Adhesion at asphalt-aggregate interface through surface energy
| Autor: | Fredy Alberto Reyes Lizcano, Ana Sofia Figueroa Infante, Nestor E. Cely Leal |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Heat index
Materials science TA1001-1280 Moisture Bond strength Moisture Damage 02 engineering and technology Adhesion Sandstone 021001 nanoscience & nanotechnology Limestone Surface energy Transportation engineering Surface Free Energy 020401 chemical engineering Asphalt Cohesion (geology) Cohesion Geotechnical engineering 0204 chemical engineering 0210 nano-technology |
| Zdroj: | Transportes, Vol 28, Iss 2 (2020) |
| ISSN: | 2237-1346 |
| Popis: | One of the most common problems pavements have is the loss of adhesion and cohesion due to moisture damage. Tropical countries and rainy seasons are some of the causes for this type of distress on roads. Another factor that has high influence in this damage is the mineralogy of the aggregate. This research shows the results of adhesion and cohesion between the aggregates from a limestone quarry and two types of sandstones from different quarries, highly used for roads projects from Colombia, and the asphalt 60-70 (1/10) mm, same PG58-22. For determining the adhesion and cohesion, Bitumen Bond Strength tests were made for dry and wet conditions. In addition, the Surface Free Energy was measured for the aggregates and the asphalt. The results indicated that those type of aggregates are highly susceptible to moisture damage, due all values of humidity Index Damage (HDI) were less than 0,5. This indicates that it is necessary to use modifiers for controlling the stripping of the pavements due to Moisture Damage. |
| Databáze: | OpenAIRE |
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