Category: Other Building Materials

Fly ash is most widely used in many profitable applications such as the following: 1. Application in Concrete as Admixture Fly ash is the widely used pozzolanic material all over the world. Addition of fly ash, apart from playing the role of an admixture, imparts the following properties to concrete: The importance and use of…

Main constituents of fly ash are: Silicon dioxide (SiO2) = 30–60% Aluminium oxide (Al2O3) = 15–30% Unburnt fuel (carbon) = up to 30% Calcium oxide (CaO) = 1–7% Magnesium oxide (MgO) = small amount Sulphur trioxide (SO3) = small amount The chemical composition of fly ash varies with the type of fuel burnt, load on…

Fly ash is a fine grained residue resulting from the combustion of pulverised coal or lignite in boilers. As it is in ash form it is easily transported by the flue gases and collected by mechanical or electrostatic separators. Mainly it consists of spherical glassy particles ranging from 1 to 150 µ m in diameter…

Some of the products of asbestos which are manufactured are discussed below. 1. Asbestos Boards Asbestos fibres and Portland cement are mixed and moulded under hydraulic pressures. These are available in board and sheet forms. Some of the commercial forms are claddings, roofing and decking units. Asbestos boards are available in natural mottled grey colour…

Following are some of the uses of asbestos:

Following are the properties of asbestos:

Natural fibre of asbestos belongs to two groups, viz., those which are readily active with acid (i.e., non-acid-resistant) and others that are acid-resistant. The first group primarily consists of chrysolite asbestos which is used for industrial purposes. The second group comprises of amonite and crocidolite asbestos. The second group is not recommended for commercial use…

Asbestos is a naturally occurring fibrous material. It is a silicate of calcium and magnesium and contains a small amount of iron oxide and alumina. The original source of asbestos was the mineral fibrous mineral actinolite.

Apart from the main building materials such as stone, brick, lime, cement, mortar, concrete, wood, etc., there are different other materials which are used fully or partly as a building construction material. The other materials which may be of concern for building construction are asbestos, fly ash, gypsum plaster, bituminous materials, glass, plastics and other…