What is compaction ratio of concrete?

Answer 1

• The Compacting Factor = Weight of partially compacted concrete/Weight of fully compacted concrete.
• The weight of fully compacted concrete can also be calculated by knowing the proportion of materials, their respective specific gravities, and the volume of the cylinder.
  
• It is seen from experience, that it makes very little difference in compacting factor value, whether the weight of fully compacted concrete is calculated theoretically or found out actually after100 per cent compaction.

Answer 2

The term "compaction ratio" is not a standard or widely recognized term in the context of concrete. However, compaction is an essential process in concrete construction that involves reducing the volume of freshly mixed concrete by eliminating voids and air pockets.

If you are referring to the compaction of concrete, it is typically expressed as the "compaction factor" or "slump." These are measures of the consistency or workability of the concrete and are determined through standardized tests.

1. **Compaction Factor:**

   • Compaction factor is a measure of the workability of concrete. It is the ratio of the weight of partially compacted concrete to the weight of the same concrete fully compacted under the same conditions. A higher compaction factor indicates lower workability.

2. **Slump:**

   • Slump is another test used to measure the consistency of concrete. It is the vertical displacement of the center of a flow cone or the cone-shaped pile of concrete after a standard slump cone is removed. Slump is usually expressed in inches or millimeters.

Both compaction factor and slump are crucial for ensuring that concrete is workable and can be properly placed, compacted, and finished on the construction site. The specific requirements for compaction factor or slump will depend on the type of construction and the transportation and placement methods used for the concrete.