Heat-resisting and refractory concretes

Montgomery, Ronald W.

doi:10.1016/b978-075065686-3/50290-1

Cited by 3 publications

(7 citation statements)

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“…Implementing the research programme, it was necessary to mind that applied components must be cheap and accessible for producers. It is known (Robson 1967;Clavaud et al 1985;Montgomery 2003;Hewlett 2004) that, for producing refractory concrete with working temperature of over 800-900°С, use of CAC or liquid glass as a binder, and chamot, high alumina burnt clay, cordierite, mullite, corundum and other components as aggregate, is necessary. However, the cost of the above components is much higher than those selected for this research.…”

Section: Methods Materials and Experimental Programme 21 Materialsmentioning

confidence: 99%

“…It is known that dry hydrated lime and portlandite Са(ОН) 2 between 550-600°С dehydrate into the СаО form. This reaction is reversible and is, as a rule, associated with changes in volume (Montgomery 2003).…”

Section: Bindermentioning

confidence: 99%

“…Therefore, the task was to get refractory concrete with the working temperature of 1000°С using portland cement and the decision was made to research modification of portland cement concrete mixtures with mineral additive of different properties. The same tests on the application of different mineral additives as the component of refractory concrete were conducted in the existing studies (Montgomery 2003;Hewlett 2004;Fedosov et al 2008;Bazhenov 2002;Dvorkin 2007, 2011;A Reference Guide 1991;Clavaud et al 1985;Myhre 1993Myhre , 1998Sandberg and Myhre 1994). Refractoriness,°С Chemical composition Fig.…”

Section: Test Of Materials 221 Test Of Materials For Refractorinessmentioning

confidence: 99%

“…It is known that production of refractory concrete is more efficient when calcium aluminate cement (САС) or binders of sodiumpolysilicate (Montgomery 2003;Toturbiev and Porsukov 2006;Toturbiev 2010;Dvorkin 2007, 2011;Robson 1967;Clavaud et al 1985) are used. The given types of binders are more resistant to temperature than portland cement, which is less resistant to temperature impact larger than 500°С.…”

Section: Bindermentioning

confidence: 99%

“…It is usually produced with hydraulic binder (usually, alumina cement), fire-resisting and refractory components and aggregates (Montgomery 2003).…”

Section: Introduction and Objectivementioning

confidence: 99%

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Development of Compositions of Self-compacting Fine-grained Refractory Concrete

Калашников

Kornienko

Gorshkova

et al. 2014

ACT

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This paper describes the results of laboratory tests with samples of a new generation self-compacting fine-grained refractory concrete (self-flow castables -SFC refractory equivalent to self-compacting concrete -SCC) and tests of the properties of products made of the developed compositions. The tests were conducted with cube specimens 100x100x100 mm in size for developed SFC and prism specimens 40x40x160 mm in size for cement pastes. Laboratory tests were conducted to determine the residual strength after heating to 800°С and the ability of specimens to withstand sharp changes in temperature from 800°С to 20°С in water. A new method for selecting the composition by using main structural-rheological criteria (see section 3.1) was applied: ratio in volume of water-concrete dispersive mixture (rheological matrix of the first kind) over the absolute volume of fine sand /and ratio in volume of dispersive fine-grained mixture (rheological matrix of the second kind) over the absolute volume in sand-aggregateIt is shown that one of the ways to reduce the negative impact of high temperatures on the physical-mechanical properties of refractory concrete that uses Portland cement is the addition of the three slags components, that have equal thermal-expansion coefficient, amorphous silica fume of 10-15% of the cement mass. The project was conducted from

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Section: Methods Materials and Experimental Programme 21 Materialsmentioning

confidence: 99%

Section: Bindermentioning

confidence: 99%

Section: Test Of Materials 221 Test Of Materials For Refractorinessmentioning

confidence: 99%

Section: Bindermentioning

confidence: 99%

“…It is usually produced with hydraulic binder (usually, alumina cement), fire-resisting and refractory components and aggregates (Montgomery 2003).…”

Section: Introduction and Objectivementioning

confidence: 99%

See 3 more Smart Citations

Development of Compositions of Self-compacting Fine-grained Refractory Concrete

Калашников

Kornienko

Gorshkova

et al. 2014

ACT

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Applicability of Carbon Fibres in Refractory Cement Composites

2018

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The main objective of this article is to present the influence of high temperatures on mechanical properties of advanced refractory cement composite reinforced with carbon fibres. The presented material is suitable for industrial applications and can withstand elevated temperatures up to 1000 °C. The action of high temperatures was investigated on two temperature levels 600 °C and 1000 °C and was compared to reference specimens dried at 105 °C. The carbon fibres with flexural strength of 4100MPa were applied in dosage 0.50 %, 0.75% and 1.00% of the total volume. The second investigated modification was mutual ratio between aluminous cement and fine ceramic powder. The influence of high temperatures was investigated by measuring the bulk density, compressive and flexural strength, dynamic modulus of elasticity and fracture energy; all measured on prismatic specimens 40 × 40 × 160 mm. The workability of fresh mixture was limited by the maximum dosage of carbon fibres in 1% of the total volume. Based on the workability and evaluation of residual mechanical properties after temperature loading, the best was found to be the combination of carbon fibres in dosage of 0.75% by volume.

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Heat-Resistant Porous Composite Based on Ordinary Clay for Thermal Insulation of Hot Surfaces

Beregovoi

2017

KEM

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Compositions of porous compounds (density 300 to 500 kg/m3) for thermal insulation of hot surfaces up to 1300oC were developed. Ordinary clay (at a clinkering temperature of 1150...1200oC), was chosen as a main substance for structure formation. The increasing thermo-resistance fraction of a ceramic matrix composite was obtained via embedding a refractory clay and dinas fillers into compositionб as well as by means of optimizing the relationship «ordinary clay – high aluminous cement», for which the formation of additional amount of mullite phase is observed when first heating of material.

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Heat-resisting and refractory concretes

Cited by 3 publications

References 0 publications

Development of Compositions of Self-compacting Fine-grained Refractory Concrete

Development of Compositions of Self-compacting Fine-grained Refractory Concrete

Applicability of Carbon Fibres in Refractory Cement Composites

Heat-Resistant Porous Composite Based on Ordinary Clay for Thermal Insulation of Hot Surfaces

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