Category: Mortars

Mortar is an intimate mixture of binding material, fine aggregate and water. When water is added to the
dry mixture of binding material and the inert material, binding material develops the property that binds
not only the inert material but also the surrounding stones and bricks. If the cement is the binding
material, then the mortar is known as cement mortar. Other mortars commonly used are lime mortar and
mud mortar. The inert material used is sand. In this chapter, first an introduction is given to the inert
material sand and then the proportioning, mixing, curing, properties and uses of different mortars is
explained. At the end of the chapter various tests conducted on mortars is presented.

Category: Mortars Tests on Mortar

The following tests are conducted on the prepared mortars to ensure their quality: 1. Crushing Test 2. Tensile Strength Test 3. Adhesive Test. 1. Crushing Test: This test is carried out on a brick work with the mortar. This brick work is crushed in a compression testing machine and the load is noted down. Then the crushing strength is obtained as load

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Category: Mortars Special Mortar

The following are some of the special mortars: 1. Cement clay mortar 2. Gauged mortar 3. Decorative mortar. 1. Cement Clay Mortar: Quality of clay mortar can be improved by adding cement to the mix. Normal proportion of clay to cement is 1:1. It maintains the economy to some extent and there is sufficient improvements in the durability of mud-mortar. 2.

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Category: Mortars Mud Mortar

Clay lumps are collected and are wetted with water and allowed to mature for 1 or 2 days. It is kneeded well until it attains required consistancy. Sometimes fibrous materials like gobber is added in the mix. It prevents cracks in the plaster. If plaster is to be used for outer walls, it is sprayed or painted with bitumen. It is cheap

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Category: Mortars Lime Mortar

Fat lime and hydraulic limes are used for making lime mortar. If fat lime is used sand mixed is normally 2 to 3 times its volume. If hydraulic lime is used sand mixed is only 2 times the volume of lime. Lime is prepared by pounding, if quantity required is small or by grinding, if the required quantity is more. Pounding: For

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Category: Mortars Cement Mortar

For preparing mortar, first a mixture of cement and sand is made thoroughly mixing them in dry condition. Water is gradually added and mixed with shovels. The cement to sand proportion recommended for various works is as shown is Table 2.1 Curing: Cement gains the strength gradually with hydration. Hence it is necessary to see that mortar is wet till

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Category: Mortars Sand

Sand is a natural product which is obtained as river sand, nalla sand and pit sand. However sea sand should not be used for the following reasons: 1. It contains salt and hence structure will remain damp. The mortar is affected by efflorenscence and blisters appear. 2. It contains shells and other organic matter, which decompose after some time, reducing

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