Bheel Naraindas, Kennedy Charles, Zardari Shahnawaz, Salilew Waleligne Molla, Almaliki Abdulrazak H, Benjeddou Omrane
Department of Civil and Environmental Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Tronoh, 32610, Perak, Malaysia.
Civil Engineering Department, Rivers State University, Port Harcourt, Nigeria.
Sci Rep. 2024 Oct 19;14(1):24556. doi: 10.1038/s41598-024-76042-4.
This investigation purposes to use the recycling waste materials in concrete to produce a sustainable environment for construction. The Costus lucanius bagasse fiber (CLBF) was utilized as supplementary cementitious material (SCM) to analyse the workability and mechanical properties of blended cement concrete. The concrete samples were made with the inclusion of 5-20% of CLBF at several w/c ratio by applying RSM modelling and optimization. Moreover, the cubical specimens were cast to study the compressive strength (CS), while beams were used to investigate the flexural strength (FS) on 28th days correspondingly. The outcomes show that the compressive and flexural strengths were decreased with rise in proportion replacement in concrete at various w/c ratio. The highest flexural and compressive strengths was attained at 5% of CLBF at 28 days respectively. Across the tested specimens, the values of compressive strength and flexural strength ranged from 30.20 to 53.92 N/mm and 2.15-8.81 N/mm for CLBF correspondingly. Besides, the workability and water absorption of concrete is getting decreased as the content of CLBF increases while it is recorded increasing as w/c ratio increases from 0.20 to 0.40. Furthermore, response model predictions were constructed and verified applying ANOVA at an acceptable level of significance of 95%. The coefficients of R for the mathematical models ranged from 98 to 99.99%. The research study also indicated that cement can be substituted by CLBF in the production of concrete for various construction purposes.
本研究旨在利用混凝土中的回收废料，营造一个可持续的建筑环境。采用卢氏甘蔗渣纤维（CLBF）作为辅助胶凝材料（SCM），分析混合水泥混凝土的工作性能和力学性能。通过应用响应曲面法（RSM）建模和优化，制备了水灰比不同、CLBF掺量为5%-20%的混凝土样品。此外，浇筑立方体试件以研究抗压强度（CS），同时使用梁来相应地研究28天龄期的抗折强度（FS）。结果表明，在不同水灰比下，随着混凝土中CLBF替代比例的增加，抗压强度和抗折强度均降低。在28天时，CLBF掺量为5%时分别获得了最高的抗折强度和抗压强度。在所有测试试件中，CLBF对应的抗压强度值范围为30.20至53.92N/mm，抗折强度值范围为2.15至8.81N/mm。此外，随着CLBF含量的增加，混凝土的工作性能和吸水率降低，而随着水灰比从0.20增加到0.40，其工作性能和吸水率呈上升趋势。此外，构建了响应模型预测，并在95%的可接受显著性水平下应用方差分析（ANOVA）进行验证。数学模型的R系数范围为98%至99.99%。该研究还表明，在生产用于各种建筑目的的混凝土时，CLBF可以替代水泥。
