Analysis on Chemical Mechanism of Effects on Asphalt Binder Caused by Precipitation. International Workshop on Energy and Environment in the Development of Sustainable Asphalt Pavements
Release time:2024-08-09
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- Affiliation of Author(s):
- 土木工程学院
- Journal:
- International Workshop on Energy and Environment in the Development of Sustainable Asphalt Pavements (IWEEDSAP)
- Key Words:
- 中文关键字：无，英文关键字：asphalt pavement; moisture damage; precipitation;
- Abstract:
- The effect of precipitation on softening asphalt in asphalt pavement moisture damage is analyzed through the analysis of physical chemistry and chemical reaction among different components of asphalt and water. Soak cycle method is used by using artificial rainfall simulation cycles. Analysis is conducted on testing phenomena. The impact of water on the asphalt composition is reflected in several aspects: The strong polar asphalt components of carboxylic acid and phenolic compounds will dissolve with water and ionizing will occur. Sulfoxide class can react with water directly and its product can improve medium acidity. Asphalt acid and alkali metal oxides and salts can react and produce protosalt organic soap compounds. In the presence of water, these compounds will act as emulsifiers with the solubilization effect. When water contains hydrogen ions, they can react with divalent salts of organic acids, replace the metal ions and generate new asphalt acids. These acids can respond with low alkali metal compounds and in turn aggravate solubilization. Adhesion between Asphalt and aggregate is based on the chemical composition of the material. Asphalt with more polar substances can better wet aggregate. Softening of asphalt under water and reduction of adhesion are related to components changes under the effect of precipitation.
- Note:
- 张倩
- Co-author:
- MengXiaorong,Yanwen
- First Author:
- zhangqian
- Indexed by:
- Journal paper
- Volume:
- 卷：
- Issue:
- 期：
- Page Number:
- 页：
- Translation or Not:
- no
- Date of Publication:
- 2010-06-01