Accessible Requires Authentication Published by De Gruyter July 29, 2021

Enhancing the Stability of Asphalt Emulsion Using Environmentally Friendly Cationically Modified Hydroxyethyl Cellulose (CMHEC) at Different Concentrations and pH Values

Verbesserung der Stabilität von Asphaltemulsionen mit umweltfreundlicher, kationisch modifizierter Hydroxyethylcellulose (CMHEC) bei verschiedenen Konzentrationen und pH-Werten
Xiaoxi Wang, Runhan Hou, Qian Zhang, Osama M. Darwesh, Mengyao Gao, Zixu Zhang and Yuexin Wang

Abstract

The cationically modified hydroxyethyl cellulose (CMHEC) was synthesized successfully and applied for preparing the cationic asphalt emulsion. The apparent viscosity and phase separation of the emulsion were studied at different CMHEC concentrations and pH values. The results indicated that the apparent viscosity of the emulsion was increased with increasing CMHEC concentration, and the phase separation was significantly reduced correspondingly. In addition, the effect of pH value on the emulsion quality was involved. The apparent viscosity of the emulsion showed the tendency to decrease firstly and then increase to the minimum value at pH 2. All results indicated that CMHEC has excellent potential in the manufacture of asphalt emulsion and the research of the pH effect on the formulation of asphalt emulsion has essential significance.

Zusammenfassung

Die kationisch modifizierte Hydroxyethylcellulose (CMHEC) wurde erfolgreich synthetisiert und zur Herstellung der kationischen Asphaltemulsion verwendet. Die scheinbare Viskosität und die Phasentrennung der Emulsion wurden bei verschiedenen CMHEC-Konzentrationen und pH-Werten untersucht. Die Ergebnisse zeigten, dass die scheinbare Viskosität der Emulsion mit zunehmender CMHEC-Konzentration anstieg und die Phasentrennung dementsprechend deutlich reduziert wurde. Außerdem wurde der Einfluss des pH-Wertes auf die Emulsionsqualität mit einbezogen. Die scheinbare Viskosität der Emulsion nahm zunächst ab und stieg dann bei pH 2 auf den Minimalwert an. Alle Ergebnisse wiesen darauf hin, dass CMHEC ein ausgezeichnetes Potenzial für die Herstellung von Asphaltemulsionen besitzt und die Erforschung des pH-Effekts von wesentlicher Bedeutung auf die Formulierung von Asphaltemulsionen ist.


Prof. Yuexin Wang Hebei University of Technology Guangrong Road No. 8 Hongqiao District Tianjin 300130 Tel.: 86-02260200436

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Received: 2020-12-16
Accepted: 2021-02-02
Published Online: 2021-07-29
Published in Print: 2021-07-31

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