Estimation Of Rat-trap Bond

“Economical solutions to all brick masonry walls”

Masonry ??

“masonry means work done by masons”

Basic Terms in Masonry

Conventional Bonds Using in India

Flemish Bond English Bond

Proposed Bond

Why go for Rat-trap bond ?

1. Economical 2.Thermal Insulation

Why go for Rat-trap bond ?

3. Light weight 4. Earthquake resistance

Why go for Rat-trap bond ?

5. Sound proof 6. Fire resistance

Why go for Rat-trap bond ?

7. Environmental Friendly 8. Energy Saving

Estimation

1. Strength

S.No. Description Brick Strength () Initial Crack Ultimate

Load (kN) Stress () Load (kN) Stress ()

1. Rat-trap Bond 5.6914 204 1.166 252 1.642

2. Conventional Bond 5.6914 208 1.152 285 1.698

2. Material Saving ( for 1)

S.No. Description Bricks Quantity of Sand (for 1:6 mix) Quantity of Cement (for 1:6 mix)

1 Rat-trap Bond 84 0.0295 0.142 bags

2 Conventional Bond 100 0.0641 0.308 bags

• 16% of bricks are less used.• 54% of sand is less used.• 57% of cement is less used.

We are still working on the model…