Date of Award
Fall 1994
Document Type
Thesis - Restricted
Degree Name
Master of Science (MS)
Department
Civil and Environmental Engineering
First Advisor
Wenzel, Thomas H.
Second Advisor
Faherty, Keith F.
Third Advisor
Vinnakota, Sriramulu
Abstract
The effect of elevated temperatures in which high strength fly ash concrete is mixed and cured shall be examined in this thesis. An experimental study was conducted to determine the strength development of high strength concrete (HSC) with and without fly ash when subjected to different hot weather mixing and curing regimes. Adverse curing conditions affect the structural behavior of concrete members. Concrete operations are carried out in all types of weather and in varying degrees of temperature. Although the ACI Committee 305 Hot Weather Concreting Report suggests guidelines for these situations, many projects are completed with inadequate compliance. Information was sought on the influence of temperature during mixing, placing and curing on the uniaxial compressive strength development of HSC with fly ash. Also, modulus of elasticity was investigated in this study. Parameters in the study include the fly ash replacement level and curing environment. A consistent range in the relative humidity (RH.) was maintained in the curing environments, and these ranges are referred to by the average relative humidity in the given range. Variables in the study include four fly ash replacement levels ( 0%, 20%, 40%, and 60%) and four mixing and curing environments (73"F-100%R.H., 73"F-44%R.H., 90°F-52%R.H., and 105°F-31 %R.H.). Using data from the study, strength development curves are drawn and the general stress-strain behavior determined. These results are compared with the results of specimens cured under standard laboratory conditions according to ASTM C 192-90a specifications. Conclusions are made concerning the effect of mixing and curing temperature on the strength development of high strength concrete with and without fly ash. The specific effect that the fly ash replacement level contributes to the strength development is discussed as well.
Recommended Citation
Browne, Terence M., "The Effects of Elevated Temperatures on the Strength Development of High Strength Concrete with Fly Ash" (1994). Master's Theses (1922-2009) Access restricted to Marquette Campus. 3974.
https://epublications.marquette.edu/theses/3974