modified material prepared by the preparation method of the novel normal-temperature asphalt modified material as claimed in claim 7 in modified asphalt mixture is characterized in that the application method is as follows:
directly adding a composite material formed by a binder and a toughening material into matrix asphalt to prepare modified asphalt;
directly adding modified asphalt into mineral aggregate with certain gradation, and adding a curing agent in the stirring and mixing process to form a normal-temperature modified asphalt mixture;
the mixing mass ratio of the novel normal-temperature asphalt modified material to the matrix asphalt is 1: 1-1.5: 1.
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| CN103467921A (en) * | 2013-09-12 | 2013-12-25 | 东华大学 | Toughened and heat-resisting epoxy resin and preparation method thereof |
| CN104987735B (en) * | 2015-07-06 | 2017-12-15 | 交通运输部公路科学研究所 | A kind of silicon-modified epoxy pitch and compound |
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