Designing Concrete For Weight of 271 Pounds Per Cubic Foot


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Title: Designing Concrete For Weight of 271 Pounds Per Cubic Foot

Author(s): C. C. Keyser

Publication: Journal Proceedings

Volume: 28

Issue: 4

Appears on pages(s): 525-529

Keywords: none

Date: 4/1/1932

For the construction of the counterweights of the bascule span of the Arlington Memorial Bridge, Washington, D.C., it was necessary to design a concrete having a weight of 271 lb per cu ft, not less than 6 bags of cement per cu yd and a compressive strength of at least 2000 psi. Tests indicated that Swedish iron ore combined with steel punchings gave the most satisfactory and economical heavy aggregate. The tests indicated. that from a knowledge of the specific gravity of Ingredients used it is possible to compute the weight of fresh concrete to within about I percent.