QUESTION 14 An article in the ACI Materials Journal (Vol. 84, 1987, pp. 213-216) describes several experiments investiga

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Question 14 An Article In The Aci Materials Journal Vol 84 1987 Pp 213 216 Describes Several Experiments Investiga 1 (19.19 KiB) Viewed 142 times

QUESTION 14 An article in the ACI Materials Journal (Vol. 84, 1987, pp. 213-216) describes several experiments investigating the rodding of concrete to remove trapped air. A 3-inch x 6-inch cylinder was used, and the number of times this rod was used is the design variable. The resulting compressive strength of the concrete specimen is the response. The data are shown in the following table. Compressive Strength (psi) Rodding Level Observations 10 1530 1530 1440 15 1610 650 1500 20 1560 1730 1530 25 1500 1490 1510