Experimental study on concrete by partial replacement of cement with fly ash and coarse aggregates with palm kernel shells (Pks) and with addition of hybrid fibers

Padavala, Siva Shanmukha Anjaneya Babu; Dey, Subhashish; Veerendra, G.T.N.; Phani Manoj, Akula Venkata

doi:10.1016/j.cinorg.2024.100033

Cited by 1 publication

(2 citation statements)

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“…The study suggests that lightweight concrete, which is cost-effective, can be produced by combining fly ash and palm kernel shells. Such an approach can facilitate the construction of affordable housing while conserving raw materials [54,55]. The study review underscores the potential benefits of incorporating CDA in concrete production, including cost reduction, enhanced compressive strength, and improved durability against specific environmental stressors.…”

Section: Introductionmentioning

confidence: 99%

“…However, it also highlights the importance of managing workability challenges associated with higher levels of CDA replacement by adjusting the water content in concrete mixes. The reviewed papers suggest an optimum replacement level of 20% CDA in concrete, which enhances compressive strength compared to conventional concrete mixes [54]. Table 2 presents experimental investigations on replacing cement with CDA in concreting.…”

Section: Introductionmentioning

confidence: 99%

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Sustainable Concrete Production: Utilizing Cow Dung Ash and Corn Stalk Ash as Eco-Friendly Alternatives

Jamwal,

Nautiyal,

Singh

et al. 2024

Civ Eng J

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This study aims to determine whether it is feasible to replace conventional materials used in manufacturing concrete with waste materials, namely cow dung ash and corn stalk ash. This study proposes to assess the possibility of using these agricultural by-products to improve the sustainability of concrete while simultaneously tackling the environmental issues related to the manufacture of conventional concrete. The research aims to assess the mechanical qualities, optimize the mix proportions, and examine the ecological implications of using these substitute materials. This research aims to mitigate environmental challenges like carbon dioxide emissions, resource depletion, and the accumulation of agricultural waste by combining agricultural waste and lowering dependency on traditional cement. The study investigates the use of cow dung ash (CDA) and corn stalk ash (CSA) as alternatives for conventional Portland cement (OPC) in mortar mixes at varying quantities, ranging from 5% to 25% CDA and 2.5% to 10% CSA. Chemical composition reveals that CDA and CSA predominantly comprise O, Mg, Al, Si, P, K, and Ca. The workability, hardened characteristics, and microstructure of CDA and CSA were assessed. Increasing CDA and CSA percentages reduced mortar workability; nevertheless, replacing 8% to 10% CDA and 7.5% CSA maintained compressive, tensile, and flexural strengths comparable to control mixes. However, more significant CDA and CSA proportions resulted in lower mortar strength. For example, 10% CDA-enriched mortar had a compressive strength of 31.77 N/mm2, a tensile strength of 3.42 N/mm2, and a flexural strength of 3.61 N/mm2, whereas 7.5% CSA-enriched mortar had a compressive strength of 28.4 N/mm2, a tensile strength of 3.04 N/mm2, and a flexural strength of 3.7 N/mm2. According to the findings, CDA and CSA can replace OPC by up to 10% and 7.5% in mortar manufacturing, making cementitious material alternatives viable. Doi: 10.28991/CEJ-SP2024-010-02 Full Text: PDF

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%