Asphalt reducing agent, cold-mixed pavement overlay material and overlay paving method
A reducing agent and overlay technology, applied in roads, buildings, roads, etc., can solve the problems of unremarkable improvement of the technical condition of the original road surface, difficult to continue to use leftover materials, and failure to meet the requirements, so as to solve the problem of rutting and resist Abrasion effect, strong bonding effect
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Embodiment 1
[0027] Preparation of asphalt reducing agent:
[0028] Diboron trioxide, polythiophene and potassium fluoroborate were uniformly mixed according to the material mass ratio shown in Table 2 to obtain the asphalt reducing agent sample.
[0029] Table 2. Reductant material ratio
[0030] sample 1 sample 2 sample 3 Sample 4 Sample 5 Sample 6 Sample 7 Diboron trioxide 0.45 0.45 0.45 0.45 0.45 0.45 0.45 Polythiophene 0 0.1 0.2 0.25 0.3 0.35 0.55 Potassium fluoroborate 0.55 0.45 0.35 0.3 0.25 0.2 0
[0031] Reductant performance test:
[0032] The modified asphalt was subjected to a rotating film oven aging test. The low-temperature performance of the aged asphalt was evaluated by the ductility, the high-temperature performance of the aged asphalt was evaluated by the softening point, and the temperature-sensing performance of the aged asphalt was evaluated by the penetration. Add sample 1-sample 7 to the modified emuls...
Embodiment 2
[0037] The overlay material was prepared with aggregate, emulsified modified asphalt and reducing agent with a mass ratio of 78:14:8.
[0038] The reducing agent adopts the raw material ratio of Example 1 sample 4, and the mass ratio of diboron trioxide, polythiophene and potassium fluoroborate is 0.45:0.25:0.3.
[0039] The aggregate gradation is shown in Table 4.
[0040] Table 4 Aggregate Grading Composition
[0041]
[0042] Preparation and paving steps:
[0043] S1. Add the SBS modifier to the emulsified asphalt, and then use a high-speed shearer to produce modified emulsified asphalt. The speed of the high-speed shearer is 3700 rpm, and the shearing time is 12min. The addition amount of SBS modifier in emulsified modified asphalt is 4%, 10%, 12%, 14%, 16%.
[0044] S2. Add the reducing agent into the modified emulsified asphalt, using a high-speed shearing instrument with a rotation speed of 4300 rpm and a shearing time of 24 minutes.
[0045] S3. After cutting, a...
Embodiment 3
[0047] The overlay material was prepared with aggregate, emulsified modified asphalt and reducing agent with a mass ratio of 82:12:6.
[0048] Reductant, aggregate composition and preparation and paving steps are the same as in Example 2.
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