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Casting type mixture asphalt material and preparation method thereof

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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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 cannot meet the needs of cast asphalt concrete, so asphalt must be properly modified. There are many types of permanent asphalt, but there is no special asphalt for castable asphalt mixture

Method used

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  • Casting type mixture asphalt material and preparation method thereof
  • Casting type mixture asphalt material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

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...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L9/06C08L23/00C08K5/01C08K3/06C08K5/36C08K5/14C08K3/22
Inventor 李剑新蒋福山时敬涛李玉环梁志中
Owner PETROCHINA CO LTD
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