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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 321 Abstracts search results
Document:
SP366_11
Date:
October 1, 2025
Author(s):
Ceki Halmen, David Trejo, Momn Telfah
Publication:
Symposium Papers
Volume:
366
Abstract:
Corrosion of reinforcement is a common deterioration problem for reinforced concrete structures at coastal areas causing early failure, increased maintenance costs, and significant safety problems. This paper combines a wellestablished diffusion-based service life estimation method with recently developed data-driven models on surface chloride concentration accumulation and critical chloride threshold distribution data to probabilistically analyze the effect of design parameters such as water-cement ratio (w/c), cover depth, and admixed chloride content in various coastal exposure zones. Results indicate that the used probabilistic analysis can result in changes to estimated service life values by an order of magnitude. Although w/c and cover depth were the most significant factors affecting the service life, parameters such as wind speed, temperature, exposure zone, and distance from the coast were identified as influencing the service life of coastal structures.
DOI:
10.14359/51749239
SP366_10
David Whitmore
Reinforced concrete is prevalent in construction for its strength and longevity. However, it can be susceptible to corrosion when exposed to chloride ions, particularly in areas affected by de-icing salts and marine environments. The technique known as Electrochemical Chloride Extraction (ECE) helps combat this corrosion by pulling chlorides away from the reinforcing steel and raising the concrete's pH around the steel. This paper examines the technique's development, the electrochemical reactions, and its effects on corrosion rates. Although ECE can dramatically lower chloride-induced corrosion, immediate post-treatment measurements often reveal increased corrosion rates as the passive oxide layer is re-established. A comparison of Linear Polarization Resistance (LPR) measurements before and after ECE illustrates the technique's effectiveness.
10.14359/51749238
SP356_10
October 1, 2022
Roberto Rodriguez, Vanessa Benzecry, Steven Nolan, and Antonio Nanni
356
Glass fiber-reinforced polymer (GFRP) bars show promise as a non-corrosive reinforcement alternative for coastal marine applications. Designers are reluctant to use new material systems without guidance or case studies demonstrating successful implementation. For the case of precast concrete piles, the current practice is prestressing with carbon steel strands. In this paper, a seawall replacement project in South Florida allowed for the demonstration of the use of reinforced concrete (RC) piles using GFRP bars and spirals. The field performance of the GFRP-RC piling system was validated by collecting data during driving by means of a pile driving analyzer (PDA). The measured internal stresses in the pile were compared with code requirements and concrete compressive strength determined from laboratory tests. The structural design used for these GFRP-RC piles and field-collected data on pile resistance, stresses, and integrity is presented and discussed in this paper.
10.14359/51737269
SP-355_01
July 1, 2022
Gilberto Artioli, Anna Bravo, Stefano Broggio, Giorgio Ferrari, Francesco Santonicola, Francesco Surico, Luca Torelli, Luca Valentini, Andrea Zecchini
355
The new San Giorgio bridge replaced the Polcevera viaduct, built between 1963 and 1967 and collapsed during a storm in summer 2018. The new bridge was designed by Renzo Piano and is made by 19 steel spans supported by 18 concrete pillars. Beside the architectural aspects, special attention was devoted to the mix-design of the pillars, to ensure the production of durable concrete in the marine environment. The use of slag cement combined with limestone filler and polycarboxylate superplasticizers allowed to cast flowable concrete associated with low water to cement ratio and high final compressive strength. A new generation accelerating admixtures, working on the homogeneous nucleation technology, was used to accelerate the cement hydration and gain early compressive strength to speed-up the elevation of the pillars. In the present paper, the advantage of using the new admixture is discussed both in terms of early strength development and microstructure of the cement paste. Beside the improvement of the early strength development, the new admixture reduced the water permeability and the chloride diffusion and improved the resistance to carbonation of the concrete used for the pillars, with further advantages for the durability of this structure.
10.14359/51736007
CI4205ConcreteQA
May 1, 2020
Concrete International
42
Issue:
5
I’m designing a foundation to support a liquefied natural gas (LNG) tank in a marine environment, and I want to use epoxy-coated reinforcement (ECR). In case of a major spill, the pier will be exposed to LNG at cryogenic temperatures. However, per Section 4.7.1 of ACI 376-11,1 deformed reinforcement at service temperatures equal or greater than 0°F (–18°C) must be uncoated. How can I meet the code and protect the reinforcement?
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