Ultraviolet-rejected solid asphalt, preparation and application thereof

A UV barrier and asphalt technology, applied in building components, building insulation materials, buildings, etc., can solve the problems of unstable asphalt performance, long time-consuming, complicated construction, etc., achieve convenient operation, simple on-site process, and reduce construction time and energy consumption effect

Active Publication Date: 2014-06-25
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the preliminary research on magnesium-aluminum-based layered double hydroxide modified asphalt, researchers found that ther

Method used

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  • Ultraviolet-rejected solid asphalt, preparation and application thereof
  • Ultraviolet-rejected solid asphalt, preparation and application thereof
  • Ultraviolet-rejected solid asphalt, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] In parts by mass, 50 parts of SK70 # The base asphalt and 10 parts of co-solvent (the co-solvent is mixed by 80 parts of polyethylene resin and 20 parts of ethylene vinyl acetate copolymer) are sheared and stirred at 6000 rpm at 180 ° C for 1 hour, and then Add 40 parts of LT-1 type magnesium-aluminum-based double hydroxide (abbreviated as Ruifa LT-1) produced by Ruifa Chemical Co., Ltd. in several times at 160 ° C, stir evenly for 1 hour, and then reduce to room temperature for grinding to make the mixture. Solid particles into UV-blocking solid bitumen.

[0029] Add the solid particles of UV-blocking solid asphalt to SK90 at 150℃ # In road asphalt, UV blocking modified SK90 was obtained after stirring for 0.5h # road asphalt. The obtained modified road asphalt was subjected to ultraviolet aging test (ultraviolet intensity was 1200 μw / cm 2 , aging for 6 days, the same below), the following test is based on the "Highway Engineering Asphalt and As...

Example Embodiment

[0034] Example 2:

[0035] In parts by mass, 65 parts of SK70 # Base asphalt and 2 parts of co-solvent (mixed by mass parts from 40 parts of polyethylene resin, 20 parts of styrene-butadiene rubber, 20 parts of styrene-butadiene-styrene block copolymer (SBS) and 20 parts of zinc oxide At 160 °C, shear and stir at 3000 rpm for 1 hour, then add 35 parts of Ruifa LT-1 at 140 °C for several times, stir evenly for 2 hours, and then reduce to room temperature for grinding to make a UV-blocking solid state. Solid particles of asphalt.

[0036]Add the solid particles of UV-blocking solid asphalt to SK90 at 145℃ # In road asphalt, UV blocking modified SK90 was obtained # road asphalt. The obtained modified road asphalt was subjected to ultraviolet aging test (ultraviolet intensity was 1200 μw / cm 2 , aging for 6 days, the same below), the test data is shown in Table 2:

[0037] Table 2

[0038]

[0039] Compared with the blank group, the viscosity increase, softening point inc...

Example Embodiment

[0041] Example 3:

[0042] In parts by mass, 54 parts of PG70-28SBS modified asphalt and 1 part of cosolvent (in parts by mass composed of 50 parts of carboxylated nitrile rubber, 25 parts of epoxy natural rubber and 20 parts of styrene-butadiene-styrene Block copolymer (SBS) and 5 parts of magnesium oxide were mixed) at 170 ° C, shearing and stirring at a speed of 5000 rpm for 2 hours, and then 45 parts of Refa LT-1 were added at 165 ° C in several times. , uniformly stirred for 1 hour and then reduced to room temperature for grinding to make solid particles of UV-blocking solid asphalt.

[0043] Add the solid particles of UV-blocking solid asphalt to SK90 at 145℃ # In road asphalt, UV blocking modified SK90 was obtained after stirring for 1h # road asphalt. The obtained modified road asphalt was subjected to ultraviolet aging test (ultraviolet intensity was 1200 μw / cm 2 , aging for 6 days, the same below), the test data are shown in Table 3:

[0044] table 3

[0045] ...

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Abstract

The invention discloses ultraviolet-rejected solid asphalt, preparation and application thereof. The ultraviolet-rejected solid asphalt is prepared by mixing asphalt, magnesium-aluminum-based layered double hydroxide and a cosolvent and is solid-particle-shaped. The ultraviolet-rejected solid asphalt comprises the following components in percentage by weight: 50%-65% of asphalt, 30%-45% of magnesium-aluminum-based layered double hydroxide and 1%-10% of cosolvent. The ultraviolet-rejected solid asphalt is solid-particle-shaped (or powder-shaped) under the normal temperature, and compared with common asphalt which needs insulation for storage and needs to be loaded and unloaded in time in the process of production and use, the solid-particle-shaped (or powder-shaped) asphalt is stable in property and is more convenient in transportation and storage; simultaneously, the ultraviolet rejection action is excellent, the ageing resistance of the road asphalt is obviously improved, the use performances of rutting resistance and water stability of asphalt mixture can be effectively improved and the service life of asphalt roads can be prolonged.

Description

technical field [0001] The invention relates to an ultraviolet blocking solid asphalt and its preparation and application. Background technique [0002] Asphalt pavement has become the most widely used high-grade pavement in road construction because of its excellent road performance. However, during the production and use of asphalt, it generally needs to be stored in storage tanks with heat preservation, and it also needs to be unloaded in time after being transported to the destination, which has high requirements for production arrangements. At the same time, asphalt is also an organic mixture, which is easily affected by high temperature and ultraviolet radiation. It will become hard and brittle due to thermal oxygen and photo-oxygen aging, resulting in cracks, ruts, pits, peeling and other diseases on the asphalt pavement. It damages the performance of asphalt pavement and shortens its service life. [0003] Since asphalt is composed of thousands of organic compounds...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K3/22E01C7/26
Inventor 吴少鹏孙艺涵肖月刘全涛唐宁陈宗武曾文博
Owner WUHAN UNIV OF TECH
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