Unit Weight of Coarse Aggregate Standard procedures for determining the unit wei
ID: 1845193 • Letter: U
Question
Unit Weight of Coarse Aggregate Standard procedures for determining the unit weight of an aggregate are given in ASTM C29. A summary of the procedures is as follows: - Obtain unit weight bucket and record empty weight. - Fill the unit weight bucket 1/3 full with dried aggregate and level the surface with your fingers. - Rod the layer 25 times evenly over the surface. - Fill the bucket 2/3 full and rod the layer 25 times, penetrating only slightly into the lower layer. - Fill the bucket to slightly overflowing. Level the surface with your fingers so the projections of aggregate particles above the top of the measure approximately balance the voids in the surface below the top of the measure. - Record the mass of the container filled with aggregate.Explanation / Answer
this test is conducted for evaluating the unit weight of coarse aggregate.
1. Unit weight of aggregate is required in calculating the weight of total concrete mixture.
2. with this bulk density of material can be evaluated.
3. Also used for mass/volume relationships for conversions in purchase agreements
4. Also used annually for inventory control and verification
5. if bulk density is calculated. with the value of bulk density moisture content can also be evaluted.
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