CN109704637B - Pavement regenerant and preparation method and application thereof - Google Patents
Pavement regenerant and preparation method and application thereof Download PDFInfo
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- CN109704637B CN109704637B CN201910152056.1A CN201910152056A CN109704637B CN 109704637 B CN109704637 B CN 109704637B CN 201910152056 A CN201910152056 A CN 201910152056A CN 109704637 B CN109704637 B CN 109704637B
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Abstract
The embodiment of the invention discloses a pavement regenerant, which comprises the following components in parts by weight: 50-100 parts of a carbon dioxide copolymer; 10-20 parts of fiber materials; and 1-5 parts of a nano filler. The invention also discloses a preparation method of the pavement regenerant, which comprises the following steps: 1) crushing and dissolving the carbon dioxide copolymer in a solvent to form a solution A, wherein the solvent is ethyl acetate or dimethyl carbonate; 2) uniformly mixing the fiber material and the nano filler, adding the solution A obtained in the step 1), and jointly stirring to form a mixture B. The invention also discloses a method for regenerating a damaged pavement by using the pavement regenerant.
Description
Technical Field
The embodiment of the invention relates to the technical field of road repair, in particular to a pavement regenerant and a preparation method and application thereof.
Background
At present, domestic roads are mainly asphalt roads and cement roads, the traffic time of the asphalt roads is mostly ten years or longer, however, the asphalt roads are influenced by environmental factors for a long time and are easy to age, such as sunlight irradiation, rain wash, temperature change and the like, so that the asphalt roads can generate ruts, cracks, looseness, pits and the like in the service process, and particularly the problems are particularly serious under the background of modern traffic heavy load, large flow and channelization, and the timely maintenance is very important. At present, the asphalt pavement regeneration mainly comprises hot regeneration and cold regeneration. Compared with the road surface without thermal regeneration, the high-low temperature performance and the fatigue performance of the mixture after thermal regeneration are reduced, the engineering quantity is large, the construction period is long, and the cost is high. The cold recycling can effectively improve the low-temperature performance of the recycled pavement, but the effect of the cold recycling pavement is greatly influenced by the emulsified asphalt, the high-temperature performance of a plurality of cold recycling mixtures is not high, and particularly the waterproof performance and the anti-skid performance are not good.
The other common road is a cement road, and because concrete is a brittle material with low tensile strength and poor toughness, the concrete is very easy to crack and fault after being cast, and the cement road surface restoration methods in the future mainly comprise two methods, one is renovation, chiseling the damaged part of the road surface, restoring the cement road surface after treating a base layer, and the other is joint filling by using epoxy resin, and the renovation method has the defects of high manufacturing cost, long construction period, no contribution to open traffic and the like; the epoxy resin joint filling method has the defects of poor adhesion with faults, easy falling, poor effect, poor aging resistance and the like, the curing time is long, the difference between the shrinkage and the expansibility of the material and a concrete material is large, the repair failure is easy to cause, and the repair effect is poor.
The carbon dioxide copolymer material is a green high polymer material which is prepared by taking carbon dioxide as a main raw material and synthesizing the carbon dioxide by a chemical method, and can be completely biodegraded. And is well utilized in disposable medical dressing, medical packaging material, disposable transfusion equipment and other medical materials.
The leftover bits and pieces of medical dressing based on the carbon dioxide copolymer have high regeneration utilization rate, high feasibility, no toxicity and no harm, and are suitable for development and research on application in the technical field of road repair, and also suitable for research on repair of damaged parts such as ceramic tiles, marbles and the like in public places. Therefore, it is necessary to invent a carbon dioxide copolymer recycled pavement and a preparation method thereof.
Disclosure of Invention
Therefore, the embodiment of the invention provides a pavement regenerant to solve the problem of difficulty in repairing damaged pavements in the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
one aspect of the invention provides a pavement recycling agent, which comprises the following components in parts by weight:
50-100 parts of carbon dioxide copolymer
10-20 parts of fiber material
And 1-5 parts of a nano filler.
The carbon dioxide copolymer is a green high polymer material which is synthesized by a chemical method by taking carbon dioxide as a main raw material, and is non-toxic and harmless. Furthermore, the carbon dioxide copolymer can be effectively combined with the wound surface of a diseased road, so that the carbon dioxide copolymer is particularly suitable for being used as a pavement regenerant.
Preferably, the carbon dioxide copolymer has a number average molecular weight of 3 to 16 ten thousand.
Preferably, the carbon dioxide copolymer comprises carbon dioxide copolymer medical dressing trim.
The carbon dioxide copolymer is widely applied to the medical field due to the characteristics of being green, non-toxic and capable of being completely explained, is commonly used as medical dressing, packaging material, transfusion equipment and the like, and therefore, a large amount of leftovers can be generated in the production of the medical dressing and other related material fields. The pavement regenerant can use medical dressing leftovers in any proportion as a raw material source of the carbon dioxide copolymer.
Preferably, the fibrous material is a natural fibrous material.
Preferably, the natural fiber material is selected from at least one of basalt fiber, carbon fiber, straw stalk fiber, corn stalk fiber.
The fiber material can increase the toughness of the pavement regenerant provided by the invention, and in practical application, the repaired pavement can be more durable. The invention adopts natural fiber materials, has low raw material cost, wherein the straw stalks and the corn stalks belong to agricultural wastes, provides a new scheme for treating the wastes, and is beneficial to energy conservation and environmental protection.
Preferably, the fiber material is a mixture of basalt fibers, carbon fibers, straw stalk fibers and corn stalk fibers, and the weight ratio of the components in the mixture is basalt fibers: carbon fiber: straw stalk fiber: corn stalk fiber (1-3): (0.5-2): (4-6): (4-6).
Preferably, the nanofiller is nanosilica.
Other nanofillers with similar properties, such as nano-titania, may also be employed in the process of the present invention.
Another aspect of the present invention provides a method for preparing the pavement recycling agent, comprising the steps of:
1) crushing and dissolving the carbon dioxide copolymer in a solvent to form a solution A, wherein the solvent is ethyl acetate or dimethyl carbonate;
2) uniformly mixing the fiber material and the nano filler, adding the solution A obtained in the step 1), and jointly stirring to form a mixture B.
Another aspect of the present invention provides a method for regenerating a damaged pavement using the pavement regenerating agent prepared by the method, the method comprising the steps of:
i) cutting off pavement materials around the damaged part of the damaged pavement and crushing the pavement materials into particles P;
ii) stirring the particles P, adding the solution A, stirring together, adding the mixture B, and continuously stirring to obtain a paving material;
iii) spreading the paving material on the damaged part, and scraping and compacting.
Preferably, the solution a is used to wet the damaged pavement before step iii) is carried out and is sprayed again after step iii) is completed.
The technical scheme of the invention has the following advantages:
1. the invention realizes the comprehensive utilization of waste materials, is green and environment-friendly, is easy to obtain, has low cost, reasonable formula, simple and reliable preparation method and easy construction, and is suitable for various cement pavements, asphalt pavements, airport pavements, rush repairs and conventional repairs.
2. The combination mode of the repairing material and the original pavement is penetration combination and gluing combination, so that the combination capability of the repairing material and the damaged pavement is greatly enhanced, meanwhile, the repairing period is short, the compressive strength is high, the cold resistance and high temperature resistance are realized, the color can be adjusted after repairing, and the function of slowing down the expansion caused by heat and the contraction caused by cold of the pavement is realized.
Drawings
Fig. 1 is a photograph of a damaged pavement.
Fig. 2 is a photograph after restoration of a damaged pavement.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
1. Cutting a blocky carbon dioxide copolymer raw material with the number average molecular weight of 3-16 ten thousand into blocks with the diameter of less than 8cm by using a rubber cutter, and crushing the cut blocky carbon dioxide copolymer into particles with the diameter of less than 3mm by using a crusher; crushing the carbon dioxide copolymer medical dressing leftovers into fragments by using a crusher, and enabling the areas of the medical dressing leftovers to be less than 25mm2。
2. 30kg of carbon dioxide copolymer raw material particles, 50kg of carbon dioxide copolymer medical dressing leftover fragments, 200kg of ethyl acetate (or dimethyl carbonate), 2kg of basalt fibers, 1kg of carbon fibers, 5kg of straw stalk fibers, 5kg of corn stalk fibers and 2kg of nano silicon dioxide are respectively weighed by an electronic scale. Starting a stirring kettle, stirring at 300r/min, firstly pouring ethyl acetate (or dimethyl carbonate) into the stirring kettle, adding 30kg of carbon dioxide copolymer raw material particles under the condition of stirring, stirring for 3-6 hours until the particles are completely dissolved, then pouring 30kg of recovered carbon dioxide copolymer waste fragments into an emulsifying tank, continuously stirring until the particles are completely dissolved, closing the stirring kettle, soaking for 24 hours, then starting a stirrer to stir for 1 hour, pouring 20kg of the remaining carbon dioxide copolymer medical dressing leftovers into the stirring tank, and stirring until the particles are completely dissolved. Preparing a carbon dioxide copolymer ethyl acetate (or dimethyl carbonate) solution A;
3. stripping the damaged part of the damaged pavement, and cutting the stripped damaged pavement into blocks with the area less than 10cm by using a rubber cutter; then, the cut blocks are crushed into particles by a crusher.
4. Weighing 600kg of diseased pavement particles P, pouring into a stirrer, stirring for 5 minutes, pouring 100kg of weighed carbon dioxide copolymer ethyl acetate (or dimethyl carbonate) solution, stirring for 5 minutes together, finally pouring 2kg of basalt fibers, 1.5kg of carbon fibers, 5kg of straw stalk fibers, 5kg of corn stalk fibers and 2kg of nano-silica into the stirrer, stirring for 5 minutes together, uniformly stirring to form a mixture, and taking out the mixture, wherein the material at this time is the paving material based on the carbon dioxide copolymer waste.
5. Cleaning the pavement at the diseased part, spraying a carbon dioxide copolymer ethyl acetate (or dimethyl carbonate) solution with the concentration of 5-8% to completely wet the diseased pavement, drying for 10 minutes, spreading the mixture at the diseased part, scraping, compacting after 1 hour, spraying a carbon dioxide copolymer ethyl acetate (or dimethyl carbonate) solution with a certain concentration of 8-12%, and passing through the vehicle after 4 hours, wherein the pavement at the time is the carbon dioxide copolymer regenerated pavement.
Example 2
The road surface regeneration was carried out in the same manner as in example 1, except that the component ratio of the regenerating agent was changed. (see Table 1)
Example 3
The road surface regeneration was carried out in the same manner as in example 1, except that the component ratio of the regenerating agent was changed. (see Table 1)
Example 4
The road surface regeneration was carried out in the same manner as in example 1, except that the component ratio of the regenerating agent was changed. (see Table 1)
TABLE 1 pavement regenerant composition Table
Examples of the experiments
The properties of the pavement regenerated in example 1 were measured and the results are shown in Table 2
TABLE 2 test results of recycled pavement properties
The test results of the pavements regenerated in examples 2-4 were in accordance with the standards in the table above. Fig. 1 and 2 show a comparison of road surface conditions before and after regeneration in example 1, and it can be seen that the road surface regeneration effect is good.
The detection results of the above embodiments show that the compressive strength, stability, elastic modulus and flexural strength of the regenerated pavement of the embodiments of the invention meet the use requirements, the bonding strength with the original pavement is as high as that, and the capacity of combining with the damaged pavement is greatly enhanced compared with the common regeneration method.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (4)
1. The preparation method of the pavement regenerant is characterized by comprising the following steps of:
1) crushing and dissolving the carbon dioxide copolymer in a solvent to form a solution A, wherein the solvent is ethyl acetate or dimethyl carbonate;
2) uniformly mixing a fiber material and a nano filler, adding the solution A obtained in the step 1), and jointly stirring to form a mixture B;
wherein the carbon dioxide copolymer, the fiber material and the nano filler are calculated according to the following parts by weight:
50-100 parts of carbon dioxide copolymer
10-20 parts of fiber material
1-5 parts of a nano filler;
the number average molecular weight of the carbon dioxide copolymer is 3-16 ten thousand; the carbon dioxide copolymer comprises carbon dioxide copolymer medical dressing leftovers;
the fiber material is a mixture of basalt fibers, carbon fibers, straw stalk fibers and corn stalk fibers, and the weight ratio of the components in the mixture is as follows: carbon fiber: straw stalk fiber: corn stalk fiber (1-3): (0.5-2): (4-6): (4-6).
2. The pavement recycling agent according to claim 1, wherein the nano-filler is nano-silica.
3. A method for regenerating a damaged pavement using the pavement regenerating agent according to claim 1, comprising the steps of:
i) cutting off pavement materials around the damaged part of the damaged pavement and crushing the pavement materials into particles P;
ii) stirring the particles P, adding the solution A, stirring together, adding the mixture B, and continuously stirring to obtain a paving material;
iii) spreading the paving material on the diseased site, and scraping and compacting.
4. The method for regenerating a diseased road surface according to claim 3, characterized in that the diseased road surface is wetted with solution A before step iii) is carried out and solution A is sprayed again after step iii) is completed.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007217611A (en) * | 2006-02-17 | 2007-08-30 | Dainichiseika Color & Chem Mfg Co Ltd | Biodegradable resin composition and molded product |
| CN106739346A (en) * | 2017-01-17 | 2017-05-31 | 广东工业大学 | A kind of polyurethane pavement |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007217611A (en) * | 2006-02-17 | 2007-08-30 | Dainichiseika Color & Chem Mfg Co Ltd | Biodegradable resin composition and molded product |
| CN106739346A (en) * | 2017-01-17 | 2017-05-31 | 广东工业大学 | A kind of polyurethane pavement |
Non-Patent Citations (3)
| Title |
|---|
| 基于二氧化碳共聚物敷料应用的绿色医疗建设探索;华树成等;《中国医院管理》;20180405;第38卷(第4期);第66-67页 * |
| 玄武岩纤维在京承高速路面维修工程中的应用;穆岩等;《筑路机械与施工机械化》;20171210;第34卷(第12期);第91-95页 * |
| 纳米TiO2/CaCO3-玄武岩纤维复合改性沥青的路用性能;程永春等;《吉林大学学报(工学版)》;20180331;第48卷(第2期);第460-465页 * |
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