CE 60Instructor: Paulo Monteiro
Elastic Modulus of Concrete
• Introduction
• Testing
• Materials
• Poisson’s ratio
CE 60Instructor: Paulo Monteiro
Introduction
CE 60Instructor: Paulo Monteiro
Testing
Types of Elastic Modulus
ASTM Testing
CE 60Instructor: Paulo Monteiro
Materials
• Water-to-cement ratio
• Aggregate Type
• Aggregate Content
CE 60Instructor: Paulo Monteiro
Poisson’s ratio
CE 60Instructor: Paulo Monteiro
Design Code
• ACI-318• E = 33 w1.5 f 0.5
CE 60Instructor: Paulo Monteiro
Creep of Concrete
CE 60Instructor: Paulo Monteiro
Introduction
CE 60Instructor: Paulo Monteiro
Reason
CE 60Instructor: Paulo Monteiro
Importance
CE 60Instructor: Paulo Monteiro
Effect of Mix Proportions
• Water-to-cement ratio• Aggregate Type• Aggregate Content• Time and Humidity• Geometry• Temperature• Magnitude of the applied stress
CE 60Instructor: Paulo Monteiro
Effect of volume of aggregate
CE 60Instructor: Paulo Monteiro
Effect of thickness
CE 60Instructor: Paulo Monteiro
Effect of humidity
CE 60Instructor: Paulo Monteiro
Effect of Geometry
1
1.5
2
2.5
0 100 200 300 400 500
50 % RH
70 % RH
90 % RH
Cre
ep C
oeffi
cien
t,
R
H
Theoretical Thickness (mm)
CE 60Instructor: Paulo Monteiro
Concrete Creep
CE 60Instructor: Paulo Monteiro
Concrete Relaxation
CE 60Instructor: Paulo Monteiro
Summary
CE 60Instructor: Paulo Monteiro
Summary
CE 60Instructor: Paulo Monteiro
Summary