Disclosure of Invention
One of the technical problems to be solved by the invention is as follows: how to obtain a stable micro-surfacing pavement material with excellent anti-skid and wear-resistant performances.
The existing micro-surfacing pavement material has the defects of large fine aggregate proportion, small void ratio and small pavement construction depth, so that the noise absorption capacity is poor, the skid resistance is low, and the driving safety and the comfort are influenced.
In order to solve the technical problems, the invention provides a micro-surfacing pavement material and a preparation method thereof.
The invention provides a micro-surfacing pavement material, which comprises aggregate, emulsified asphalt and water, wherein the mass ratio of the aggregate to the emulsified asphalt to the water is 1: (0.06-0.08): (0.05-0.06); the aggregate comprises the following components in percentage by mass: 30-42% of steel slag coarse aggregate, 42-46% of steel slag fine aggregate, 5-12% of glass aggregate, 1-3% of rubber particle aggregate and 5-7% of filler.
Furthermore, the grain size of the steel slag coarse aggregate is 2.37-9.5 mm.
Further, the grain size of the steel slag fine aggregate is 0-2.36 mm.
Furthermore, the particle size of the glass aggregate is 2.36-4.75 mm.
Further, the particle size of the rubber particle aggregate is 0-2.36 mm.
Furthermore, the filler is limestone mineral powder and portland cement.
Furthermore, the particle size of the filler is 0-0.075 mm.
Further, the emulsified asphalt is SBR modified emulsified asphalt.
The invention also provides a preparation method of the micro-surfacing pavement material, which comprises the following steps: mixing the steel slag coarse aggregate, the steel slag fine aggregate, the glass aggregate, the rubber particle aggregate and the filler according to the mixture ratio of the components, adding the water-wet material system, and then adding the emulsified asphalt for mixing to prepare the micro-surfacing pavement material.
Compared with the prior art, the invention has the advantages that: according to the mass percentage, 30-42% of steel slag coarse aggregate, 42-46% of steel slag fine aggregate, 5-12% of glass aggregate, 1-3% of rubber particle aggregate, 5-7% of filler, 6-8% of emulsified asphalt and 5-6% of water are mixed, the steel slag coarse aggregate is hard and wear-resistant, and a high-wear-resistance and high-strength framework structure is provided for the material. The glass aggregate has rich edges and corners, improves the construction depth of the pavement material at the micro-surfacing and improves the skid resistance. The rubber particle aggregate has certain elasticity, can absorb the heavy impact force, further buffer the pressure of the automobile to the material, prevent the heavy objects such as the automobile from damaging the road surface, and combine other components, so that the micro-surfacing road surface material has excellent and stable anti-skidding wear-resisting property, and the BPN value is as high as 81.
Detailed Description
The specific embodiment provides a micro-surfacing pavement material, which comprises aggregate, emulsified asphalt and water, wherein the mass ratio of the aggregate to the emulsified asphalt to the water is 1: (0.06-0.08): (0.05-0.06); the aggregate comprises the following components in percentage by mass: 30-42% of steel slag coarse aggregate, 42-46% of steel slag fine aggregate, 5-12% of glass aggregate, 1-3% of rubber particle aggregate and 5-7% of filler. The steel slag coarse aggregate has the particle size of 2.37-9.5 mm, the steel slag fine aggregate has the particle size of 0-2.36mm, the glass aggregate has the particle size of 2.36-4.75mm, the rubber particle aggregate has the particle size of 0-2.36mm, and the filler has the particle size of 0-0.075 mm.
Furthermore, the filler is limestone mineral powder and portland cement; the emulsified asphalt is SBR modified emulsified asphalt; further, the portland cement is p.o42.5 portland cement.
The specific embodiment further comprises a preparation method of the micro-surfacing pavement material, which comprises the following steps: according to the proportion of the components, mixing the steel slag coarse aggregate, the steel slag fine aggregate, the glass aggregate, the rubber particle aggregate and the filler for 30-40 seconds until the mixture is uniform, adding water for mixing for 30-40 seconds until the mixture is wet, and then adding emulsified asphalt for mixing for 30-40 seconds until the mixture is uniform to obtain the micro-surfacing pavement material.
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Example 1
The micro-surfacing pavement material in the implementation comprises aggregate, SBR modified emulsified asphalt and water, wherein the mass ratio of the aggregate to the SBR modified emulsified asphalt to the water is 1: 0.07: 0.06; the aggregate comprises the following components in percentage by mass: 22% of steel slag aggregate with the grain diameter of 4.75-9.5mm, 10% and 13% of waste glass and steel slag aggregate with the grain diameter of 2.36-4.75mm, 46% and 3% of steel slag aggregate and rubber particles with the grain diameter of 0-2.36mm, 4.5% of mineral powder and 1.5% of portland cement.
The preparation method of the micro-surfacing pavement material in the embodiment comprises the following steps: according to the proportion of the components, mixing the steel slag coarse aggregate, the steel slag fine aggregate, the glass aggregate, the rubber particle aggregate and the filler for 30s until the mixture is uniform, adding water for mixing for 34s until the mixture is uniformly wet, and then adding the SBR modified emulsified asphalt for mixing for 30s until the mixture is uniform to obtain the micro-surfacing pavement material.
Example 2
The difference between the embodiment and the embodiment 1 is only the mass percentage of the aggregate, specifically, the aggregate is calculated by mass percentage, the steel slag aggregate with the particle size of 4.75-9.5mm is 22%, the waste glass and the steel slag aggregate with the particle size of 2.36-4.75mm are 8% and 15%, respectively, the steel slag aggregate and the rubber particle with the particle size of 0-2.36mm are 47% and 2%, the mineral powder is 4.5%, and the silicate cement is 1.5%.
Example 3
The difference between the embodiment and the embodiment 1 is only the mass percentage of the aggregate, specifically, the aggregate is calculated by mass percentage, the steel slag aggregate with the particle size of 4.75-9.5mm is 22%, the waste glass and the steel slag aggregate with the particle size of 2.36-4.75mm are respectively 6% and 17%, the steel slag aggregate with the particle size of 0-2.36mm and the waste rubber particles are respectively 48% and 1%, the mineral powder is 4.5%, and the silicate cement is 1.5%.
Example 4
The embodiment provides a micro-surfacing pavement material, which comprises aggregate, SBR modified emulsified asphalt and water, wherein the mass ratio of the aggregate to the SBR modified emulsified asphalt to the water is 1: 0.06: 0.05; the aggregate comprises the following components in percentage by mass: 22% of steel slag aggregate with the grain diameter of 4.75-9.5mm, 12% and 10% of waste glass and steel slag aggregate with the grain diameter of 2.36-4.75mm, 46% and 3% of steel slag aggregate and waste rubber particles with the grain diameter of 0-2.36mm, 4.5% of mineral powder and 1.5% of portland cement.
The preparation method of the micro-surfacing pavement material in the embodiment comprises the following steps: according to the proportion of the components, mixing steel slag coarse aggregate, steel slag fine aggregate, glass aggregate, rubber particle aggregate and filler for 40s until the mixture is uniform, adding water for mixing for 40s until the mixture is uniformly wet, and then adding SBR modified emulsified asphalt for mixing for 35s until the mixture is uniform to obtain the micro-surfacing pavement material.
Example 5
The embodiment provides a micro-surfacing pavement material, which comprises aggregate, SBR modified emulsified asphalt and water, wherein the mass ratio of the aggregate to the SBR modified emulsified asphalt to the water is 1: 0.08: 0.06; the aggregate comprises the following components in percentage by mass: 23% of steel slag aggregate with the grain diameter of 4.75-9.5mm, 5% and 19% of waste glass and steel slag aggregate with the grain diameter of 2.36-4.75mm, 46% and 2% of steel slag aggregate and waste rubber particles with the grain diameter of 0-2.36mm, 3.5% of mineral powder and 1.5% of portland cement.
The preparation method of the micro-surfacing pavement material in the embodiment comprises the following steps: according to the proportion of the components, mixing the steel slag coarse aggregate, the steel slag fine aggregate, the glass aggregate, the rubber particle aggregate and the filler for 30s until the mixture is uniform, adding water for mixing for 35s until the mixture is uniformly wet, then adding the SBR modified emulsified asphalt for mixing for 40s until the mixture is uniform, and obtaining the micro-surfacing pavement material.
Comparative example 1
The comparative example differs from example 1 only in that the aggregate of the comparative example does not contain waste glass, and specifically, the aggregate has a composition, in mass percent, of: 22 percent of steel slag aggregate with the grain diameter of 4.75-9.5mm, 23 percent of steel slag aggregate with the grain diameter of 2.36-4.75mm, 46 percent and 3 percent of steel slag aggregate with the grain diameter of 0-2.36mm and rubber particles respectively, 4.5 percent of mineral powder and 1.5 percent of portland cement.
Comparative example 2
This comparative example differs from example 1 only in that the aggregate of this comparative example does not contain rubber particles, and specifically, the aggregate has a composition, in weight percent: 22% of steel slag aggregate with the grain diameter of 4.75-9.5mm, 10% and 13% of waste glass and steel slag aggregate with the grain diameter of 2.36-4.75mm, 49% of steel slag aggregate with the grain diameter of 0-2.36mm, 4.5% of mineral powder and 1.5% of portland cement.
Comparative example 3
The comparative example differs from example 1 only in that the aggregate of the comparative example does not contain waste glass and rubber particles, and specifically, the aggregate has a composition, in terms of weight percent, of: 22 percent of steel slag aggregate with the grain diameter of 4.75-9.5mm, 23 percent of steel slag aggregate with the grain diameter of 2.36-4.75mm, 49 percent of steel slag aggregate with the grain diameter of 0-2.36mm, 4.5 percent of mineral powder and 1.5 percent of portland cement.
The grading type of the micro-surfacing pavement materials of the examples 1 to 3 is MS-3 median grading synthesis, the specific grading is shown in the table 1, and the figure 1 is a synthetic grading curve.
TABLE 1 MS-3 type micro-surfacing pavement material composition gradation
Mesh size
|
9.5
|
4.75
|
2.36
|
1.18
|
0.6
|
0.3
|
0.15
|
0.075
|
Mixing ratio
|
Upper limit of grading
|
100
|
90
|
70
|
50
|
34
|
25
|
18
|
15
|
|
Lower limit of grading
|
100
|
70
|
45
|
28
|
19
|
12
|
7
|
5
|
|
Median grading of
|
100.0
|
80.0
|
57.5
|
39.0
|
26.5
|
18.5
|
12.5
|
10.0
|
|
Aggregate of 4.75-9.5mm
|
99.8
|
1.5
|
0.6
|
0.4
|
0.4
|
0.3
|
0.2
|
0.1
|
22.0%
|
Aggregate of 2.37-4.75 mm
|
100.0
|
99.7
|
11.6
|
0.3
|
0.3
|
0.3
|
0.2
|
0.1
|
23.0%
|
Aggregate of 0-2.36mm
|
100
|
100
|
99.9
|
65.3
|
35.5
|
22.7
|
13.1
|
6.6
|
49.0%
|
Mineral powder |
|
100
|
100
|
100.0
|
100.0
|
100.0
|
99.9
|
99.7
|
85.7
|
4.5%
|
Cement |
|
100
|
100
|
100
|
100
|
100
|
100
|
98.1
|
88.3
|
1.5%
|
Composition grading
|
100.0
|
78.2
|
56.9
|
37.8
|
23.8
|
17.8
|
13.2
|
9.2
|
100.0% |
The micro-surfacing pavement materials of examples 1-5 were prepared according to the "micro-surfacing and slurry seal technical guidelines" specifications for skid-resistant and noise-reducing micro-surfacing pavement materials, and the results of the relevant performance tests are shown in table 2.
TABLE 2 results of Performance test of micro-surfacing pavement materials of examples 1-5 and comparative examples 1-3 and of MS-3 basalt micro-surfacing pavement materials
As can be seen from Table 2, the blending times of examples 1-5 are all greater than specification 120s, indicating that the micro-surfacing pavement material has good workability. Compared with the common basalt micro-surfacing pavement material, the 1h wet wheel abrasion, the rut deformation rate and other parameters are slightly reduced, but the 1h wet wheel abrasion, the rut deformation rate and other parameters meet the standard requirements of micro-surfacing and slurry sealing technical guidelines and meet the basic pavement performance. Examples 1-5 have higher BPN values than the basalt micro-surfacing pavement material, indicating that the skid resistance of the basalt micro-surfacing pavement material is superior to that of the basalt micro-surfacing pavement material in examples 1-5. The BPN value of the comparative example 2 is obviously higher than that of the comparative examples 1 and 3, which shows that the waste glass can obviously improve the anti-skid property of the material; the lower decibel value of the pavement materials at the micro-surface of the basalt in the examples 1 to 5 shows that the doping of the waste rubber particles in the examples 1 to 5 has obvious effect on absorbing noise and has better noise reduction function, while the higher decibel value of the comparative examples 1 to 3, particularly the highest decibel value of the comparative example 3, shows that the effect of absorbing noise of the materials is improved under the matching of the rubber particles, the glass and other components.
Based on the synergistic action principle of different materials, the steel slag coarse aggregate is hard and wear-resistant, and the steel slag is used as the coarse aggregate to provide a high-wear-resistance and high-strength skeleton structure. The waste rubber particles are used as fine aggregates, and have larger elastic potential energy compared with waste rubber powder, and have better effect on noise absorption. The waste glass is used as aggregate, and the abundant edge performance of the waste glass is utilized to improve the structural depth of the micro-surfacing material, so that the anti-skid performance is improved. Furthermore, there is no precedent in the current research of using waste glass as aggregate in micro-surfacing.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.