Properties of fired clay bricks with incorporated biomasses: Cases of Olive Stone Flour and Wheat Straw residues

Aouba, Laila; Bories, Cécile; Coutand, Marie; Perrin, Bernard; Lemercier, H.

doi:10.1016/j.conbuildmat.2015.10.040

Cited by 124 publications

(49 citation statements)

References 28 publications

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“…The literature has shown an improvement of the thermal properties using organic wastes as pore-forming agents. The thermal conductivity of the fired clay bricks decreased by 18 (Aouba et al 2016) up to 51% (Kadir and Mohajerani 2011) with a 5% by weight addition of olive stone flour or cigarette butts. However, the improvement of the thermal properties was associated with a decrease in the mechanical properties.…”

Section: Discussionmentioning

confidence: 99%

The Impact of the Particle Size Distribution of Organic Additives on the Microstructure of a Clay Ceramic and Its Thermal and Mechanical Properties

Nigay

Nzihou

Cutard

2018

J. Mater. Civ. Eng.

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In this study, the structure-property relationships of a clay ceramic with calibrated particles (10 or 50 μm) of polymethyl methacrylate (PMMA) were investigated to improve both the thermal and mechanical properties of fired clay bricks incorporating organic wastes. The structure was characterized using differential thermal, thermomechanical, and computed tomography analysis. It was found that the addition of 10-or 50-μm particles of PMMA resulted in a same 11% decrease of the thermal conductivity during the extrusion process. The Young's modulus also increased by 23% during the extrusion process with the addition of 50-μm particles. However, the addition of 10-μm particles resulted in a greater increase of the Young's modulus by 34%. The calibrated particles of PMMA were then found to transform into porosity during firing of the clay ceramic. Typically, the pore size of the clay ceramic corresponded to the particle size of the calibrated particles of PMMA. The improvement of the thermal and mechanical properties that was obtained during the extrusion process was conserved in the form of porosity with a reduction of the median pore size after the firing process. Hence, the current results indicate that the thermal and mechanical properties of fired clay bricks can be improved at the same time using a wide range of organic wastes if the organic wastes are subjected to grinding prior to incorporation in the mixture. They also suggest that organic wastes can reduce the environmental impact of fired clay bricks with an energetic contribution of 73.8%.

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Section: Discussionmentioning

confidence: 99%

The Impact of the Particle Size Distribution of Organic Additives on the Microstructure of a Clay Ceramic and Its Thermal and Mechanical Properties

Nigay

Nzihou

Cutard

2018

J. Mater. Civ. Eng.

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“…The samples using OCF showed a mechanical strength higher than those using WS. These results may be related to the pores (Aouba et al, 2016;Wagh et al, 1991;Yakub et al, 2012). The porosity increment leads to decrease thermal conductivity also has an impact on mechanical strength.…”

Section: Thermal and Mechanical Propertiesmentioning

confidence: 93%

Production of clay ceramics using agricultural wastes: Study of properties, energy savings and environmental indicators

Sani

Nzihou

2017

Applied Clay Science

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In this study, agro-wastes were used as additive raw materials for the production of fired clay ceramics. The objectives of this study are to evaluate the impact of adding agro-wastes into clay body on the thermal and mechanical properties of ceramic materials, to determine the net energy consumption and to determine gas emissions during firing process. The clay and agro-wastes were characterized by chemical elemental analysis, thermogravimetric and differential thermal analysis (TGA-DTA). The fired clay ceramics were produced with clay and optimal proportions of wheat straw (WS) and olive core flour (OCF). The thermal and mechanical properties were evaluated by measuring thermal conductivity with hot-disk method and bending test respectively. The results showed that for clay incorporated OCF (4, 8 wt%) and WS (3, 7 wt%), thermal conductivity was decreased by 16 to 30%. However, the mechanical strength of the same samples has slightly decreased respectively. TGA-DTA provided an approach to estimate the heat required or released for both clay and agro-wastes thermal decomposition. The addition of agro-wastes into the clay body showed that energy consumption of fired clay ceramics production decreased to above 36% for clay incorporated 4 wt% OCF (C-4wt %OCF). The energy saving during the firing process was a tangible outcome. In order to determine the impact of the agro-wastes addition, the environmental indicators were discussed for the clay incorporated WS and OCF respectively. Total gas yield released were measured by Micro-GC after the combustion of clay incorporated OCF and WS in fixed bed reactor respectively. The analysis of gas emissions are related to the combustion of organic and inorganic compounds of agro-wastes and clay body, respectively. The CO 2 emissions coming from the combustion of agro-wastes reached up to 4.38% for C-8wt%OCF. However, the CO 2 emissions associated with decarbonatation of clay body decreased. Adding agro-wastes into the clay body results to improving thermal properties without negative impact on the mechanical properties of ceramic materials, also to a significant energy saving and decreasing of the inorganic CO 2 emissions related to the decarbonatation of clay body. The relevance of this work, pointed out in the data presented in regards to the state-of-the art is that the paper is focused on fired clay ceramic properties, on energy savings and on the evaluation of environmental indicators in the laboratory scale.

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“…Following these guidelines, studies are being carried out in the United Kingdom applied to LCA that demonstrate that materials of biological origin such as hemp, introduced in the manufacture of construction materials, improve the environmental impact. Hemp is a natural resource that has recently been used as a low environmental impact material in a series of composite products and is increasingly used in buildings as an insulating element in exterior wall construction [13][14][15].…”

Section: Of 14mentioning

confidence: 99%

Comparative Study into the Environmental Impact of Traditional Clay Bricks and Mixed with a Biological Ingredient Using Life Cycle Analysis

Lozano-Miralles¹,

Hermoso-Orzáez²,

Martínez-García³

et al. 2018

Preprint

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Properties of fired clay bricks with incorporated biomasses: Cases of Olive Stone Flour and Wheat Straw residues

Abstract: HIGHLIGHT S • Modificatio n of bulk density, porosity and thermal conductivity of fired clay bricks with organic matter. • Technological impact of pore forming agents on shrinkage, loss of ignition. • Mechanical loss due to porosity created by fired organic matter.

Cited by 124 publications

References 28 publications

The Impact of the Particle Size Distribution of Organic Additives on the Microstructure of a Clay Ceramic and Its Thermal and Mechanical Properties

The Impact of the Particle Size Distribution of Organic Additives on the Microstructure of a Clay Ceramic and Its Thermal and Mechanical Properties

Production of clay ceramics using agricultural wastes: Study of properties, energy savings and environmental indicators

Comparative Study into the Environmental Impact of Traditional Clay Bricks and Mixed with a Biological Ingredient Using Life Cycle Analysis

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