The presence of excessive water in a concrete mix although may facilitate the easy placement of concrete but it also lowers the quality of the overall product. The damage to concrete structures due to excessive water in a concrete mix ...
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Crushed Concrete Aggregates – Properties and Uses of Recycled Aggregates
Crushed concrete aggregates also called as recycled concrete aggregates are fragments and pieces of concrete buildings which are demolished or rebuild. These crushed concrete are cleaned from dirt and broken to smaller pieces to manufacture aggregate which is termed as ...
What Factors Affects Air Content of Concrete?
Generally, concrete is required to be air entrained event if it is not exposed to freezing and thawing due to important benefits that concrete enjoys in other ways such as improving concrete workability. Concrete air entrainment is not an easy ...
What is the Basis for Selection of Concrete Mix Proportions?
The decision on selecting concrete mixture proportion is the process of optimizing number of favored properties based on the requirements of the project. In the following sections, the basis for selection of concrete mixture proportions will be discussed. Basis for ...
Concrete Discharge Time Requirements and Consequences of Exceeding Time Limit
Concrete discharge time requirements ensures that hardened concrete would meet requirements set at design stage. It is the time available for placement of concrete in formworks after it has been mixed. When water is added to dry mixture, chemical reactions ...
Methods of Pouring Concrete as per Recommendations of ACI 304R-00
Concrete pouring is a crucial process which not only needs properly qualified persons but also considerable focus and concentrations. Almost all codes have established certain specifications to ensure proper concrete pouring and prevent its segregation. In this article, correct concrete ...
Practical Methods of Providing Concrete Cover to Reinforcement
The concrete cover thickness is a major protection measure that prevents corrosion and deterioration of reinforcement steel bars. There are number of approaches that have been used to make sure that the exact required cover thickness is obtained during construction. ...
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 ...