Government Engineering College, Bhavnagar Civil Engineering Third Sem Government Engineering College, Bhavnagar Civil Engineering Third Sem. Subject : Building Construction Topic : Brick Masonary Enrollment No.: Name: 130210106016 130210106024 130210106062 130210106042 130210106005 140213106012 Gamit Tarun T. Jadav Bhavesh B. Vala Akshit Patel Yash H. Bariya Raunak J. Solanki ketan c.

Contents Introduction Technical terms Tools used Types Bond Joints Advantages Defects

Introduction Masonry:- Construction of building units bonded together with mortar. Brick masonry:- Construction of brick units bonded together with mortar. When bricks are laid in mortar in a proper systematic manner, they form a homogeneous mass, which can withstand forces without disintegration. This mass of the structure, so made by the use of bricks is called "Brick Masonry" or simply "Brick work".

Technical terms used in brick masonry 1. Header :- Brick which is laid with its length perpendicular to the face of the wall. 2. Stretcher:- Full brick which is laid with its length parallel to the face of the wall. 3. Course:- Horizontal layer of brick. 4. Header course:- Course of brick work fully composed of header 5. Stretcher course:- Course of brick work fully composed of stretchers.

Header Row lock Stretcher Soldier

Types of Bricks 1. Closer 2. King closer 3. Queen closer 4. Half Bat 5. Bevelled closer

Tools Used in Brick masonary Trowel Plumb bob Hammer Spirit level Mason square Steel tape

Types of brick masonry Brick work in mud. The mud is used to fill up the joints Thickness of the mortar joint is 12 mm. Cheapest. Maximum height of wall is 4 m.

2. Brick work in cement I class II class III class Cement or lime mortar is used. The surfaces and edges of bricks are sharp. The thickness of mortar joints doesn’t exceed 10 mm. II class Ground moulded bricks are used . Bricks are rough and shape is slightly irregular. The thickness of mortar joint is 12 mm. III class Bricks are not hard , rough surface with distorted shape. Used for temporary structures. Used in places where rainfall is not heavy.

Types of Bonds English Double Flemish Single Flemish Heading Stretching Rat trap bond Garden Wall

1. English Bond It consists of alternate courses of headers and stretchers . Considered as strongest bond in brick work For breaking vertical joints queen closer is placed after first header.

2. Flemish Bond Each course consists alternate headers and stretchers. Not as strong as English bond. Alternate course starts with a header at the corner. For breaking of vertical joints , closers are inserted in alternate courses next to the quoin header.

3. Heading Bond Heading or Header Bond is laid on headers. Used for round quick sweeps, as in Figure. Should never be used in straight work, as it is very weak

4. Stretching Bond Bricks are laid in stretchers, as in the figure below. Used in walls of half-brick in thickness. Due to its constant occurrence in the last position it is also called Chimney Bond.

5. Garden wall Bond Used for 9 inch walls. Used when a fair face is required on both sides. Wall is composed of three or four courses of stretchers alternating with one of headers, as in the figure below.

6. Rat trap Bond Alternate course of stretchers and headers. It is made by placing the bricks on their sides having a cavity of 4″ (100 mm) Alternate course of stretchers and headers. It is still used in India as an economical bond.

JOINTS IN BRICK MASONRY Weathered Joint: Mortar joint has sloped (downwards) edge. Concave joint: Joint concave inwards. Vee joint: mortar joint is in the form of a V. Flush Joint: Mortar joint is flush with the brick surfaces. Raked Joint: A large portion of the mortar joint is raked out - Not a safe, impermeable joint. Struck Joint: Mortar joint has a sloped (upwards) edge.

Masonry Joints Weathered Concave Vee Flush Racked Struck

Advantages of brick masonry The brick masonry is cheaper as compared to stone masonry. Bonding strength is very good. In brick work , the mortar joints are thin and hence the structure becomes more durable. No complicated lifting devices are necessary in brick work. Brick work can be done by the less skilled labours also. In Brick work good quality of bricks posses good fire resistance. Due to regular size of bricks they are easy to handle.

Defects in brick masonry Sulphate attack Sulphate salts present in bricks work react with alumina content of cement . It occur in boundary walls Crystallization of salts from bricks Occur in masonry made out of brick which contain excessive soluble salts This phenomenon is also known as efflorescence. Corrosion of embedded iron or steel Iron or steel embedded in brick work gets corroded in the presence of dampness On corrosion the metal expands in volume and tends to crack the brick work.

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