Faculty of Engineering – University of Kufa Official Site – Faculty of Engineering
In the Faculty of Engineering at the University of El-Kuqa, a discussion of the master’s thesis was held:
Preparation and characterization of silicon dioxide (SiO2) produced from rice husk at different temperatures and its effect on concrete performance
Preparation and characterization of silicon dioxide (SiO2) from rice husk Ash (RHA) produced in different temperature on the performance of concrete
Student Enas Ahmed Mohamed from the Department of Materials Engineering. The dean of the faculty attended a part of the discussion and welcomed the discussion committee, which consisted of both Assistant Professor Dr. Fadel Abdul-Rasan from the Department of Materials Engineering, University of Technology as Chair, Assistant Professor Dr. Mohsen Abbas Aswad from the Faculty of Engineering, Babel University as a member, and Assistant Professor Jinan Hamid Saadi from the College of Engineering The University of Kufa is a member.
This thesis was supervised by two professors in different specialties, namely: Director of the Nanotechnology and Advanced Research Unit, Prof. Dr. Sabah Maysan Dahab, and Assistant Professor Dr. Iman Jaber Abd.
The researcher explained that the thesis dealt with the effect of incorporating colloidal nano silica material on the compressive strength of concrete, as silica with a size of 13.02 μm was used to develop the compressive strength of the concrete. The pilot study was conducted by replacing cement with 0.3% and 0.6% by weight of silica nanomaterials. The concrete samples were poured into cubes of 150 x 150 x 150 mm size and then soaked in water for 7 and 28 days. Silica was extracted from rice husk, which is obtained from milling rice, which contains a high amount of silica, by burning the rice husk for two hours at (900,800,750,700 ° C).
The supervisors of the thesis pointed out that the use of nanotechnology in concrete added a new dimension to the efforts made to develop its advantage, and due to the small size of the nanomaterials particles, they may affect the properties of concrete by changing the microstructure, showing the test of this study the efficiency of various techniques in order to determine the optimal technology for silica production. , By IR Spectroscopy, UV and Visible Particle Size Analyzer.
Tests carried out on concrete showed a significant increase in compressive strength at an early age and a slight increase in the total compressive strength of concrete. The strength increased with the increase in the proportion of nano-silica.
After the discussion committee recorded its observations on the thesis, which was divided between the explanation, correction, statement and the end of the discussion, the thesis was evaluated and decided to grant the student a master’s degree in materials engineering science with a grade of excellent.
