Special modified asphalt for cast asphalt concrete, and preparation method thereof

A technology of asphalt concrete and modified asphalt, which is applied in the directions of buildings, building components, building structures, etc., can solve the problems of difficult to solve storage stability, difficult to solve segregation problems, and polymer accumulation and crusting, etc., to ensure high-temperature storage. Stability, improve storage stability, improve the effect of low temperature ductility

CN110499034AInactive Publication Date: 2019-11-26上海同沥新材料科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-11-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a special modified asphalt for cast asphalt concrete, and a preparation method thereof. The special modified asphalt comprises 100 parts of asphalt, 2-15 parts of an SBS (styrene-butadiene-styrene) block copolymer, 2-15 parts of hard asphalt and 1-10 parts of a toughening agent. The special modified asphalt for cast asphalt concrete can reach or exceed the softening point ofcommon cast asphalt, so the special modified asphalt has a good high-temperature stability; the special modified asphalt has a better low-temperature anti-cracking performance than common cast modified asphalt; and the special preparation method is adopted, so the modified asphalt of the invention has a very high storage stability, and is not prone to separate and crust at a high temperature.
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Description

technical field

[0001] The invention relates to the field of road building materials, in particular to a special modified asphalt for pouring asphalt concrete and a preparation method thereof. Background technique

[0002] Due to its good integrity, good water sealing effect, and good follow-up with the bridge deck, pouring asphalt binder has become one of the mainstream bridge deck pavement methods, such as the bridge deck pavement of the Hong Kong-Zhuhai-Macao Bridge in my country Poured asphalt binders are used.

[0003] At present, the asphalt binders in poured asphalt concrete used in steel bridge deck pavement in my country mainly include the following schemes: low-grade asphalt and natural asphalt compound asphalt, ordinary modified asphalt and natural asphalt compound asphalt, and polymer modified asphalt several types. Among them, the total amount of asphalt used for steel bridge deck pavement is relatively small, and low-grade asphalt is difficult to supply in smal...

Examples

Embodiment Construction

[0024] Preferred embodiments of the present invention will be described in more detail below. Although preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0025] The first aspect of the present invention provides a special modified asphalt for pouring asphalt concrete, and its raw material formula includes the following components in parts by mass: 100 parts of asphalt, SBS block copolymer (styrene-butadiene-styrene) 2-15 parts, 2-15 parts of hard asphalt and 1-10 parts of toughening agent.

[0026] In order to make the modified asphalt reach the performance of the best effect, wherein the asphalt is Shell 70#A grade road petrole...