Research Article A DOE (Response Surface Methodology) Approach to Predict the Strength Properties of Concrete Incorporated with Jute and Bamboo Fibres and Silica Fumes Jayaprakash Sridhar , 1 Dhanapal Jegatheeswaran , 2 and Ravindran Gobinath 3 1 Department of Civil Engineering, GMR Institute of Technology, Rajam, Andhra Pradesh, India 2 Department of Civil Engineering, Sona College of Technology, Salem, India 3 Department of Civil Engineering, School of Engineering, SR University, Warangal, Telengana, India Correspondence should be addressed to Ravindran Gobinath; gobinathdpi@gmail.com Received 15 June 2022; Accepted 1 September 2022; Published 17 September 2022 Academic Editor: Iman Mansouri Copyright © 2022 Jayaprakash Sridhar et al. is is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Design of Experiment approach is adopted for deriving progression variables comprising jute ﬁbres, bamboo ﬁbres, and silica fumes. To obtain the optimal combination of progression variables, the eﬀect of progression variable on the strength properties of concrete, Box–Behnken design of Response Surface Methodology was adopted. Totally four responses like compressive strength and split tensile strength at 14 days and 28 days were considered. Regression models for responses were tested using Analysis of Variance (ANOVA) and Pareto chart. e statistical importance of each progression variable was evaluated, and the attained models were articulated in second-order polynomial equation. e outcomes showed that addition of jute ﬁbres, bamboo ﬁbres, and silica fumes has enhanced the strength properties, but higher level of ﬁbres incorporation exhibited reduction in strength. Surface plot, Pareto chart, and regression analysis outcomes show that the most substantial and inﬂuence factor at 14 days and 28 days for compressive strength is Jute ﬁbres and for split tensile strength is both jute and bamboo ﬁbres. e percentage of error of the validation tests is less than 4% for compressive strength and less than 3% for split tensile strength. 1. Introduction Concrete reinforced with sustainable materials like natural ﬁbres has growing demand in the construction industry. Natural ﬁbres ensure the improvement in strength prop- erties of concrete with nonhazardous impact on the envi- ronment. To achieve this, many researchers have used natural ﬁbres as an eﬀective reinforcing material [1–4]. Natural ﬁbres help in high-energy absorption, postcracking resistance, and increased fatigue resistance of concrete [5]. Natural ﬁbres and non-natural polymer-based ﬁbres are most widely used to overcome the shortages of ﬁbre-induced concrete with polymer-based ﬁbre [6]. e deﬁciency with artiﬁcial ﬁbres is health and environment hazards and their high costs. Natural ﬁbre reinforced concrete is reinforced with jute and bamboo ﬁbres having a small diameter and discrete natural ﬁbres spread randomly in the concrete. ey are beneﬁcial concerning the energy and resources, econ- omy, environment, and conservation. It reduces crack growth and increases mechanical properties [7, 8]. Jute, hemp, coconut, sisal, and bamboo are some of the com- monly used natural ﬁbres in cement composites to improve its strength characteristics. Including natural ﬁbres in the cement matrix enhances the mechanical properties, impact strength, resistance against crack propagation, and energy captivation [9–11]. It was found that the mechanical properties, toughness, cracking behaviour, impact behav- iour, and strain capacity of concrete increase with the in- clusion of plant-based natural ﬁbres [12]. e collective outcome of silica fume and steel ﬁbres in concrete has in- creased the mechanical properties considerably, while the elastic modulus decreases due to the collective eﬀect. e Hindawi Advances in Civil Engineering Volume 2022, Article ID 1150837, 13 pages https://doi.org/10.1155/2022/1150837