Sprayed Concrete for Repair of Structures Sprayed concrete can be defined as mortar or concrete pneumatically projected into place’. Sprayed concrete is used widely in the repair of deteriorated structures, because of its ease of application in situations where it is virtually impossible to use formwork to recast, and because it can be applied in … Read more
Curing of Concrete Curing of Concrete is a method by which the concrete is protected against loss of moisture required for hydration and kept within the recommended temperature range. Curing will increase the strength and decrease the permeability of hardened concrete. Curing is also helps in mitigating thermal and plastic cracks, which can severely impact durability of structures. A curing practice involves keeping the concrete damp or moist until the hydration of concrete is … Read more
What is Bleeding in Concrete? Excessive displacement of water by solids in fresh concrete mixture, after the compaction process is called Bleeding in Concrete. Concrete in fresh state is a suspension of solids (aggregates and cement) in water, and after compaction there is a tendency for the solids to settle. This sedimentation displaces the water … Read more
Shear Connector A Shear connector is a steel projection provided on the top flange of steel composite bridge girders to provide necessary shear transfer between the steel girder and composite slab to enable composite action. The most widely used form of shear connector is the headed stud, or shear stud. Other forms of shear connector … Read more
What is Striking Formwork? The process of removal of formwork or shuttering in the process of casting concrete is known as striking. Once the concrete has achieved the initial recommended strength, to support the self-weight and any imposed loads, the shuttering is removed for further curing. Soffit forms are usually left in place for longer … Read more
Advantages & Benefits of Synthetic Fibres in Concrete Flooring & Plastering Applications Use fibres in concrete or concreting materials as an additive, dates back to Romans & Egyptians period. Romans included bits of horse hair in the construction of Roman Colosseum which was built in 80BC and the Egyptians used straw in their bricks for … Read more
Bleeding in Concrete – Definition, Negative Effects & Control Summary Use a more finely ground cement. Concretes made with high early strength (Type III) cement bleed less because the cement is ground finer than normal (Type I) cement. Use more cement. At the same water content, rich mixes bleed less than lean mixes. Use fly … Read more