Aggregates can be classified in many ways. Classification of aggregates based on shape and size such as coarse and fine aggregates are discussed here,
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CAUSES OF CONCRETE DAMAGE IN STRUCTURES
Damage to structural concrete can be due to the use of excessive water, poor cement, poor construction practices, improper mixture proportioning, dirty or low quality aggregate, and inadequate curing.
Recycling of Waste Concrete
Recycling of waste concrete is done to reuse the concrete rubble as aggregates in concrete. The recycled concrete aggregates have less crushing strength, impact resistance, specific gravity and has more absorption value as compared to fresh aggregates.
How does Aggregate Properties Affect Concrete?
Coarse aggregates have properties such as size, shape, moisture contents, specific gravity, density etc. which affects concrete strength and durability in many ways. These effect of aggregate properties on concrete are discussed in detail. Concrete is a mixture of cementitious ...
Testing of Sand Quality at Construction Site for Concrete
There are different methods for testing of sand quality at construction site for concrete construction. Quality of sand is as much of importance as other materials for concrete. Aggregate most of which pass through 4.75 mm IS sieve is known as ...
Stripping Value Test On Road Aggregates
What is Stripping Value Test? The stripping value of aggregates is determined as the ratio of the uncovered area observed visually to the total area of aggregates, expressed as a percentage. Bitumen and tar adhere well to all normal types ...
Elongation Index Test on Coarse Aggreagtes
Elongation index of an aggregate is the percentage by weight of particles whose greatest dimension (length) is greater than one and four-fifth times (1.8 times or 9/5 times) their mean dimension. It is measured on particles passing through mesh size ...
Requirements of Concrete Admixtures for use in Construction
Admixture is a material that is used as an ingredient for the preparation of concrete, and is added to the batch immediately prior to or during mixing materials (ACI 212.R-10). The purpose of blending admixtures is to improve fresh or ...