A Review of Some Agricultural Wastes in Nigeria for Sustainability in the Production of Structural Concrete

Fapohunda, Christopher; Kilani, A.; Adigo, B.; Ajayi, L.; Famodimu, B. I.; Oladipupo, O.; Jeje, Afolabi

doi:10.4314/njtd.v18i2.1

Cited by 4 publications

(3 citation statements)

References 33 publications

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“…Most of the materials Future Housing deployed in modern methods of construction are conventional materials but deployed innovatively. Also, an important aspect of resource optimization literature in the study area is the use of alternative materials such as renewable materials and materials made from byproducts of industrial and agro-based processing [83][84][85]. In addition, the use of renewable energy and the adoption of passive strategies are considered other avenues for optimizing energy-based resources in the study area [86][87][88][89][90].…”

Section: The Context Of Lagosmentioning

confidence: 99%

Perspective Chapter on Promoting Circular Design Strategies in Housing Delivery in Nigeria

C. Ezema,

A. Suleman,

K. Okorigba

2023

Future Housing [Working Title]

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Circular economy principles are gradually replacing the linear economy model, which has been found to promote waste and resource inefficiency. The circular model is of particular interest to the built environment due to its benefits in resource optimization and waste minimization. Given the huge housing deficit in Nigeria and the attendant resources needed to mitigate the deficit, circular strategies are apt for the massive housing delivery required to bridge the deficit. This chapter examines the concept of circular economy as it affects the built environment. Specifically, design strategies that tend to promote circular housing delivery are examined. The public housing delivery process in use in Lagos, Nigeria’s most urbanized city is evaluated to ascertain its alignment with circular principles. The study found that even though opportunities exist for the massive deployment of circular strategies, its adoption is still very low. The chapter recommends more deliberate actions at the design and implementation stages of housing projects to promote circular economy for the housing sector in urban Nigeria.

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Section: The Context Of Lagosmentioning

confidence: 99%

Perspective Chapter on Promoting Circular Design Strategies in Housing Delivery in Nigeria

C. Ezema,

A. Suleman,

K. Okorigba

2023

Future Housing [Working Title]

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“…Researchers have thus looked into anthropogenic wastes from industrial and agricultural activities for potential sources of SCM. Many agricultural wastes that have been found suitable as SCM include cassava peel ash (CPA), sawdust ash (SDA), rice husk ash (RHA), and so on [9]. Sawdust ash, in particular, emerges as a promising candidate, reducing reliance on cement and lowering the carbon footprint of concrete [10].…”

Section: Introductionmentioning

confidence: 99%

Compressive, bending and shear properties of reinforced concrete beams containing sawdust ash as partial replacement of cement

Osanyinlokun,

Fapohunda,

Olaniyan

2024

Nig. J. Tech.

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150x600 mm for the bending test and 150x150x450 mm for the shear test) specimens were used for this investigation. The concrete cube and RC beam specimens had SDA as a partial cement replacement within the range of 0%–10% by weight of cement at 2.5% intervals. 120 RC beam specimens were cast, followed by curing and testing at 28, 60, 90, and 180 days. Using the 4-point loading method, the bending and shear responses of the beams and associated parameters, like the formation and growth of cracks, were determined during the testing. The impact of SDA replacement on the characteristics of fresh and hardened concrete was also assessed using 105 cube specimens cast, cured, and tested at 7, 14, 21, 28, 60, 90, and 180 days. A concrete mix ratio of 1:1.3:2.4 and a constant water/binder ratio of 0.50 at optimum 5% SDA replacement produced (25 N/mm2 ) the required compressive strength. The results show that workability decreases as the SDA percentage increases. Generally, the values of concrete’s densities containing SDA in the mix were in the range of standard weight applications. At 28 days, samples up to 5% recorded a higher compressive, bending, and shear strength development rate than the control mix. The results show that cement partially replaced with up to 5% SDA can produce RC that meets the requirements for concrete for structural application.

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“…In the recent times, the ash from many agricultural wastes in Nigeria have been found to possess pozzolanic characteristics and are thus used as supplementary cement in concrete [7] . The use of these wastes as concrete materials promotes sustainability in the production of structural concrete [7] .…”

Section: Introductionmentioning

confidence: 99%

Properties of Sawdust Concrete

Onyechere

2022

Jour. of build. mater. Sci.

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This work examined the structural properties of concrete obtained bypartially replacing cement with sawdust ash. The sawdust ash which is apozzolan was obtained by burning sawdust which is a waste product fromprocessing of timber in an open air. The burnt ash was passed through a150 µm metric sieve to obtain the ash used. Physical and chemical analysiswere performed on the ash to verify its suitability as a partial substitute forcement in concrete. Chemical analysis was also carried out on the OrdinaryPortland Cement (OPC) sample. Concrete mixes were produced by replacing OPC with 0%, 5%, 10%, 20% and 30% of Sawdust Ash (SDA). Bothfresh and hardened properties of the concrete produced were investigated.The chemical investigation on the ash showed that it contained most ofthe basic compounds found in OPC making it suitable to serve as a partialsubstitute for OPC in concrete. Investigation on the concrete showed thatboth the workability and density of the concrete reduce as the SDA contentincreases. Analysis on the hardened concrete revealed that the compressivestrength of the concrete decreases as the ash content increases for the earlyages of curing. However, from 21 days curing age upwards, the compressive strength decreases as SDA increases up to 10% of SDA at which thecompressive strength jumped to a maximum value, and then starts reducingagain as the percentage SDA increases. Thus, the SDA concrete gained rapid strength at later ages indicating its pozzolanic activity.

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A Review of Some Agricultural Wastes in Nigeria for Sustainability in the Production of Structural Concrete

Cited by 4 publications

References 33 publications

Perspective Chapter on Promoting Circular Design Strategies in Housing Delivery in Nigeria

Perspective Chapter on Promoting Circular Design Strategies in Housing Delivery in Nigeria

Compressive, bending and shear properties of reinforced concrete beams containing sawdust ash as partial replacement of cement

Properties of Sawdust Concrete

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