Structural Concrete - Hassoun

80 Chapter 2 Properties of Reinforced Concrete
13. D. E. Branson and M. L. Christiason. “Time-Dependent Concrete Properties Related to Design—Strength
and Elastic Properties, Creep, and Shrinkage.” In Designing for Effects of Creep, Shrinkage, and Temperature
in Concrete Structures. ACI SP-27. American Concrete Institute, Dearborn, MI, 1971, pp. 257–277.
14. Z. P. Bazant and S. Baweja. “Creep and Shrinkage Prediction Model for Analysis and Design of Concrete
Structures: Model B3.” In The Adam Neville Symposium: Creep and Shrinkage—Structural Design
Effects. ACI SP-194. American Concrete Institute, Dearborn, MI, 2000, pp. 1–100.
15. N. J. Gardner. “Comparison of Prediction Provisions for Drying Shrinkage and Creep of Normal Strength.”
Canadian Journal of Civil Engineers 31 (2004): 767–775.
16. H. S. Muller and H. K. Hillsdorf. CEB Bulletin d’Information, No. 199, Evaluation of the Time Dependent
Behavior of Concrete, Summary Report on the Work of General Task Group 9, September 1990.
17. H. S. Mülleer, C. H. Küttner, and V. Kvitsel. “Creep and Shrinkage Models of Normal and
High-Performance Concrete—Concept for a Unified Code-Type Approach.” Revue Française de
Genie Civil, Special issue, Herms, Paris, 1999.
18. Special Activity Group 5, “Model Code 2010-Final Draft,” fib Bulletin 1, no. 65, 2012.
19. American Association of State and Highway Transportation officials (AASHTO). LRFD Bridge Design
Specifications, 7th ed. AASHTO, Washington, DC, 2014.
20. E. J. Callan. “Concrete for Radiation Shielding.” ACI Journal 50 (1954).
21. J. Faber and F. Mead. Reinforced Concrete. Spon, London, 1967.
22. A. E. Newman and H. W. Reinhardt. “High Performance Fiber Reinforced Cement Composites.” In Proceedings,
vol. 2. University of Michigan, Ann Arbor, June 1995.
23. ACI Committee. State-of-the-Art Report on Fiber Reinforced Concrete. 544 Report. American Concrete
Institute, Dearborn, MI, 1994.
24. D. P. Gustafson. “Raising the Grade,” Concrete International, ACI, April 2010, pp. 59–62.
PROBLEMS
2.1 Explain the modulus of elasticity of concrete in compression and the shear modulus.
2.2 Determine the modulus of elasticity of concrete by the ACI formula for a concrete cylinder that has a
unit weight of 120 pcf (1920 kg/m 3 ) and a compressive strength of 3000 psi (21 MPa).
2.3 Estimate the modulus of elasticity and the shear modulus of a concrete specimen with a dry density of
150 pcf (2400 kg/m 3 ) and compressive strength of 4500 psi (31 MPa) using Poisson’s ratio, μ = 0.18.
2.4 What is meant by the modular ratio and Poisson’s ratio? Give approximate values for concrete.
2.5 What factors influence the shrinkage of concrete?
2.6 What factors influence the creep of concrete?
2.7 What are the types and grades of the steel reinforcement used in reinforced concrete?
2.8 On the stress–strain diagram of a steel bar, show and explain the following: proportional limit, yield
stress, ultimate stress, yield strain, and modulus of elasticity.
2.9 Calculate the modulus of elasticity of concrete, E c , for the following types of concrete:
E c = 33w 1.5√ f ′ c (ft)
= 0.043w 1.5√ f ′ c (SI)
Density Strength f ′ c
160 pcf 5000 psi
145 pcf 4000 psi
125 pcf 2500 psi
2400 kg/m 3 35 MPa
2300 kg/m 3 30 MPa
2100 kg/m 3 25 MPa