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Waterproof modified asphalt for dam asphalt well and preparation method thereof

A technology of modified asphalt and asphalt well, which is applied in building components, building insulation materials, buildings, etc. It can solve the problems of high softening point of modified asphalt, complex asphalt preparation process, and low durability of asphalt, and achieve good low temperature crack resistance performance and high temperature performance, the preparation method is simple and fast, and the effect of good flowability

Inactive Publication Date: 2013-11-20
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But because it contains coal tar, it causes certain pollution, which limits its development
[0005] Butyl rubber modified asphalt sealant ointment uses styrene-butadiene rubber as a modifier. Styrene-butadiene rubber can significantly improve the low-temperature crack resistance of asphalt mixture, but its fluidity at 80-90 °C cannot meet the requirements of construction projects. the actual needs of
[0006] SBS modified asphalt materials have been recognized by the market due to their excellent modification effects. In modified asphalt physical projects, SBS modified asphalt gradually occupies an absolute dominant share, but the softening point of SBS modified asphalt on the market is relatively high. Also at a temperature of 80-90 °C, the fluidity cannot meet the actual application on the construction site
[0007] Chinese patent application CN201210286824.0 proposes a "CNT-SBS modified asphalt", although this technical solution has the advantages of compression resistance, high crack resistance, good plasticity and low temperature sensitivity, it still has the following deficiencies, one is The construction temperature of this asphalt is relatively high, which cannot meet the actual construction requirements of dam asphalt wells; second, the preparation process of this asphalt is relatively complicated, and the factory needs to be equipped with professional equipment for processing and production
[0008] Chinese patent application CN200410061490.2 proposes a kind of "environmentally friendly modified asphalt". Although this technical solution has the advantages of being able to effectively utilize waste and be beneficial to environmental protection, it still has the following disadvantages. One is that rubber is added to the asphalt, resulting in The final modified asphalt has a high softening point; second, the durability of the asphalt is not high and the service life is short

Method used

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  • Waterproof modified asphalt for dam asphalt well and preparation method thereof
  • Waterproof modified asphalt for dam asphalt well and preparation method thereof

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Embodiment 1

[0031] A waterproof modified asphalt for dam asphalt wells proposed by the present invention is prepared according to the required weight. The raw materials include (by mass percentage): 55% matrix asphalt, 40% environmentally friendly aromatic oil, 4.2% linear SBS modifier powder and 0.8% antioxidant, the specific implementation steps are as follows:

[0032] Step 1, blending: first heat the base asphalt with a mass percentage of 55% to a molten state at 120°C, then add an environmentally friendly aromatic oil with a mass percentage of 40%, and stir it with a mixer to make it fully mixed; wherein, the base asphalt is AH-70 asphalt; environmentally friendly aromatic oil is special oil for GXJ-I rubber;

[0033] Step 2, modification: after heating the mixture obtained in step 1 to 150°C, add 4.2% by mass of linear SBS modifier powder and 0.8% by mass of antioxidant to form asphalt colloid; among them, linear SBS The modifier is YH-792, and the particle size of its powder is 10...

Embodiment 2

[0039] A waterproof modified asphalt for dam asphalt wells proposed by the present invention is prepared according to the required weight. The raw materials include (by mass percentage): 70% base asphalt, 28% environmentally friendly aromatic oil, 1% linear SBS modifier powder mixed with 1% antioxidant. The specific implementation steps are as follows:

[0040] Step 1, blending: first heat the base asphalt with a mass percentage of 70% to a molten state at 145°C, then add an environmentally friendly aromatic oil with a mass percentage of 28%, and stir it with a mixer to make it fully mixed; wherein, the base asphalt is AH-100 asphalt; environmentally friendly aromatic oil is GXJ-Ⅰ special oil for rubber;

[0041] Step 2, modification: after heating the mixture obtained in step 1 to 180°C, add 1% by mass linear SBS modifier powder and 1% by mass antioxidant to form asphalt colloid; among them, linear SBS The modifier is YH-791, and the particle size of its powder is 100-200 mes...

Embodiment 3

[0047] A waterproof modified asphalt for dam asphalt wells proposed by the present invention is prepared according to the required weight. The raw materials include (by mass percentage): 63% matrix asphalt, 34% environmentally friendly aromatic oil, 2.1% linear SBS modifier powder mixed with 0.9% antioxidant. The specific implementation steps are as follows:

[0048] Step 1, blending: first heat the base asphalt with a mass percentage of 63% to a molten state at 135°C, then add an environmentally friendly aromatic oil with a mass percentage of 34%, and stir it with a mixer to make it fully mixed; wherein, the base asphalt is AH-70 asphalt; environmentally friendly aromatic oil is special oil for GXJ-I rubber;

[0049] Step 2, modification: After heating the mixture obtained in Step 1 to 170°C, add linear SBS modifier powder with a mass percentage of 2.1% and an antioxidant with a mass percentage of 0.9% to form an asphalt colloid, wherein, The linear SBS modifier is YH-796, ...

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Abstract

The invention relates to waterproof modified asphalt for a dam asphalt well, which is characterized by comprising the following components in percentage by mass: 55-70% of matrix asphalt, 28-40% of environment-friendly aromatic oil, 1-4.2% of linear SBS (styrene-butadiene-styrene) modifier powder and 0.8-1% of antioxidant, wherein the matrix asphalt is AH-70 asphalt or AH-100 asphalt; the environment-friendly aromatic oil is special oil GXJ-I for rubber; the linear SBS modifier powder is YH-792 or YH-791 or YH-796; and the antioxidant is KY-405 or TBY-2246. The waterproof modified asphalt provided by the invention is prepared through five steps of blending, modification, primary development shearing, secondary development shearing and cooling. The waterproof modified asphalt provided by the invention has the advantages of low-temperature fluidity and low-temperature crack resistance at 80-90 DEG C. The preparation method provided by the invention is simple and convenient, and is suitable for direct processing and production on a construction site.

Description

technical field [0001] The invention relates to an engineering asphalt material, in particular to a waterproof modified asphalt used in dam asphalt wells and a preparation method thereof. Background technique [0002] The known waterproof modified asphalt varieties mainly include butyl rubber modified asphalt sealant, SBS modified asphalt sealant, recycled rubber modified asphalt ointment, plastic ointment and polyvinyl chloride cement. Waterproof modified asphalt is a paste-like sealing material made of asphalt as the base material, modified with an appropriate amount of synthetic polymer, added with fillers and colorants, and processed through a specific preparation method. Waterproof modified asphalt is mainly used for waterproofing and anti-seepage of joints, holes, nozzles and other parts of buildings, as well as waterproofing layer closure treatment. The existing dam asphalt well uses dam waterproof asphalt as the sealing material. Generally, after more than 10 years...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K5/01
Inventor 周继凯秦磊赵新华马晓辉陈连芳程大鹏查益华陈徐东张兵王程江
Owner HOHAI UNIV
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