What is a Mortar?
Mortar is a mixture of cement, sand and lime. The mortar is just used for the binding material. It has the ingredients in fixed proportions for a particular kind of structure. Mortar questions based on this concept can be seen in the GATE exam. The mortar mix is similar to the concrete but has no aggregate material. It is generally used for the construction of brick masonry or stone masonry for the binding of bricks or stones.
Building mortar has only a combination of cement and sand. It has some different properties that will be explained further. Properties of mortar include its workability, compressive strength and bond strength etc. Mortar properties also include its water retention capacity, mobility and other properties.
The definition of a mortar mix can be said that a mixture of cement, sand, lime and water. These ingredients are mixed together in a definite proportion. These mortars are used to hold bricks and stones in masonry-type structures. Mortar is a workable paste material used as a binding material in many masonry structures.
A mortar is a mixture of sand with a binding agent. Cement or lime is generally used as the binding agent of the mortar. Water in the mix will be added in definite proportions. It can bind the stone or bricks in the masonry structure.
Types of Mortar
Different types of mortar will depend on the ingredients used to mix the mortar. Mortar can be classified into different types based on their bulk density, binding materials, nature of its applications, etc. Using sand in the mortar improves its density, setting time, shrinkage strength, etc. Different types of mortar have different properties, which can be used to formulate the MSQ-based questions in the GATE CE question paper. Based on the properties of mortar, they can be used for multiple purposes. Here are some classifications of mortar given below based on their properties.
- Stone laying mortar
- Cement mortar
- Lime mortar
- Gauged mortar
- Gypsum mortar
- Surakhi mortar
- Aerated cement mortar
Uses of Brick and Mortar in a Structure
Brick is a type of block that is used to construct walls. And mortar is the binding material used to bind bricks and stones. A structure consists of many members connected properly so that load is transferred properly from one point to another.
Various structural binding materials can be found, like cement paste, mortar slurry, etc. These binding materials have different compositions based on their use for different purposes. In a structure, mortar can also carry out plastering work.
Properties of Mortar
Mortar has different properties based on the ingredients used to make the mortar. Generally, it is a mixture of cement, sand, lime and water. Its properties can be described below based on the ingredients used to make mortar.
- A good mortar should develop proper adhesion with the bricks or stones.
- It should also be capable of withstanding the designed level of stress.
- A good mortar should have the least possible cost.
- It should be durable so that it can sustain the joined material.
- It should be working properly.
- It should be set properly in sufficient time.
Tests for Mortars
A mortar should be properly designed so that it works properly. So, it’s necessary to find mortars' strength and other characteristics before use. Tests on mortar are briefly mentioned in the GATE syllabus. Here some tests are given to determine the different characteristics of mortars.
- Crushing strength test: Masonry structures are tested for the crushing strength of mortar so they can resist the load properly. The load at which masonry structures fail is known as the crushing strength.
- Tensile strength: A sample for this is tested in the testing machine. Tensile strength is measured to determine the capability of mortar against the tensile load over the structure.
- Adhesive strength: It is required for the determination of the joint strength of the masonry structure.
|Important GATE Notes|
|Work Done By A Force||Motion Under Gravity|
|Dynamic Resistance||Static Resistance|
|Ideal Diode||Bettis Theorem|
|Work Done By A Constant Force||Application Layer Protocols|
|Castiglianos Theorem||Portal Frames|