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Home > Publications > International Concrete Abstracts Portal
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.
Showing 1-5 of 11 Abstracts search results
Document:
SP280
Date:
December 29, 2011
Author(s):
Editors: Corina-Maria Aldea & Mahmut Ekenel / Sponsored by ACI Committee 544
Publication:
Symposium Papers
Volume:
280
Abstract:
This CD-ROM contains 10 papers that were presented at sessions sponsored by ACI Committee 544 at the Spring 2011 ACI Convention in Tampa, FL. The topics of the papers cover durability aspects of fiber-reinforced concrete, ranging from permeability, shrinkage cracking, long-term behavior in chloride environment and resistance to chloride penetration, as well as applications of fiber-reinforced concrete for coupling beams for highrise core-wall structures, beams for bridges, panels and suspended foundation slabs. Note: The individual papers are also available. Please click on the following link to view the papers available, or call 248.848.3800 to order. SP-280
DOI:
10.14359/51683561
SP280-08
December 27, 2011
John Jones
The paper will review durability data for glass fiber reinforced concrete (GFRC), both accelerated aging and real time data. It will compare real time data with predicted data from accelerated aging tests and describe the design principles that have been established for GFRC based on this durability data. Applications over 20 years old will be reviewed.
10.14359/51683586
SP280-09
Celik Ozyildirim
Ultra high performance concrete (UHPC) containing steel fibers was used in five beams of the bridge on Route 624 over Cat Point Creek in Virginia. A test beam was also fabricated and tested to failure. The beam had strands but no shear stirrups. Test beam results indicated satisfactory load-carrying capacity. Preparation of the beams involved a longer mixing time and a two-stage steam curing to ensure optimum concrete properties. Testing of specimens at the hardened state showed that UHPC has high strength and high durability attributable to a very low water–cementitious materials ratio, low permeability, a high resistance to cycles of freezing and thawing, and tight cracks.
10.14359/51683587
SP280-10
Xavier Destree, Hans Oscarsson and Mats Pettersson
Steel fiber-only structural reinforcement at a rate of 40-50kg/m³(66-82lb/cu yd) has been used as the sole method of reinforcement of suspended structural slabs which are slabs cast on the ground and supported by a grid of piles. Typical applications include warehouses, factories, office and condominium buildings, towers and, as shown in this paper, sport arenas. The span to depth ratio is between 8 to 22. The 60,000 seating capacity Swedbank Arena in Solna (Stockholm, Sweden) is a project located on a site which does not show any available ground bearing capacity so that the site has been piled completely prior to installing the foundation slab. The pile grid lies between 3m (20ft) and 7m (25ft) distance and the slab’s thicknesses equal 300mm(12in) and 350mm(14in). The suspended foundation slab consists of 16,000cu.m(20,700cu yd). worth of steel fiber reinforced concrete, the total area being 50,000m²(550,000sq.ft): the grass area for the soccer game or as exhibition and concert hall, the technical rooms, and the external parking area, respectively highlighted in green, pink and orange in Fig.3.
10.14359/51683588
SP280-07
Remy Lequesne, Monthian Setkit, Cary Kopczynski, Joe Ferzli, Min-Yuan Cheng, Gustavo Parra-Montesinos, and James K. Wight
Experimental and analytical studies that led to the incorporation of strain-hardening, high-performance fiber reinforced concrete (HPFRC) coupling beams in the design of a high-rise core-wall structure in Seattle, WA, are described. A total of eight HPFRC coupling beams with span-to-depth ratios ranging between 1.75 and 3.3 were tested under large displacement reversals. The tension and compression ductility of HPFRC materials allowed an approximately 70% reduction in diagonal reinforcement, relative to an ACI Building Code (318-08) compliant coupling beam design, in beams with a 1.75 span-to-depth aspect ratio and a total elimination of diagonal bars in beams with a 2.75 and 3.3 aspect ratio. Further, special column-type confinement reinforcement was not required except at the ends of the beams. When subjected to shear stress demands close to the upper limit in the 2008 ACI Building Code (0.83 f’c [MPa] (10 f’c [psi])), the coupling beams with aspect ratios of 1.75, 2.75 and 3.3 exhibited drift capacities of approximately 5%, 6% and 7%, respectively. The large drift and shear capacity exhibited by the HPFRC coupling beams, combined with the substantial reductions in reinforcement and associated improved constructability, led Cary Kopczynski & Co. to consider their use in a 134 m (440 ft) tall reinforced concrete tower. Results from inelastic dynamic analyses indicated adequate structural response with coupling beam drift demands below the observed drift capacities. Also, cost analyses indicated 20-30% savings in material costs, in addition to much easier constructability and reduced construction time.
10.14359/51683585
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