Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

Experimental–Analytical Investigation of the Properties of Concrete Containing Nano TiO₂ and Glass Fibers

Document Type : Original Article

Authors
Sina Etemadi 1
S.Mohammad Mirhosseini 2
Farzad Hatamibargh 3
Ata Hojatkashani 4
Emadaldin Hezavehi 5
1 PhD Candidate, Department of Civil Engineering, Faculty of Engineering, Ar.C., Islamic Azad University, Arak, Iran
2 Associate Professor, Department of Civil Engineering, Faculty of Engineering, Ar.C., Islamic Azad University, Arak, Iran
3 Associate Professorو Department of Structure and Earthquake Research Center (SERC), Faculty of Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.
4 Assistant Professor, Department of Civil Engineering, Faculty of Engineering, ST.C., Islamic Azad University, Tehran, Iran
5 Associate Professor, Department of Textile Engineering, Faculty of Engineering, Ar.C., Islamic Azad University, Arak, Iran
10.22065/jsce.2025.541880.3803
Abstract
The steadily rising costs associated with the repair and rehabilitation of damaged structures—primarily due to the deterioration of performance and degradation of construction materials—account for a significant portion of the financial resources in the construction industry. Reports indicate that in advanced industrialized countries, more than 40% of the construction industry’s budget is allocated to the maintenance and restoration of existing structures, while less than 60% is devoted to the construction of new ones. These figures clearly highlight the necessity of enhancing the durability of construction materials, particularly concrete. In addition to economic considerations, environmental challenges such as the pollution of water, air, and soil resources, as well as the need to preserve natural resources, have made the use of sustainable and durable materials a top priority in the construction sector. In this context, the present study aims to improve the durability and mechanical performance of concrete by evaluating its tensile strength across ten different mix designs.Experimental tests were conducted at 7, 14, 28, and 90 days. The results showed that the tensile strength of concrete increased steadily over time in all mix designs. The highest tensile strength at all ages was recorded for mix design No. 9, while the lowest was for mix design No. 1. The difference in tensile strength between these two designs was 24.7% at 7 days and 24.9% at 90 days.The average increase in tensile strength from 7 to 90 days ranged between 47% and 53%, indicating a positive trend in the mechanical properties of concrete over time. The findings of this research emphasize the importance of optimizing mix design to enhance the durability, tensile performance, and long-term stability of concrete structures.
Keywords
Tensile strength of concrete
Concrete mix design
Compressive strength
Improvement of mechanical properties
Nano Material

Subjects

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  • Receive Date 12 September 2025
  • Revise Date 10 November 2025
  • Accept Date 09 December 2025