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Article Dans Une Revue Fluid Dynamic and Material Process Année : 2023

Performance Improved of a Lime and Hemp-Based Concrete through the Addition of Metakaolin

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Résumé

This work describes in detail the experimental investigation of the physico-mechanical properties of nonstructural hemp concrete (usually used as insulating wall material) when the Air-lime based Tradial PF70 binder is partially replaced using Metakaolin. The objective is to reduce the amount of free Ca2+ ions in the binder as these are responsible for the degradation of vegetables particles and can therefore induce a loss of mechanical perfor-mances. In order to assess the effectiveness of pozzolanic reaction, amounts of 0%, 10%, and 20% vol. of Air-lime binder were replaced by the Metakaolin material, while testing the mechanical properties of concrete specimens containing 200% and 300% of hemp particles. Through SEM and EDX analysis, a tight relationship has been found to exist between the Metakaolin content and physical-mechanical properties of specimen. The pozzolanic reaction consumes calcium hydroxide from binder to produce Hydrated Calcium Silicates (C-S-H) and in turn, this leads to a decrease in the pH-value of the pore solution which is the main factor responsible for hemp particle degradation.

Dates et versions

hal-03946544 , version 1 (19-01-2023)

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Citer

Suzanne Daher, Amar Benazzouk, Haïkel Ben Hamed, Thierry Langlet. Performance Improved of a Lime and Hemp-Based Concrete through the Addition of Metakaolin. Fluid Dynamic and Material Process, 2023, 19 (5), pp.1091-1113. ⟨10.32604/fdmp.2023.020348⟩. ⟨hal-03946544⟩

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