CN114015356A - Nano-cellulose modified SBR emulsified asphalt fog sealing material and preparation method and application thereof - Google Patents
Nano-cellulose modified SBR emulsified asphalt fog sealing material and preparation method and application thereof Download PDFInfo
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- CN114015356A CN114015356A CN202111403114.7A CN202111403114A CN114015356A CN 114015356 A CN114015356 A CN 114015356A CN 202111403114 A CN202111403114 A CN 202111403114A CN 114015356 A CN114015356 A CN 114015356A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D195/00—Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention relates to a nano-cellulose modified SBR emulsified asphalt fog sealing material, a preparation method and application thereof, wherein the nano-cellulose modified SBR emulsified asphalt fog sealing material comprises the following components in parts by weight: 0.6-1.8 parts of nano-cellulose, 6-7 parts of SBR (styrene butadiene rubber), 120 parts of asphalt, 1-2 parts of stabilizer, 4-5 parts of emulsifier and 80-90 parts of deionized water. Also discloses a specific preparation process flow of the modified emulsified asphalt material and the application of the modified emulsified asphalt material to the maintenance of a sand-free fog seal on a road surface. The nano-cellulose serving as a nano material has excellent mechanical properties such as high strength, high specific surface area and the like, and the emulsified asphalt is modified, so that the anti-rutting property, the fatigue property and the low-temperature property of the fog seal material can be obviously improved, and the problems of premature peeling and failure under the continuous action of natural factors and vehicle loads when the fog seal material is applied to pavement maintenance are avoided. The fog sealing material prepared by the invention can be widely applied to the pre-curing of road surfaces, and the nanocellulose is used as organic natural fiber, has degradability, and is green and environment-friendly.
Description
Technical Field
The invention belongs to the technical field of pavement engineering pre-maintenance.
Background
Under the continuous action of natural factors (sunlight, temperature and rainwater) and vehicle load, the asphalt pavement can generate early diseases such as micro-cracks, loose surface aggregate and the like, the running quality and the service life of the pavement are seriously influenced, and even traffic accidents are caused. Therefore, when early-stage damage occurs to the road surface, the road surface needs to be protected and maintained in time, the fog sealing layer is one of common road surface protection and maintenance measures, the early-stage damage can be effectively prevented, the early-stage damage can be treated in time, the further expansion of the early-stage damage can be prevented, and the service life of the road can be prolonged.
The fog sealing technology is the application of the most convenient construction and the fastest recovery of traffic service in preventive maintenance. The fog sealing technology is a maintenance technology for slightly spraying diluted emulsion on the surface of a pavement, and the maintenance principle is to infiltrate the emulsion into mutually communicated gaps and small cracks to prevent the erosion of the pavement by water. As an environment-friendly and economic maintenance technology, the material can effectively block micro cracks, reduce the water conductivity and the shrinkage rate, enrich road surface cementing materials, and reduce the service life degradation rate and the maintenance cost. The principle of the fog seal technology is relatively simple, but certain difficulty is brought to effective work of the fog seal under various road conditions, climatic environments and traffic conditions. The development and innovation of the fog sealing material are the key points of the fog sealing technology, wherein the application of (modified) emulsified asphalt is common. However,the mechanical strength, cohesion, water resistance, durability and other properties of the common emulsified asphalt Are often poor.The traditional fog sealing layer material is difficult to meet the requirement of highway pavement. Therefore, the development of a mist sealing material with excellent performance is imperative. It is necessary to develop an emulsified asphalt material with good performance for the fog sealing technology.
At present, no report is provided for directly applying the nano-cellulose modified SBR emulsified asphalt to the modification process of the fog seal material.
Disclosure of Invention
The invention provides a nanocellulose modified SBR emulsified asphalt fog sealing material and a preparation method and application thereof.
Technical scheme
A preparation method of a nano-cellulose modified SBR emulsified asphalt fog seal material is characterized in that,
the formula is designed as follows: the raw materials comprise, by mass, 0.6-1.8 parts of nanocellulose, 6-7 parts of SBR (styrene butadiene rubber), 120 parts of asphalt, 1-2 parts of a stabilizer, 4-5 parts of an emulsifier and 80-90 parts of deionized water. Namely: the mass fraction of the added nano-cellulose is 0.5-1.5%.
S1.80-90 parts of deionized water and 4-5 parts ofEmulsifier0.6-2 parts ofNano celluloseMixing with 1-2 parts of stabilizer, stirring, heating to 60-70 deg.C,preparing to obtain soap liquid(ii) a Is ready for use80 parts of soap solution;
s2, heating 120 parts of matrix asphalt to 140 ℃ and mixing with the matrix asphalt80 parts of soap solution6-7 parts ofSBR (styrene butadiene rubber)Stirring and mixing, and slowly injecting into a colloid mill; preheating the colloid mill to 90 ℃, standing the emulsion in a heat exchanger for 1 hour to prepare the nano-cellulose modified SBR emulsified asphalt fog seal material.
The nano-cellulose is nano wood pulp cellulose, nano cotton cellulose and other organic nano-celluloses.
The asphalt is 70# asphalt or 90# asphalt.
The emulsifier is a cationic emulsifier of cetyl trimethyl ammonium bromide or cetyl pyridine bromide.
The stabilizer is organic stabilizer sodium carboxymethyl cellulose and inorganic stabilizer calcium chloride.
Nanocellulose with a diameter in the range of 4-10nm is provided by the odd macro technology.
In step 1, the mixing process is carried out by manually stirring and then treating by using ultrasonic waves and a high-speed shearing stirrer.
Mixing process: firstly, manually stirring for 5min, then treating for 10-15min by adopting ultrasonic waves, and finally treating for 15-20min by using a high-speed shearing stirrer.
The material obtained by the preparation method.
The application of the nano-cellulose modified SBR emulsified asphalt fog sealing material comprises the following steps: when the nano-cellulose modified SBR emulsified asphalt is applied, a fog seal spraying vehicle (the equipment is the existing equipment in the field and is not designed by the invention) is used for uniformly spraying the prepared nano-cellulose modified SBR emulsified asphalt on a pavement, so that the maintenance work of the pavement is completed.
The fog seal layer is usually made of emulsified asphalt, and the further popularization of the fog seal layer technology is limited by the problems of insufficient strength and adhesion of the emulsified asphalt and the like. The nanocellulose has high strength, high specific surface area, degradability and excellent mechanical properties, and the nanocellulose is added into the emulsified asphalt to prepare the fog seal material, so that the adhesion and strength of the emulsified asphalt can be effectively improved, and the service life of the fog seal can be prolonged.
It is known in the art that when the nanocellulose and the emulsified asphalt are fused, a demulsification phenomenon is inevitably generated, so that the fluidity of a system is deteriorated, and the use performance of the modified emulsified asphalt is influenced, thereby limiting scientific research, development and exploration of researchers from the aspect of 'nanocellulose + emulsified asphalt'. The invention firstly tries to prepare nano-cellulose into soap solution containing nano-cellulose, and then carries out asphalt emulsification, and finally can prepare nano-cellulose modified SBR emulsified asphalt with better fluidity, thereby improving the storage stability of the nano-cellulose emulsified asphalt.
Compared with the prior art, the nano-cellulose modified SBR emulsified asphalt fog sealing material and the preparation method and application thereof have the following beneficial effects:
(1) the nano-cellulose is added in the preparation process of the emulsified asphalt, has good compatibility with the asphalt, can form a uniform and stable emulsion system after being mixed, has good fluidity at normal temperature, and is convenient for the construction of a fog sealing layer technology.
(2) The addition of the nano-cellulose can effectively form a fiber network in the asphalt, improve the strength of the emulsified asphalt and overcome the defect of insufficient strength of the fog sealing layer material.
(3) The addition of the nano-cellulose can improve the adhesion performance of the asphalt, can be effectively combined with the asphalt mixture of the pavement, seals the pores of the pavement, plays a role in water prevention and prolongs the service life of the pavement.
The nano-cellulose serving as a nano material has excellent mechanical properties such as high strength, high specific surface area and the like, and the emulsified asphalt is modified, so that the anti-rutting property, the fatigue property and the low-temperature property of the fog seal material can be obviously improved, and the problems of premature peeling and failure under the continuous action of natural factors and vehicle loads when the fog seal material is applied to pavement maintenance are avoided. The fog sealing material prepared by the invention can be widely applied to the pre-curing of road surfaces, and the nanocellulose is used as organic natural fiber, has degradability, and is green and environment-friendly.
Drawings
FIG. 1 is a graph comparing the fatigue factors of fog seal materials based on a dynamic shear rheometer for examples and comparative examples of the invention.
Detailed Description
The preparation method and the application of the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.
The invention will be further elucidated with reference to the drawings and examples.
Example 1
The modified emulsified asphalt fog sealing material wood pulp nano-cellulose of the embodimentThe mixing amount is 0 percent(the doping amount refers to the percentage of the nano-cellulose content in the asphalt).
Step S1, weighing 80 parts by mass of deionized water, 4 parts by mass of cetyl trimethyl ammonium bromide emulsifier and 1 part by mass of sodium carboxymethylcellulose stabilizer, manually stirring for 5min, then treating for 10-15min by adopting ultrasonic waves, and finally treating for 15-20min by using a high-speed shearing stirrer to prepare uniformly dispersed soap liquid;
step S2, weighing the raw materials according to parts by mass, heating 120 parts of No. 70 matrix asphalt to 135 ℃, mixing the heated raw materials with 80 parts of soap solution and 6 parts of SBR (styrene butadiene rubber) rubber through stirring, and slowly injecting the mixture into a colloid mill. Preheating the colloid mill to 90 ℃, standing the emulsion in a heat exchanger for 1 hour to prepare the SBR emulsified asphalt fog sealing material.
Example 2
The wood pulp nanocellulose content of the modified emulsified asphalt fog sealing material of the embodiment is 0.5% (the doping amount means the nanocellulose content accounts for the percentage of the asphalt).
Step S1, weighing 0.6 part of wood pulp nano cellulose, 80 parts of deionized water, 4 parts of hexadecyl trimethyl ammonium bromide emulsifier and 1 part of sodium carboxymethyl cellulose stabilizer by mass, manually stirring for 5min, then treating for 10-15min by adopting ultrasonic waves, and finally treating for 15-20min by using a high-speed shearing stirrer to prepare uniformly dispersed soap liquid;
step S2, weighing the raw materials according to parts by mass, heating 120 parts of No. 70 matrix asphalt to 135 ℃, mixing the heated raw materials with 80 parts of soap solution and 6 parts of SBR (styrene butadiene rubber) rubber through stirring, and slowly injecting the mixture into a colloid mill. Preheating the colloid mill to 90 ℃, standing the emulsion in a heat exchanger for 1 hour to prepare the nano-cellulose modified SBR emulsified asphalt fog seal material.
Example 3
The wood pulp nanocellulose content of the modified emulsified asphalt fog sealing material of the embodiment is 1% (the doping amount refers to the percentage of the nanocellulose content in the asphalt).
Step S1, weighing 1.2 parts of wood pulp nano cellulose, 80 parts of deionized water, 4 parts of hexadecyl trimethyl ammonium bromide emulsifier and 1 part of sodium carboxymethyl cellulose stabilizer by mass, manually stirring for 5min, treating for 10-15min by adopting ultrasonic waves, and finally treating for 15-20min by using a high-speed shearing stirrer to prepare uniformly dispersed soap liquid;
step S2, weighing the raw materials according to parts by mass, heating 120 parts of No. 70 matrix asphalt to 135 ℃, mixing the heated raw materials with 80 parts of soap solution and 6 parts of SBR (styrene butadiene rubber) rubber through stirring, and slowly injecting the mixture into a colloid mill. Preheating the colloid mill to 90 ℃, standing the emulsion in a heat exchanger for 1 hour to prepare the nano-cellulose modified SBR emulsified asphalt fog seal material.
Example 4
The wood pulp nanocellulose content of the modified emulsified asphalt fog sealing material of the embodiment is 1.5% (the doping amount means the nanocellulose content accounts for the percentage of the asphalt).
Step S1, weighing 1.8 parts of wood pulp nano cellulose, 80 parts of deionized water, 4 parts of hexadecyl trimethyl ammonium bromide emulsifier and 1 part of sodium carboxymethyl cellulose stabilizer by mass, manually stirring for 5min, treating for 10-15min by adopting ultrasonic waves, and finally treating for 15-20min by using a high-speed shearing stirrer to prepare uniformly dispersed soap liquid;
step S2, weighing the raw materials according to parts by mass, heating 120 parts of No. 70 matrix asphalt to 135 ℃, mixing the heated raw materials with 80 parts of soap solution and 6 parts of SBR (styrene butadiene rubber) rubber through stirring, and slowly injecting the mixture into a colloid mill. Preheating the colloid mill to 90 ℃, standing the emulsion in a heat exchanger for 1 hour to prepare the nano-cellulose modified SBR emulsified asphalt fog seal material.
Comparative example
Comparative example (no modification of SBR asphalt emulsion with nanocellulose), test pieces were made exactly the same as the test procedure and example 1. The nanocellulose modified SBR emulsified asphalt fog seal materials prepared in examples 1-4 were subjected to a dynamic shear rheology test and asphalt flexural creep stiffness measurements.
TABLE 1 Low temperature BBR test results
The results in FIG. 1 showThe addition of nanocellulose can significantly reduce the fatigue factor of SBR emulsified asphalt, probably due to the crosslinking effect of nanocellulose in asphalt, wherein, in example 31% Nano Wood pulp cellulose Shows optimum performance。As can be seen from Table 1With the addition of the nano-cellulose, the rigidity value of the fog seal material is reduced, and the m value is increased, which shows that the nano-cellulose can improve the low-temperature crack resistance of the SBR emulsified asphalt.
The nanocellulose modified emulsified asphalt fog seal material is subjected to actual pavement performance test, so that the friction of the pavement can be improved, the water seepage coefficient is reduced by 91.4%, and the impermeability of the pavement is remarkably improved.
In conclusion, the nano-cellulose modified SBR emulsified asphalt fog sealing material prepared by the invention can improve the problems of the existing fog sealing material, improve the fatigue performance, the low-temperature performance and the like, can obviously improve the anti-permeability performance of the pavement and has higher utilization value.
Claims (10)
1. A preparation method of a nano-cellulose modified SBR emulsified asphalt fog seal material is characterized in that,
the formula is designed as follows: the raw materials comprise (by mass) nano-cellulose 0.6-1.8 parts, SBR (styrene butadiene rubber) 6-7 parts, asphalt 120 parts, stabilizer 1-2 parts, emulsifier 4-5 parts and deionized water 80-90 parts;
S1.80-90 parts of deionized water and 4-5 parts ofEmulsifier0.6-2 parts ofNano celluloseMixing with 1-2 parts of stabilizer, stirring, heating to 60-70 deg.C,preparing to obtain soap liquid(ii) a Is ready for use80 parts of soap solution;
s2, heating 120 parts of matrix asphalt to 140 ℃ and mixing with the matrix asphalt80 parts of soap solution6-7 parts ofSBR (styrene butadiene rubber)Stirring and mixing, and slowly injecting into a colloid mill; preheating the colloid mill to 90 ℃, standing the emulsion in a heat exchanger for 1 hour to prepare the nano-cellulose modified SBR emulsified asphalt fog seal material.
2. The method of claim 1, wherein: the nano-cellulose is nano wood pulp cellulose, nano cotton cellulose and other organic nano-celluloses.
3. The method of claim 1, wherein: the asphalt is 70# asphalt or 90# asphalt.
4. The method of claim 1, wherein: the emulsifier is a cationic emulsifier of cetyl trimethyl ammonium bromide or cetyl pyridine bromide.
5. The method of claim 1, wherein: the stabilizer is organic stabilizer sodium carboxymethyl cellulose and inorganic stabilizer calcium chloride.
6. The method of claim 2, wherein: nanocellulose with a diameter in the range of 4-10nm is provided by the odd macro technology.
7. The method of claim 1, wherein: in step 1, the mixing process is carried out by manually stirring and then treating by using ultrasonic waves and a high-speed shearing stirrer.
8. The method of claim 7, wherein: mixing process: firstly, manually stirring for 5min, then treating for 10-15min by adopting ultrasonic waves, and finally treating for 15-20min by using a high-speed shearing stirrer.
9. A material obtained by the production method according to any one of claims 1 to 8.
10. Use of the nanocellulose-modified SBR emulsified asphalt fog seal material of claim 9:
when the nano-cellulose modified SBR emulsified asphalt is applied, the prepared nano-cellulose modified SBR emulsified asphalt is uniformly sprayed on a road surface by using a fog seal spraying vehicle, and the maintenance work of the road surface is completed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113549333A (en) * | 2021-08-16 | 2021-10-26 | 长沙新立硅材料科技有限公司 | Nano-cellulose and polymer composite modified thermoplastic asphalt material and preparation method thereof |
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