Sealant for pavement cracks

A technology for pavement cracks and sealants, which is applied to roads, roads, pavement details, etc., can solve the problems that the performance of modified asphalt cannot be fully reflected, and achieve the effects of improving anti-aging performance, good anti-fatigue cracking performance, and improving low-temperature performance

Inactive Publication Date: 2013-01-16
赵金叶
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when characterizing the modified asphalt system, it is generally believed that conventional methods such as penetration and softening point cannot fully reflect the performance of the modified asphalt

Method used

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  • Sealant for pavement cracks
  • Sealant for pavement cracks
  • Sealant for pavement cracks

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] 1 experiment

[0016] 1.1 Raw material

[0017] SBS, a public product of Beijing Yanshan Petrochemical Co., Ltd., the brand is 4303, star-shaped, the relative molecular mass is about 350,000, and the mass fraction of styrene block is 30%. Asphalt, heavy traffic asphalt AH-90, product of Lanzhou Oil Refinery General Plant, penetration 90 (0.1mm), softening point 45°C, ductility greater than 150cm. Organic bentonite, 325 mesh, product of Tianjin Hualian Organic Chemical Factory. Silane coupling agent, product of Nanjing Shuguang Chemical Factory.

[0018] 1.2 Sample preparation

[0019] After heating the asphalt to 170°C, add a certain amount of SBS, and shear it for 0.5-1h under the conditions of 170-190°C and 3000-5000r / min to obtain a sample without adding organic bentonite. Add organic bentonite and coupling agent to this sample, continue to shear 0.5-1.sh under the original conditions, and then get a modified asphalt sample with organic bentonite and coupling age...

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Abstract

The invention discloses a sealant for pavement cracks, characterized by compounding organo-bentonite with SBS modified asphalt to prepare the sealant. Results of studying the impact of the modifier and its amount on the high temperature performance and low temperature performance of the modified asphalt show that by adding organo-bentonite and the SBS composition, the high temperature composite modulus of the asphalt is raised, the temperature sensitivity is significantly weakened, thus the high temperature performance of the asphalt is improved; simultaneously the creep stiffness of the modified asphalt after aging is reduced, the creep rate is increased, the low temperature performance of the asphalt after aging is raised, and in the long-term use process, good fatigue cracking resistance is achieved.

Description

Technical field [0001] The invention is a pavement maintenance material, especially used for joint filling material of asphalt pavement and the like, and is an advanced technology in pavement maintenance materials. technical background [0002] With the development of road transportation, the construction of high-grade roads has attracted more and more attention from various countries. Because of its good high-temperature stability and low-temperature ductility, modified asphalt has a significant effect on improving the quality of the road surface and prolonging the road use period. Therefore, it has been rapidly promoted and applied. At present, when characterizing the modified asphalt system, it is generally believed that conventional methods such as penetration and softening point cannot fully reflect the performance of the modified asphalt. Relatively speaking, because the dynamic properties of asphalt are closer to the viscoelastic behavior of materials under service c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K9/04C08K3/34E01C11/02
Inventor 赵金叶何广胜
Owner 赵金叶
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