Properties of Foamed Asphalt for Warm Mix Asphalt Applications (2015) / Chapter Skim
Currently Skimming:
Pages 83-88
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 83... ...
83 A P P E N D I X A A validated physical model for binder foaming can be an extremely useful tool to understand and explain the impact of various factors on binder foaming. For example, a physical model can be used to qualitatively explain the effects of temperature, binder type, water content, additive, and foaming nozzle (through water droplet size during mixing of binder with water)
|
From page 84... ...
84 Materials and Test Method To accomplish the aforementioned objectives, a testing program was designed to measure ERmax, bubble size distribution on the surface of the foam, and surface tension of base binders. Three binders were used for this study: N6, N7, and O7.
|
From page 85... ...
85 Image analysis of the binder foam surface at different times showed that bubbles have sizes that are much higher than 100 micrometers. Influence of Bubble Size Distribution on ERmax An analysis was conducted to determine whether the initial distribution of water droplets in the mixing unit of the foaming device and the subsequent initial distribution of the bubble diameters had an impact on ERmax.
|
From page 86... ...
86 calculated as 4,147 cm3. This translates into an ERmax of 20.7 for the 200 g of binder used in these calculations.
|
From page 87... ...
87 mixing characteristics of water droplets with the binder, consequently affecting the percentage of water that is effective in foaming. For example, Berthier (2008)
|
From page 88... ...
88 foam as long as initial bubble diameter is more than about 100 micrometers. This corresponds to an initial water droplet size of 0.016 mm or more.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.