Determination of Thermal Conductivity on Lightweight Concretes

Lenka Bodnárová; Jitka Hroudová; Jiří Zach; Kateřina Sovová

doi:10.4028/www.scientific.net/KEM.677.163

Paper Titles

Changes of the Properties of Cement Paste with Fly Ash Exposed to the High Temperature
p.138

Resistance of Concrete with Metakaolin Addition to Acid Environment
p.144

Influence of the Heating and Cooling Rate on Thermal Performance of Cement-Lime Plaster with PCM Admixture
p.150

Finite Element Simulation of Hydration Heat Using Fuzzy Logic Model of Hydration
p.157

Determination of Thermal Conductivity on Lightweight Concretes
p.163

Using 2D Digital Image Analysis to Locate Position of Micro Fibers in Cross-Sections of Fiber-Reinforced Concrete
p.169

Plastic Shrinkage of Concrete – Measurement and Method for its Reducing
p.175

Evaluation of the Modulus of Elasticity of Different Types of Concrete Compared with Eurocode 2
p.181

Basic Physical and Mechanical Properties of Composites Based on Three Different Cements
p.186

HomeKey Engineering MaterialsKey Engineering Materials Vol. 677Determination of Thermal Conductivity on...

Determination of Thermal Conductivity on Lightweight Concretes

Abstract:

A range of testing methods were used to study the potential structural changes as a result of the effects of high temperatures on lightweight types of concrete developed above all for fire resistant structures. One such test for monitoring changes in concrete structures is the non-stationary determination of the coefficient of thermal conductivity using the hot wire method. The matrix structure progressively collapses as a result of the effects of high temperatures on the concrete structure ́s surface because erosion takes place of the matrix and aggregate porous structures. The degradation of the porosity of the concrete results in the deterioration of its thermal insulating properties. This paper assesses the dependence of the thermal conductivity coefficient of lightweight concretes on temperature and determines the potential occurrence of structural changes in the lightweight concrete matrix. The results were verified using other methods to determine the concrete ́s resistance to thermal load.

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Periodical:

Key Engineering Materials (Volume 677)

Pages:

163-168

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.677.163

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Cite this paper

Online since:

January 2016

Authors:

Lenka Bodnárová, Jitka Hroudová*, Jiří Zach, Kateřina Sovová

Keywords:

Cement, Concrete, Fibres, Fire Safety, Lightweight Aggregate, Thermal Conductivity

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References

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