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

Prakash, Ramaiah; Thenmozhi, R.; Raman, Sudharshan Naidu; Subramanian, Chidambaram; Divyah, N.

doi:10.1002/suco.201900162

Cited by 43 publications

(35 citation statements)

References 39 publications

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“…The only perceived limitation of the LWC is that it requires manufactured lightweight aggregates (LWA). Therefore, the use of artificial aggregates has shown reasonable costs and produce better quality compared to conventional aggregates 3,4 . Structural concrete is now available with a density range between 1,800 and 3,000 kg/m 3 as lightweight, normal aggregate and heavyweight concrete 2 …”

Section: Introductionmentioning

confidence: 99%

Characterization and behavior of basalt fiber‐reinforced lightweight concrete

Divyah

Thenmozhi

Neelamegam³

et al. 2020

Structural Concrete

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The improvised construction techniques and utilization of industrial wastes in manufacturing concrete play a major role in sustainability. The artificially manufactured aggregates are gaining importance in the present era. The use of fibers as secondary reinforcement is greatly pronounced. Sintered fly ash aggregate concrete and normal aggregate concrete with and without basalt fiber with 28 days compressive strength of 30 Mpa were cast and tested. The stress–strain curve of the lightweight concrete has a lower modulus of elasticity when compared with the normal aggregate concrete. A simple linear relationship has been developed between the mechanical properties using regression analysis. The water absorption and void ratio had a direct relationship with the sorptivity and ponding of concrete. The strength and durability aspects of the lightweight aggregate concrete had better agreement with the requirements of the structural lightweight concrete. Strict adherence to codal provisions with respect to strength and durability can be made for improvised behavior.

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Section: Introductionmentioning

confidence: 99%

Characterization and behavior of basalt fiber‐reinforced lightweight concrete

Divyah

Thenmozhi

Neelamegam³

et al. 2020

Structural Concrete

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“…The sorptivity test was carried out based on ASTM C 1585 29 to measure the water ingress in blended cement binders under capillary action 30 . The absorption (I) is measured as the ratio of the change in mass of the specimen to the product of the density of water and the cross‐sectional area of the specimen as specified in the standard.…”

Section: Experimental Programmementioning

confidence: 99%

Suitable pretreatment process for rice husk ash towards dosage optimization and its effect on properties of cementitious mortar

Kameshwar

Athira

Bahurudeen

et al. 2020

Structural Concrete

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Pretreatment processes on rice husk ash (RHA) influence its properties and in turn, the performance of concrete. However, most of the available literature captures only the influence of the RHA usage in concrete without focusing on the systematic pretreatment process and optimization of RHA dosage on physical and chemical perspective. Further, the replacements were done on weight basis, leading to higher binder volume and inaccuracies in the performance evaluation. The main objective of the present study is to adopt adequate pretreatment process and to systematically optimize the RHA dosage (vol. %) towards better strength and durability properties. Hence, the current study focuses on understanding the nature of RHA through characterization, followed by suitable pretreatment processes for enhancing the properties of RHA. The enhancement in the chemical activity of the treated RHA was assessed through pozzolanic activity tests (strength activity index, lime consumption test, and soluble silica). Based on the physical properties (particle size, surface area, and packing density), chemical characteristics (strength activity index) and the energy required, the grinding time (30 min) was optimized rationally. The optimized dosage of RHA (20% by vol.) was evaluated for its performance through fresh, mechanical, and durability properties. From the results, it is evident that adequate pretreatment, along with systematically optimized RHA dosage yields enhanced performance in concrete properties.

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“…The specific surface area of the FA is approximately 300 − 495 m 2 /kg, which helps to produce a high-density concrete matrix [20,21], and thus the use of finer FA particles results in a higher compressive strength concrete than the use of coarser ones [21]. Additionally, the FA enhances the density of concrete in the interfacial transition zone (ITZ) by reducing the permeable voids, which leads to a highly durable and high strength concrete [22][23][24]. Besides, the reduced micro-voids along the ITZ results in the high fracture toughness of the siliceous FA-based concrete [23].…”

Section: Introductionmentioning

confidence: 99%

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

Cited by 43 publications

References 39 publications

Characterization and behavior of basalt fiber‐reinforced lightweight concrete

Characterization and behavior of basalt fiber‐reinforced lightweight concrete

Suitable pretreatment process for rice husk ash towards dosage optimization and its effect on properties of cementitious mortar

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

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