Vacuum concrete is the one from which water is removed by vacuum pressure after placement of concrete structural member. Vacuum concrete has high strength and durability than normal concrete. Water-cement ratio is detrimental for concrete. We always try to restrict ...
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Typical Construction Joints Details and Location for Beams and Columns
Construction joints in RCC beams and columns are required when concreting has to be stopped for the day or more than 30 minutes to maintain bond strength.
STAGES OF FRACTURE (CRACKING) IN CONCRETE
The stages of cracking (fracture) in concrete: There are three stages of cracking or fracture in concrete. When we describe the cracking mechanisms, it is important to differentiate between the mode of crack initiation and how this occurs at the ...
STEEL CONCRETE COMPOSITE BEAMS
Steel concrete composite beams consists of a steel beam over which a reinforced concrete slab is cast with shear connectors. In conventional composite construction, concrete slabs are simply rested over steel beams and supported by them. These two components act ...
Retrofitting of RCC Structural Members, Types, Selection, and Procedures
Retrofitting of RCC structural members is carried out to regain the strength of deteriorated structural concrete elements and to prevent further distress in concrete. Strength deficiency of concrete structural members can be due to poor workmanship, design errors, and deterioration ...
Effect of Air Entrainment on Concrete Strength
Air entrainment affects compressive strength of concrete and its workability. It increases the workability of concrete without much increase in water-cement ratio. Compressive strength of concrete is inversely proportional to workability of concrete. When workability of concrete increases, its compressive ...
PROPERTIES OF REACTIVE POWDER CONCRETE
Properties of RPC: The mixture design of Reactive Powder Concrete primarily involves the creation of a dense granular skeleton. Optimization of the granular mixture can be achieved by the use of packing models. Property of RPC Description Recommended value Type ...
ADVERSE EFFECT OF CONCRETE ADMIXTURE
Adverse effects due to improper application : Admixtures are used extensively to produce high workable, high strength high performance and highly durable concrete with minimum cost. However, these admixtures are not used judiciously and with the poor knowledge of admixture ...