Structure Repair with Advance Cast in Place Concrete Types Cast-In-Place Fiber-Reinforced Concrete When metallic or polymeric fibers (made up of steel, glass or synthetic and natural plastics) are added in conventional concrete to get greater resistance to plastic shrinkage, drying shrinkage, and cracking, the resulting material is called fiber-reinforced concrete. Fiber-reinforced concrete is placed(…)
Concrete Technology
Concrete Technology provides information on concrete and its properties, mix design, cracking, durability, high strength, prestressed concrete, precast concrete, fresh concrete ,hard concrete, Ready mix, SCC, special types of concrete, sulphate attack etc.
STRUCTURAL USES OF PRECAST CONCRETE
Precast concrete is used extensively in building structures, for e.g. structural frames, floors and roofs, claddings etc. Use of Precast Concrete in frames: There are two main types of precast building frame. The structural frame consists of slabs, beams and columns. Structural frames are mainly used for offices, car parks and retail developments. The cross-wall(…)
SELF COMPACTING CONCRETE MIX DESIGN REQUIREMENTS
MIX DESIGN OF SELF COMPACTING CONCRETE (SCC) Self Compacting Concrete has to be designed and tested before it is produced and used for construction. During SCC evaluation, the local materials and equipments have to be tested to find out the right concrete mix proportions and mixing times suitable for the element to be cast. Various(…)
CONCRETE CHEMICALS AND APPLICATIONS
Concrete Chemicals (Admixtures) and Applications Admixtures are materials other than cement, aggregate and water that are added to concrete either before or during its mixing to alter its properties, such as workability, curing temperature range, set time or color. Some admixtures have been in use for a very long time in concrete construction, such as(…)
TYPES OF CRACKS IN REINFORCED CONCRETE SLABS
TYPES OF CRACKS IN REINFORCED CONCRETE SLABS 1. Cracks in reinforced concrete columns due to Steel Corrosion (cracks parallel to steel bars) 2. Cracks in reinforced concrete columns due to shrinkage of concrete 3. Cracks in reinforced concrete columns due to increased load on the slab 4. Cracks in reinforced concrete columns due to sulphate(…)
FIBRE REINFORCED CONCRETE IN PAVEMENTS
Fibre reinforced concrete (FRC) is defined as a composite material consisting of concrete reinforced with discrete randomly but uniformly dispersed short length fibres. The fibres can be made of steel, polymer or natural materials. Woven fabrics, long wires, bars, and continuous wire mesh are not considered discrete fibres. FRC is considered as a material of(…)
PUMPED CONCRETE PUMP TYPES & SELECTION
Pumped concrete is the concrete which is transported to heights by means of pumping using concrete pumps. This method is used where large quantity of concrete work is involved at greater height, where other means of transporting is not easy to do. Concrete pumps have been known for more than 50 years. In modern times,(…)
APPLICATIONS OF STEEL FIBER REINFORCED CONCRETE
APPLICATION OF STEEL FIBER REINFORCED CONCRETE STEEL FIBER FOR PRE-CAST CONCRETE APPLICATION: Manholes, Risers, Burial Vaults, Septic Tanks, Curbs, Pipes, Covers, Sleepers APPLICATIONS IN OTHER STRUCTURES: A) Highway And Airfield Pavements: Repair of existing pavement. Reduction in pavement thickness. Increase in resistance to impact. Increase in transverse and longitudinal joint spacing Smooth riding surface. B)(…)