Rubber powder modified asphalt for pavement patching and preparation method thereof

A modified asphalt and pavement repair technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of limited comprehensive improvement effect and poor reactivity, and achieve good anti-aging performance, excellent oxidation resistance and heat resistance. , the effect of good road performance

Active Publication Date: 2021-12-17
广州高速运营管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reactivity between SBS and rubber is poor, and the comprehensive improvement effect is limited

Method used

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  • Rubber powder modified asphalt for pavement patching and preparation method thereof
  • Rubber powder modified asphalt for pavement patching and preparation method thereof
  • Rubber powder modified asphalt for pavement patching and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0033] Examples 1 to 3 are a kind of rubber powder-modified asphalt for road surface repair with different rubber powder additions, including the formula composition shown in Table 1 below. The preparation method of described rubber powder modified asphalt is as follows:

[0034] Heat the asphalt to 250°C, then add rubber powder and stir for 6 hours to mix evenly, then cool down to 190°C, add thermoplastic elastomer and tackifying resin, stir and mix evenly, finally add HIPS and PPB and stir for 30 minutes to obtain the glue for road repair powder modified asphalt. The stirring rate in the whole process of the preparation method is controlled to be 1000-1500 r / min.

[0035] The performance test results of the original asphalt and residues after RTFOT are shown in Table 1 below.

[0036] Table 1

[0037]

[0038]From the test results in Table 1, it can be seen that with the gradual increase in the weight of rubber powder, the softening point of the modified asphalt increa...

Embodiment 4～6

[0040] Examples 4 to 6 are a kind of rubber powder-modified asphalt for road surface repair under the condition of different SBS additions, including the formula composition shown in Table 2 below. The preparation method of described rubber powder modified asphalt is as follows:

[0041] Heat the asphalt to 250°C, then add rubber powder and stir for 6 hours to mix evenly, then cool down to 190°C, add thermoplastic elastomer and tackifying resin, stir and mix evenly, finally add HIPS and PPB and stir for 30 minutes to obtain the glue for road repair powder modified asphalt. The stirring rate in the whole process of the preparation method is controlled to be 1000-1500 r / min.

[0042] The performance test results of the original asphalt and residues after RTFOT are shown in Table 2 below.

[0043] Table 2

[0044]

[0045] From the test results in Table 2, it can be seen that as the weight fraction of SBS increases from 2.5 to 3.5, the softening point of asphalt increases f...

Embodiment 7～9

[0047] Examples 7-9 are rubber powder-modified asphalt for road surface repair under the condition of different addition amount of stabilizer HIPS, including the formula composition shown in Table 3 below. The preparation method of described rubber powder modified asphalt is as follows:

[0048] Heat the asphalt to 250°C, then add rubber powder and stir for 6 hours to mix evenly, then cool down to 190°C, add thermoplastic elastomer and tackifying resin, stir and mix evenly, finally add HIPS and PPB and stir for 30 minutes to obtain the glue for road repair powder modified asphalt. The stirring rate in the whole process of the preparation method is controlled to be 1000-1500 r / min.

[0049] The performance test results of the original asphalt and residues after RTFOT are shown in Table 3 below.

[0050] table 3

[0051]

[0052] From the test results in Table 3, it can be seen that the group without stabilizer HIPS had obvious segregation, and the difference between the u...

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Abstract

The invention belongs to the technical field of road engineering materials, and discloses rubber powder modified asphalt for pavement patching and a preparation method of the rubber powder modified asphalt. The rubber powder modified asphalt comprises the following components in parts by weight: 100 parts of asphalt; 30 to 40 parts of rubber powder; 2 to 3.5 parts of thermoplastic elastomer; 0.1 to 0.5 part of HIPS (High Induced Polystyrene); 1 to 3 parts of PPB; and 2 to 5 parts of tackifying resin. The preparation method comprises the following steps: heating the asphalt to 240-260 DEG C, then adding the rubber powder, uniformly conducting stirring and mixing, then conducting cooling to 180-200 DEG C, adding the thermoplastic elastomer and the tackifying resin, uniformly conducting stirring and mixing, and finally adding the HIPS and the PPB, and conducting stirring and reacting to obtain the rubber powder modified asphalt for pavement patching. The rubber powder modified asphalt has the advantages of good stability, good high and low temperature performance, high strength and aging resistance, can be used for pavement patching, and prolongs the service life of a pavement.

Description

technical field [0001] The invention belongs to the technical field of road engineering materials, and in particular relates to a rubber powder modified asphalt for road surface repair and a preparation method thereof. Background technique [0002] The design service life of asphalt concrete pavement in my country is 15 to 20 years, but the actual service life is 8 to 12 years due to problems such as pavement damage. The actual service life is obviously shorter than the design standard life, and according to actual experience, The investment in asphalt pavement is less than half of the total cost of the road, and most of the maintenance funds are used in the repair of the ground. It can be seen that the damage of pavement is huge. [0003] The asphalt material itself has the huge disadvantage of poor high and low temperature resistance. Therefore, it is prone to cracks (transverse cracks, longitudinal cracks and reticular cracks) and rutting on asphalt roads after long-term e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L19/00C08L51/04C08L53/00C08L53/02C08L81/06
CPCC08L95/00C08L2201/08C08L2207/04C08L19/003C08L51/04C08L53/00C08L53/02C08L81/06
Inventor 何军王嘉琪邹鹏何杰忠何创
Owner 广州高速运营管理有限公司
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