Slope Stabilization & Tunnel Linings Using SFRC
Slope Stabilization using Steel Fibre Reinforced Concrete (SFRC ) SHOTCRETE & GUNITE : Shotcrete is an all-inclusive term to describe the spraying of concrete or mortar that may be accomplished through either a dry- or wet-mix process. Gunite refers only to the dry-mix process in which the dry cementitious mixture is blown through a hose to the nozzle, where the water is injected immediately prior to application. Both methods are compatible with Steel Fibre Reinforced Concrete technology. “Shotcreting” using steel fibres is being successfully employed in the construction of Domes, Ground Level Storage Tanks, Caverns, Tunnel Linings, Mines, Rock Slope Stabilization and repair and retrofitting of deteriorated ...
Roads & Pavements – Heavy Duty Tracks
Roads & Heavy Duty Tracks Using SFRC HISTORICAL PERSPECTIVE Sher Shah Suri is generally credited with being the Father of India’s inter-city National Highway System. It was he who, in the Sixteenth Century, build the original Grand Trunk Road, starting from near modern Peshawar and going all the way upto Bengal. It is quite interesting to note that India was one of the earliest countries in the world to start building concrete roads. India’s first concrete was built in Madras (Chennai) in 1914, in front of the office of its Municipal Corporation. This road remained pot-hole free for a very long time despite the heavy rains in the region. This made engineers intrested in the techonolgy to build hilly ...
Hardstandings & Floorings
Hardstandings : Floorings, Parking lots, Taxiways, Playgrounds etc. The use of Steel Fibre Reinforced Concrete (SFRC) for concrete floors has increased significantly in the last couple of decades. However, only a few engineers understand, evaluate and use them well. Engineers involved in a SFRC slab project should use the toughness value as a comparative parameter as well as a design parameter. Also the toughness value should be included in the specifications as well as the slab thickness, the dosage and the type of steel fibres that corresponds to it. The Cracking control of plain concrete slabs on soil foundation requires the execution of joints with mechanisms of load transfer between adjacent panels. These joints ...
Bridges & Overlays
Strength, durability and low cost of concrete structures can be achieved with SFRC. These structures are constructed without the use of conventional reinforcing steel bars. SFRC is ultra high-strength concrete with unique properties including high flexural and shear strength. It is also strong in compression, durable and has high impact resistance. Structures can be either precast or poured in place. A key feature of SFRC is the increased flexural strength with the use of lab-configured steel fibers that provide effective bonding. This high bond strength results in micro stitching of small cracks thus significantly limiting crack propagation under loading compared to conventional Reinforced Concrete with solid reinforcing ...