Estimating the Increase in the Mechanical Characteristics of Self-Compacting Lightweight Concrete Incorporating Pumice and Steel Fibers
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 advant...
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Semnan University
2025-11-01
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| Series: | Journal of Rehabilitation in Civil Engineering |
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| Online Access: | https://civiljournal.semnan.ac.ir/article_9329_d41d8cd98f00b204e9800998ecf8427e.pdf |
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| author | Masoud Dadkhah Reza Rahgozar Ehsan Barahouei Pasandi Peyman Rahgozar |
| author_facet | Masoud Dadkhah Reza Rahgozar Ehsan Barahouei Pasandi Peyman Rahgozar |
| author_sort | Masoud Dadkhah |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-9d0ae3bc4b124a699af3c63bddc2bae0 |
| institution | DOAJ |
| issn | 2345-4415 2345-4423 |
| language | English |
| publishDate | 2025-11-01 |
| publisher | Semnan University |
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| series | Journal of Rehabilitation in Civil Engineering |
| spelling | doaj-art-9d0ae3bc4b124a699af3c63bddc2bae02025-08-20T03:12:58ZengSemnan UniversityJournal of Rehabilitation in Civil Engineering2345-44152345-44232025-11-0113412410.22075/jrce.2025.34222.21099329Estimating the Increase in the Mechanical Characteristics of Self-Compacting Lightweight Concrete Incorporating Pumice and Steel FibersMasoud Dadkhah0Reza Rahgozar1Ehsan Barahouei Pasandi2Peyman Rahgozar3Ph.D. Candidate, Department of Civil Engineering, Shahid Bahonar University, Kerman, IranProfessor, Faculty of Civil Engineering, Shahid Bahonar University, Kerman, IranM.Sc., Department of Civil Engineering, Islamic Azad University, Zahedan Branch, IranPh.D., Clark Construction Group, California, Los Angeles, United StatesThe 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.https://civiljournal.semnan.ac.ir/article_9329_d41d8cd98f00b204e9800998ecf8427e.pdfmechanical propertiessteel fiberpumiceself-compacting concretelightweight concrete |
| spellingShingle | 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 Journal of Rehabilitation in Civil Engineering mechanical properties steel fiber pumice self-compacting concrete lightweight concrete |
| title | Estimating the Increase in the Mechanical Characteristics of Self-Compacting Lightweight Concrete Incorporating Pumice and Steel Fibers |
| title_full | Estimating the Increase in the Mechanical Characteristics of Self-Compacting Lightweight Concrete Incorporating Pumice and Steel Fibers |
| title_fullStr | Estimating the Increase in the Mechanical Characteristics of Self-Compacting Lightweight Concrete Incorporating Pumice and Steel Fibers |
| title_full_unstemmed | Estimating the Increase in the Mechanical Characteristics of Self-Compacting Lightweight Concrete Incorporating Pumice and Steel Fibers |
| title_short | Estimating the Increase in the Mechanical Characteristics of Self-Compacting Lightweight Concrete Incorporating Pumice and Steel Fibers |
| title_sort | estimating the increase in the mechanical characteristics of self compacting lightweight concrete incorporating pumice and steel fibers |
| topic | mechanical properties steel fiber pumice self-compacting concrete lightweight concrete |
| url | https://civiljournal.semnan.ac.ir/article_9329_d41d8cd98f00b204e9800998ecf8427e.pdf |
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