Title:
Heavily Reinforced Shearwalls and Mass Foundations Built with “Green” Concrete
Author(s):
Dushyant Manmohan and P. Kumar Mehta
Publication:
Concrete International
Volume:
24
Issue:
8
Appears on pages(s):
64-70
Keywords:
DOI:
Date:
8/1/2002
Abstract:
The seismic retrofit of Barker Hall, a six-story, 40-year-old concrete building on the University of California Campus in Berkeley, required the construction of a concrete belt foundation, with bonded post-tensioned (PT) tendons at the top and bottom. The belt foundation supports the new exterior shearwalls and collector beams that strengthen the structure. The shearwalls are heavily reinforced and serve as the exposed facade of the building. With a strong commitment to promote “green” concrete for building construction, the structural designer mandated the use of high-volume fly ash (HVFA) concrete, which requires at least 50% cement replacement with fly ash by mass. This article contains a description of the materials, mixture proportions, construction practice, and properties of the HVFA concrete used for Barker Hall’s foundation and shearwalls.