Casting type mixture asphalt material and preparation method thereof
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A technology of asphalt materials and mixtures, applied in building insulation materials, building components, buildings, etc., can solve problems such as pouring asphalt concrete, and achieve a wide range of applications
Inactive Publication Date: 2014-12-17
PETROCHINA CO LTD +2
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[0003] The performance of cast asphalt concrete mainly depends on the properties of the modified asphalt used. The properties of traditional asphalt obtained directly from oil refineries c
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Embodiment 1
[0023] (1) Composed of the following components in parts by mass:
[0024] Base bitumen 85.5 parts
[0025] Modifier 9 parts
[0026] 4 parts filling oil
[0027] Accelerator 0.15 parts
[0028] (2) Add the modifier to the base asphalt at 140°C, high-shear at 170-180°C for 60 minutes at a speed of 2500 rpm, take samples to observe sufficient swelling, add filler oil and shear at the same speed for 15 minutes.
[0029] (3) Add the accelerator to the sample at 170-180 ° C and then high-shear for 90 minutes, and the rotation speed is 3500 rpm.
[0030] Table 1 Example 1 Performance of high-performance high-viscosity modified asphalt
[0031]
Embodiment 2
[0033] Consists of the following components in parts by mass:
[0034] Base bitumen 78.75 parts
[0035] Modifier 14 parts
[0036] Filling oil 7 parts
[0037] Accelerator 0.25 parts
[0038] (2) Add the modifier to the base asphalt at 140°C, high-shear at 170-180°C for 60 minutes at a speed of 3500 rpm, take samples to observe sufficient swelling, add filler oil and shear at the same speed for 25 minutes.
[0039] (3) Add the accelerator to the sample at 170-180 °C and then high-shear for 90 minutes, and the rotation speed is 4500 rpm.
[0040] The performance of the high-performance high-viscosity modified asphalt of table 2 embodiment two
[0041]
[0042] From the results of Example 1 and Example 2, it can be seen that the developed high-performance high-viscosity modified asphalt not only has a higher softening point and hardness, but also has excellent elastic recovery and thermal aging properties. At the same time, the thermal storage stability is also very goo...
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Abstract
The invention relates to a casting type mixture asphalt material and a preparation method thereof. The casting type mixture asphalt material is composed of, by weight, 70-92 parts of matrix asphalt, 7-14 parts of an asphalt SBS modifier, 0.5-10 parts of filling oil, and 0.05-0.3 part of an accelerant. The preparation method includes: adding the modifier into 140-190DEG C matrix asphalt, performing high shear for 20-90min under 1000-5000rpm, after full swelling of the modifier, adding the filling oil, and conducting shearing for 5-30min under 1000-5000rpm, adding the accelerant into a reaction kettle, and further carrying out high shear for 90min under 1000-5000rpm. The modified asphalt has good adhesion, high elastic recovery and low temperature elongation, low high-temperature construction viscosity, good stability under hot storage conditions, no segregation, and good pavement performance under high temperature state.
Description
technical field [0001] The invention relates to a castable mixture asphalt material and a preparation method thereof. Background technique [0002] Pourable asphalt concrete is a special asphalt mixture with high asphalt content and high mineral powder content that is mixed at high temperature (about 220 ° C ~ 260 ° C), paved and shaped by its own fluidity, and does not need to be rolled. This material basically has no voids, is impermeable, has good corrosion resistance, and has strong freeze-thaw cycle resistance. It is the most durable asphalt mixture; it has excellent wear resistance; strong deformation ability, and is not easy to crack at low temperature; no need for construction. Rolling, construction can be carried out in low temperature environment. Therefore, this material is widely used in highway pavement, long-span bridge deck pavement, tunnel pavement and other fields. [0003] The performance of cast asphalt concrete mainly depends on the properties of the mo...
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