Heat Insulating Materials
The purpose of thermal insulation is to restrict the heat transfer from warmer to cooler areas. Transfer of heat takes place by three processes- the convection, the radiation and, the conduction.
Convection
In convection, heat is transferred from one place to another by the movement and mixing of liquids or gases.
Radiation
Radiation is the process of transferring heat in a similar manner to that in which light is transmitted, i.e., by means of invisible wave radiation. The extent to which a building material radiates heat is mainly dependent on the emissivity of the surface, on the temperature of the surface, and on the temperature of the surrounding surfaces; metals have very low emissivities.
Conduction
Conduction is a process whereby heat is passed on between adjacent stationary particles of matter. The conductivity of building materials depends upon their density and porosity, and upon their content. Since bulk densities of materials vary inversely to their air contents, those materials which enclose a high proportion of air in their structure are generally better heat insulators.
Water is a good heat conductor, if present in the material, makes the material a poor insulator.
The commonly used heat-insulating materials work on the principle of either air spaces formed between structural components, surface insulation, or internal insulation.
Well Known Products of Heat Insulation
- Aerated concrete
- Gypsum boards
- Fibre boards
- Asbestos cement boards
- Chipboards
- Corkboards
- Foam plastic
- Aluminium foil
- Reflecting paints
- Expanded blast furnace slag
- Vermiculate*
- Fibreglass
- Glass wool
- Cavity wall, though costly
Properties of Heat Insulating Materials
Heat insulating materials should be impermeable to water, fireproof, resistance to insect attacks, have low thermal conductivity (0.0228 kCals-cm/m2oC). Since a good heat insulating material has a porous structure the strength is lowered affecting the stability.
Also Read-
Rigid Pavements: Objective, Advantage, Disadvantage, Components, and Affecting Factors
Flexible Pavements: Objective, Advantage, Disadvantage, Components, and Affecting Factors
What do you know about Highway Construction? Let’s Check it out!
Shrinkage In Concrete: Types and Methods to Reduce
Chemical Shrinkage
Autogenous Shrinkage
Plastic Shrinkage
Drying Shrinkage
Carbonation Shrinkage
Continue Reading Shrinkage In Concrete: Types and Methods to Reduce
Soil: Definition and Names of Various Types of Soil
The term ‘soil’ in soil engineering is defined as an unconsolidated material, composed of solid particles, produced by the disintegration of rocks. The void space between the particles may contain air, water or both. The soil particles may contain organic matter.
Continue Reading Soil: Definition and Names of Various Types of Soil
Bricks: Uses, Size, Weight, Frog, Types, and Much More
What are Bricks? Bricks are one of the oldest building materials and it’s extensively used at present as a loading material in construction methods because of its…
Continue Reading Bricks: Uses, Size, Weight, Frog, Types, and Much More
Water Proofing Materials, Damp-Proofing Course, and much more
Water Proofing Materials Dampness in a building is the main cause of the deterioration of the building as well as for the ill-health of the occupants. The…
Continue Reading Water Proofing Materials, Damp-Proofing Course, and much more
Sound Insulation And Sound Insulating Materials
Sound Insulation A well-designed building should incorporate sound insulation to restrain the noise level. High noise conditions result in uncomfortable living conditions, mental strains, fatigue, and may…
Continue Reading Sound Insulation And Sound Insulating Materials
Types of Joints in Rigid Pavements: Longitudinal and Transverse
Joints are too important for the rigid pavements because the joints are responsible for reducing stresses developed due to temperature variations. There are two type of joints-
- Longitudinal Joints
- Transverse Joints
The Transverse joints are subdivided into three categories-
- Expansion Joints
- Contraction Joints
- Construction Joints
Continue Reading Types of Joints in Rigid Pavements: Longitudinal and Transverse
It’s really a cool and useful piece of info. I’m glad that you shared this helpful info with us. Please keep us up to date like this. Thanks for sharing.
of course like your website but you need to take a look at the spelling on quite a few of your posts. A number of them are rife with spelling issues and I find it very bothersome to tell the reality on the other hand I’ll surely come back again.
Here you will get to know about the heat insulating materials convection radiation and conduction in detail. This article is very knowledgeable for everyone. Here you will get to know in detail about the topic which is in demand. I enjoyed a lot while reading this article and would recommend other too.
Thank you very much for sharing about heat insulating materials convection radiation and conduction here… I really hope I can work on your tips and it works for me too, I am happy to come across your article. Great post I must admit, keep sharing more…
Your article is quite helpful! I have so many questions, and you have answered many. Thank you! Such a nice and superb article, we have been looking for this information about heat insulating materials convection radiation and conduction. Indeed a great post about it!!You must also check out Moisturebarrier.co.nz it has some great insights too.
Hi there, I enjoy reading all of your post. I wanted to write a little comment to
support you.