Using lignocellulosic aggregates for preparing concrete

Abstract : The use of natural lignocellulosic aggregates like wood or plant fibers instead of mineral ones for preparing concrete is hampered by several factors, mainly the facts that natural aggregates are competing with cement for water, that they have lower mechanical properties and that the highly alkaline cement-water mixture is degrading the natural fillers, releasing sugars which are retarding cement hydration. All these three factors are leading to difficulties for preparing such concrete and are strongly decreasing their mechanical resistance. After reviewing the different treatments which have been proposed in literature, we will show that it is possible to prepare plant stem fragment reinforced concrete with suitable mechanical properties with and without pre-treatments when properly taking into account the release of sugars during the cement setting process, the effect of plant genotype and the role of cement composition.
Type de document :
Communication dans un congrès
251st ACS National Meeting, Mar 2016, San Diego, United States
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01513501
Contributeur : Brigitte Hanot <>
Soumis le : mardi 25 avril 2017 - 10:53:32
Dernière modification le : jeudi 11 janvier 2018 - 06:18:22

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  • HAL Id : hal-01513501, version 1

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Patrick Navard, Thi To Loan Vo, Lucie Chupin, Jordi Girones, Thibault Cousin, et al.. Using lignocellulosic aggregates for preparing concrete. 251st ACS National Meeting, Mar 2016, San Diego, United States. 〈hal-01513501〉

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