Building Materials

Building materials provides information on various modern construction materials that are used these days. It also gives information about aggregates, cement, bricks, woods, reinforcement, light weight aggregates, recycled aggregates and other modern materials used in construction industry.

PROSPECTS & USES OF PLASTICS IN BUILDINGS

There are two types of Plastics, namely Thermoplastic and Thermosetting plastics distinguished by the physical property. Thermoplastics: This type can be softened by heating after they have been cured and remoulding cycle can in theory be repeated an indefinite number of times but in practice some defects may eventually take place. The curing process is(…)

SUITABILITY OF VARIOUS TYPES OF CEMENT

Suitability of various types of cement: Selection of cement based on suitability for various concreting environment is important for durability considerations of structures. Thus, making wise choice of cement type for particular construction site, prevents structure from deteriorating and saves much repair and rehabilitation cost later. Following are the suitability of various cements for different(…)

SPECIFICATION OF A GOOD QUALITY BRICK

Following are the requirement of a good quality bricks: (a)  Bricks for masonry in foundations, walls and other locations shall be hand or machine moulded and made from suitable soil and kiln burnt.  They shall have regular and uniform size and colour, sharp straight and right angled edges and deep cherry red and copper colour,(…)

SETTING PROCESS OF CEMENT

When water is mixed with cement to form a paste, reaction starts. In its pure form, the finely ground cement is extremely sensitive to water. Out of the three main compounds, viz. C3A, C3S and C2S, reacts quickly with water to produce a jelly-like compound which starts solidifying . The action of changing from a(…)

FUNCTIONS OF INGREDIENTS OF CEMENT (OPC)

Functions Of Ingredients of Cement (OPC): The ingredients of ordinary cement, as mentioned above, perform the following functions: Lime (CaO): This is the important ingredient of cement and I s proportion is to be carefully maintained. The lime in excess makes the cement unsound and causes the cement to expand and disintegrate. On the other(…)

FACTORS AFFECTING PROPERTIES OF MORTAR

Following are the factors affecting properties of mortar: The strength and extent of the bond are affected by many variables of material and workmanship. Complete and intimate contact between the mortar and the unit is essential, Workability influences the ease with which the mortar spreads and covers the surfaces. Rough units have a very porous(…)

TYPES OF MORTAR AS BINDING MATERIAL

Types of of Mortar as binding material: The kind of binding material for a mortar is selected by keeping in mind several factors such as expected working conditions, hardening temperature, moisture conditions, etc. According to the kind of binding material, the mortars are classified into the following five categories: i.  Lime mortar ii.  Surkhi mortar (…)

SELECTION OF MORTAR FOR VARIOUS WORKS

Selection of Mortar for Various Works Different grade of mortar is required for different nature of work. Special types of mortars are required under special conditions. Following table shows the types of mortars required for various works: Sl. No. Nature of work Type of mortar 1. Construction work in waterlogged areas and exposed positions Cement(…)

SPECIAL TYPES OF MORTARS

Special mortars: Following are tile various types of special mortars which are used for certain conditions: 1.  Fire-resistant mortar 2.  Lightweight mortar 3.  Packing mortar 4.  Sound-absorbing mortar 5.  X-ray shielding mortar 1.  Fire-resistant mortar: This mortar is prepared by adding aluminous cement to the finely crushed powder of fire-bricks. The usual proportion is 1(…)