Influence of types of binder and plant aggregates on hygrothermal and mechanical properties of vegetal concretes

Lagouin, Méryl; Magniont, Camille; Sénéchal, Pascale; Moonen, Peter; Aubert, Jean‐Emmanuel; Laborel-Préneron, Aurélie

doi:10.1016/j.conbuildmat.2019.06.004

Cited by 52 publications

(39 citation statements)

References 55 publications

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“…These results showed that the maximum compressive stress was not a good indicator of the use of composites. Consequently, other indicators corresponding to the stresses in the elastic behavior phase (the strain equal to 1.5% or 5%) were proposed in the literature to have comparable results representing the performance of the composites in use [15,38,42,43,65]. The decreasing trend of the compressive strength corresponding to a stress level of 1.5% with the content of aggregates is shown in Figure 18.…”

Section: Effects On the Mechanical Properties Of The Plant-based Concretementioning

confidence: 97%

“…No particular treatments are carried out on these aggregates as reported in the literature. Instead, they are directly mixed with either cement, lime, or pozzolanic binder [17,43,65].…”

Section: Cereal Strawsmentioning

confidence: 99%

“…The apparent density of the particles has been previously measured based on a straight section of stem and the corresponding area determined by image analysis and the measured height [5]. Other methods encountered in the literature include mercury intrusion porosimetry (MIP), X-ray tomography estimation [43], the water displacement method or Archimedes method [31,105], and utilization of fine sand less than 250 µm, which eliminates the voids surrounding the particles and allows to determine their exact volume [13,147].…”

Section: Plant Aggregatesmentioning

confidence: 99%

“…In the DVS method, few particles between 10 and 100 mg are put on a microbalance kept inside a sealed thermostatically controlled chamber at a constant temperature of 20 °C [28], 23 °C [7,32,43,114], or 25 °C [45,69]). Each study followed its way of programming the DVS, but the idea is to regulate the RH inside the controlled chamber in a step-wise manner from zero to more than 95% in the case of sorption and the reverse path for desorption.…”

Section: Figure 12mentioning

confidence: 99%

“…For example, Abbas et al (2020) showed that the water vapor diffusion resistance factor of the plant-based concrete (using HB binder: mix of cement and lime) made with sunflower pith (HB-S, µ = 4.7 ±0.3) and maize pith (HB-M, µ = 5.1 ±0.6) with the same mass proportions of aggregates (5wt.%) were of the same order of magnitude while that made with hemp shiv (HB-H, µ = 4.0 ±0.3) was slightly lower even with higher mass proportion (15wt.%). concluded that the water vapor permeability of sunflower bark concrete (MS, µ = 1.35 ±0.16) and maize bark concrete (µ = 1.40 ±0.20) was not significantly influenced by the nature of the aggregate [43]. However, this similarity could come from the fact that both the aggregates used were from the bark with similar properties.…”

Section: Figure 22mentioning

confidence: 99%

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A Review of the Multi-Physical Characteristics of Plant Aggregates and Their Effects on the Properties of Plant-Based Concrete

Ratsimbazafy¹,

Laborel-Préneron²,

Magniont³

et al. 2021

RPM

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The use of plant aggregates obtained from agricultural co-products mixed with mineral binders to form eco-friendly insulating building materials has been initiated for a few years to bring environmentally friendly solutions to the construction sector. Several studies on different agro-resources have already been carried out, providing various information about the properties of plant aggregates and plant-based concrete. However, the characteristics of the agricultural co-product, which allow it to qualify as a plant aggregate for plant-based concrete, are not yet very clear despite the multitude of data, especially on hemp concrete. Therefore, it is important to gather numerous but very disparate pieces of information available in the literature concerning the properties of plant aggregates and their correlations with composites. This review is based on the results of 120 articles and aims to identify the characterization methods and the multi-physical properties of plant aggregates affecting those of plant-based concrete and to propose additional factors that could influence the properties of the composites. A total of 18 plant aggregates of different origins used for plant-based concrete have been listed in the literature. In France, hemp shiv is the most studied one, but its quantity is quite low unlike cereal or oilseed straws and wood transformation residues. With the existence of several characterization methods, properties like microstructure, particle size distribution, bulk density, water absorption capacity, and chemical composition of aggregates are easily and frequently determined. In contrast, data on the apparent density of particles, the skeleton density, and the hygro-thermal properties of aggregates are rare. The particle size, density, and porosity have been identified as important parameters influencing the properties of the composites. Other parameters related to the behavior of the aggregates under wet compaction and compression of their stacking can also predict the physical and mechanical properties of the obtained plant-based concrete. Dosages of the constituents should be preferred as formulation parameters for future studies assessing the impact of the aggregate properties on the composites.

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Section: Effects On the Mechanical Properties Of The Plant-based Concretementioning

confidence: 97%

“…No particular treatments are carried out on these aggregates as reported in the literature. Instead, they are directly mixed with either cement, lime, or pozzolanic binder [17,43,65].…”

Section: Cereal Strawsmentioning

confidence: 99%