Recent advances in silica-alumina refractory: A review

Sadik, Chaouki; Amrani, Iz-Eddine El; Albizane, A.

doi:10.1016/j.jascer.2014.03.001

Cited by 156 publications

(72 citation statements)

References 103 publications

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“…Thus, it has been established that these ceramic products could replace natural aggregates in concrete, due to the observed strength performance of such concretes. Furthermore, the improved properties of concrete with ceramic can be attributed to the high specific surface of ceramic [13], as well as the high concentration of silica (SiO2) and alumina (Al2O3) in ceramic amorphous phase [19,20]. As a result, the pozzolanic reactivity of ceramic in concrete can be enhanced.…”

Section: Introductionmentioning

confidence: 99%

Suitability of mortars produced using laterite and ceramic wastes: Mechanical and microscale analysis

Awoyera

Dawson

Thom

et al. 2017

Construction and Building Materials

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Using industrial wastes and local materials as artificial aggregates in cement based materials remains a relevant measure for conservation of natural sources. In this study, novel cementitious mixes containing pulverized ceramic blended cement, ceramic aggregate and laterite were systematically combined to produce cement mortars. The mortar specimens were cured in water for a maximum of 28 days. At maturity, nondestructive tests, X-ray CT scan and Ultrasonic pulse velocity, were performed on hardened mortars. Thereafter, a series of predefined properties, namely dry bulk density, compressive and flexural strength, water absorption coefficient (due to capillary) of the hardened mortars were determined. Finally, in order to understand the hydration mechanism of the materials as it relates to the strength properties, microscale tests, SEM and XRD, were used to examine the fragments of the selected mortars. From the results, a mortar sample containing 10% ceramic powder and 100% ceramic aggregate as replacements for cement and sand respectively, gave higher strength values than the reference and other mixes.Microstructural analysis of the best mix revealed that it has larger proportions of ettringite, portlandite and calcite than the reference mix, and this could be responsible for the strength 2 gained. Thus, despite the apparent low reactivity of crushed ceramic material, this can improve bonding in cement-based mixture, when used at an appropriate concentration.

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Section: Introductionmentioning

confidence: 99%

Suitability of mortars produced using laterite and ceramic wastes: Mechanical and microscale analysis

Awoyera

Dawson

Thom

et al. 2017

Construction and Building Materials

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“…This disposition proved that the raw clay material is a fireclay and belongs to the alumino-silicate subgroup. The uses for fireclay refractory brick comprise of porous refractory insulation behind furnace linings, refractory fireclay bricks and ladles [7].Refractories are frequently consumed basically in the iron and steel industries [8]. Contamination of refractories clays are usually with limited amount of impurity as contained in the oxides which are CaO, MgO, TiO 2 , Fe 2 O 3 , Mn, SO 3 , ZnO, Cl, K 2 O, P 2 O 5 , Cr 2 O 3 and alkali oxides that acts as fluxing mediator at very high temperature [9].…”

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confidence: 99%

Influence of Sintering Temperatures on Physico-Mechanical Properties and Microstructure of Refractory Fireclay Bricks

Amkpa¹,

Badarulzaman²,

Aramjat³

2016

IJET

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Abstract-ThisI. INTRODUCTION The up surge application and request for refractory bricks had motivated this research to investigate the raw clay materials used for production of refractory bricks. The raw clay materials were subjected to standard refractory fireclay brick tests requirement through the tests procedures for chemical, thermal, physical and mechanical properties [1]. Clay as a raw material varied considerably in terms of workability, structure, particle-size distribution, plasticity and mineralogical composition. These differences paved way for clays being categorized or classified into plastic clays, flint clays, kaolin clays, fireclays and ball clays [2]. In the refractory industries, they are grouped and referred to as illite, Montmorillonite and kaolinite [3]. Refractories are clay materials that are generally capable of enduring very high temperatures without deformation, structural changes or softening [4]. The type of refractories is determined by the type of refractory requirement for a specific purpose. The types are classified as acid, basic and neutral refractories [5]. Traditionally these clay materials containAl 2 O 3 .SiO 2 .H 2 O to produce alumino-silicates refractory fireclay bricks. They are further classified by temperature. When the temperature is between 1500-1700 0 C, it is branded as refractory e.g. fireclay.The temperaturebetween 1700-2000 0 Cis recognized as high refractory e.g. chromite. When thetemperature is 2000 0 C, it is referred to as super refractory e.g. zircon [5].The applications of refractories are employed in the construction of furnaceslinings, ladles, reactors, ovens and kiln [6]. This disposition proved that the raw clay material is a fireclay and belongs to the alumino-silicate subgroup. The uses for fireclay refractory brick comprise of porous refractory insulation behind furnace linings, refractory fireclay bricks and ladles [7].Refractories are frequently consumed basically in the iron and steel industries [8]. Contamination of refractories clays are usually with limited amount of impurity as contained in the oxides which are CaO, MgO, TiO 2 , Fe 2 O 3 , Mn, SO 3 , ZnO, Cl, K 2 O, P 2 O 5 , Cr 2 O 3 and alkali oxides that acts as fluxing mediator at very high temperature [9]. In the process ofiron and steel production, the use of basic oxygen furnace (BOF) for the molten iron that comes from the blast furnace is decontaminated from the scums.Refractories belonging to silica-alumina have heterogeneous microstructure with bulky grain size and reasonable rate of porosity [10]. In Nigeria, previous investigation work has been done on the characterization of the native refractory raw clay materials for the making of quality refractory fireclay bricks for furnace lining, ladles, ovens and kilns [11]. In many cases, the outcome and results of such previous work were inconclusive and not comprehensive enough to be used or adopted for industrial uses. They were not subjected to standard test requirement for refractory bricks production.The researches for an alterna...

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“…In fact, most of the ceramic component that fabricated via plastic forming and powder route for the variety applications must undergo this sintering steps [4]. Ceramic alumina has a very high melting point of about 2040 o C, therefore to produce alumina ceramic product with maximum density requires sintering temperature near the melting point, which is about 1700 -1800 o C [5,6]. There are two general approaches to enhance sintering process or to lower the sintering temperature.…”

Section: Introductionmentioning

confidence: 99%

The characterization of ceramic alumina prepared by using additive glass beads

Супрапеди

Muljadi

Sardjono

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The ceramic alumina has been made by using additive glass bead (5 and 10 % wt.). There are two kinds of materials, such as : gamma Alumina and glass bead. Synthesis of alumina was done by ball milling for 24 hours, then the mixed powder was dried in drying oven at 100 o C for 6 hours. Furthermore, the dried powder was mixed by using 2 % of PVA and continued with compacted to form a pellet with pressure of 50 MPA. The next step is sintering process with variation temperature of 1150, 1200, 1250, 1300 and 1400 o C and holding time for 2 hours. The characterization conducted are consist of test density, hardness, shrinkage, and microstructure. The results show that ceramic alumina with addition of 10 % wt. glass bead has the higher value of density, hardness and shrinkage than addition of 5% wt. glass bead. The highest characterization of ceramic alumina with addition 10 % glass bead was achieved at sintering temperature of 1400 o C with density 3.68 g/cm 3 , hardness vickers 780.40 Hv and shrinkage 15.23 %. The XRD results show that it was founds a corrundum (alpha Alumina) as dominant phase and mullite as minor phase.

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Recent advances in silica-alumina refractory: A review

Cited by 156 publications

References 103 publications

Suitability of mortars produced using laterite and ceramic wastes: Mechanical and microscale analysis

Suitability of mortars produced using laterite and ceramic wastes: Mechanical and microscale analysis

Influence of Sintering Temperatures on Physico-Mechanical Properties and Microstructure of Refractory Fireclay Bricks

The characterization of ceramic alumina prepared by using additive glass beads

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