|
Title
|
|
|
|
Laboratory tests to evaluate the stiffness of foamed bitumen stabilised mixtures
| |
|
Author
|
|
|
|
| |
|
Abstract
|
|
|
|
| Due to rising oil prices and global warming, the road industry needs to shift to more durable and environmentally friendly production methods, transport and material use. Cold in-situ pavement recycling with foamed bitumen appears to be a sustainable solution because this technology works with significantly lower energy, requires less transportation, and avoids the use of new materials. However, further research is needed to optimise the effective use of foamed bitumen mixes. This paper investigates the stiffness properties of foamed bitumen mixes blended with 100% reclaimed asphalt pavement (RAP). The cement content was kept constant at 1.0% in this study. Laboratory tests were performed on three different types of mixtures with bitumen content 2.0%, 2.5%, and 3.0% with respect to indirect tensile stiffness modulus (ITSM) and indirect tensile 13th Conference on Asphalt Pavements for southern Africa 2 | Page strength (ITS). The specimens were subjected to ITSM tests at 5 °C, 15 °C, and 25 °C and at pulse rise times of 50 ms, 124 ms and 200 ms. The results showed that with increasing temperature, the ITSM values of the mixtures decreased. Based on the results obtained, the effect of temperature on the mechanical performance of foamed bitumen mixtures is discussed. |
| |
|
Language
|
|
|
|
English
| |
|
Source (book)
|
|
|
|
CAPSA 13th Conference on Asphalt Pavements for Southern Africa (CAPSA2023), 15-18 October, 2023, Drakensberg, South Africa
| |
|
Publication
|
|
|
|
2023
| |
|
Volume/pages
|
|
|
|
p. 1-10
| |
|
Full text (publisher's version - intranet only)
|
|
|
|
| |
|