A study of the effect of water content change on the properties of foamed asphalt mixtures

Authors

  • Mohammad Samaha Tishreen University
  • Bassam Soultan Tishreen University

Abstract

With the development and progress in the manufacture of bituminous mixtures, the reality of traditional bituminous mixtures must be developed, which results in the emission of polluting gases to the environment and the workers who implement these mixtures on site. However, their production leads to energy consumption because both bitumen and gravel need to be heated. The trend towards solutions to reduce these emissions and energy, and one of these solutions is the production of foamy bituminous mixtures made of foamed bitumen, which is characterized by two characteristics: the expansion ratio and the half-life, which include in its design several factors such as air pressure, water pressure, and the temperature of heating the bitumen to a degree Foaming and a small amount of water usually (2-4)% as a percentage of the bitumen content is added to the bitumen heated to the foaming temperature to become foamy and then mixed with the pebbles at the ambient temperature, where the proportion of water is the most influential in the production of these mixtures and thus In our research, we directed to study the effect of changing the water content inside its production on its stability and strength, as we foamed bitumen with variable water ratios from 2% to 4% with an increase of 0.1%, and thus we obtained an expansion ratio and a half-life. Marshall molds and testing them on stability and flow, and comparing them with traditional mixtures, where the results of the stability of the foamy bituminous mixtures at all water levels were greater than the stability of the hot bituminous mixtures, and thus this confirms that these mixtures give improved strength to the mixture, it was found that at a water percentage of 2.3% it gave the greatest stability For the foamy mixture of 1488 kg, it increased by 22.47% over the stability of the hot bituminous mixture, and the lowest value of flow was 2.6 mm. As for the air voids and filled voids in the design of the foamed bituminous mixtures, these mixtures improved by reducing the proportion of air voids and increasing the proportion of voids filled with bitumen.

Downloads

Published

2023-12-07

How to Cite

1.
سماحه م, بسام سلطان. A study of the effect of water content change on the properties of foamed asphalt mixtures. Tuj-eng [Internet]. 2023Dec.7 [cited 2024May2];45(5):349-66. Available from: https://journal.tishreen.edu.sy/index.php/engscnc/article/view/15851

Issue

Vol. 45 No. 5 (2023): Tishreen University Journal of Research and Scientific Studies - Engineering Sciences Series

Section

Master student researches

License

Copyright (c) 2023 https://creativecommons.org/licenses/by-nc-sa/4.0/

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

The authors retain the copyright and grant the right to publish in the magazine for the first time with the transfer of the commercial right to Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series

 Under a CC BY- NC-SA 04 license that allows others to share the work with of the work's authorship and initial publication in this journal. Authors can use a copy of their articles in their scientific activity, and on their scientific websites, provided that the place of publication is indicted in  Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series   .  The Readers have the right to send, print and subscribe to the initial version of the article, and the title of  Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series     Publisher

journal uses a CC BY-NC-SA license which mean

You are free to:

  • Adapt — remix, transform, and build upon the material
  •  
  • The licensor cannot revoke these freedoms as long as you follow the license terms.

 

  • Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • NonCommercial — You may not use the material for commercial purposes.
  • ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
  • No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.