Reinforced Brick Work
Brickwork strengthened by the introduction of mild steel flats, hoop iron, expanded mesh or bars is termed as reinforced brickwork, sometimes also called reinforced brick masonry. Reinforced brick masonry (RBM) or reinforced brick work (RBW) consists of brick masonry incorporating steel reinforcement embedded in mortar. This masonry greatly increases resistance to forces that produce tensile and shear stresses. The reinforcement provides additional tensile strength, allowing better use of brick masonry\’s inherent compressive strength. The two materials complement each other, resulting in an excellent structural material. The principles of reinforced brick masonry design are the same as those commonly accepted for reinforced concrete, and similar formulae are used.
History of RBW
The reinforcement of masonry is not a new concept. In the 18th Century, external iron straps were commonly used in stonework. It was not until 1825 that the first use of reinforced brickwork was recorded. Sir Marc Brunel used the technique in the construction of two caissons, one either side of the River Thames for the Wapping – Rotherhithe Tunnel.
Materials used in RBW
REINFORCING MATERIAL
• STEEL FLATS
• HOOP IRON
• MESH OR BAR
Galvanised steel is likely to be used in locations of low corrosion hazard. Stainless steel is preferred in maritime or polluted environments.
Basic construction procedures
The earliest method of placing reinforcement into brick masonry was simply to place iron or steel bars in mortar joints as the bricks were laid. Later the reinforcement was placed in collar joints between two masonry and surrounded by mortar or fine grout.
Applications
• In those countries where labour costs are low, one of its principal uses has been for the construction of floor and roof slabs.
• Most extensively used in the construction of vertical members, such as walls and columns.
• Light structural members can be constructed at substantially less cost in reinforced brick masonry than in reinforced concrete.
• Reinforced brick beams and lintels allow the designer to achieve exposed brick on the underside of these elements.
• The applications range from retaining walls to exterior cladding.
• The added tensile strength of the reinforcing steel opens the possibility for prefabricated brick panels.
• RBM construction has been adapted to a wide variety as Beams, column, pilasters, arches, etc.
