A comprehensive study on the impact of human hair fiber and millet husk ash on concrete properties: response surface modeling and optimization.

Autor: Bheel N; Department of Civil and Environmental Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar Tronoh, 32610, Perak, Malaysia. naraindas04@gmail.com., Shams MA; Department of Civil and Environmental Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar Tronoh, 32610, Perak, Malaysia., Sohu S; Department of Civil Engineering, The University of Larkano, Larkana, Sindh, Pakistan., Buller AS; Department of Civil Engineering (TIEST), NED University of Engineering and Technology, Karachi, Sindh, Pakistan., Najeh T; Operation and Maintenance, Operation, Maintenance and Acoustics, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Luleå, Sweden. taoufik.najeh@ltu.se., Ismail FI; Department of Civil and Environmental Engineering, University of Nebraska-Lincoln, 1110 67Th Street, Omaha, NE, 68182-0178, USA., Benjeddou O; Department of Civil Engineering, College of Engineering, Prince Sattam Bin Abdulaziz University, 11942, Alkharj, Saudi Arabia.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Jun 12; Vol. 14 (1), pp. 13569. Date of Electronic Publication: 2024 Jun 12.
DOI: 10.1038/s41598-024-63050-7
Abstrakt: Revolutionizing construction, the concrete blend seamlessly integrates human hair (HH) fibers and millet husk ash (MHA) as a sustainable alternative. By repurposing human hair for enhanced tensile strength and utilizing millet husk ash to replace sand, these materials not only reduce waste but also create a durable, eco-friendly solution. This groundbreaking methodology not only adheres to established structural criteria but also advances the concepts of the circular economy, representing a significant advancement towards environmentally sustainable and resilient building practices. The main purpose of the research is to investigate the fresh and mechanical characteristics of concrete blended with 10-40% MHA as a sand substitute and 0.5-2% HH fibers by applying response surface methodology modeling and optimization. A comprehensive study involved preparing 225 concrete specimens using a mix ratio of 1:1.5:3 with a water-to-cement ratio of 0.52, followed by a 28 day curing period. It was found that a blend of 30% MHA and 1% HH fibers gave the best compressive and splitting tensile strengths at 28 days, which were 33.88 MPa and 3.47 MPa, respectively. Additionally, the incorporation of increased proportions of MHA and HH fibers led to reductions in both the dry density and workability of the concrete. In addition, utilizing analysis of variance (ANOVA), response prediction models were created and verified with a significance level of 95%. The models' R 2 values ranged from 72 to 99%. The study validated multi-objective optimization, showing 1% HH fiber and 30% MHA in concrete enhances strength, reduces waste, and promotes environmental sustainability, making it recommended for construction.
(© 2024. The Author(s).)
Databáze: MEDLINE
Externí odkaz: