The composition of high performance concrete (HPC) are almost same as those of Conventional Cement Concretes( CCC ). But, because of lower Water Cement Ratio, presence of Pozzolans and chemical admixtures etc., the HPCs usually have many features which distinguish them from CCCs. From practical considerations, in concrete constructions, apart from the final strength, the(…)
High Strength Concrete
ADVANTAGES OF HIGH PERFORMANCE CONCRETE
Advantages of High Performance Concrete (HPC) : The advantages of using high strength high performance concretes often balance the increase in material cost. The following are the major advantages that can be accomplished. 1.Reduction in member size, resulting in increase in plinth area/useable area and direct savings in the concrete volume saved. 2.Reduction in the(…)
MIX DESIGN OF HIGH STRENGTH CONCRETE
The properties of a high-strength concrete-mix with a compressive strength of more than 40 MPa is greatly influenced by the properties of aggregates in addition to that of the water-cement ratio. To achieve high strength, it is necessary to use lowest possible water-cement ratio, which invariably affects the workability of the mix and necessitates the(…)
CURING OF HIGH PERFORMANCE CONCRETE
Curing of High Strength Concrete High Performance Concrete has very low water-cement ratio and better particle distribution due to the use of mineral admixtures, which result in significantly less pore per unit volume of cementitious materials in the mixture than the CCC. Filling of the voids by hydration product in HPC is much faster than(…)
MIX FOR HIGH STRENGTH CONCRETE
Mix for High Strength Concrete In order to obtain high strength of concrete, three methods are available in general. The first is to increase the strength of the binder, the second is to select aggregate with high strength, and the third is to improve the bond at the interface of aggregate and binder. Among them(…)
MECHANISM OF HIGH PERFORMANCE CONCRETE
High strength and low permeability mechanism are logical development of presence of silica fume and superplasticisers in concrete the dual requirements of high strength and low permeability are linked to each other through the need to reduce the volume of relatively larger capillary pores. As pointed out earlier, this is achieved by low water-cement ratio(…)
ULTRA-HIGH PERFORMANCE CONCRETE (UHPC)
Ultra-High Performance Concrete (UHPC) is a solution developed to address some of the main design, service life and life cycle costing issues associated with the use of concrete. Ultra High Performance Fiber Reinforced Concrete is a steel fiber reinforced concrete consisting of an optimized gradation of fine powders and a very low water to cementitious(…)
Punching Shear Resistance of High-Strength Concrete Slabs
Concrete with strengths above 50 MPa is currently used due to an increasing requirement for higher strengths and improved long-term properties. HSC is being utilised in many projects. High-strength concrete members exhibit, in some instances, different failure mechanisms and simply extrapolating models and equations meant for normal strength to high-strength concrete may lead to unsafe(…)
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