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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 102 Abstracts search results
Document:
CI4704Ehsani
Date:
April 1, 2025
Author(s):
Mo Ehsani
Publication:
Concrete International
Volume:
47
Issue:
4
Abstract:
This article introduces the latest fiber-reinforced polymer panel system developed by the author—SPiRe®+. These panels can serve as formwork, corrosion resistant reinforcement, and waterproofing. With their flat and smooth exterior face and protruding T-profiles on the interior face, the panels act as reinforcing elements for strengthening beams, slabs, and walls.
DOI:
10.14359/51746694
CI4701Mizer
January 1, 2025
Jennifer K. Mizer
1
The longevity of concrete is influenced by several interrelated challenges, each contributing to its gradual degradation. By addressing both technical and environmental considerations, stakeholders can achieve durable, cost-effective, and eco-friendly concrete solutions that contribute to the long-term sustainability of concrete.
10.14359/51745471
SP-360_17
March 1, 2024
Faisal Mukhtar
Symposium Papers
360
The first phase of this work uses experimental evidence to critique some shortcomings of the so-called improved double-lap bond shear tests regarding their limited application to wet layup fiber-reinforced polymer (FRP) and their inapplicability to pultruded FRP laminates. Even in the case of the wet layup FRP, the study provides some evidence of high chances of obtaining undesirable fiber rupture that preclude the use of the results as reliable means for interpreting the FRP-concrete bond-slip models. Further proposed modifications to overcome these challenges are provided by designing a convertible bond tester applicable to both wet layup and pultruded FRP laminates. Apart from the application of the apparatus to FRP-concrete bond assessment under pure double shear, it proved to be applicable to conducting mixed-mode bond tests. The second phase of the work upgrades the so-designed test apparatus to make it convertible to bond testing of other variants (near-surface mounted [NSM] FRP bars/strips, fiber-reinforced cementitious mortar [FRCM], etc.) of strengthening systems without developing a different apparatus for each. The apparatus allows testing the NSM FRP-concrete bond in a novel manner compared to the traditional practice. Also, given the absence of mixed-mode studies for FRCM, the apparatus provides a pioneer means of conducting the same.
10.14359/51740629
SP-354_28
July 1, 2022
Yufeng Li, Serina Ng, Gan Wang, Lei Liu, Long Wang
354
In order to improve the durability of concrete, a novel waterproofing agent was developed and its effect on concrete performance was studied in detail. Through the research, it is found that when stearic acid is present in the form of ammonium salt in the waterproofing agent, concrete has the highest compressive strength and the best waterproof performance, and the optimum nNH3: noctadecanoic acid is 1.34, woctadecanoic acid: wamines is 6.45. When the dosage of the waterproofing agent in concrete is 10-30 kg/(1 m³ concrete), the 48h water absorption rate of concrete is reduced by 44.7%~57.4%, and strength increases by at least 30%. By comparing with other waterproofing agents of the same type at home and abroad, it is found that the waterproofing agent provided in this paper has the lowest chloride ion permeability, concrete compactness, and water absorption. After adding a waterproofing agent to the concrete, the chloride migration coefficient and electric flux of concrete are reduced, and the reduction was 37.7% and 22.6%, respectively. The waterproofing agent is a solid-liquid mixture.
10.14359/51736084
SP-351_04
April 1, 2022
Nicholas Triandafilou, Mark Guirguis, Ephraim Dissen, Olu Awomolo, and Mustafa Mahamid
351
Fireproofing deterioration is widespread in industrial facilities throughout the country. Spalling concrete has potential to damage equipment and harm personnel. Replacing concrete fireproofing like-in-kind, without consideration for proper anchorage or material durability, does not eliminate the hazard as spalls may potentially occur again over time. However, when properly designed and installed, concrete is a durable option for replacing deficient fireproofing in aggressive environments typically present in industrial processing units. This paper presents the results of a case study on a structure in a Midwest industrial complex. Extensive concrete fireproofing repairs were performed on the structure 12 years ago. Design requirements included normal weight concrete with polypropylene fibers which enhance durability by improving cracking resistance. During a fire, the fibers melt forming relief channels for moisture to escape, thus eliminating explosive spalling. Installation methods included welded wire reinforcement (WWR) with positive anchorage to structural steel. WWR was attached to post-installed adhesive anchors between column flanges where existing fireproofing was sound and difficult to remove. After 12 years in service, repairs exhibit no significant defects. This level of durability is attributed to the design and installation methods utilized. Concrete fireproofing is a durable option for fire protection, provided structures are designed to support its weight, its mixture design is properly proportioned, and it is adequately anchored and reinforced.
10.14359/51734674
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