Dadkhah, Masoud, Rahgozar, Reza, Barahouei Pasandi, Ehsan, Rahgozar, Peyman. (1404). Estimating the Increase in the Mechanical Characteristics of Self-Compacting Lightweight Concrete Incorporating Pumice and Steel Fibers. هنرهای کاربردی, 13(4), 1-24. doi: 10.22075/jrce.2025.34222.2109
Masoud Dadkhah; Reza Rahgozar; Ehsan Barahouei Pasandi; Peyman Rahgozar. "Estimating the Increase in the Mechanical Characteristics of Self-Compacting Lightweight Concrete Incorporating Pumice and Steel Fibers". هنرهای کاربردی, 13, 4, 1404, 1-24. doi: 10.22075/jrce.2025.34222.2109
Dadkhah, Masoud, Rahgozar, Reza, Barahouei Pasandi, Ehsan, Rahgozar, Peyman. (1404). 'Estimating the Increase in the Mechanical Characteristics of Self-Compacting Lightweight Concrete Incorporating Pumice and Steel Fibers', هنرهای کاربردی, 13(4), pp. 1-24. doi: 10.22075/jrce.2025.34222.2109
Dadkhah, Masoud, Rahgozar, Reza, Barahouei Pasandi, Ehsan, Rahgozar, Peyman. Estimating the Increase in the Mechanical Characteristics of Self-Compacting Lightweight Concrete Incorporating Pumice and Steel Fibers. هنرهای کاربردی, 1404; 13(4): 1-24. doi: 10.22075/jrce.2025.34222.2109

Estimating the Increase in the Mechanical Characteristics of Self-Compacting Lightweight Concrete Incorporating Pumice and Steel Fibers

Journal of Rehabilitation in Civil Engineering
مقاله 25، دوره 13، شماره 4 - شماره پیاپی 40، زمستان 2025، صفحه 1-24    اصل مقاله (977.92 K)
نوع مقاله: Regular Paper
شناسه دیجیتال (DOI): 10.22075/jrce.2025.34222.2109
نویسندگان
Masoud Dadkhah* 1؛ Reza Rahgozar2؛ Ehsan Barahouei Pasandi3؛ Peyman Rahgozar4
1Ph.D. Candidate, Department of Civil Engineering, Shahid Bahonar University, Kerman, Iran
2Professor, Faculty of Civil Engineering, Shahid Bahonar University, Kerman, Iran
3M.Sc., Department of Civil Engineering, Islamic Azad University, Zahedan Branch, Iran
4Ph.D., Clark Construction Group, California, Los Angeles, United States
چکیده
The incorporation of lightweight concrete significantly reduces the weight of structures. However, achieving proper density and ensuring the ease of concrete placement in structures with dense reinforcement has driven the development of self-compacting lightweight concrete (SCLC). Despite its advantages, SCLC exhibits brittleness similar to that of normal concrete. To address this limitation, steel fibers (SFs) can be integrated into SCLC to enhance its properties. In this study, SCLC was first produced using pumice aggregate. Fresh concrete properties were evaluated through Slump Flow, T50, V-Funnel, and L-Box tests, leading to the selection of an optimal mix design. Subsequently, SFs were added to the SCLC at proportions of 0.125%, 0.25%, and 0.5% by volume. The effects of SFs on the mechanical properties of SCLC were assessed through hardened concrete tests, including compressive strength, splitting tensile strength, and flexural strength tests. The results demonstrated that adding SFs to SCLC containing pumice aggregate improves mechanical strength, with the enhancement continuing up to 0.5% fiber content by volume. A predictive method for estimating the strength development of hardened samples at varying SF percentages was proposed. According to the findings, the addition of 0.25%, 0.125%, and 0.25% SFs achieved the most significant enhancements in compressive, tensile, and flexural strengths, respectively. Furthermore, incorporating pumice and SFs in concrete contributes to reduced environmental impact, improved durability, and cost reduction, promoting sustainable and efficient construction practices. Finally, three equations were developed to estimate the 28-day compressive, tensile, and flexural strengths based on SF content. Additionally, two equations were provided to predict tensile strength and modulus of rupture from the 28-day compressive strength.

تازه های تحقیق
  • Improving the mechanical characteristics of self-compacting lightweight concrete made with Taftan pumice using steel fibers.
  • Construction of self-compacting lightweight concrete using Taftan pumice due to ease of access and affordability.
  • Increasing the mechanical strength of self-compacting lightweight concrete made with Taftan pumice by adding steel fibers up to 5%.
  • Proposing predictive equations for estimating 28-day mechanical properties based on fiber content.
  • Using pumice aggregate and SFs reduces environmental impact, improves durability, and lowers costs.
کلیدواژه‌ها
Mechanical properties؛ Steel fiber؛ Pumice؛ Self-compacting concrete؛ Lightweight concrete
مراجع
آمار
تعداد مشاهده مقاله: 672
تعداد دریافت فایل اصل مقاله: 602
دانشگاه سمنان
پیوندهای مفید
آمار
تعداد نشریات22
تعداد شماره‌ها722
تعداد مقالات10,383
تعداد مشاهده مقاله72,838,494
تعداد دریافت فایل اصل مقاله64,534,994