Enhancement of Insulating Refractory Properties of Selected Nigeria Fire-Clays Using Coconut Shell

Obidiegwu, E.O.; Esezobor, D.E.; Agunsoye, Johnson Olumuyiwa; Lawal, G. I.

doi:10.4236/jmmce.2015.36048

Cited by 12 publications

(8 citation statements)

References 3 publications

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“…Obidiegwu et al mixed Nigerian clay with ground coconut shell added in levels reaching 40% to form insulating bricks. After drying and firing at temperatures ranging from 950 to 1200°C, they measured their physical properties.…”

Section: Introductionmentioning

confidence: 99%

The use of bagasse in the preparation of fireclay insulating bricks

Hassan

Moselhy

Abadir

2018

Int J Applied Ceramic Tech

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Acidic insulating refractory bricks were prepared by mixing kaolin and grog with polystyrene (PS) beads up to 1.5% and bagasse up to 5% (by weight). This latter is a fibrous waste residue from the sugar cane industry. The bricks were dried and fired at 1250°C in a cycle lasting for 16 hours. The bricks were tested for water absorption, porosity, bulk density, cold crushing strength and thermal conductivity at three different temperatures (400, 600, and 800°C). It was concluded that bricks containing 1% PS and 3% bagasse abided by ASTM C155‐97 for C‐30 type insulating refractories with a bulk density of 1.01 g/cm3, a cold crushing strength of 4.08 MPa, and a thermal conductivity of 0.37 W/K/m at 800°C.

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Section: Introductionmentioning

confidence: 99%

The use of bagasse in the preparation of fireclay insulating bricks

Hassan

Moselhy

Abadir

2018

Int J Applied Ceramic Tech

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“…According to Shuaib Babata et al, [36] an interlocking of grains in the firing of clay materials do enhance the mechanical property (strength) of the refractory. However, all the values for Abusoro clay are within the acceptable limit (8% -13%) for use as insulating refractory materials [41].…”

Section: Linear Shrinkagementioning

confidence: 79%

Effects of Grog Additions on Some Refractory Properties of Raw (Abusoro) Kaolin Clay Deposit for Furnace Lining

Aluko

Ikubuwaje

2020

AIR

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The influence of the weight of grog on some refractory properties of raw Abusoro clay samples found in Abusoro Village, Ondo State, Nigeria was evaluated. These samples were presented for refractory tests (apparent porosity, linear shrinkage, refractoriness, bulk density and cold crushing strength). The weights of the grog were varied from 20-40 wt. % in the blend. The chemical and microstructural examinations of the untreated alumino-silicate Abusoro clay samples indicated that they are abundant in silica, SiO2 (62.74wt. %) and alumina, Al2O3 (31.42wt. %). Other minor compounds found are Fe2O3 (1.43%), K2O (0.30%) with no trace amounts of MgO (0.00); therefore, they are regarded as alumino-silicate. Particular observation is made on MgO with zero amounts and the total of K2O + Na2O + MgO which are less than 2% in the clay samples. These results signify that the clay possesses high viability for manufacturing of refractory bricks, pulp and paper, ceramics, fertilizers, paint and cement. The performance evaluations of the refractory bricks measured indicated acceptable and satisfactory results vis-à-vis standard refractory properties for refractory fireclay bricks. However, the apparent porosity (43.2%) and CCS (21.21MPa) obtained for Abusoro clay sample at 30% weight of grog may as well be suitable for insulating refractory applications. The high apparent porosity could be an indication of high content of silicon oxide in the raw clay.

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“…The experiment was repeated twice for each of the test samples of cellular ceramics and a mean temperature value was obtained. The value of the thermal conductivity [k, W/(m.°C)] for each of the samples was determined by [37,38]:…”

Section: Methodsmentioning

confidence: 99%

Evaluating the properties of cellular ceramics prepared with a granite dust and plantain (Musa paradisiaca) peel powder for external wall thermal insulation of buildings

Odewole

2021

Cerâmica

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The viability of preparing cellular ceramics suitable for external wall insulation of buildings was investigated using granite dust, ball clay, plantain peels, sodium silicate, and sodium hydroxide. The predetermined compositions of the raw materials were mixed homogeneously and then subjected to uniaxial pressing at 10 MPa. The formulated samples were oven-dried and sintered in a gas kiln at 850 °C for 3 h. The obtained cellular ceramics were then subjected to standard property tests. The results revealed water absorption of 19.5-41.7%, bulk density of 1.39-1.86 g/cm 3 , apparent porosity of 36.4-66.7%, thermal conductivity of 0.09-0.62 W/(m.K), and compressive strength of 0.9-18.4 MPa. From the results, the optimum sample of the cellular ceramics prepared is a potential thermal insulation material for load-bearing applications such as walling systems in buildings, where not only low thermal conductivity but also high mechanical strength is required.

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Enhancement of Insulating Refractory Properties of Selected Nigeria Fire-Clays Using Coconut Shell

Cited by 12 publications

References 3 publications

The use of bagasse in the preparation of fireclay insulating bricks

The use of bagasse in the preparation of fireclay insulating bricks

Effects of Grog Additions on Some Refractory Properties of Raw (Abusoro) Kaolin Clay Deposit for Furnace Lining

Evaluating the properties of cellular ceramics prepared with a granite dust and plantain (Musa paradisiaca) peel powder for external wall thermal insulation of buildings

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