Title:
Bond Behavior and Petrography of Ultra-High-Performance Concrete
Author(s):
Weldon
Publication:
Web Session
Volume:
ws_S24_Weldon.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
3/23/2024
Abstract:
The typical commercial production of ultra-high-performance concrete (UHPC) has a high cost. There is a need for cost-effective solutions in the manufacturing processes and design solutions that minimize its usage. The scope of this project includes the development of a nonproprietary UHPC mixture and testing the bond strength between a UHPC overlay and a normal strength concrete substrate. Various curing methods were considered to optimize the hardened properties of UHPC. Curing methods included a simulated steam room, submerging the hardened UHPC in heated water, wet burlap, and plastic coverings. Applying the optimal mix design and curing method, the bond strength between the UHPC and a normal strength concrete is investigated using a push-off shear test. Multiple roughening techniques were employed to achieve varying surface roughness values based on the ICRI surface profile chips. Moreover, petrographic analysis will be used in characterizing the different mixtures used throughout the project. The characteristics investigated include the minerology of the aggregate, the particle size distribution and the packing density of the aggregate. Those characteristics will then be compared to commercially available UHPC mixtures.