Guide To Learn
Lime has been conventionally classified into the following three types, namely 3.2.1 Fat lime This lime is also known as high calcium lime, pure lime, rich lime or white lime. Fat lime is obtained from pure limestone, shell and coral. When it is left in air, it absorbs carbon dioxide (CO2) from air and gets […]
Lime is not usually available in nature in free state. It is chiefly prepared by burning limestone. Depending on the percentage of calcium carbonate (CaCO3) in limestone, lime is classified into A, B and C types, which are used for masonry work, mortar and plaster and white washing, respectively. The type C variety is also […]
Good sand should possess the following properties: 2.4.1 Functions of sand in mortar Sand is used in mortar and concrete for the following functions: 2.4.2 Substitutes for sand Sand has now become a scarce and costly material and extraction of river sand is now said to affect the ecological balance. The use of substitutes for […]
The increase in the volume of sand due to the presence of moisture is known as bulking of sand. This is due to the fact that moisture forms a film of water around the sand particles and this results in an increase in the volume of sand. The extent of bulking depends on the grading […]
Based on the grain size distribution, sand is classified as fine, coarse and gravelly.
Sand is formed by the weathering of rocks. Based on the natural sources from which sand is obtained, it is classified as follows: 2.1.1 Pit sand This sand is obtained by forming pits in soils. It is excavated from a depth of about 1-2 m from the ground level. This sand is found as deposits […]
The commonly used building stones in India include granite, basalt and trap, limestone, marbles, gneiss, laterite, slate, etc.
A place where exposed surfaces of good quality natural rocks are abundantly available is known as ‘quarry’ and the process of taking out stones from the natural bed is known as ‘quarrying’. This is done with the help of hand tools like pickaxe, chisels, etc., or with the help of machines. Blasting using explosives is […]