Which of the following are durability issues related to concrete?

A) corrosion, freeze-thaw, sulfates, alkali silica reaction (ASR)

B) stress and strain

C) CSH, CH, ettringite, Afm

D) C3S, C2S, C3A, C4AF

E) compressive strength, flexural strength, modulus of elasticity What is the estimated average compressive strength (psi) based on the mix design procedure outlined in ACI 211?

Cement: 650 lbs.

#67 Limestone: 1820 lbs.

Manufactured Sand: 1275 lbs.

Water: 286 lbs.

Design Air Content: 5 %

A) 5,000 psi

B) 3,500 psi

C) 4,500 psi

D) 3,000 psi

E) 4,000 psi

Compressive Strgth W/C (by mass)

at 28 days Non-Air Air Entrained

7,000 psi 0.33 ---

6,000 psi 0.41 0.32

5,000 psi 0.48 0.40

4,000 psi 0.57 0.48

3,000 psi 0.68 0.59

2,000 psi 0.82 0.74 2nd Edition•ISBN: 9781439047910 (9 more)Lawrence S. Brown, Thomas A. Holme945 solutions

3rd Edition•ISBN: 9780471254249 (1 more)Octave Levenspiel228 solutions

10th Edition•ISBN: 9780470458365 (8 more)Erwin Kreyszig4,134 solutions

1st Edition•ISBN: 9781118414705David Besanko, Mark Shanley, Scott Schaefer215 solutions