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Yaghobipour, Hooman, Tavakoli, Hamidreza. (1405). Optimization of Mechanical Properties and Quality Index of Perlite Lightweight Concrete Reinforced with Microsilica and Glass Wool Fibers Using Response Surface Methodology. پژوهشنامه مدیریت اجرایی, (), -. doi: 10.22080/ceas.2026.32327.1118
Hooman Yaghobipour; Hamidreza Tavakoli. "Optimization of Mechanical Properties and Quality Index of Perlite Lightweight Concrete Reinforced with Microsilica and Glass Wool Fibers Using Response Surface Methodology". پژوهشنامه مدیریت اجرایی, , , 1405, -. doi: 10.22080/ceas.2026.32327.1118
Yaghobipour, Hooman, Tavakoli, Hamidreza. (1405). 'Optimization of Mechanical Properties and Quality Index of Perlite Lightweight Concrete Reinforced with Microsilica and Glass Wool Fibers Using Response Surface Methodology', پژوهشنامه مدیریت اجرایی, (), pp. -. doi: 10.22080/ceas.2026.32327.1118
Yaghobipour, Hooman, Tavakoli, Hamidreza. Optimization of Mechanical Properties and Quality Index of Perlite Lightweight Concrete Reinforced with Microsilica and Glass Wool Fibers Using Response Surface Methodology. پژوهشنامه مدیریت اجرایی, 1405; (): -. doi: 10.22080/ceas.2026.32327.1118

Optimization of Mechanical Properties and Quality Index of Perlite Lightweight Concrete Reinforced with Microsilica and Glass Wool Fibers Using Response Surface Methodology

Civil Engineering and Applied Solutions
مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 22 شهریور 1405
نوع مقاله: Original Article
شناسه دیجیتال (DOI): 10.22080/ceas.2026.32327.1118
نویسندگان
Hooman Yaghobipour؛ Hamidreza Tavakoli*
Department of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran
تاریخ دریافت: 14 تیر 1405،  تاریخ بازنگری: 02 شهریور 1405،  تاریخ پذیرش: 22 شهریور 1405 
چکیده
Perlite lightweight concrete has attracted considerable attention because of its low density and favorable thermal performance. However, its relatively low mechanical strength and brittle behavior still limit its structural applications. This study investigates the combined effects of microsilica content (7.5-12.5%), glass wool fiber dosage (0-1.5 vol%), and fiber length (5-50 mm) on the mechanical properties and quality index of perlite lightweight concrete. A total of 30 concrete mixtures were designed and experimentally tested under compression, and the obtained data were subsequently analyzed using response surface methodology (RSM) to evaluate factor interactions and determine the optimum mixture proportions. Compressive strength tests were conducted on all mixtures, whereas stress–strain behavior was evaluated for 14 representative mixtures selected to characterize the deformation response. Overall, the simultaneous incorporation of microsilica and glass wool fibers improved the compressive strength, ductility, and energy absorption capacity of perlite lightweight concrete. The experimental results demonstrated that the highest compressive strength of 40.0 MPa was achieved for the mixture containing 10% microsilica and 0.5% glass wool fibers with a length of 27.5 mm. In contrast, the RSM-based multi-objective optimization identified a different optimum mixture containing approximately 9.4% microsilica and 0.9% glass wool fibers, which yielded the maximum quality index (R/ρ), defined as the compressive strength-to-density ratio, representing the optimum balance between mechanical performance and density. The novelty of this study lies in integrating experimental investigation with RSM-based multi-objective optimization to distinguish between the optimum compressive strength obtained experimentally and the mathematically optimized quality index, thereby providing a practical framework for optimizing both strength and strength-to-density efficiency of structural lightweight concrete.
کلیدواژه‌ها
Perlite lightweight concrete؛ Microsilica؛ Glass wool fibers؛ Compressive strength؛ Quality index؛ Response Surface Methodology
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