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Modified asphalt having rutting resistance under extreme high temperature and heavy load conditions, and preparation method of modified asphalt
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A modified asphalt and anti-rutting technology, which is applied to building components, building insulation materials, buildings, etc., can solve the problems of asphalt anti-rutting and achieve the effects of improving anti-rutting ability, large deformation ability, and reducing maintenance
Inactive Publication Date: 2017-08-08
云南阳光道桥股份有限公司
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Problems solved by technology
Since there is currently no asphalt modification method that can make the softening point of the modified asphalt reach above 90°C, solving the problem of asphalt anti-rutting under high temperature and heavy load is th
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Embodiment 1
[0039] Specific steps for preparing anti-rutting modified asphalt under extreme high temperature and heavy load conditions: the following materials are used in weight percentages:
[0040] A: Base asphalt 95.43%;
[0041] B: SBS and SBR mixture 4.2%;
[0042] C: Composite cross-linking agent 0.3%;
[0043] D: Composite stabilizer 0.07%.
[0044] The composite cross-linking agent is composed of organic minerals and vulcanized cross-linking agents, organic minerals: vulcanized cross-linking agent=1:0.6.
[0045] The composite stabilizer is composed of petroleum resin and anti-aging agent, petroleum resin:anti-aging agent=1:0.4.
[0046] The composition ratio of the SBS and SBR mixture is SBS:SBR=1:02.
[0047] Use the above materials as follows:
[0048] (1) The base asphalt is heated to 170°C;
[0049] (2) The heated base asphalt and materials B and C are added in proportion to the production batching tank for stirring and mixing to obtain a preliminary mixture;
[0050]...
Embodiment 2
[0062] Specific steps for preparing anti-rutting modified asphalt under extreme high temperature and heavy load conditions: the following materials are used in weight percentages:
[0063] A: Base asphalt 94.4%;
[0064] B: SBS and SBR mixture 5%;
[0065] C: Composite crosslinking agent 0.5%;
[0066] D: Composite stabilizer 0.1%.
[0067] The composite cross-linking agent is composed of organic minerals and vulcanized cross-linking agents, organic minerals: vulcanized cross-linking agent=1:1.2.
[0068] The composite stabilizer is composed of petroleum resin and anti-aging agent, petroleum resin: anti-aging agent=1: 0.6.
[0069] The composition ratio of the SBS and SBR mixture is SBS:SBR=1:0.4.
[0070] Use the above materials as follows:
[0071] (1) The base asphalt is heated to 180°C;
[0072] (2) The heated base asphalt and materials B and C are added in proportion to the production batching tank for stirring and mixing to obtain a preliminary mixture;
[0073] (...
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Abstract
The invention discloses modified asphalt having rutting resistance under extreme high temperature and heavy load conditions, and a preparation method of the modified asphalt, aiming at providing modified asphalt with good performance, and a preparation method of the modified asphalt. The modified asphalt is prepared from the following materials by weight percent: a material A: 94.4-95.43% of matrix asphalt, a material B: 4.2-5% of a mixed material of a styrene-butadiene-styrene block polymer (SBS) and styrene butadiene rubber (SBR), a material C: 0.3-0.5% of a compound crosslinking agent, and a material D: 0.07-0.1% of a compound stabilizer. An asphalt pavement paved by using the modified asphalt can prevent early damage, thus reducing maintenance, prolonging the service life of a road and effectively lowering operating cost; therefore, overall construction, operation and maintenance costs are greatly reduced.
Description
technical field [0001] The invention relates to the technical field of road traffic construction, in particular to a rutting-resistant modified asphalt under extremely high-temperature and heavy-load conditions and a preparation method thereof. Background technique [0002] The restoration project of the southern section of the Pakistan N5 highway built by China is located in the southeastern part of Pakistan. It is a two-way four-lane asphalt road for mixed traffic. Pakistan's traffic management is relatively open, with no load and weight restrictions, and jogging in Dora is more common. The southern part of Pakistan is tropical and has obvious monsoon climate characteristics. The minimum temperature is around 5°C and the maximum temperature is around 55°C. The high temperature lasts for a long time and the daily temperature difference is small. At 100mm-200mm, the rainy season is short and the rainfall is small. The local asphalt pavement is paved with ordinary matrix as...
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