A sample of coarse aggregate is placed in a bucket of know volume (0.5 ft^3) and rodded with a tamping rod to determine its unit weight. The empty weight of the bucket is 20.3 lb. The weight of the bucket filled with dry aggregate was: Trial 1:   69.6 lb Trial 2:   68.2 lb Trial 3:   71.6 lb Trial 4:   70.8 lb Trial 5:   72.0 lb Based on the provided data determine the (i) average, standard deviation and coefficient of variance of the dry rodded unit weight; (ii) % voids of the aggregate sample if Gs = 2.620

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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A sample of coarse aggregate is placed in a bucket of know volume (0.5 ft^3) and rodded with a tamping rod to determine its unit weight. The empty weight of the bucket is 20.3 lb. The weight of the bucket filled with dry aggregate was:

Trial 1:   69.6 lb
Trial 2:   68.2 lb
Trial 3:   71.6 lb
Trial 4:   70.8 lb
Trial 5:   72.0 lb

Based on the provided data determine the (i) average, standard deviation and coefficient of variance of the dry rodded unit weight; (ii) % voids of the aggregate sample if Gs = 2.620

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