Document Type
Thesis
Date of Award
5-31-1987
Degree Name
Master of Science in Civil Engineering - (M.S.)
Department
Civil and Environmental Engineering
First Advisor
Methi Wecharatana
Second Advisor
Charles Franklin Peck
Third Advisor
John R. Schuring
Abstract
This investigation studied the modulus of rupture and energy of rupture of mortar, concrete, and steel fiber reinforced mortar at various rates of flexural straining. The strengths of the composites were varied by changing the water cement ratios. Single point flexural loading tests were conducted on 4" x 4" x 20" specimens using a weight dropped from a height of 30" to produce the dynamic loading. Strain rates were varied between 0.1 and 1.9 per second. The inertial effects of acceleration of the specimen were taken into account.
These tests produced data that demonstrated slightly greater ratios of dynamic to static modulus of rupture ratios than previous investigators had found. Dynamic energy absorption rate sensitivities generally agreed with most previously observed patterns. This is an increase in energy of rupture with strain rate. The exception are composites reinforced with undeformed steel fibers. These showed no definite rate sensitivity.
This study demonstrated the importance of accounting for all inertial effects that overshadow the perceived materials' response.
Recommended Citation
Roland, Edward, "Flexural behavior of portland cement based composites subjected to high strain rates" (1987). Theses. 3307.
https://digitalcommons.njit.edu/theses/3307
