Document Type
Thesis
Date of Award
5-31-1986
Degree Name
Master of Science in Civil Engineering - (M.S.)
Department
Civil and Environmental Engineering
First Advisor
C.T. Thomas Hsu
Second Advisor
John R. Schuring
Third Advisor
Walter Konon
Abstract
Fly ash and condensed silica fume are two main mineral pozzolanic admixtures in portland cement concrete. The increasing use of the fly ash in concrete projects and concrete products during the past 3O years and condensed silica fume in several projects during the past 1O years indicates a greater acceptance of them as the mineral pozzolanic admixtures in concrete. Although the engineers are of some identical views in using these industrial byproducts in concrete projects, there are different views on how the behavior and utilization of fly ash con-crete and condensed silica fume concrete since the byproducts are not the same source of chemical components. The previous research on the properties of fresh and hardened state of fly ash concrete and condensed silica fume concrete for structural applications are reviewed. Different mix proportioning design method of concrete with fly ash are discussed and, particularly, the overweight replacement method is presented. Examples of data from present laboratory investigations are given. This laboratory study emphasizes both the physical and chemical properties of the fly ash and condensed silica fume concretes. The results show that the fly ash concrete and the condensed silica fume concrete can exhibit a strong structural performance similar to that of normal concrete. It also shows that the fly ash concrete and the condensed silica fume concrete are able to provide some cost advantages, at the same time, they can produce much better structural members.
Recommended Citation
Chen, Ronghao, "Pozzolanic admixtures in concrete mix" (1986). Theses. 3191.
https://digitalcommons.njit.edu/theses/3191
