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Home > Publications > International Concrete Abstracts Portal
Showing 1-5 of 312 Abstracts search results
Document:
CI4607Reigstad
Date:
July 1, 2024
Author(s):
Gordon H. Reigstad, Jason G. Reigstad, and Jared M. Reigstad
Publication:
Concrete International
Volume:
46
Issue:
7
Abstract:
The PS=Ø system allows engineers to design post-tensioned (PT) and reinforced concrete members with more restraint releases and without the construction schedule delays of traditional pour strips. With or without temporary PT stressing strips, PS=Ø couplers can be used as restraint relief details in slab-to-slab, slab-to-wall, and beam-to-beam joints.
CI4604Britt_spotlight
April 1, 2024
Jennifer Britt
4
Existing concrete slabs and structures require scanning and imaging before any build out, renovation, or excavation work begins. Ground-penetrating radar technology has established itself as the primary tool for fast, effective, and efficient determination of the presence of utilities and embedded structural members, such as post-tensioning tendons and reinforcing bars.
CI4601Klinger
January 1, 2024
James Klinger, Joseph F. Neuber Jr., Jeffrey Ondo, and Bruce A. Suprenant
1
Placing and finishing of concrete slabs with portland-limestone cement (Type IL cement) may create issues for some contractors, and bleeding rate is a major factor. The article discusses saw cutting, cold weather protection, post-tensioning, and form removal, as well as best practices and strategies to minimize risks during floor slab finishing and early-age, strength-critical construction with Type IL cement.
SP358_06
October 1, 2023
Julian D. Rincon, Kinsey C. Skillen, Santiago Pujol, Yu-Mei Chen, Aishwarya Y. Puranam, and Shyh-Jiann Hwang
Symposium Papers
358
There are too many reinforced concrete (RC) columns built before mid-1970s without sufficient transverse reinforcement. By now, we understand quite well the importance of transverse reinforcement in allowing a column to maintain its integrity under large displacement reversals in the nonlinear range of response. Poorly confined RC columns undergo a fast decay in resistance due to formation of criss-crossing inclined cracks, which can cause an abrupt failure or more gradual disintegration and trigger collapse of the structure. Those columns need to be strengthened to increase their drift capacity. Although there are several alternatives to retrofit RC columns, they often require specialized workmanship and equipment, and involved installation procedures. An easy-to-design and easy to implement retrofit technique is examined here. It consists of external post-tensioned clamps fastened around the column. Results of tests on full-scale RC columns furnished with the proposed clamps suggest the clamps can be effective in increasing column shear strength and drift capacity.
DOI:
10.14359/51740233
CI4510Weilacher
September 29, 2023
Weilacher, R.M.; Newsome, J.; and Harrison, G.H.
45
10
Riverworks at Eastern Wharf is a mixed-use development in Savannah, GA, USA. A massive fire at the construction site caused severe damage to this project. The article describes the investigation of the structure’s condition after the fire, damage evaluation, and repair of the concrete structure of the podium slab and post-tensioning cables.
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The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.