Quiz 1 with Answers - Composition and Properties of Concrete | CME 300, Quizzes of Civil Engineering

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DEPARTMENT OF CIVIL AND MATERIALS ENGINEERING ***THE UNIVERSITY OF ILLINOIS AT CHICAGO*** November 11, 2014 Pop Quiz Department and Course No.: CME 300 Instructor: Dr. Issa Student Name: CLOSED BOOK AND NOTES Part I. A normal-weight concrete specimen tested at 28 days yielded the following results. 1. A6inx 12 in concrete cylinder failed at an axial compressive force of 105,000 Ibf. The ultimate compressive strength is most nearly (a) 1200 psi (b) 1900 psi (PL fog ibP © 3700 bai te A 2 te 70 -— [3 i132 sé | (d) 17,500 psi 7m Ci fe 2. A 6inx 12 in concrete cylinder resisted a transverse force of 45,000 Ibf in a split tensile cylinder test. The concrete tensile strength is most nearly @) 400 psi (b) 450 psi p 2 p 2 46 Ue (c) 625 psi gp- AF = ¥ ooD SS } d) 666 psi P =|397-9 ps: (a) 666 p: TLD Rays 397-4 p ] 3. A 6 in square unreinforced beam section resisted a force of 5400 lbf on 18 in span length. A one-third point loading test was used, and the fracture occurred within the middle third, The modulus of rupture is most nearly @ 45055 A= Mc. £ = S40 _[y60 psil (c) 525 psi AQ (d) 900 psi Me PL eo o2 3" T= 66? 2 4, Given a compressive strength of 3700 psi, the approximate value of the modulus of rupture ts most nearly @ 460 psi i , (b) 500 psi ACT Equation (c) 550 psi wae Lag sdZ? edad =[156.2 psi