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A Review on Cement Asphalt Emulsion Mortar Composites, Structural Development, and Performance
Hussaini Abdullahi Umar1,2, Xiaohui Zeng1, Xuli Lan1
1School of Civil Engineering, Central South University, Changsha 410075, China.
Materials (Basel, Switzerland)
|July 2, 2021
Summary
Cement emulsified asphalt (CA) mortar offers combined strength and flexibility for high-speed railway tracks. Optimizing the asphalt-to-cement ratio is key for balancing cement hydration and asphalt demulsification for improved performance.
Area of Science:
- Civil Engineering
- Materials Science
- Geotechnical Engineering
Background:
- Cement emulsified asphalt (CA) mortar is increasingly considered for high-speed railway track structures.
- It combines the high strength of cement with the flexibility of asphalt.
- Understanding its composition and material compatibility is crucial for performance enhancement.
Purpose of the Study:
- To review research on the composition, properties, and compatibility of CA mortar.
- To elucidate the interaction mechanisms between cement, asphalt emulsion, and water.
- To provide insights for improving CA mortar performance and applications.
Main Methods:
- Literature review of existing research on CA mortar.
- Analysis of the interplay between cement hydration and asphalt emulsion demulsification.
- Examination of the influence of the asphalt-to-cement ratio (A/C) on CA mortar properties.
Main Results:
- Water consumption in cement influences asphalt emulsion breakdown, while asphalt adsorption can retard cement hydration.
- An optimal A/C is necessary to synchronize cement hydration rates with asphalt demulsification.
- Recommended A/C ranges are 0.2–0.6 for CAM I and 0.6–1.2 for CAM II.
Conclusions:
- The A/C ratio critically impacts CA mortar's performance by influencing the interaction between cement hydration and asphalt demulsification.
- Further research into additives and material interactions can optimize CA mortar properties.
- This review serves as a valuable resource for understanding CA mortar composition and performance.
Keywords:
asphalt to cement ratio (A/C)compressive strengthdamping performancedemulsification of emulsified asphaltmixing methodMore Related Videos
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