Open Access

ARTICLE

Effect of Soluble Components From Plant Aggregates on the Setting of the Lime-Based Binder

by Lepeng Wang¹, Hélène Lenormand¹, Hafida Zmamou¹, Nathalie Leblanc¹

1 UniLaSalle, Transformations & Agro-Resources Research Unit, VAM²IN (EA 7519 UniLaSalle-Université d’Artois), 3 rue du Tronquet, 76130 Mont-Saint-Aignan, France.

*Corresponding Author: Hélène Lenormand. Email: .

Journal of Renewable Materials 2019, 7(9), 903-913. https://doi.org/10.32604/jrm.2019.06788

Abstract

Plant aggregate-based building materials are a viable solution for reducing greenhouse gas emissions and providing good thermal and acoustic performances. In this study, the investigated lightweight mortars require a hydraulic reaction. Laboratory and on-site empirical observations about plant aggregate-based materials indicate a delay in setting time and a decrease in the mechanical performances of concretes based on plant aggregates. The natural origin of plant-aggregates causes a lot of variability in their properties. Related studies have shown that the incompatibility between plant aggregates and cement is mainly caused by the dissolved and decomposed components of plant aggregates in alkaline environments. Currently, no research on the specific impact of each component on the setting time of lime-based binder exists. In this work, the impact of some soluble compounds (e.g., sucrose, glucose, fructose, pectin) on the setting reaction of the lime matrix was studied using Vicat test, thermogravimetric analysis (TGA) and FT-IR spectroscopy. Experimental results showed that carbohydrates such as glucose and sucrose not only affect the setting time but also have a long-term impact on the carbonation of lime. The measure of the setting time by Vicat test appears as a possible indicator to predict the compatibility between the matrix and plant aggregates.

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