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Performance of Nano-Silica Modified Self-Compacting Glass Mortar at Normal and Elevated Temperatures
Sakthieswaran Natarajan1, Muthuraman Udayabanu2, Suresh Ponnan3
1Department of Civil Engineering, Anna University Regional Campus⁻Tirunelveli, Tirunelveli 627007, Tamilnadu, India. sakthistructrichy@gmail.com.
Materials (Basel, Switzerland)
|February 3, 2019
Summary
This study explores using waste glass powder and nanosilica in self-compacting mortar. Results show glass powder improves thermal performance, while nanosilica enhances mechanical properties, especially after gradual cooling.
Area of Science:
- Materials Science
- Civil Engineering
- Construction Materials
Background:
- Self-compacting mortar (SCM) is crucial in modern construction.
- Investigating sustainable additives like waste glass powder is essential.
- Understanding material behavior at elevated temperatures is vital for structural safety.
Purpose of the Study:
- To evaluate the combined effects of nanosilica and glass powder on SCM properties.
- To assess the performance of self-compacting glass mortar (SGCM) at high temperatures.
- To determine the influence of cooling techniques on residual strength.
Main Methods:
- Fine aggregate in SCM was replaced with waste glass powder (10-50%).
- Mechanical properties of SGCM were tested at temperatures up to 800°C.
- Nanosilica (3% by cement weight) was added to enhance performance.
- Sudden vs. gradual cooling effects on residual strength were analyzed.
Main Results:
- Glass powder significantly improved thermal performance of SCM.
- Nanosilica addition enhanced the mechanical properties of SGCM.
- Optimal physical properties were observed near the glass transition temperature.
- Gradually cooled specimens showed superior residual strength compared to suddenly cooled ones.
Conclusions:
- Waste glass powder is an effective additive for enhancing the thermal stability of SCM.
- Nanosilica addition boosts the mechanical resilience of SGCM, particularly at high temperatures.
- Gradual cooling is a critical factor for preserving the strength of SGCM after thermal exposure.
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