The organic prestressing system is a concept taken as an inspiration from the behavior of an organic structure (biomimetic or the nature formed structures) that is derived from nature, called the muscle. This resemble an active control system of prestressing. ...
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Precast Concrete Walls – Connections and Structural Actions
The precast concrete walls gain higher in-plane stiffness providing higher stability for the precast buildings. Connections and structural actions of precast walls are discussed.
Antifreeze Admixtures for Concrete during Cold Weather Concreting
Freezing reduces strength of concrete by 20 to 40 % when fresh concrete is subjected to freezing. Antifreeze admixtures of concrete, its properties and uses in cold weather concreting are discussed. The resistance of the fresh concrete against the freeze ...
Measurement of Air Content in Concrete by Pressure Air Method
Measurement of Air Content in Concrete Air content of concrete is measured by the pressure air measurement method which is based on the principles of The Boyle’s law. The Boyle’s law states that the volume of the gas is inversely ...
Selection of Superplasticizers for High-Performance Concrete
Superplasticizers are used to fluidify the concrete in the field. Most of the superplasticizers helped to maintain high slump values for a time of 30 to 45 minutes. But some of the Portland cement do no behave well with the ...
Types of Shrinkages in Concrete and its Preventions
Shrinkage is an inherent property of concrete. The shrinkage in concrete can be defined as the volume changes observed in concrete due to the loss of moisture at different stages due to different reasons.
Different Types of Concrete Mixer or Concrete Mixing Machines
A concrete mixer mixes cement, aggregates and water and produce concrete mechanically. There are various types of concrete mixers available which makes concrete production economical.
What Factors Causes Failure of Concrete Structures?
Different factors cause failure of concrete structure such as errors from design to construction to occupancy. Main causes of failure of concrete structures are discussed.