Mechanical characterisation and flexural performance of eco-friendly concrete produced with fly ash as cement replacement and coconut shell coarse aggregate

Prakash, Ramaiah; Thenmozhi, R.; Raman, Sudharshan Naidu

doi:10.1504/ijesd.2019.099491

Cited by 56 publications

(50 citation statements)

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“…Hence, the addition of the FA and RHA caused a reduction of the slump value of the concrete mix; but, unexpectedly, a little higher slump was observed for the mix F10R10S5, which can be caused by the reaction between the FA and RHA and variation in mixing process. In general, the addition of the FA causes an increased workability of the concrete mix due the spherical shape of the particles, which was mentioned in several researches [20,53,54] and the RHA causes a reduction of the slump value [55]. As observed from the results of this experiment, the FA reduced the slump value of concrete, because it required more water to complete hydration and pozzolanic reactions within the mix as compared to the RHA.…”

Section: Replacement Levelsupporting

confidence: 55%

Performance of Sustainable Green Concrete Incorporated With Fly Ash, Rice Husk Ash, and Stone Dust

et al. 2021

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The performance of a sustainable green concrete with fly ash (FA), rice husk ash (RHA), and stone dust (SD) as a partial replacement of cement and sand was experimentally explored. FA and RHA have a high silica content, are highly pozzolanic in nature and have a high surface area without any treatment. These by-products show filler effects, which enhance concrete’s density. Results showed that the FA and RHA materials have good hydration behaviour and effectively develop strength at an early age of concrete. SD acts as a stress transferring medium within concrete, thereby allowing the concrete to be stronger in compression, and bending. Consequently, water absorption capacity of the sustainable concrete was lower than that of the ordinary one. However, a little reduction in strength was observed after the replacement of the binder and aggregate using the FA, RHA and SD, but the reduction was insignificant. The reinforced structure with sustainable concrete containing the FA, RHA, and SD generally fails in concrete crushing tests initiated by flexural cracking followed by shear cracks. The sustainable concrete could be categorized as a perfect material with no significant conciliation in strength properties and can be applied to design under-reinforced elements for a low-to-moderate service load.

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Section: Replacement Levelsupporting

confidence: 55%

Performance of Sustainable Green Concrete Incorporated With Fly Ash, Rice Husk Ash, and Stone Dust

et al. 2021

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“…In terms of natural resource usage, aggregates occupy approximately 60–80% of the volume of concrete 1 . To ensure the availability of resources for next generations, developing some measures that focus on energy conservation and limited usage of non‐renewable energy resources is necessary 2 . Researchers have been working towards enhancing the sustainability and the energy efficiency of the construction industry 3–7 .…”

Section: Introductionmentioning

confidence: 99%

An investigation of key mechanical and durability properties of coconut shell concrete with partial replacement of fly ash

Prakash¹,

Thenmozhi²,

Raman

et al. 2020

Structural Concrete

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This study investigated the effect of adding fly ash on the mechanical and durability characteristics of coconut shell (CS) concrete. Two different mixes were developed, one with CS and the other with conventional aggregate and CS as coarse aggregate. Cement was replaced with Class F fly ash in terms of weight at 0, 10, 20, and 30% in both mixes. Test result showed that the CS concrete with 10% fly ash replacement level exhibited the highest compressive and tensile strength. The addition of fly ash decreased the porosity of CS concrete due to its fineness and increased hydration products in the matrix at later ages. Additionally, it also improved the weak aggregate interfacial transition zone of CS lightweight concrete. Thus, the fly ash addition in CS concrete showed lower values of water absorption, permeable voids, sorptivity, and chloride permeability. Furthermore, the increasing content of fly ash addition improved the durability characteristics of CS concrete considerably.

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“…Structural lightweight concrete can be produced by replacing conventional aggregates with alternative lightweight aggregates, such as pumice, blast-furnace slag, vermiculite, expanded clay, clinker, foamed slag and OPS [7]. In the same manner, the replacement of conventional coarse aggregates with CS has enabled the establishment of structural lightweight concrete [8,9]. According to Basri et al [10], the organic origin of wood-based material will not contaminate or leach to produce toxic substances once if they are incorporated into concrete matrix.…”

Section: Introductionmentioning

confidence: 99%

Fibre reinforced concrete containing waste coconut shell aggregate, fly ash and polypropylene fibre

Prakash

Thenmozhi²,

Raman

et al. 2020

Rev.Fac.Ing.Univ.Antioquia

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The aim of this study is to investigate the effect of polypropylene fibre addition into eco-concrete made with fly ash, an industrial by product, as partial cement replacement material, and coconut shell, an agricultural waste, as coarse aggregates, on the mechanical properties of the concrete. Two different mixes were developed, one with coconut shell only as coarse aggregates, and the other with the combination of both conventional aggregates and coconut shell as coarse aggregates. The cement content was replaced with class F fly ash at 10% by weight in the concrete mixes. The volume fractions of polypropylene fibres used in this study were 0.25%, 0.5%, 0.75% and 1.0%. The addition of polypropylene fibres slightly reduces the slump and density of coconut shell concrete. As the volume fraction of fibres increases, the compressive strength and modulus of elasticity of coconut shell concrete also increases by up to 0.5% of fibre volume fraction. The split tensile strength and flexural strength of coconut shell concrete were also enhanced with fibre addition. The addition of 0.75% and 1.0% volume fractions of polypropylene fibres slightly reduces compressive strength. Results of this study show that polypropylene fibres may be used in coconut shell concrete to improve the mechanical properties of the composite.

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Mechanical characterisation and flexural performance of eco-friendly concrete produced with fly ash as cement replacement and coconut shell coarse aggregate

Cited by 56 publications

References 0 publications

Performance of Sustainable Green Concrete Incorporated With Fly Ash, Rice Husk Ash, and Stone Dust

Performance of Sustainable Green Concrete Incorporated With Fly Ash, Rice Husk Ash, and Stone Dust

An investigation of key mechanical and durability properties of coconut shell concrete with partial replacement of fly ash

Fibre reinforced concrete containing waste coconut shell aggregate, fly ash and polypropylene fibre

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