The code requirements represent a major milestone in the industry—not only is it the first material-specific set of requirements for repair materials, but it also serves as ACI’s first code specifically for repairing reinforced concrete.
Use of Fiber-Reinforced Concrete in construction will allow for the use of less and simpler steel reinforcement while maintaining good structural behavior and potentially reducing the amount of post-earthquake repair. Such results will lead to a cheaper way to construct safe buildings with reduced life-cycle costs for the owner.
This paper describes an examination of the development of tension lap splices in high strength concrete and the applicability of the restriction in the ACI 318 code where the values of √fc’ used to calculate development length shall not exceed 100 psi.
Fire causes extensive financial losses due to property damage, as well as endangers the life and well-being of occupants. This new study throws light on the behavior of reinforced concrete members subjected to fire.
Repair of damaged bridge columns following an earthquake is a good alternative to replacement. New repair method shows benefits include cost savings, reduction in construction time, and decreased interruption of emergency services.
Student teams from around the world competed in the recent ACI Fiber-Reinforced Concrete Bowling Ball Competition. During this event, students were challenged to design and construct a fiber-reinforced concrete bowling ball that achieves optimal performance for specified tests and tasks, and document and present the team’s work to an audience of industry professionals.
New concrete pavement repair research shows that using nanomaterials can improve long-term performance and durability, and reduce life-cycle costs.
Research shows that utilizing recycled rubber derived from scrap vehicle tires can significantly contribute to the development of semi-lightweight and lightweight concrete.
University of Auckland researchers test frame components from a 20-story building damaged during the 2010-2011 Canterbury earthquakes to help engineers improve earthquake design and assessment guidelines
An innovative precast concrete (PC) T-wall panel system was developed to enhance constructability and lateral load resistance of fast-track, low-rise buildings.
This study shows that slenderness has an important influence on the punching strength of slabs with shear reinforcement, despite the fact that it is neglected in many codes of practice.
New concrete research indicates that critical crack does not develop until after the specified service load has been surpassed, suggesting that current pipe designs are overly conservative.
The ACI Excellence in Concrete Construction Awards provides a platform to recognize concrete projects at the forefront of innovation and technology, and showcases these projects to inspire excellence in concrete design and construction around the world.
Due to the environmental effects of natural sand mining, the regulations discourage the use of natural sand for concrete manufacture. Research shows using crushed sand in self-consolidating concrete is a viable alternative.
Research on reinforced Engineered Cementitious Composites shows that they can improve infrastructure sustainability by reducing the amount of repair and maintenance needed during the service life.
Recently, the first full-scale experiments on recycled concrete structures were made and one of the tests was rather ambitious: the structures were subjected to horizontal forces until they collapsed in order to evaluate their seismic capacity.
The American Concrete Institute (ACI) announced the winners of the 2015 Excellence in Concrete Construction Awards, who were honored during the ACI Awards Gala at the Concrete Convention & Exposition, November 9, 2015 in Denver, CO.
Long-term durability is a major issue for today’s infrastructure. In order to create concrete bridges with longer service lives and better performance, we must better understand the long-term behavior of these members.
Farmington Hills, MI - Every day we are impacted by recycled materials. We dry our hands with recycled paper towels, drink our coffee from recycled paper cups, and even drink our water from recycled plastic bottles. But what about building materials?
In the human body, small wounds are easily treated by the body itself, requiring no further care. For bigger wounds to be healed, the body may need outside assistance. Concrete is like a living body, in that it can self-heal its own small wounds (cracks) as an intrinsic characteristic.
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