The use of recycled paper processing residues in making porous brick with reduced thermal conductivity

Sütçü, Mücahit; Akkurt, Sedat

doi:10.1016/j.ceramint.2009.02.027

Cited by 320 publications

(111 citation statements)

References 7 publications

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“…The smallest decreases (around 7-10%) have been recorded in samples utilizing bagasse from breweries, and urban sludge (BFB 2.5% and SDG urban 15% for Eliche-Quesada et al) (32). However, thermal conductivity depends not only on the percentage of pores but also on their size and connectivity (8). In a similar way to previous work, the thermal conductivity decreases with increasing porosity (i.e.…”

Section: Test Results and Discussionsupporting

confidence: 67%

“…Many attempts have been made to incorporate waste into the production of bricks, including sawdust, coal, paper sludge and straw (2), spent grains (3), paper mill residue and rice husk ash (4), sludge waste from the natural rubber manufacturing process (5), rubber (6), tannery sludge (7), recycled paper processing residues (8), waste tea (9), sawdust, tobacco and grass (10), cherry seeds (11), cigarette butts (12), bagasse waste (13), sugarcane bagasse (14), fly ash (15), quarry waste and slag (16) and granite powder (17), among others. Most of these kinds of recycled waste demonstrated both advantages and drawbacks.…”

Section: Introductionmentioning

confidence: 99%

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The effect of the addition of ground olive stones on the physical and mechanical properties of clay bricks

2016

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This study deals with the effect of ground olive stones (GOS) on the performance of fired clay bricks. Seven different clay-GOS mixes with 0, 1, 2, 3, 4, 5 and 10 wt % of GOS respectively were used for making fired brick samples. All samples were fired at 900 °C. The technological properties of the resultant material were then determined, including shrinkage, apparent density, pore size distribution, thermal conductivity, water absorption, and compressive and flexural strength. The addition of GOS to the mixture reduced the compressive strength of fired clay bricks. All clay brick pieces exhibited low firing shrinkage. It was apparent that as the percentage of GOS increased in the body, there was a noticeable increase in porosity. The water absorption coefficient decreased with increasing additions. The results indicated that thermal conductivity decreases with decrease in density and increase in porosity in fired clay bricks. RESUMEN: Efecto de la adición de huesos de aceituna triturados en las propiedades físicas y mecánicas de ladrillos de arcilla.En este trabajo se ha estudiado el efecto de la incorporación de huesos de aceituna triturados en las prestaciones de ladrillos de arcilla cocida. Se utilizaron siete proporciones de huesos de aceituna 0 %, 1 %, 2 %, 3 %, 4 %, 5 % y 10 % en peso. Todas las muestras se calcinaron a 900 °C y posteriormente se determinaron las propiedades resultantes, incluyendo la densidad aparente, retracción, distribución de tamaños de poro, conductividad térmica, absorción de agua y resistencias mecánicas. La adición de huesos de aceituna molidos a la mezcla redujo la resistencia a la compresión de los ladrillos de arcilla cocida. Además se observó que todas las piezas de ladrillo mostraron baja retracción tras exposición a altas temperaturas. Como era de esperar a medida que el porcentaje de huesos de aceituna molidos aumentó, la porosidad se incrementó de manera evidente. El coeficiente de absorción de agua disminuyó con el aumento del porcentaje de sustitución. Los resultados indicaron que la conductividad térmica disminuye con la disminución de la densidad y el aumento de la porosidad.

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Section: Test Results and Discussionsupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

The effect of the addition of ground olive stones on the physical and mechanical properties of clay bricks

2016

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“…Figure 9 shows the relative thermal conductivities and porosities reported for various porous ceramics [51,92,93,96]. The agreement with the empirical equation (5) is due to the variation of k 0 value with the grain size and discrepancies arising from the variation of pore sizes.…”

Section: Other Propertiessupporting

confidence: 59%

“…Relative thermal conductivity Relationship between relative thermal conductivity and porosity for various porous ceramics ( : [96], : [51], : [92], ♦: [93]). …”

Section: Porosity [%]mentioning

confidence: 99%

Porous ceramics mimicking nature—preparation and properties of microstructures with unidirectionally oriented pores

Okada

Isobe

Katsumata

et al. 2011

Science and Technology of Advanced Materials

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Porous ceramics with unidirectionally oriented pores have been prepared by various methods such as anodic oxidation, templating using wood, unidirectional solidification, extrusion, etc. The templating method directly replicates the porous microstructure of wood to prepare porous ceramics, whereas the extrusion method mimics the microstructures of tracheids and xylems in trees. These two methods are therefore the main focus of this review as they provide good examples of the preparation of functional porous ceramics with properties replicating nature. The well-oriented cylindrical through-hole pores prepared by the extrusion method using fibers as the pore formers provide excellent permeability together with high mechanical strength. Examples of applications of these porous ceramics are given, including their excellent capillary lift of over 1 m height which could be used to counteract urban heat island phenomena, and other interesting properties arising from anisotropic unidirectional porous structures.

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“…The detailed phase and thermal analysis of the paper residues were given in a previous study by Sutcu and Akkurt. 14 Mixtures containing different sources of clay and paper residues (between 20 and 50 wt% PPR) were prepared to synthesize anorthite composition (CaO·Al 2 O 3 ·2SiO 2 ). Powder mixtures were blended with ethanol in a mortar and pestle.…”

Section: Methodsmentioning

confidence: 99%

Utilization of recycled paper processing residues and clay of different sources for the production of porous anorthite ceramics

Sütçü

Akkurt

2010

Journal of the European Ceramic Society

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Production of porous anorthite ceramics from mixtures of paper processing residues and three different clays are investigated. Suitability of three different clays such as enriched clay, commercial clay and fireclay for manufacturing of anorthite based lightweight refractory bricks was studied. Porous character to the ceramic was provided by addition of paper processing residues (PPR). Samples with 30-40 wt% PPR fired at 1200-1400• C contained anorthite (CaO·Al 2 O 3 ·2SiO 2 ) as major phase and some minor secondary phases such as mullite (3Al 2 O 3 ·2SiO 2 ) or gehlenite (2CaO·Al 2 O 3 ·SiO 2 ), depending on the calcite to clay ratio. Anorthite formation for all clay types was quite successful in samples with 30-40 wt% of paper residues fired at 1300• C. A higher firing temperature of 1400• C was needed for the fireclay added samples to produce a well sintered product with large pores. Gehlenite phase occurred mostly at lower temperatures and in samples containing higher amount of calcium (50 wt% PPR). Compressive strength of compacted and fired pellets consisting of mainly anorthite ranged from 8 to 43 MPa.

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The use of recycled paper processing residues in making porous brick with reduced thermal conductivity

Cited by 320 publications

References 7 publications

The effect of the addition of ground olive stones on the physical and mechanical properties of clay bricks

The effect of the addition of ground olive stones on the physical and mechanical properties of clay bricks

Porous ceramics mimicking nature—preparation and properties of microstructures with unidirectionally oriented pores

Utilization of recycled paper processing residues and clay of different sources for the production of porous anorthite ceramics

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