泡沫沥青冷再生混合料设计方法的探讨

Approach to Design Procedures for Cold Recycling Mixture with Foamed Bitumen

结合室内研究成果和工程应用经验,提出了泡沫沥青冷再生混合料的设计方法。设计内容包括:材料与级配设计、沥青及沥青发泡特性、拌和用水量的确定、试件的成型与养护、泡沫沥青最佳用量的控制指标讨论以及泡沫沥青最佳用量的确定方法等。通过实践应用证明这种基于水稳性的泡沫沥青混合料配合比设计方法可作为室内研究和工程应用的主要指导依据。

In the light of achievements researched in lab and applied experiences, the paper poses design procedures for cold recycling mixture with foamed bitumen. Design contents include the design of material and gradation,bitumen and its foaming behavior, determination of mixing water consumption,formation and curing of specimen, controlling target for optimized consumption of foamed bitumen along with methods controlling it. Practical apcation testifies that design procedures for propotioning of foamed bitumen mixture, based on water stability, might be regarded as a main guiding basis for research in lab and project application.