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Power ultrasound-driven silane-modified cement paste: Insights into microstructural evolution, hydrophobic and
Guangqi Xiong1, Ying Zhao2, Zheng Fang3
1College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China; Department of Civil and Environmental Engineering & Research Centre for Resources Engineering towards Carbon Neutrality, The Hong Kong Polytechnic University, Hong Kong 999077, China.
Power ultrasound enhances silane-modified cement paste by improving mechanical strength and hydrophobicity. This treatment accelerates clinker dissolution and hydration, creating advanced cementitious materials.
Area of Science:
- Materials Science
- Civil Engineering
- Chemical Engineering
Background:
- Silane modification can adversely affect cement hydration.
- Understanding and mitigating these effects is crucial for developing advanced cementitious materials.
Purpose of the Study:
- To investigate the impact of power ultrasound on silane-modified cement paste.
- To evaluate changes in mechanical properties, hydrophobicity, and microstructure.
Main Methods:
- Systematic application of power ultrasound (240-720 W) to silane-modified cement paste.
- Assessment of compressive strength, contact angle, X-ray diffraction, and thermogravimetric analysis.
Main Results:
- Ultrasonic treatment significantly enhanced compressive strength, with a notable increase at 480 W.
- Optimal hydrophobic performance (133.0° contact angle) was achieved at 720 W.
- Accelerated clinker dissolution and increased hydration degree were observed.
Conclusions:
- Power ultrasound effectively improves the mechanical and hydrophobic properties of silane-modified cement.
- This technology shows great potential for producing advanced hydrophobic cementitious materials.
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