CN116052809B - Design method and device for bionic asphalt material - Google Patents
Design method and device for bionic asphalt material Download PDFInfo
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Abstract
The invention relates to the technical field of building materials, and provides a design method and a device of a bionic asphalt material, wherein the method comprises the following steps: determining a bionic mechanism according to the bionic object to determine a chemical material conforming to the bionic mechanism; performing chemical modification on the basis of the chemical material and matrix asphalt to obtain a bionic asphalt material, and determining characteristic peak change of the bionic asphalt material; if the characteristic peak change corresponds to the bionic mechanism, determining performance parameters of the bionic asphalt material; and determining the design scheme of the bionic asphalt material according to the performance parameters. The bionic asphalt material has the advantages of simple design scheme and low production cost, and can efficiently obtain the bionic asphalt material meeting the high-performance requirement.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a design method and device of a bionic asphalt material.
Background
Asphalt pavement is the first choice of the pavement type of the high-grade highway, and the excellent bearing capacity, tensile pressure capacity, fatigue resistance and the like of asphalt concrete are closely related to the performances of asphalt materials. Therefore, in the field of road engineering, development and application of the high-performance asphalt material are important to ensure long-life and high-efficiency service of the asphalt pavement. The material-structure-function integrated characteristic of the high-performance asphalt material, especially the complexity of the internal structure, determines the design method of the high-performance asphalt material, and is necessarily based on a comprehensive, perfect and practical design theory.
In recent years, along with the development of bionic means and material design theory, the design and application efficiency of the bionic material are remarkably improved, and the application of the bionic material in the fields of aerospace, biomedical and the like is greatly promoted. The appearance of bionics provides a new idea for the development and design of high-performance asphalt materials: the asphalt material is modified from a molecular level by penetrating into the chemical structure of the material, so that the asphalt material not only has high-strength performance, but also has the environmental resistance enhanced design means. At present, when the bionic asphalt material is designed, the proportion and other parameters are more random, continuous trial and error is required, and based on the method, a large amount of resources are required to be consumed, the labor cost is high, and the design method is complex.
Disclosure of Invention
The invention provides a design method and a device of a bionic asphalt material, which are used for solving the problems in the background technology.
The invention provides a design method of a bionic asphalt material, which comprises the following steps:
determining a bionic mechanism according to a bionic object to determine a chemical material conforming to the bionic mechanism;
performing chemical modification on the chemical material and matrix asphalt to obtain a bionic asphalt material, and determining characteristic peak change of the bionic asphalt material;
if the characteristic peak change corresponds to the bionic mechanism, determining performance parameters of the bionic asphalt material;
and determining the design scheme of the bionic asphalt material according to the performance parameters.
In one embodiment, the chemical modification includes material prepolymerization and matrix asphalt grafting;
the method for preparing the bionic asphalt material based on the chemical material and the matrix asphalt comprises the following steps:
determining the proportion, the adding sequence, the mixing temperature, the first stirring speed and the first stirring time of the chemical materials so as to perform material prepolymerization on the chemical materials to obtain a prepolymer;
and stirring the prepolymer at a set temperature, a second stirring rate and a second stirring time, and grafting the prepolymer with the matrix asphalt.
In one embodiment, the determining the characteristic peak variation of the biomimetic asphalt material comprises:
and determining the characteristic peak change of the bionic asphalt material by adopting a Fourier infrared spectrum test.
In one embodiment, the performance parameters include strength, toughness, adhesion characteristics, and self-healing characteristics;
the determining of the performance parameters of the biomimetic asphalt material comprises:
determining the strength and the toughness of the bionic asphalt material by adopting a linear amplitude scanning test;
determining the adhesion characteristic of the bionic asphalt material by adopting a drawing test and an adhesion characteristic calculation formula;
and determining the self-healing characteristic of the bionic asphalt material by adopting a self-healing test of linear amplitude scanning and a self-healing percentage calculation formula.
In one embodiment, the adhesion characteristic calculation formula is:
in the formula, HI a Represents adhesion characteristics of bionic asphalt material and POST 0 Represents the initial drawing strength at the time of the first drawing, POST after Represents the pull strength after healing;
the self-healing percentage calculation formula is as follows:
in the formula, HI c Represents the self-healing percentage of the bionic asphalt material,represents the dynamic shear modulus of the bionic asphalt material after the intermittent period, < + >>Representing the dynamic shear modulus of the biomimetic asphalt material before the intermittent period.
In one embodiment, the determining the design scheme of the bionic asphalt material according to the performance parameter includes:
if each performance parameter of the bionic asphalt material is larger than the corresponding performance parameter of the matrix asphalt and at least two performance parameters are larger than a set value, determining the design scheme of the bionic asphalt material based on the bionic object, the bionic mechanism, the bionic asphalt material and the preparation method of the bionic asphalt material.
In one embodiment, the determining a chemical material that conforms to the biomimetic mechanism comprises:
determining a material which is based on the bionic mechanism and chemically reacts with the matrix asphalt, and taking the material which is chemically reacted with the matrix asphalt as a chemical material which accords with the bionic mechanism.
The invention also provides a device for designing the bionic asphalt material, which comprises:
the chemical material determining module is used for determining a bionic mechanism according to a bionic object so as to determine a chemical material conforming to the bionic mechanism;
the characteristic peak change determining module is used for carrying out chemical modification on the basis of the chemical material and the matrix asphalt to obtain a bionic asphalt material and determining the characteristic peak change of the bionic asphalt material;
the performance parameter determining module is used for determining the performance parameters of the bionic asphalt material if the characteristic peak change corresponds to the bionic mechanism;
and the design scheme determining module is used for determining the design scheme of the bionic asphalt material according to the performance parameters.
According to the design method and the device for the bionic asphalt material, the bionic mechanism is determined according to the bionic object, so that the chemical material conforming to the bionic mechanism is determined; performing chemical modification on the basis of the chemical material and matrix asphalt to obtain a bionic asphalt material, and determining characteristic peak change of the bionic asphalt material; if the characteristic peak change corresponds to the bionic mechanism, determining performance parameters of the bionic asphalt material; and determining the design scheme of the bionic asphalt material according to the performance parameters. The bionic asphalt material has the advantages of simple design scheme and low production cost, and can efficiently obtain the bionic asphalt material meeting the high-performance requirement.
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In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a design method of a bionic asphalt material provided by the invention;
FIG. 2 is a Fourier infrared spectrogram of the bionic asphalt material provided by the invention;
FIG. 3 is a graph of strength evaluation indicators of the bionic asphalt material provided by the invention;
FIG. 4 is a toughness evaluation index chart of the bionic asphalt material provided by the invention;
FIG. 5 is an adhesion characteristic evaluation index chart of the bionic asphalt material provided by the invention;
FIG. 6 is a self-healing characteristic evaluation index chart of the bionic asphalt material provided by the invention;
fig. 7 is a schematic structural diagram of a device for designing a bionic asphalt material.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The following describes the design method and apparatus of the biomimetic asphalt material of the present invention with reference to fig. 1-7.
Specifically, the invention provides a design method of a bionic asphalt material, and referring to fig. 1, fig. 1 is a flow diagram of the design method of the bionic asphalt material provided by the invention.
The design method of the bionic asphalt material provided by the embodiment of the invention comprises the following steps:
step 100, determining a bionic mechanism according to a bionic object to determine a chemical material conforming to the bionic mechanism;
before determining the bionic asphalt material, the bionic object is determined, then the bionic mechanism is determined based on the bionic object, and then the chemical material conforming to the bionic mechanism is determined. The bionic mechanism comprises reversible covalent bonds or intermolecular supermolecular actions possibly existing in the final bionic asphalt material.
The mode of determining the chemical material conforming to the bionic mechanism is as follows: determining a material which is based on a bionic mechanism and chemically reacts with the matrix asphalt, namely determining a material which can chemically react with the matrix asphalt based on the bionic mechanism, and then taking the material as a chemical material which accords with the bionic mechanism.
The determination of the biomimetic object and the biomimetic mechanism is the basis of the biomimetic principle, the direction can be indicated for the subsequent material prepolymerization and grafting scheme, and the available materials can be further selected based on the determined biomimetic principle, and the appropriate materials are preferred.
In one embodiment, an organism is determined as a biomimetic object. For example, the aquatic organism mussels, the proteins secreted by the mussels have high strength, toughness and viscosity characteristics to provide stability in complex water environments, and such properties make the mussels often used in the polymer field as biomimetic objects of biomimetic material design.
Based on the bionic object, the bionic mechanism applied by the bionic material design is defined. The protein secreted by mussel has high strength, high toughness and high viscosity due to phenolic hydroxyl group, -NH inside 2 the-COOH groups cross-link with each other to form intramolecular hydrogen bonds, and the groups can also react with Fe 3+ The plasma metal ions form metal coordination bonds. Although the hydrogen bond and the metal coordination bond are weak bonds, the bionic material still has excellent mechanical properties due to the high crosslinking density; meanwhile, due to the fracture and recovery characteristics of non-covalent dynamic bonds, the self-healing potential of the bionic material is endowed to a certain extent.
Materials are selected that can chemically react with the matrix asphalt through a biomimetic mechanism. Based on hydrogen bonding with metalsThe valence bond forming mechanism selects chitosan, ferric chloride, glacial acetic acid, acrylic acid and potassium persulfate as raw materials for preparing the bionic asphalt. Wherein the asphalt contains phenolic hydroxyl groups and can be combined with chitosan and-NH on acrylic acid 2 or-COOH forms hydrogen bonds, and can also form hydrogen bonds with Fe 3+ Complexing to form a metal coordination bond; at the same time Fe 3+ Can be combined with-NH on chitosan skeleton 2 or-COOH on acrylic acid or both constitute a metal coordination bond. The different materials and asphalt are based on multiple hydrogen bonding and a metal coordination system, so that the finally obtained asphalt material based on the mussel-like design principle has the characteristic of high performance.
Step 200, performing chemical modification on the basis of the chemical material and matrix asphalt to obtain a bionic asphalt material, and determining characteristic peak change of the bionic asphalt material;
chemical modification refers to a phenomenon in which the covalent structure of a protein or nucleic acid is changed by the introduction or removal of a chemical group. Where chemical modification includes material prepolymerization and matrix asphalt grafting, it is understood that grafting refers to the reaction of a macromolecular chain with a suitable branched or functional side group attached by chemical bonds, and the product of grafting is referred to as a graft copolymer.
Chemical modification is carried out on the basis of the chemical materials and matrix asphalt to obtain a bionic asphalt material, for example, under specific test conditions, the chemical materials conforming to a bionic mechanism are subjected to material prepolymerization to form a preliminary prepolymer; the prepolymer is then grafted onto a base asphalt to form a biomimetic asphalt material. It is understood that the biomimetic asphalt material refers to a material developed to simulate various characteristics or properties of living beings.
And determining the characteristic peak change of the bionic asphalt material. In one embodiment, fourier infrared spectroscopy is used to determine the characteristic peak variation of the biomimetic asphalt material. The characteristic peak in the spectrum test can verify the existence of a certain chemical bond or group in the material, and the spectrum test is carried out on the bionic asphalt material, thereby being beneficial to the characterization and verification of a bionic mechanism.
For example, the number of the cells to be processed,the characteristic peak changes of chemical bonds in the matrix asphalt and the bionic asphalt materials are detected by using a Fourier infrared spectrum test (refer to FIG. 2). By adopting the attenuated total reflection infrared spectrometry, only few samples are needed, and the internal structural information of the bionic asphalt material can be obtained without pretreatment. As shown in FIG. 2, two asphalt materials 3700-3000cm -1 The characteristic peak with wide and weak position is the vibration of-OH in phenolic hydroxyl group, after the prepolymer is added, the peak area is increased from 441.87 to 536.79, which indicates that the phenolic hydroxyl group in asphalt and-NH in the prepolymer 2 and-COOH to form additional intermolecular hydrogen bonds. Furthermore, 1620cm after addition of the prepolymer -1 The respiratory vibration peak area of the asymmetrically substituted benzene ring is reduced to a certain extent (because of Fe 3+ Less content, no significant damping), indicating phenolic hydroxyl groups and Fe 3+ Forming metal coordination.
Step 300, if the characteristic peak change corresponds to the bionic mechanism, determining performance parameters of the bionic asphalt material;
after determining the characteristic peak change of the bionic asphalt material, judging whether the characteristic peak change corresponds to a bionic mechanism, and if so, determining the performance parameters of the bionic asphalt material. For example, the internal structure and the functional group of the bionic asphalt material can be characterized through a spectrum image, and if the internal structure and the functional group of the bionic asphalt material are consistent with the structure in the bionic mechanism, the characteristic peak change is indicated to correspond to the bionic mechanism. If the characteristic peak change does not correspond to the bionic mechanism, the bionic object, the bionic mechanism or the material composition is changed, the material proportion, the test parameters and the like are optimized, spectral test analysis is further carried out, and a bionic design scheme which best meets the requirements of users is obtained according to the analysis result.
If the characteristic peak change corresponds to the bionic mechanism, further determining the performance parameters of the bionic asphalt material, wherein the performance parameters refer to mechanical and functional characteristics, including strength, toughness, adhesion characteristics and self-healing characteristics.
Step 400, determining the design scheme of the bionic asphalt material according to the performance parameters.
After the performance parameters of the bionic asphalt material are determined, the performance parameters are used as evaluation indexes to evaluate whether the bionic asphalt material meets high performance standards or not, and an optimal design scheme of the bionic asphalt material is determined.
Specifically, comparing the performance parameters of the bionic asphalt material with those of the matrix asphalt, and if each performance parameter of the bionic asphalt material is larger than that corresponding to the matrix asphalt and the enhancement effect of at least 2 performance parameters exceeds 40%, determining that the bionic asphalt is a bionic high-performance asphalt material and determining the design scheme of the bionic high-performance asphalt material. The design scheme of the bionic asphalt material comprises a bionic object, a bionic mechanism and the bionic asphalt material and a preparation method thereof.
And if the performance parameters of the bionic asphalt material do not meet the requirements, preparing the bionic asphalt material again, and evaluating the bionic asphalt material.
According to the design method of the bionic asphalt material, the bionic mechanism is determined according to the bionic object, so that the chemical material conforming to the bionic mechanism is determined; performing chemical modification on the basis of the chemical material and matrix asphalt to obtain a bionic asphalt material, and determining characteristic peak change of the bionic asphalt material; if the characteristic peak change corresponds to the bionic mechanism, determining performance parameters of the bionic asphalt material; and determining the design scheme of the bionic asphalt material according to the performance parameters. The bionic asphalt material has the advantages of simple design scheme and low production cost, and can efficiently obtain the bionic asphalt material meeting the high-performance requirement.
Based on the above embodiment, the method for chemically modifying the base asphalt with the chemical material to obtain the biomimetic asphalt material includes: determining the proportion, the adding sequence, the mixing temperature, the first stirring speed and the first stirring time of the chemical materials so as to perform material prepolymerization on the chemical materials to obtain a prepolymer; and stirring the prepolymer at a set temperature, a second stirring rate and a second stirring time, and grafting the prepolymer with the matrix asphalt.
It should be noted that, the design of the bionic material generally designs various materials, groups and principles, and combinations and applications of different materials and groups, and a great deal of tests are generally required to test the influence of factors such as material proportion, test conditions and the like.
In one embodiment, the proportions of the chemical materials conforming to the chemical mechanism, the order of addition, the mixing temperature (i.e., the temperature at the time of blending), the first stirring rate and the first stirring time are determined, and the chemical materials are subjected to material prepolymerization based on the above-determined information to obtain a prepolymer. For example, at room temperature, adding chitosan to a 3% glacial acetic acid solution at 900 rpm to prepare a 6% chitosan solution; 3ml of acrylic acid are added to 5ml of 6% chitosan solution and stirred at room temperature for 20 minutes at 1500 rpm; adding 0.5ml of 0.1mol/L ferric chloride solution into the reaction system, and continuously stirring for 5 minutes under the same working condition; adding 0.5ml of 0.2mol/L potassium persulfate solution into the reaction system, and keeping the same working condition until the reaction system is uniformly stirred to obtain a prepolymer.
And (3) standing the obtained prepolymer for a period of time at room temperature, and grafting with the matrix asphalt at a set temperature and a second stirring rate according to a proper mass ratio for a second stirring time. For example, the obtained prepolymer is kept stand for 24 hours at room temperature, the matrix asphalt is heated to 140 ℃ in a high-speed shearing device, the prepolymer and the matrix asphalt are mixed in a mass ratio of 2:98, and the mixture is stirred for 40 minutes under 4000 rpm first and then for 15 minutes under 1500 rpm to prepare the bionic asphalt material.
According to the embodiment of the invention, the chemical material conforming to the bionic mechanism is subjected to material prepolymerization to obtain the prepolymer, and then the prepolymer is grafted on the matrix asphalt to form the bionic asphalt material.
Based on the above embodiment, the determining the performance parameter of the biomimetic asphalt material includes: determining the strength and the toughness of the bionic asphalt material by adopting a linear amplitude scanning test; determining the adhesion characteristic of the bionic asphalt material by adopting a drawing test and an adhesion characteristic calculation formula; and determining the self-healing characteristic of the bionic asphalt material by adopting a self-healing test of linear amplitude scanning and a self-healing percentage calculation formula.
After the internal bionic mechanism of the material is verified through a spectrum test, the mechanical and functional characteristics of the bionic asphalt material are evaluated through an indoor test, wherein the mechanical characteristic evaluation index comprises the strength and toughness of the bionic asphalt material, and the strength evaluation index is a stress value corresponding to a peak point of a stress-strain curve. The toughness evaluation index is the area surrounded by the stress-strain curve and the transverse axis. The functional characteristic evaluation index comprises adhesion characteristics and self-healing characteristics of the bionic asphalt material. Considering that the evaluation method and index of the asphalt material performance are complex, the embodiment of the invention is mainly evaluated in four aspects of strength, toughness, adhesion characteristic and self-healing characteristic, so that the evaluation mode is simplified, and the evaluation accuracy is improved.
It should be noted that the performance parameters of the matrix asphalt can be determined in the same manner as described above.
The strength of the matrix asphalt and the bionic asphalt material is evaluated by adopting a linear amplitude scanning test, for example, referring to fig. 3, the peak stress corresponding to a stress strain curve is taken as an evaluation index, the peak stress of the bionic asphalt is 372110kPa, is remarkably higher than the peak stress 250410kPa of the matrix asphalt, and is amplified by 48.6%, so that a great strength enhancing effect is shown.
The toughness of the matrix asphalt and the bionic asphalt material is evaluated by adopting a linear amplitude scanning test, for example, referring to fig. 4, the area surrounded by a stress strain curve and a transverse axis is taken as an evaluation index, the toughness of the bionic asphalt reaches 38.82KPa, is remarkably higher than the toughness of the matrix asphalt by 23.64KPa, and is amplified by 64.2%, so that a very strong toughness enhancing effect is shown.
The adhesion characteristics of the matrix asphalt and the bionic asphalt material are evaluated by a drawing test, for example, referring to fig. 5, according to the adhesion characteristic evaluation method of the drawing test, the adhesion characteristics of the bionic asphalt material are evaluated by using the adhesion characteristics calculation formula based on the drawing strength after the adhesion characteristics are respectively completed under the dry and wet conditions. Under the drying condition, the adhesion characteristic percentage of the bionic asphalt is 177.2 percent, which is obviously higher than that of the matrix asphalt by 77.2 percent, and the amplification is 129.5 percent; under the wet condition, the adhesion characteristic percentage of the bionic asphalt is 84.5%, which is obviously higher than that of the matrix asphalt by 52.0%, and the amplification is 62.5%. The adhesive has a great adhesion enhancing effect in both dry and wet environments.
Wherein, the adhesion characteristic calculation formula is:
in the formula, HI a Represents adhesion characteristics of bionic asphalt material and POST 0 Represents the initial drawing strength at the time of the first drawing, POST after Indicating the pull strength after healing.
The self-healing characteristics of the matrix asphalt and the bionic asphalt material are evaluated by adopting a self-healing test based on linear amplitude scanning, for example, referring to fig. 6, the self-healing performance evaluation method is completed according to the self-healing test based on the linear amplitude scanning test, and under the 50% damage state, the self-healing characteristics of the bionic asphalt material are evaluated according to a self-healing percentage calculation formula by taking 300s and 900s as intermittent periods and taking a modulus decay curve as a basis. Under the condition of 50% damage and 300s intermittent period, the self-healing percentage of the bionic asphalt is 26.8%, which is higher than the self-healing percentage of the matrix asphalt by 19.4%, and the amplification is 38.1%; under the condition of 50% damage and 900s intermittent period, the self-healing percentage of the bionic asphalt is 35.7%, which is higher than the self-healing percentage of the matrix asphalt by 25.2%, and the amplification is 41.7%. The self-healing reinforcing effect is certain under different test working conditions.
The self-healing percentage calculation formula is:
in the formula, HI c Represents the self-healing percentage of the bionic asphalt material,represents the dynamic shear modulus of the bionic asphalt material after the intermittent period, < + >>Representing the dynamic shear modulus of the biomimetic asphalt material before the intermittent period.
According to the embodiment of the invention, the four performance parameters of the strength, the toughness, the adhesion characteristic and the self-healing characteristic of the bionic asphalt material are determined, and the four performance parameters are used as evaluation indexes to evaluate the bionic asphalt material so as to determine whether the high performance standard is met. Based on the method, the evaluation mode is simplified, and the evaluation accuracy is improved.
Fig. 7 is a schematic structural diagram of a device for designing a biomimetic asphalt material according to the present invention, and referring to fig. 7, an embodiment of the present invention provides a device for designing a biomimetic asphalt material, which includes a chemical material determining module 701, a characteristic peak change determining module 702, a performance parameter determining module 703 and a design scheme determining module 704.
A chemical material determining module 701, configured to determine a bionic mechanism according to a bionic object, so as to determine a chemical material according to the bionic mechanism;
the characteristic peak change determining module 702 is configured to perform chemical modification based on the chemical material and the matrix asphalt to obtain a bionic asphalt material, and determine a characteristic peak change of the bionic asphalt material;
a performance parameter determining module 703, configured to determine a performance parameter of the bionic asphalt material if the characteristic peak variation corresponds to the bionic mechanism;
and the design scheme determining module 704 is configured to determine a design scheme of the bionic asphalt material according to the performance parameter.
According to the design device of the bionic asphalt material, the bionic mechanism is determined according to the bionic object, so that the chemical material conforming to the bionic mechanism is determined; performing chemical modification on the basis of the chemical material and matrix asphalt to obtain a bionic asphalt material, and determining characteristic peak change of the bionic asphalt material; if the characteristic peak change corresponds to the bionic mechanism, determining performance parameters of the bionic asphalt material; and determining the design scheme of the bionic asphalt material according to the performance parameters. The bionic asphalt material has the advantages of simple design scheme and low production cost, and can efficiently obtain the bionic asphalt material meeting the high-performance requirement.
The chemical modification comprises material prepolymerization and matrix asphalt grafting;
in one embodiment, the characteristic peak change determining module 702 is specifically configured to:
determining the proportion, the adding sequence, the mixing temperature, the first stirring speed and the first stirring time of the chemical materials so as to perform material prepolymerization on the chemical materials to obtain a prepolymer;
and stirring the prepolymer at a set temperature, a second stirring rate and a second stirring time, and grafting the prepolymer with the matrix asphalt.
In one embodiment, the characteristic peak change determining module 702 is specifically configured to:
and determining the characteristic peak change of the bionic asphalt material by adopting a Fourier infrared spectrum test.
The performance parameters include strength, toughness, adhesion characteristics, and self-healing characteristics;
in one embodiment, the performance parameter determining module 703 is specifically configured to:
determining the strength and the toughness of the bionic asphalt material by adopting a linear amplitude scanning test;
determining the adhesion characteristic of the bionic asphalt material by adopting a drawing test and an adhesion characteristic calculation formula;
and determining the self-healing characteristic of the bionic asphalt material by adopting a self-healing test of linear amplitude scanning and a self-healing percentage calculation formula.
The adhesion characteristic calculation formula is as follows:
in the formula, HI a Represents adhesion characteristics of bionic asphalt material and POST 0 Represents the initial drawing strength at the time of the first drawing, POST after Represents the pull strength after healing;
the self-healing percentage calculation formula is as follows:
in the formula, HI c Represents the self-healing percentage of the bionic asphalt material,represents the dynamic shear modulus of the bionic asphalt material after the intermittent period, < + >>Representing the dynamic shear modulus of the biomimetic asphalt material before the intermittent period.
In one embodiment, the design determination module 704 is specifically configured to:
if each performance parameter of the bionic asphalt material is larger than the corresponding performance parameter of the matrix asphalt and at least two performance parameters are larger than a set value, determining the design scheme of the bionic asphalt material based on the bionic object, the bionic mechanism, the bionic asphalt material and the preparation method of the bionic asphalt material.
In one embodiment, the chemical material determination module 701 is specifically configured to:
determining a material which is based on the bionic mechanism and chemically reacts with the matrix asphalt, and taking the material which is chemically reacted with the matrix asphalt as a chemical material which accords with the bionic mechanism.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The design method of the bionic asphalt material is characterized by comprising the following steps of:
determining a bionic mechanism according to a bionic object to determine a chemical material conforming to the bionic mechanism;
performing chemical modification on the chemical material and matrix asphalt to obtain a bionic asphalt material, and determining characteristic peak change of the bionic asphalt material; the chemical modification comprises material prepolymerization and matrix asphalt grafting;
if the characteristic peak change corresponds to the bionic mechanism, determining performance parameters of the bionic asphalt material; the performance parameters include strength, toughness, adhesion characteristics, and self-healing characteristics;
determining the design scheme of the bionic asphalt material according to the performance parameters;
the method for preparing the bionic asphalt material based on the chemical material and the matrix asphalt comprises the following steps:
determining the proportion, the adding sequence, the mixing temperature, the first stirring speed and the first stirring time of the chemical materials so as to perform material prepolymerization on the chemical materials to obtain a prepolymer;
stirring the prepolymer by adopting a set temperature, a second stirring rate and a second stirring time, and grafting the prepolymer with the matrix asphalt;
the determining of the performance parameters of the biomimetic asphalt material comprises:
determining the strength and the toughness of the bionic asphalt material by adopting a linear amplitude scanning test;
determining the adhesion characteristic of the bionic asphalt material by adopting a drawing test and an adhesion characteristic calculation formula;
determining the self-healing characteristic of the bionic asphalt material by adopting a self-healing test of linear amplitude scanning and a self-healing percentage calculation formula;
the adhesion characteristic calculation formula is as follows:
in the formula, HI a Represents adhesion characteristics of bionic asphalt material and POST 0 Represents the initial drawing strength at the time of the first drawing, POST after Represents the pull strength after healing;
the self-healing percentage calculation formula is as follows:
in the formula, HI c Represents the self-healing percentage of the bionic asphalt material,representing the movement of the bionic asphalt material after the intermittent periodState shear modulus>Representing the dynamic shear modulus of the biomimetic asphalt material before the intermittent period.
2. The method for designing a biomimetic asphalt material according to claim 1, wherein the determining of the characteristic peak variation of the biomimetic asphalt material comprises:
and determining the characteristic peak change of the bionic asphalt material by adopting a Fourier infrared spectrum test.
3. The method for designing a biomimetic asphalt material according to claim 1, wherein the determining the design scheme of the biomimetic asphalt material according to the performance parameter comprises:
if each performance parameter of the bionic asphalt material is larger than the corresponding performance parameter of the matrix asphalt and at least two performance parameters are larger than a set value, determining a design scheme of the bionic asphalt material based on the bionic object, the bionic mechanism, the bionic asphalt material and a preparation method of the bionic asphalt material.
4. The method of designing a biomimetic asphalt material according to claim 1, wherein the determining a chemical material conforming to the biomimetic mechanism comprises:
determining a material which is based on the bionic mechanism and chemically reacts with the matrix asphalt, and taking the material which is chemically reacted with the matrix asphalt as a chemical material which accords with the bionic mechanism.
5. A device for designing a biomimetic asphalt material, comprising:
the chemical material determining module is used for determining a bionic mechanism according to a bionic object so as to determine a chemical material conforming to the bionic mechanism;
the characteristic peak change determining module is used for carrying out chemical modification on the basis of the chemical material and the matrix asphalt to obtain a bionic asphalt material and determining the characteristic peak change of the bionic asphalt material; the chemical modification comprises material prepolymerization and matrix asphalt grafting;
the performance parameter determining module is used for determining the performance parameters of the bionic asphalt material if the characteristic peak change corresponds to the bionic mechanism; the performance parameters include strength, toughness, adhesion characteristics, and self-healing characteristics;
the design scheme determining module is used for determining the design scheme of the bionic asphalt material according to the performance parameters;
the characteristic peak change determining module is specifically configured to determine a ratio, an addition sequence, a mixing temperature, a first stirring rate and a first stirring time of the chemical material, so as to perform material prepolymerization on the chemical material to obtain a prepolymer; stirring the prepolymer by adopting a set temperature, a second stirring rate and a second stirring time, and grafting the prepolymer with the matrix asphalt;
the performance parameter determining module is specifically used for determining the strength and the toughness of the bionic asphalt material by adopting a linear amplitude scanning test; determining the adhesion characteristic of the bionic asphalt material by adopting a drawing test and an adhesion characteristic calculation formula; determining the self-healing characteristic of the bionic asphalt material by adopting a self-healing test of linear amplitude scanning and a self-healing percentage calculation formula;
the adhesion characteristic calculation formula is as follows:
in the formula, HI a Represents adhesion characteristics of bionic asphalt material and POST 0 Represents the initial drawing strength at the time of the first drawing, POST after Represents the pull strength after healing;
the self-healing percentage calculation formula is as follows:
in the formula, HI c Represents the self-healing percentage of the bionic asphalt material,represents the dynamic shear modulus of the bionic asphalt material after the intermittent period, < + >>Representing the dynamic shear modulus of the biomimetic asphalt material before the intermittent period.
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| US6527849B2 (en) * | 1990-06-19 | 2003-03-04 | Carolyn M. Dry | Self-repairing, reinforced matrix materials |
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| CN107022198A (en) * | 2017-03-17 | 2017-08-08 | 北京建筑大学 | A kind of bionical self-healing property pitch and preparation method thereof |
| CN109541192A (en) * | 2018-12-27 | 2019-03-29 | 北京工业大学 | A kind of evaluation method of road asphalt self-healing behavioral trait |
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