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吉林省位于中国公路自然区划Ⅱ_1、Ⅱ_2、Ⅱ_3级气候区,最低气温-35℃,最高气温36℃,冬季漫长寒冷、温差大,应用粉煤灰修筑黑色高级路面基层,在路面组合设计上有其特殊要求,本文仅就有关的设计问题作一介绍。一、粉煤灰及其混合料的物理化学性质粉煤灰是煤燃烧后由锅炉烟道输出的分散细粒残渣,经回收而得到的副产品。其化学成分主要是硅、铝、铁氧化物,约占材料总重的75-95％,此外还有少量的氧化钙,氧化镁,氧化硫及未烧尽的碳等。根据所含
Jilin Province is located in the Ⅱ_1, Ⅱ_2 and Ⅱ_3 climate zones of China’s Highway Natural Division. The lowest temperature is -35 ℃ and the highest temperature is 36 ℃. The winter is long and cold with large temperature difference. Fly ash is used to build the base of black high- Its special requirements, this article only on the design issues to make an introduction. First, the physical and chemical properties of fly ash and its mixture Fly ash is a by-product of the scattered fine residue that is output from the boiler flue after coal combustion. Its chemical composition is mainly silicon, aluminum, iron oxide, accounting for about 75-95% of the total weight of the material, in addition to a small amount of calcium oxide, magnesium oxide, sulfur oxide and unburned carbon. According to contained