Mechanical properties, drying shrinkage and structural performance of coconut shell lightweight concrete

Aziz, Waqas; Aslam, Muhammad Shahzad; Ejaz, Muhammad Fahad; Ali, Mehboob; Ahmad, Robiah; Raza, Mahmood; Khan, Azam

doi:10.1016/j.istruc.2021.10.092

Cited by 15 publications

(10 citation statements)

References 21 publications

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“…For fiber reinforced coconut shell concrete, the tensile strength decreases with an increase in the percentage of coconut shell. The density of CS aggregate, the orientation of the aggregate, the bond between the aggregate and the cement matrix, or the thin shape of coconut shell aggregate all contribute to a reduction in strength properties [30]. Fracture of CS aggregate was not identified in any of the tested specimens, which proves that the brittle nature of CS does not affect the strength of concrete when used as replacement for conventional aggregate [19].…”

Section: Compressive Strengthmentioning

confidence: 80%

“…Addition of coconut fiber in CS aggregate concrete also help to improve the tensile strength of coconut shell concrete [28]. Different plant fibers, steel fibers and synthetic fibers are used as the fiber reinforcement in lightweight coconut shell concreteto improve the tensile and flexural strength properties of coconut shell concrete [29], [30]. To reduce cement consumption and carbon-dioxide emission different pozzolanic industrial and agricultural waste such as fly ash, bagasse ash, quarry dust, coconut char, Coconut Ash has been used as partial replacement for cement [31], [32], [33].…”

Section: Recent Studies On Light Weight Coconut Shell Concretementioning

confidence: 99%

“…The increase in strength properties is due to the high silica content of BA which is obtained during the burning process of sugarcane fiber at 800°C in control chamber. The silica content in BA has excellent pozzolanic property which helps to improve the strength of concrete [30]. Also the lower bulk density of BA occupies small pores in the concrete mix which reduces the permeability and also increases the compressive strength [4].…”

Section: Compressive Strengthmentioning

confidence: 99%

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Influence of biomass ash and coconut shell in scrap steel fiber reinforced concrete

Vijayalakshmi¹,

Balamurugan²,

Selvam³

et al. 2023

Građ materijali i konstrukcije

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To develop a sustainable concrete solution, the aggregates and cement in the concrete mixture were partially replaced with Cocos nucifera endocarp (coconut shell) aggregate and biomass ash (sugarcane bagasse ash) respectively. The fresh and hardened properties were studied for three types of mixes (i) the concrete mix with 10-30% replacement of cement with bagasse ash (BA), (ii) Bagasse ash concrete mix with scrap steel fiber and (ii) Bagasse ash concrete with scrap fiber and 10 - 50% coconut shell aggregate. The fresh property of concrete is positively influenced by the addition of bagasse ash. With the addition of scrap fibers and coconut shell the workability reduces by 47% when compared to the control mix. The slump values recorded for all the mixes were within the permissible limit. The density of concrete decreases with the inclusion of bagasse ash and coconut shell which helps reduce the dead weight of structural elements. The mechanical property of concrete increased by 5%, 6% and 8% in compression, split and flexure modes respectively, for 10% bagasse ash steel fiber reinforced concrete. Replacement of gravel with coconut shell affects the strength properties, but all the values were within the permissible limit for structural concrete application. The SEM image analysis showed that the porosity increased with coconut shell content. From the fresh and hardened concrete test results, it was observed that the coconut shell, bagasse ash and scrap fiber can be effectively used as substitutes for concrete ingredients to develop a sustainable fiber reinforced concrete solution.

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Section: Compressive Strengthmentioning

confidence: 80%

Section: Recent Studies On Light Weight Coconut Shell Concretementioning

confidence: 99%

Section: Compressive Strengthmentioning

confidence: 99%

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Influence of biomass ash and coconut shell in scrap steel fiber reinforced concrete

Vijayalakshmi¹,

Balamurugan²,

Selvam³

et al. 2023

Građ materijali i konstrukcije

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“…In [38], lightweight self-compacting concretes with 75% CS content showed good results in properties such as water absorption, sorption capacity and resistance to chloride penetration, which were comparable to the results for concretes of the control composition. The results obtained in studies [13,39] prove the possibility of Therefore, CS is a natural raw material with a high degree of renewal, which makes it possible to use it in significant volumes without the risk of depleting it. Additionally, the application of CS in the composition or reinforcement of materials is presented in a number of the following works [13,[29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 78%

“…Therefore, CS is a natural raw material with a high degree of renewal, which makes it possible to use it in significant volumes without the risk of depleting it. Additionally, the application of CS in the composition or reinforcement of materials is presented in a number of the following works [ 13 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ]. The introduction of CS as a component is studied in detail in [ 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Alteration of Structure and Characteristics of Concrete with Coconut Shell as a Substitution of a Part of Coarse Aggregate

et al. 2023

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One of the most promising ways to solve the problem of reducing the rate of depletion of natural non-renewable components of concrete is their complete or partial replacement with renewable plant counterparts that are industrial and agricultural waste. The research significance of this article lies in the determination at the micro- and macro-levels of the principles of the relationship between the composition, the process of structure formation and the formation of properties of concrete based on coconut shells (CSs), as well as the substantiation at the micro- and macro-levels of the effectiveness of such a solution from the point of view of fundamental and applied materials science. The aim of this study was to solve the problem of substantiating the feasibility of concrete consisting of a mineral cement–sand matrix and aggregate in the form of crushed CS, as well as finding a rational combination of components and studying the structure and characteristics of concrete. Test samples were manufactured with a partial substitution of natural coarse aggregate with CS in an amount from 0% to 30% in increments of 5% by volume. The following main characteristics have been studied: density, compressive strength, bending strength and prism strength. The study used regulatory testing and scanning electron microscopy. The density of concrete decreased to 9.1% with increasing the CS content to 30%. The highest values for the strength characteristics and coefficient of construction quality (CCQ) were recorded for concretes containing 5% CS: compressive strength—38.0 MPa, prism strength—28.9 MPa, bending strength—6.1 MPa and CCQ—0.01731 MPa × m3/kg. The increase in compressive strength was 4.1%, prismatic strength—4.0%, bending strength—3.4% and CCQ—6.1% compared with concrete without CS. Increasing the CS content from 10% to 30% inevitably led to a significant drop in the strength characteristics (up to 42%) compared with concrete without CS. Analysis of the microstructure of concrete containing CS instead of part of the natural coarse aggregate revealed that the cement paste penetrates into the pores of the CS, thereby creating good adhesion of this aggregate to the cement–sand matrix.

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Scheffe's Polynomial Optimisation of Laterite Concrete Incorporating Periwinkle Shells and Coir

Ogbo,

Momoh,

Ndububa

et al. 2023

KSCE Journal of Civil Engineering

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Mechanical properties, drying shrinkage and structural performance of coconut shell lightweight concrete

Cited by 15 publications

References 21 publications

Influence of biomass ash and coconut shell in scrap steel fiber reinforced concrete

Influence of biomass ash and coconut shell in scrap steel fiber reinforced concrete

Alteration of Structure and Characteristics of Concrete with Coconut Shell as a Substitution of a Part of Coarse Aggregate

Scheffe's Polynomial Optimisation of Laterite Concrete Incorporating Periwinkle Shells and Coir

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