ABSTRACT Cenosphere is a captivating material in the realm of cementitious materials. Its unique properties, such as being superfine, spherical, and hollow, make it a suitable additive in concrete. Fine cenosphere particles can efficiently bridge the gap among the cement particles. This increases the density and reduces porosity, thereby enhancing the performance of the concrete. The experimental results suggest that incorporating cenosphere up to 15% can lead to notable improvements in the properties of the concrete. This optimal content ensures the enhancements without detriment to the other significant characteristics of concrete. In the present scenario, cenospheres offer a sustainable solution for enlightening the characteristics of cement paste and reducing the environmental footprint of waste accumulation. materials superfine spherical hollow concrete porosity 15 scenario accumulation 1

ABSTRACT This study examines the effects of using crushed Printed Circuit Board (PCB) (also known as E-waste aggregate) in concrete as a partial substitute for regular coarse aggregate (NCA). M25 grade concrete was utilized. After substituting 0%, 10%, and 15% of the natural coarse aggregates with E-waste aggregate, three combinations were still complete. Verified examples continue to focus on strength attributes, after which long-lasting characteristics such as aquatic concentration, thermal expansion, and abrasion encounter tests were carried out. Test results proved that when the replacement percentage of Electronic waste aggregate was higher significant reduction in strength properties was noticed. It is container remains credited to the reality that incorporation of E-waste aggregate slows down the hydration process that would lead to a significant loss in strength. However, it was observed that mix made with 10% and 15% E-waste aggregate shows better resistance against durability properties than control mix concrete. It was also observed that utmost care should be taken for maintaining proper workability and removal of toxic substances in E-waste aggregate for better forte and toughness properties. PCB (PCB Ewaste E NCA. NCA . (NCA) M M2 utilized 0 0% 10 15 complete attributes longlasting long lasting concentration expansion out noticed However (NCA 1

ABSTRACT The impact of integrating Nano Silica (NS) on mechanical characteristics, resistance towards impact, and chloride penetration on concrete having Fly Ash (FA) are investigated in this research. The NS particles are subsequently mixed into concrete at one, two, three, four, and five percent of the binder’s mass, respectively. The performance of the specimens under an impact load is assessed by utilizing the drop weight impact technique, frequency on strikes, and impact force variation has been used to evaluate the specimen's impact resistance. The concrete's ability to withstand damage from chloride penetration was evaluated by determining the chloride diffusion coefficient of the samples. The test findings demonstrated that adding NS to concrete may significantly increase its mechanical characteristics as well as chloride penetration resistance. The optimum amount of NS substitution in concrete is two to three percent and it is discovered that if the proportion of NS is too large, the benefits of incorporating NS into the characteristics of the concrete are diminished, and might even have a detrimental effect on the resistance towards impact and durability of the concrete. Moreover, the experimental compressive strength and split tensile is compared with existing gene expression programming model. (NS FA (FA research one four binders binder s mass respectively technique strikes specimen concretes samples large diminished Moreover model

Concrete is an unavoidable element in modern construction. During concrete production enormous amount of CO2 is emitted which results in global warming. From the point of view of environmental protection, sustainable concrete production should be focused on. An eco-friendly solution to lessen the impact on the environment has been briefed in this article. Ground Granulated Blast furnace Slag (GGBS) and cement kiln dust have been partially replaced with cement. The strength and durability properties of GGBS and cement kiln dust-incorporated concrete were evaluated and presented. The optimal substitution percentage of GGBS and cement kiln dust was reckoned as 15% and 12% respectively. The test results fortified that the replacement of GGBS and cement kiln dust for cement in concrete becomes an eco-friendly solution from the point of view of quality and sustainability. construction CO warming protection ecofriendly eco friendly article (GGBS dustincorporated incorporated presented 15 12 respectively sustainability 1

Abstract Phosphogypsum (PG) is an industrial by-product and it has the binding properties to produce non-fired tile. Sisal fibers were supplemented with phosphogypsum to enrich the strength of the tile. In this study, the eco-friendliness of utilizing phosphogypsum with Sisal fiber in non-fired has been assessed to find the environmental impact of PG tile and compared with conventional tile. The physiochemical properties of phosphogypsum and Sisal fiber were analyzed. The strength characteristics of the phosphogypsum and Sisal combined tile have been test verified by pressing hydration process. The ideal water content and fiber content for different pressing pressures have been determined from the experimental investigation. Phosphogypsum tiles consisting of 6 wt.% sisal fiber exhibited maximum bending stress of 16.5 MPa under 15 MPa loading. Production of non-fired tile largely reduces the energy consumption and environmental impacts over conventional tile production. (PG byproduct product nonfired non fired study ecofriendliness eco friendliness analyzed process investigation wt wt. 165 16 5 16. 1 loading production

ABSTRACT River sand is becoming increasingly scarce. As a result, an alternative material is required to replace river sand in order to save river sand. In the construction of quality concrete, artificial aggregate is now frequently employed as a substitute for river sand. Coconut fibre ash (CFA) aggregate obtained from Coconut fibre is prevalent in India. Partially replacing river sand (fine aggregate) with presaturated CFA aggregate for self curing purpose is presented in the paper. Fine aggregates were replaced by CFA aggregate by 5%, 10%, 15%, 20% and 25% by volume. The workability and strength characteristics of the concrete are studied. Internal curing is the solution to today's water scarcity's insufficient curing. During compared to other mixtures, test results show that the concrete mix with 20% CFA aggregate produced better results when self curing.