Heat-insulating bituminous mixture for roads and production method thereof
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A technology for asphalt mixture and road use, applied in the field of asphalt mixture, can solve the problems of reducing the service life of the road surface, accelerating the aging of asphalt, and decreasing the cohesiveness, etc., and achieves the effect of improving the service life and hindering the transmission.
Inactive Publication Date: 2010-09-01
CHANGAN UNIV
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According to statistics, the highest temperature in some areas of our country in summer is above 40°C. When asphalt mixture is used as the pavement surface l
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Embodiment 1
[0020] Raw material selection: based on the total volume of the mixture, limestone aggregates account for 37%; porous basalt aggregates with a particle size of 9.5mm account for 14%, porous basalt aggregates with a particle size of 4.75mm account for 19%, and fly ash drift beads with a particle size of 0.15mm Accounting for 5%, fly ash bleaching beads with a particle size of 0.075mm accounted for 8%, fly ash bleaching beads with a particle size of less than 0.075mm accounted for 4%, limestone powder: 3%, and SBS modified petroleum asphalt: 10%.
[0021] Limestone aggregate: Limestone aggregate produced in Jingyang, Shaanxi, with a density of 2.648g cm -3 , the adhesion to asphalt is grade 4, the crushing value is 8.0%, the particle size is 0.075mm~13.2mm, continuous gradation;
[0022] Porous basalt aggregate: Porous basalt aggregate produced in Sichuan, with a density of 2.576g cm -3 , the porosity is 2.2%, the adhesion level to asphalt is 4, the crushing value is 15.0%, the...
Embodiment 2～5
[0031] The heat-insulating asphalt mixtures of Examples 2-5 were produced according to the method described in Example 1, and the raw materials and their volume ratios are shown in Table 2.
[0032] Example No.
9.5mm porous basalt aggregate
4.75mm Porous Basalt Aggregate
0.15mm fly ash floating beads
0.075mm fly ash floating beads
limestone ore powder
Less than 0.075mm fly ash floating beads
SBS modified petroleum asphalt
limestone aggregate
Example 2
13
18
4
5
1
2
8
49
Example 3
14
19
5
7
2
6
9
38
Example 4
15
20
6
9
3
6
10
31
Example 5
16
21
7
9
4
6
10
27
[0033]
[0034] Test example:
[0035] The road heat-insulating asphalt mixture specimens formed in Examples 1 to 5 were erected on the platform and cooled a...
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Abstract
The invention discloses a heat-insulating bituminous mixture for roads, which comprises the following materials in percentage by volume: 26 and 49 percent of limestone aggregate, 31 to 37 percent of porous basalt aggregate, 11 to 23 percent of coal ash floating bead, 1 to 4 percent of limestone mineral powder and 8 to 10 percent of SBS modified oil asphalt. The production method comprises the steps of: drying the limestone aggregate, the porous basalt aggregate, the coal ash floating bead with 0.15 and 0.075 millimeter, the limestone mineral powder, and the coal ash floating bead of less than 0.075 millimeter at 185 DEG C for 24 hours; mixing the limestone mineral powder and the coal ash floating bead of less than 0.075 millimeter in a proportion, and mixing the mixture and the SBS modified oil asphalt at 170 DEG C for uniform stirring; and adding the limestone aggregate, the porous basalt aggregate and the coal ash floating bead with 0.15 and 0.075 millimeter into the mixture for uniform stirring. The heat-insulating bituminous mixture has the heat-insulating function, and can prevent heat from transferring in structures of bituminous pavements and improve the service life of the pavements.
Description
technical field [0001] The invention relates to an asphalt mixture used for road paving, in particular to a road asphalt mixture with heat insulation function and a production method thereof. Background technique [0002] Asphalt mixture is a material that is very sensitive to temperature. Changes in the external environment cause unstable heat flow in the pavement structure, which constitutes the temperature field of the pavement structure. Due to the difference in temperature-sensing properties of layered pavement materials, the mutual constraints between the various structural layers, and the constraints along the route direction of the long and narrow pavement body, temperature stress is generated in the pavement body. For asphalt mixture, the change of temperature will lead to a big difference in its performance, and the damage mode in different temperature ranges is very different: in the low temperature range, the damage of asphalt pavement is mainly due to the rapid ...
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