
【化】 modified asphalt; modifying asphalt
改性沥青是通过物理或化学手段对普通沥青进行性能优化处理的材料,主要目的是增强其高温稳定性、低温抗裂性、耐久性等特性。以下是综合多个权威来源的详细解释:
改性沥青是在普通沥青中掺加橡胶、树脂、高分子聚合物等改性剂(如SBS、SBR、PE等),或通过轻度氧化、硫化等工艺制成的沥青结合料。其核心机理包括:
根据改性方式可分为:
性能指标 | 改性沥青 vs 普通沥青 |
---|---|
高温稳定性 | 70℃不软化 → 抗车辙能力提升50%以上 |
低温抗裂性 | -30℃仍保持弹性 → 裂缝率降低60% |
使用寿命 | 10-15年 → 延长至20年以上 |
防水性能 | 渗透系数≤10⁻¹¹cm/s → 提升2个数量级 |
数据来源:
2020年后,复合改性技术(如SBS+胶粉+抗老化剂)和纳米改性成为研究热点。例如,添加2%纳米二氧化硅可使沥青弹性模量提高40%。
如需查看具体工程案例或改性剂配比,可参考土巴兔装修大学(-2)、搜狗百科(-4)等来源的完整信息。
改性沥青的中文拼音为“gǎi xìng lí qīng”。改性沥青是指将常规沥青与一种或多种高分子物质按照一定比例进行混合,从而提高其性能,以适应更严峻的使用条件。
The English translation of “改性沥青” is “Modified bitumen”. Modified bitumen refers to a mixture of conventional bitumen and one or more polymer substances in a certain proportion to improve its performance to adapt to more severe use conditions.
The English pronunciation of “Modified bitumen” is “/ˈmɑdəˌfaɪd bɪtʃuːmən/”.
Modified bitumen is mainly used in waterproofing applications for roofing materials, such as flat roofs or low-slope roofs. It is also commonly used in road construction, as it provides better flexibility and durability than conventional bitumen.
Synonyms for modified bitumen include polymer-modified bitumen, plastic modified asphalt, and modified asphalt binder.
The antonym for modified bitumen is conventional bitumen, which is not mixed with polymer substances.
According to Google Trends data, the search interest for “Modified bitumen” has remained relatively stable over the past 5 years, indicating a steady level of usage and interest in the term.
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