CN115322581B - Warm-mix heavy-load asphalt grouting material and preparation method thereof - Google Patents
Warm-mix heavy-load asphalt grouting material and preparation method thereof Download PDFInfo
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- CN115322581B CN115322581B CN202210945310.5A CN202210945310A CN115322581B CN 115322581 B CN115322581 B CN 115322581B CN 202210945310 A CN202210945310 A CN 202210945310A CN 115322581 B CN115322581 B CN 115322581B
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract
The invention discloses a warm mix heavy load asphalt grouting material and a preparation method thereof. The warm mix heavy duty asphalt grouting material comprises the following components in parts by weight: 50-90 parts of heavy-duty asphalt; 0.2 to 2.0 portions of surface active warm mix agent; 5-50 parts of floating beads. The warm mix heavy load asphalt grouting material prepared by the invention forms asphalt cement by the specific cooperation of the surface active warm mix agent and the floating beads, and compared with the traditional composite modified asphalt grouting material, the composite modulus of the grouting material can be effectively improved, and secondary void is delayed; the surface active warm mixing agent is adopted to reduce the viscosity, improve the fluidity of grouting materials, and reduce the construction temperature required by grouting.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to a warm mix heavy-duty asphalt grouting material and a preparation method thereof.
Background
Void is one of the common forms of failure of pavement structures, which can lead to dramatic decreases in pavement structure load-bearing capacity and a sudden decrease in service life. At present, the maintenance method for the road void mainly comprises two major types of replacement repair and grouting repair. The replacement repair has the advantages of large engineering quantity, high maintenance cost, long repair time and large interference to daily traffic; in contrast, the grouting repair technology adopts a non-excavation reinforcement mode, has short construction period and small influence on traffic, and is a typical rapid maintenance mode.
At present, grouting reinforcement materials commonly used in road engineering mainly comprise cement-based grouting materials, high polymer grouting materials, geopolymer grouting materials and asphalt grouting materials. Cement-based slurry has low cost, high stone strength and strong impermeability, but has the defects of poor stability, easy segregation, bleeding and precipitation, low injectability, long setting time and the like (research and application demonstration research report of road grouting reinforcement technology, university of the same economy, 2013) because of the characteristics of cement materials. The high polymer grouting material has higher price, and the raw material production process is easy to cause environmental pollution, thus being not suitable for large-scale popularization and application. The maintenance time of the geopolymer grouting is lower than that of cement-based grouting, but still 1 to 3 days are needed, the geopolymer grouting material is high in price, and the grouting effect is greatly influenced by geology and climate conditions (research and application of the geopolymer road grouting reinforcement technology, liu Jiangbo, 2013, 01, 145-149).
The novel pavement asphalt grouting technology is gradually applied to cement pavement reconstruction, and engineering experience shows that the novel pavement asphalt grouting technology can effectively eliminate the plate bottom void phenomenon and reduce the occurrence probability of asphalt pavement reflection cracks. The grouting speed of the asphalt grouting technology is high, the curing time after grouting is completed is short, only about 30 minutes is needed, and the traffic is hardly influenced. However, the polymer content of the hot asphalt grouting material at the present stage is high, the viscosity is high, the fluidity is poor, and a high construction temperature is often required. The high grouting construction temperature not only solves the problem of environmental pollution, but also has the risk of accidental injury of workers caused by overflow of melted underground pipelines and high-temperature asphalt. Meanwhile, the hot asphalt grouting material is generally a composite modified asphalt material, has low complex modulus and low deformation resistance, and has the phenomenon of secondary void after deformation.
Disclosure of Invention
The technical problem solved by the invention is to overcome the defects of weak deformation resistance, poor stability, high construction temperature and the like of the cured grouting material in the prior art, and provide a warm mix heavy load asphalt grouting material and a preparation method thereof. The warm mix heavy load asphalt grouting material prepared by the invention has the characteristics of low cost, low construction temperature, strong deformation resistance after hardening and the like under the condition of ensuring good stability and fluidity.
The invention solves the technical problems by the following technical proposal:
the invention provides a warm mix heavy duty asphalt grouting material, which comprises the following components in parts by weight:
50-90 parts of heavy-duty asphalt;
0.2 to 2.0 portions of surface active warm mix agent;
5-50 parts of floating beads.
The warm mix heavy duty asphalt grouting material is preferably composed of the following components in parts by weight:
50-90 parts of heavy-duty asphalt;
0.2 to 2.0 portions of surface active warm mix agent;
5-50 parts of floating beads.
In the invention, the mass ratio of the surface active warm-mix agent to the floating beads can be (0.4-40): 100, preferably (1 to 20): 100, more preferably 5:100 or 10:100.
in the invention, the mass ratio of the surface active warm mix agent to the heavy-duty asphalt can be (0.22-4): 100, preferably (1 to 1.5): 100, more preferably 1.12:100 or 1.27:100.
in the invention, the mass ratio of the floating beads to the heavy-duty asphalt can be (5.56-100): 100, preferably (8 to 30): 100, more preferably 11.2:100 or 25.3:100.
in the present invention, the surface active warm-mix agent may be a road surface active warm-mix agent conventional in the art, preferably an ammonium salt and/or quaternary ammonium salt type cationic road surface active warm-mix agent.
In the present invention, the floating beads may be conventional in the art, preferably fly ash floating beads. The fly ash floating beads are generally fly ash hollow spheres, and mainly comprise silicon dioxide and aluminum oxide.
The mesh number of the floating beads is preferably 100 to 200 mesh.
The density of the floating beads is 0.7-0.9 g/cm 3 。
In the invention, the heavy-duty asphalt can be special modified asphalt which is applied to dense-graded asphalt mixture, has performance graded up to PG88-28, can obviously improve the capability of road surface for resisting heavy traffic load, and can obviously prolong the service life of the road.
In the invention, the heavy-duty asphalt raw material composition comprises the following components in parts by weight:
2-10 parts of SBS modifier;
2-10 parts of solubilizer;
0.1-1 part of stabilizer;
60-90 parts of matrix asphalt;
6-20 parts of natural rock asphalt.
The heavy-duty asphalt raw material composition is preferably composed of the following components in parts by weight:
2-10 parts of SBS modifier;
2-10 parts of solubilizer;
0.1-1 part of stabilizer;
60-90 parts of matrix asphalt;
6-20 parts of natural rock asphalt.
Wherein the mass ratio of the natural rock asphalt to the matrix asphalt may be (6.67-33.3): 100, preferably (10 to 20): 100, more preferably 16:100.
wherein the SBS modifier may be conventional in the art, preferably a styrene-butadiene-styrene triblock copolymer. The SBS modifier is preferably star-shaped in structure.
Wherein the solubilizing agent may be conventional in the art, preferably an aromatic oil. The aromatic hydrocarbon content in the aromatic hydrocarbon oil is more than or equal to 85%, the ash content is less than or equal to 0.05%, the moisture content is less than or equal to 0.01%, the solidifying point is less than 5 ℃, and the flash point is more than or equal to 220 ℃.
Wherein, the stabilizer can be conventional in the art, and is preferably nano sulfur powder. Preferably, the nano sulfur powder is domestic nano sulfur powder.
The particle size of the nano sulfur powder can be conventional in the art, and is preferably less than or equal to 50nm.
Wherein the natural rock asphalt may be conventional in the art.
The mesh size of the natural rock asphalt may be conventional in the art, preferably 80 to 200 mesh. The softening point of the natural rock asphalt may be conventional in the art, preferably ≡150 ℃. The ash content of the natural rock asphalt may be conventional in the art, preferably +.20%.
The heavy-duty asphalt raw material composition preferably comprises the following components in parts by weight:
6 parts of SBS modifier, 6.5 parts of solubilizer, 0.5 part of stabilizer, 75 parts of A-70 matrix asphalt and 12 parts of natural rock asphalt.
The heavy-duty asphalt raw material composition is more preferably composed of the following components in parts by weight:
6 parts of SBS modifier, 6.5 parts of solubilizer, 0.5 part of stabilizer, 75 parts of A-70 matrix asphalt and 12 parts of natural rock asphalt.
In a preferred embodiment of the invention, the warm mix heavy duty asphalt grouting material comprises the following components in parts by weight:
70 to 90 parts of heavy asphalt, 0.7 to 1.5 parts of surface active warm mix agent and 5 to 25 parts of floating beads.
In a more preferred embodiment of the invention, the warm mix heavy duty asphalt grouting material comprises the following components in parts by weight:
70 to 90 parts of heavy asphalt, 0.7 to 1.5 parts of surface active warm mix agent and 5 to 25 parts of floating beads.
In a preferred embodiment of the invention, the warm mix heavy duty asphalt grouting material comprises the following components in parts by weight:
89 parts of heavy asphalt, 1.0 part of surface active warm mix agent and 10 parts of floating beads.
In a more preferred embodiment of the invention, the warm mix heavy duty asphalt grouting material comprises the following components in parts by weight:
89 parts of heavy asphalt, 1.0 part of surface active warm mix agent and 10 parts of floating beads.
In a preferred embodiment of the invention, the warm mix heavy duty asphalt grouting material comprises the following components in parts by weight:
79 parts of heavy asphalt, 1.0 part of surface active warm mix agent and 20 parts of floating beads.
In a more preferred embodiment of the invention, the warm mix heavy duty asphalt grouting material comprises the following components in parts by weight:
79 parts of heavy asphalt, 1.0 part of surface active warm mix agent and 20 parts of floating beads.
The invention also provides a preparation method of the warm mix heavy duty asphalt grouting material, which comprises the following steps: and mixing the components of the warm mix heavy duty asphalt grouting material.
In the invention, the preparation method of the warm mix heavy duty asphalt grouting material preferably comprises the following steps: heating the heavy-duty asphalt and the floating beads, then adding the surface active warm-mix agent, mixing, and fully stirring.
Wherein the heating is generally carried out in a stirred tank.
Wherein the temperature of the heating is preferably 160-180 ℃, e.g. 170 ℃.
Wherein the mixing time is preferably 20 to 30 minutes.
Wherein, the heavy-duty asphalt can be prepared as follows:
(1) Adding SBS modifier into the preheated matrix asphalt to sequentially swell and shear;
(2) Adding a solubilizer and a stabilizer for shearing;
(3) Adding natural rock asphalt for fully mixing;
(4) And (3) carrying out static development on the mixture obtained in the step (3).
In step (1), the temperature of the preheating may be 130 to 150 ℃, preferably 150 ℃.
In step (1), the swelling time may be 10 to 20 minutes, preferably 10 minutes.
In step (1), the shearing is typically performed in a high-speed shear dispersing emulsifying machine.
In step (1), the rotational speed of the shearing may be 3000 to 5000 rpm, preferably 5000 rpm.
In step (1), the time of the shearing may be 40 to 60 minutes, preferably 60 minutes.
In step (2), the rotational speed of the shearing is preferably 5000 revolutions per minute.
In the step (2), the shearing time may be 10 to 20 minutes.
In step (2), the addition sequence of the solubilizer and the stabilizer is preferably that of the solubilizer before the stabilizer.
In step (2), the shearing is preferably 10 minutes after the addition of the solubilizing agent and 10 minutes after the addition of the stabilizing agent.
In step (3), the temperature of the mixing may be 160 to 180 ℃, preferably 180 ℃.
In step (3), the mixing time may be 20 to 30 minutes, preferably 30 minutes.
In the step (3), the natural rock asphalt is preferably added while stirring at a position close to the intermediate vortex.
The rotational speed of the stirring is preferably 1500 revolutions per minute.
The stirring time is preferably 30 minutes.
In step (3), the addition time of the natural rock asphalt is preferably less than 5 minutes.
In step (4), the development is preferably carried out in an oven.
In step (4), the temperature of the development may be 150 to 170 ℃, preferably 160 ℃.
In step (4), the development time may be 6 to 10 hours, preferably 6 hours.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.
The reagents and materials used in the present invention are commercially available.
The invention has the positive progress effects that:
(1) According to the invention, asphalt cement is formed through the specific matching action of the surface active warm-mix agent and the floating beads, and compared with the traditional composite modified asphalt grouting material, the complex modulus of the grouting material can be effectively improved, and secondary void is delayed; the surface active warm mixing agent is adopted to reduce the viscosity, improve the fluidity of grouting materials and reduce the construction temperature required by grouting; the density of the adopted floating beads is small (0.7-0.9 g/cm) 3 ) Compared with the common limestone mineral powder (2.7-2.8 g/cm) 3 ) The floating beads are used as mineral filler, have small density difference with asphalt, and are not easy to be mixed with asphalt (1.0-1.1 g/cm 3 ) Precipitation segregation occurs, so that the blockage of the grouting device can be avoided; meanwhile, the floating beads are industrial waste residues, and the application and popularization of the floating beads are beneficial to promoting the comprehensive utilization of waste resources.
(2) Further, the adopted natural rock asphalt and floating beads are all sold in the market and have low price; the natural rock asphalt is used as the supplement of matrix asphalt, the price is lower than that of the matrix asphalt, and the cost can be effectively reduced; compared with the traditional asphalt grouting material, the grouting material has the advantage that the material cost is reduced by 13-67%.
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention. The experimental methods, in which specific conditions are not noted in the following examples, were selected according to conventional methods and conditions, or according to the commercial specifications.
In the following examples and comparative examples:
matrix asphalt: middle petrochemical AH-70# asphalt;
surface active warm mix agent: shanghai Fu LYE-WMA;
floating bead: fly ash floating beads with 100-200 meshes;
natural rock asphalt: illite natural rock asphalt (ash content < 20%), telida refined lake asphalt (TLA) offered by Shanghai highway bridges (group) limited;
stabilizing agent: domestic nano sulfur powder;
aromatic oil: aromatic hydrocarbon content is more than or equal to 85%, ash content is less than or equal to 0.05%, moisture content is less than or equal to 0.01%, solidifying point is less than 5 ℃, flash point is more than or equal to 220 ℃ and solidifying point is lower than 5 ℃.
In the following examples 1 to 2 and comparative examples 1 to 3, the raw material composition of the heavy-duty asphalt, in parts by weight, is composed of the following components: 6 parts of SBS modifier, 6.5 parts of aromatic oil, 0.5 part of stabilizer, 75 parts of A-70 matrix asphalt and 12 parts of natural rock asphalt.
The preparation method of the heavy-duty asphalt comprises the following steps:
1. preheating 75 parts by weight of A-70 matrix asphalt for 2 hours at 150 ℃, adding 6 parts by weight of SBS modifier to swell for 10 minutes, and shearing for 60 minutes at 160-180 ℃ by using a high-speed shearing dispersion emulsifying machine at a rotation speed of 5000 r/min;
2. then 6.5 parts by weight of solubilizer are added and sheared for 10 minutes at 5000 rpm, followed by 0.5 parts by weight of stabilizer for 10 minutes;
3. then, 12 parts by weight of natural rock asphalt (added within 5 minutes) was slowly and uniformly added at 180℃with stirring at a position close to the intermediate vortex, and stirred at a rotational speed of 1500 rpm for 30 minutes.
4. And (3) standing and developing the stirred sample in a 160 ℃ oven for 6 hours to finish the preparation of the heavy-duty asphalt.
Example 1
The warm mix heavy duty asphalt grouting material comprises the following components in parts by weight:
89 parts of heavy asphalt, 1.0 part of surface active warm mix agent and 10 parts of floating beads.
The preparation method of the warm mix heavy duty asphalt grouting material comprises the following steps:
the prepared 89 weight parts of heavy asphalt and 10 weight parts of floating beads are heated to 170 ℃ and put into a mixing pot, 1 weight part of surface active warm-mix agent is added immediately, and the mixture is fully mixed for 30 minutes to complete the preparation.
Example 2
The warm mix heavy duty asphalt grouting material comprises the following components in parts by weight:
79 parts of heavy asphalt, 1.0 part of surface active warm mix agent and 20 parts of floating beads.
The preparation method of the warm mix heavy duty asphalt grouting material comprises the following steps:
the prepared 79 parts by weight of heavy asphalt and 20 parts by weight of floating beads are heated to 170 ℃ and put into a mixing pot, 1 part by weight of surface active warm-mix agent is added immediately, and the mixture is fully mixed for 30 minutes to complete the preparation.
Comparative example 1
The warm mix heavy duty asphalt grouting material comprises the following components in parts by weight:
89 parts of heavy asphalt and 10 parts of floating beads.
The preparation method of the warm mix heavy duty asphalt grouting material comprises the following steps:
the prepared 89 parts by weight of heavy asphalt and 10 parts by weight of floating beads are heated to 170 ℃ and put into a mixing pot to be fully mixed for 30 minutes to finish the preparation.
Comparative example 2
The warm mix heavy duty asphalt grouting material comprises the following components in parts by weight:
89 parts of heavy asphalt and 10 parts of limestone mineral powder.
The preparation method of the warm mix heavy duty asphalt grouting material comprises the following steps:
the prepared 89 weight parts of heavy asphalt and 10 weight parts of limestone mineral powder are heated to 170 ℃ and put into a mixing pot to be fully mixed for 30 minutes to finish the preparation.
Comparative example 3
The warm mix heavy duty asphalt grouting material comprises the following components in parts by weight:
89 parts of heavy asphalt, 1.0 part of surface active warm mix agent and 10 parts of limestone mineral powder.
The preparation method of the warm mix heavy duty asphalt grouting material comprises the following steps:
the prepared 89 weight parts of heavy asphalt and 10 weight parts of limestone mineral powder are heated to 170 ℃ and put into a mixing pot, 1 weight part of surface active warm-mix agent is added immediately, and the mixture is fully mixed for 30 minutes to complete the preparation.
Comparative example 4
The traditional asphalt grouting material 1 comprises the following components in parts by weight: 4.5 parts of SBS modifier, 0.5 part of stabilizer, 75 parts of A-70 matrix asphalt and 20 parts of Trinidar lake asphalt.
The preparation method of the traditional asphalt grouting material 1 comprises the following steps:
1. preheating 75 parts by weight of A-70 matrix asphalt at 150 ℃ for 2 hours, adding 4.5 parts by weight of SBS modifier to swell for 10 minutes, and shearing for 60 minutes at 170 ℃ by using a high-speed shearing dispersion emulsifying machine at a rotation speed of 5000 revolutions per minute;
2. subsequently adding 0.5 parts by weight of stabilizer and shearing for 10 minutes at a rotation speed of 5000 rpm;
3. then, 20 parts by weight of Trinida lake asphalt (added within 5 minutes) was slowly and uniformly added at 180℃with stirring at a position close to the middle vortex, and stirred at 1500 rpm for 30 minutes.
4. And (3) standing and developing the stirred sample in a 160 ℃ oven for 6 hours to finish the preparation of the traditional grouting material 1.
Comparative example 5
The traditional asphalt grouting material 2 comprises the following components in parts by weight: 6 parts of 791-H type SBS modifier, 2 parts of aromatic oil, 2 parts of hydroxyethyl ethylene bis stearamide and 90 parts of A-10 matrix asphalt.
The preparation method of the traditional asphalt grouting material 2 comprises the following steps:
1. preheating 90 parts by weight of A-10 matrix asphalt at 180 ℃ for 2 hours, adding 2 parts by weight of aromatic oil and 6 parts by weight of 791-H type SBS modifier to swell for 10 minutes, and shearing for 30 minutes at 170 ℃ by using a high-speed shearing dispersion emulsifying machine at a rotation speed of 5000 revolutions per minute;
4. adding 2 parts by weight of hydroxyethyl ethylene bis stearamide, and fully mixing for 60 minutes to complete the preparation of the traditional grouting material 2.
Effect example 1
According to the embodiment of the effect, the grouting temperature of the warm mix heavy load asphalt grouting material is lower than that of the traditional grouting material. The comparative grouting materials were prepared by referring to examples 1 and 2, and comparative grouting materials were prepared according to comparative examples 1 to 4, and rotational viscosity tests of the grouting materials were performed, and the results of the related tests at three different temperatures of 150 c, 165 c and 180 c were measured using a brookfield viscometer, as shown in table 1 below.
TABLE 1 viscosity number comparison (Pa.s) of Warm mix heavy load asphalt grouting materials at different temperatures and conventional grouting materials
From the comparison results in the table above, the following conclusions can be drawn:
(1) When the surface active warm-mix agent exists together with the floating beads, a good viscosity reduction effect can be achieved on the grouting material. From example 1 and comparative example 1, it is apparent that the viscosity reducing effect on asphalt is not obvious when only floating beads are added and no surface active warm mix agent is added.
(2) The compatibility of the surface active warm-mix agent and the mineral filler is different. When the mineral filler is floating beads, the surface active warm-mix agent forms an interface lubricating film on the surfaces of the floating beads, so that the viscosity reduction effect on asphalt cement is achieved. The surface active warm-mix agent has compatibility with the floating beads, so that the surface active warm-mix agent can interact with the floating beads. As can be seen from example 1 and comparative example 3, when the floating beads are replaced with limestone mineral powder, the viscosity of the warm mix heavy load grouting material prepared by the method is lower than that of the warm mix grouting material prepared by the limestone mineral powder, which also shows that the viscosity reduction effect of the warm mix heavy load grouting material is more obvious due to the addition of the floating beads. It can also be seen from the comparison of example 1 with comparative examples 2 and 3 that the effect of the surfactant warm mix on different mineral fillers is different, and that not all kinds of mineral fillers can achieve a good viscosity reduction effect.
(3) The floating bead mixing amount of the conventional grouting material 1 (comparative example 4) corresponding to the warm mix heavy duty asphalt grouting material under the same viscosity condition can be obtained through linear interpolation. When the mixing amount of the floating beads is 12.3-16.5%, the viscosity of the warm-mix heavy-duty grouting material is equal to the viscosity value of the traditional grouting material at the same temperature. The viscosity value is better when the mixing amount of the floating beads is lower than the mixing amount range, and the floating beads have better fluidity and injectability.
Effect example 2
The comparative grouting material 1 (75% base asphalt+4.5% SBS+20% lake asphalt+0.5% stabilizer) was prepared with reference to examples 1 and 2, and the complex modulus was tested by performing a Dynamic Shear Rheological (DSR) test. At constant loading frequency, the complex modulus of 58 ℃ and 64 ℃ of two asphalt grouting materials was obtained by temperature scan test, as shown in table 2 below. The warm mix heavy duty asphalt grouting material has higher hardness through comparison.
Table 2 two warm mix heavy duty asphalt grouting materials and conventional asphalt grouting materials 58 ℃ and 64 ℃ complex modulus
| Grouting material | Complex modulus/kPa at 58 DEG C | Complex modulus at 64 ℃/kPa |
| Examples1 | 26.54 | 16.05 |
| Example 2 | 34.21 | 20.33 |
| Comparative example 4 | 24.95 | 13.96 |
As can be seen from the table, the warm mix heavy duty asphalt of the invention has complex modulus at 58 ℃ and 64 ℃ which are superior to the traditional grouting material under different mixing amounts of floating beads, and has higher complex modulus along with the rising of the mixing amount of the floating beads. The floating bead mixing amount range of the heavy load asphalt grouting material with the same viscosity in the example 2 is referred, and the 58 ℃ complex modulus is 28.3 kPa-31.6 kPa and the 64 ℃ complex modulus is 17.0 kPa-18.9 kPa under the corresponding floating bead mixing amount range is obtained by linear interpolation. Compared with the traditional grouting material, the composite modulus of 58 ℃ is improved by 13.48-26.52%, and the composite modulus of 64 ℃ is improved by 22.06-35.06%, so that the composite modulus of the warm mix heavy-duty asphalt grouting material under the same fluidity condition is obviously improved, and the cured asphalt grouting material has better deformation resistance.
Effect example 3
(1) Measurement of penetration: pitch penetration refers to the depth of vertical penetration of a standard spike loaded with 100g at 25℃for 5 seconds, as determined according to the method of the pitch penetration test of T0604-2011. Since the unit of asphalt penetration is 0.1mm, the asphalt penetration of the present invention is a value obtained by multiplying 10 on the basis of the depth.
(2) Determination of softening Point: according to the test method of asphalt softening point (ring ball method) of T0606-2011, namely, a sample is injected into a copper ring with a specified size, a steel ball is placed right above the copper ring after the specified temperature is kept at 5 ℃ for at least 15 minutes, a stirrer is started to heat, the water temperature is adjusted to rise to 5+/-0.5 ℃ per minute within 3 minutes, and the rising temperature value per minute is recorded; when the test specimen is softened by heating and gradually falls down until contacting with the surface of the underlying floor, the temperature value is read and recorded as the softening point.
(3) Determination of the difference in softening points after 48 h: the difference between softening points of the grouting asphalt after 48 hours was measured according to the "T0661-2011 polymer modified asphalt segregation test".
(4) Determination of the viscosity: viscosity the viscosity of the slip asphalt at 180℃was determined according to the asphalt kinematic viscosity test (capillary method) of T0619-2011.
(5) Determination of diffusion radius: the diffusion radius is measured by a conventional method in the art, namely, starting at the periphery of a grouting hole by 1m, sampling every 30cm drill cores outwards, checking whether grouting asphalt arrives, and sequentially increasing outwards after the grouting asphalt arrives until the grouting asphalt reaches the limit, and recording as the grouting diffusion radius.
The properties of the asphalt grouting materials prepared in examples 1 to 2 and comparative examples 1 to 5 of the present invention are shown in Table 3.
Table 3 grouting material performance comparison
As can be seen from the table, the viscosity value of the warm mix heavy duty asphalt grouting material prepared by the embodiment of the invention at 180 ℃ is below 1.7 Pa.s, and the smaller the viscosity value, the better the fluidity of the grouting material prepared. Although the 180℃viscosity value of comparative example 4 is also small, the penetration is large, so that the deformation resistance of the grouting material is poor.
The diffusion radius of the warm mix heavy duty asphalt grouting material prepared by the embodiment of the invention is more than 1.82m, and the larger diffusion radius ensures that the grouting material has better fluidity. Meanwhile, the softening point of the warm mix heavy duty asphalt grouting material prepared by the embodiment of the invention is above 98 ℃, and the larger the softening point is, the better the deformation resistance is, and the secondary void is not easy to occur.
The 48h softening point difference of the warm mix heavy duty asphalt grouting material prepared by the embodiment of the invention is below 1.5 ℃, the softening point difference is small, and the grouting material is not easy to segregate and block. Although the difference in softening points is small in comparative example 4, the penetration is large and the diffusion radius is small.
The penetration degree of the warm mix heavy duty asphalt grouting material prepared by the embodiment of the invention is below 12.1mm, and the smaller the penetration degree is, the better the deformation resistance of the grouting material is, and the secondary void is not easy to occur. Although the penetration of comparative example 5 was only 8.0mm, the viscosity value at 180℃was large and the fluidity of the grouting material was poor.
The density of the floating beads in the invention is small (0.7-0.9 g/cm) 3 ) Compared with the common limestone mineral powder (2.7-2.8 g/cm) 3 ) The floating beads are used as mineral filler, have small density difference with asphalt, and are not easy to be mixed with asphalt (1.0-1.1 g/cm 3 ) Precipitation segregation occurs, so that the blockage of the grouting device can be avoided; meanwhile, the floating beads are industrial waste residues, and the application and popularization of the floating beads are beneficial to promoting the comprehensive utilization of waste resources.
Effect example 4
To clarify the price difference between the new grouting material and the traditional grouting material, the following is exemplified:
the warm mix heavy duty asphalt grouting material comprises the following components in 100 parts by weight: 50 to 90 parts of heavy-duty asphalt, 0.2 to 1.0 part of surface active warm mix agent and 10 to 50 parts of floating beads; wherein, based on 100 parts by weight, the heavy-duty asphalt comprises the following components: 60 to 90 parts of A-70 matrix asphalt, 2 to 10 parts of SBS modifier, 6 to 20 parts of natural rock asphalt, 2 to 10 parts of aromatic hydrocarbon oil and 0.1 to 0.5 part of nano sulfur stabilizer, and the prices of the raw materials are shown in the following table.
TABLE 4 price list of raw materials
The price of the warm mix heavy duty asphalt grouting material of the present invention per ton weight can be calculated from the prices in table 4 to be about 2841 yuan to 4205 yuan.
The conventional asphalt grouting material 1 according to comparative example 4 has the following main components: the A-70 matrix asphalt is about 3000 yuan/ton, the SBS modifier is about 14000 yuan/ton, the Trinida lake asphalt is about 7500 yuan/ton, and the nano sulfur stabilizer is about 3000 yuan/ton. It is thus possible to calculate the price per ton of conventional asphalt grouting material 1 to be about 4770 yuan. By comparison, the novel grouting material has 13-67% lower material cost compared with the traditional asphalt grouting material 1 under the condition of ensuring good fluidity and complex modulus of the grouting material.
The conventional asphalt grouting material 2 according to comparative example 5 has the following main components: the A-10 matrix asphalt is about 3400 yuan/ton, the SBS modifier is about 14000 yuan/ton, the aromatic oil is about 3200 yuan/ton, and the hydroxyethyl ethylene bis-stearamide is about 23000 yuan/ton. It can thus be calculated that the conventional asphalt grouting material 2 has a price of about 4424 yuan per ton. The comparison shows that the cost price of the novel grouting material is reduced by 5.0-35.8 percent compared with that of the traditional asphalt grouting material 2.
Claims (22)
1. The warm mix heavy load asphalt grouting material is characterized by comprising the following components in parts by weight: 70-90 parts of heavy-duty asphalt; 0.7-1.5 parts of a surface active warm-mix agent; 5-25 parts of floating beads;
the heavy-duty asphalt comprises the following raw material composition in parts by weight: 2-10 parts of SBS modifier; 2-10 parts of solubilizer; 0.1-1 part of stabilizer; 60-90 parts of matrix asphalt; 6-20 parts of natural rock asphalt.
2. The warm mix heavy duty asphalt grouting material according to claim 1, wherein the mass ratio of the surface active warm mix agent to the floating beads is (0.4-40): 100;
and/or the mass ratio of the surface active warm mix agent to the heavy-duty asphalt is (0.22-4): 100;
and/or the mass ratio of the floating beads to the heavy-duty asphalt is (5.56-100): 100;
and/or the surface active warm-mix agent is an ammonium salt and/or quaternary ammonium salt cationic road surface active warm-mix agent;
and/or the floating beads are fly ash floating beads.
3. The warm mix heavy duty asphalt grouting material according to claim 2, wherein the mass ratio of the surface active warm mix agent to the floating beads is (1-20): 100;
and/or the mass ratio of the surface active warm mix agent to the heavy-duty asphalt is (1-1.5): 100;
and/or the mass ratio of the floating beads to the heavy-duty asphalt is (8-30): 100.
4. the warm mix heavy duty asphalt grouting material of claim 3, wherein the mass ratio of said surface active warm mix agent to said floating beads is 5:100 or 10:100;
and/or the mass ratio of the surface active warm mix agent to the heavy duty asphalt is 1.12:100 or 1.27:100;
and/or the mass ratio of the floating beads to the heavy-duty asphalt is 11.2:100 or 25.3:100.
5. the warm mix heavy duty asphalt grouting material of claim 2, wherein the mesh number of the floating beads is 100-200 mesh.
6. The warm mix heavy duty asphalt grouting material of claim 2, wherein the density of the floating beads is 0.7-0.9 g/cm 3 。
7. The warm mix heavy duty asphalt grouting material of claim 1, wherein the heavy duty asphalt raw material composition comprises the following components in parts by weight: 6 parts of SBS modifier, 6.5 parts of solubilizer, 0.5 part of stabilizer, 75 parts of A-70 matrix asphalt and 12 parts of natural rock asphalt.
8. The warm mix heavy duty asphalt grouting material of claim 1, wherein the mass ratio of the natural rock asphalt to the matrix asphalt is (6.67-33.3): 100;
and/or, the SBS modifier is a styrene-butadiene-styrene triblock copolymer;
and/or the structure type of the SBS modifier is star-shaped;
and/or, the solubilizer is aromatic hydrocarbon oil;
and/or the stabilizer is nano sulfur powder;
and/or the mesh number of the natural rock asphalt is 80-200 meshes; the softening point of the natural rock asphalt is more than or equal to 150 ℃; the ash content of the natural rock asphalt is less than or equal to 20 percent.
9. The warm mix heavy duty asphalt grouting material of claim 8, wherein the mass ratio of the natural rock asphalt to the matrix asphalt is (10-20): 100.
10. the warm mix heavy duty asphalt grouting material of claim 9, wherein the mass ratio of the natural rock asphalt to the matrix asphalt is 16:100.
11. the warm mix heavy duty asphalt grouting material according to claim 8, wherein aromatic hydrocarbon content in aromatic hydrocarbon oil is more than or equal to 85%, ash content is less than or equal to 0.05%, moisture content is less than or equal to 0.01%, solidifying point is less than 5 ℃, and flash point is more than or equal to 220 ℃.
12. The warm mix heavy duty asphalt grouting material of claim 8, wherein the particle size of the nano sulfur powder is less than or equal to 50nm.
13. The warm mix heavy duty asphalt grouting material of claim 1, wherein the warm mix heavy duty asphalt grouting material comprises the following components in parts by weight: 89 parts of heavy-duty asphalt, 1.0 part of surface active warm mix agent and 10 parts of floating beads;
or, the warm mix heavy duty asphalt grouting material comprises the following components in parts by weight: 79 parts of heavy asphalt, 1.0 part of surface active warm mix agent and 20 parts of floating beads.
14. A method for preparing a warm mix heavy duty asphalt grouting material according to any one of claims 1-13, wherein the components of the warm mix heavy duty asphalt grouting material are mixed.
15. The method for preparing the warm mix heavy duty asphalt grouting material according to claim 14, wherein the method for preparing the warm mix heavy duty asphalt grouting material comprises the following steps: heating the heavy-duty asphalt and the floating beads, then adding the surface active warm-mix agent, mixing, and fully stirring.
16. The method of preparing a warm mix heavy duty asphalt grouting material of claim 15, wherein said heating is performed in a mixing kettle.
17. The method for preparing a warm mix heavy duty asphalt grouting material according to claim 15, wherein the heating temperature is 160-180 ℃.
18. The method of making a warm mix heavy duty asphalt slip casting according to claim 17, wherein the heating temperature is 170 ℃.
19. The method for preparing a warm mix heavy duty asphalt grouting material according to claim 15, wherein the mixing time is 20-30 minutes.
20. The method of preparing a warm mix heavy duty asphalt grouting material of claim 14, wherein said heavy duty asphalt is prepared as follows:
(1) Adding SBS modifier into the preheated matrix asphalt to sequentially swell and shear;
(2) Adding a solubilizer and a stabilizer for shearing;
(3) Adding natural rock asphalt for fully mixing;
(4) And (3) carrying out static development on the mixture obtained in the step (3).
21. The method for preparing a warm mix heavy duty asphalt grouting material according to claim 20, wherein in the step (1), the preheating temperature is 130-150 ℃;
and/or, in the step (1), the swelling time is 10-20 minutes;
and/or in the step (1), the shearing rotating speed is 3000-5000 rpm;
and/or, in the step (1), the shearing time is 40-60 minutes;
and/or, in step (2), the rotational speed of the shearing is 5000 revolutions per minute;
and/or, in the step (2), the shearing time is 10-20 minutes;
and/or, in the step (3), the temperature of mixing is 160-180 ℃;
and/or, in the step (3), the mixing time is 20-30 minutes;
and/or the development temperature is 150-170 ℃;
and/or the development time is 6-10 hours.
22. The method of claim 21, wherein in step (1), the pre-heating temperature is 150 ℃;
and/or, in step (1), the swelling time is 10 minutes;
and/or, in step (1), the rotational speed of the shearing is 5000 revolutions per minute;
and/or, in step (1), the shearing time is 60 minutes;
and/or, in step (3), the temperature of the mixing is 180 ℃;
and/or, in step (3), the mixing time is 30 minutes;
and/or, the temperature of development is 160 ℃;
and/or, the time of development is 6 hours.
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| CN103333510B (en) * | 2013-06-20 | 2015-03-25 | 十堰福波新材料有限公司 | Light asphalt damping film for automobile and preparation method thereof |
| CN104312180B (en) * | 2014-11-18 | 2017-05-10 | 吉林市城投筑路材料股份有限公司 | Warm mix asphalt modifier and asphalt mixture |
| US20160376440A1 (en) * | 2015-06-26 | 2016-12-29 | Green Paving Solutions, Llc | Asphalt additive, asphalt compositions and products comprising such additive, asphalt surfaces comprising such additive, methods of making and using such additive, compositions, surfaces and products |
| CN107987541B (en) * | 2017-12-11 | 2020-04-24 | 山西省交通科学研究院 | Bio-based flame-retardant modified asphalt and preparation method thereof |
| CN108530922B (en) * | 2018-04-26 | 2021-07-09 | 上海公路桥梁（集团）有限公司 | Asphalt grouting material and preparation method thereof |
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