File:An investigation of hooped concrete columns (1914) (14754504736).jpg

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Identifier: investigationofh00thom (find matches)
Title: An investigation of hooped concrete columns
Year: 1914 (1910s)
Authors: Thomas, Howard Rice
Subjects: Columns, Concrete Theses
Publisher:
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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Text Appearing Before Image:
et - 8h. - 0 m. 7 day . 28 day. No. Neat:1:3 Neat • • : 1:3: 1 . 575:190 : 730 :335: 2 • 590:185 : 750 :2G5: 3 : 620:165 • 755 :295: 4 : 600:185 : 735 :280: 5 : 635: • • Ave. : 604:186 : 742 : 361: H Initial Set, - lh. -5m.Final Set - 5h. - 25m, » • 7 day . 28 day ! No. • • :Neat:1:3: Neat : 1:3 : 1 • 600:180: 705 :189: 2 : 595:190: 705 1 Cj yj KJ . 3 605:200: 675 :295: 4 • 590:205: 650 :275: 5 • 610: : 710 Ave. 60C:194: 689 :288: Sand.- The sand was a well graded one from the pitsnear Attica, Indiana, being screened thru a l/4-in. mesh screen. Stone.- A hard limestone from near Kankakee, orderedscreened to pass a 1-in. screen, was used. In the columns madeon and after Nov. 20th, 1913, (which includes practically allthe columns), the stone was of a new shipment received on thatdate. Steel.- The steel used as longitudinal reinforcingwas taken from the stock on hand. It had a yield point of 33,300lb. per sq. in. and an ultimate strength of 50,500 lb. per sq. in,
Text Appearing After Image:
8 Six 24-in. test pieces of each size cf the spiral wire were furnished by the manufacturers cf the spirals. The l/2-in.rods were tested in the 50,000-lb. Piehle machine and the 5/l6-in.and 3/l6-in. sizes were tested in the 10,000-lb. Olsen wire-test-ing machine. Elongation in 8-in,,reduction in area, and ulti-mate loads were determined for each specimen; measurements ofelongation over a 2-in. gage length were also made for each testby means of an extensometer designed by Professor H. F. Mooreof the University of Illinois. The results of these readingsgave smooth curves, which are shown on pages 40—4.3.It shouldbe noticed there is no break in these curves such as would indi-cate a definite yield point, nor was any drop cf beam noticedin testing. From appearances these test specimens were probablystraightened out after having been bent into spirals. Thisstraightening would probably in seme measure account for thelack of a definite yield point. of reinforcing does not fulfill the requ

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Author Thomas, Howard Rice
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Flickr tags
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  • bookid:investigationofh00thom
  • bookyear:1914
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Thomas__Howard_Rice
  • booksubject:Columns__Concrete
  • booksubject:Theses
  • bookcontributor:University_of_Illinois_Urbana_Champaign
  • booksponsor:University_of_Illinois_Urbana_Champaign
  • bookleafnumber:31
  • bookcollection:university_of_illinois_urbana-champaign
  • bookcollection:americana
Flickr posted date
InfoField
29 July 2014

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