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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 616 Abstracts search results
Document:
CI4703ConcreteTrophy
Date:
March 1, 2025
Publication:
Concrete International
Volume:
47
Issue:
3
Abstract:
This year, during the ACI Concrete Convention – Fall 2025 in Baltimore, MD, USA, ACI will introduce a brand-new, custom-designed Excellence Award trophy made from a special concrete mixture. The new trophies will be unveiled and awarded at the ACI Excellence in Concrete Construction Awards Gala.
CI4612PRO
December 1, 2024
Author(s):
Phil Diekemper
46
12
Currently, about 50% of all ready mixed concrete in the United States is produced using Type IL cement. However, in comparison to mixtures with Type I/II cement, there is a lack of information concerning constructability with such mixtures. To create a knowledge base, with a grant from the ACI Foundation, the American Society of Concrete Contractors and Giatec Scientific Inc. are collecting design characteristics of well-performing mixtures with Type IL cement for interior, non-air-entrained concrete floor slabs.
CI4611Snell
November 1, 2024
Luke M. Snell, Karthik H. Obla, and Nicholas J. Carino
11
Overdesigning concrete mixtures for compressive strength results in an increased carbon footprint due to much higher cementitious materials content and added construction costs. This article discusses some of the reasons why concrete mixtures are overdesigned and offers recommendations to avoid unnecessarily high overdesigns.
CI4610CPCstatement
October 1, 2024
10
There has been a trend toward replacing the production of Type I/II and II/V cements with Type IL cement or portland limestone cement (PLC). PLC exhibits greater variability from source to source which can lead to challenges such as altered initial setting characteristics, variations in compressive strength gain rates, and changes in bleed rates. This necessitates adjustments to mixture designs, placing and finishing techniques, and polishing methods.
SP-363-1
July 1, 2024
Raid S. Alrashidi, Rami Zamzami, Megan S. Voss, Daniel J. Alabi, Christopher C. Ferraro, H. R. Hamilton, Joel B. Harley, and Kyle A. Riding
Symposium Papers
363
The presence of chloride ions is one of the most widespread causes of corrosion initiation in reinforcing steel in concrete. Trace chlorides present in cementitious materials or admixtures typically result in very low fresh chloride contents in normal-strength concrete that do not present a danger of corrosion. UHPC mixture designs, however, use much higher dosages of cementitious materials and admixtures that can result in non-negligible total fresh chloride contents. These high chloride values are likely to occur more frequently in the future as more UHPC mixtures are made with locally available materials and alternative cementitious materials and may result in concrete mixtures failing to meet specifications for fresh chloride content limits that are based on mixture proportions used in normal-strength concrete mixtures. UHPC and normal concrete samples were made without fibers and with increasing levels of internally admixed chlorides for four different levels of strength to determine chloride thresholds for internally added chlorides. The chloride threshold for fresh concrete was measured using a slightly modified version of the accelerated test EN 480-14. The water-soluble and acid-soluble chloride ion content of UHPC mixtures tested were measured according to ASTM C1218 and Florida Method FM 5-516 to determine the bound chlorides and fresh chloride limits for corrosion. The results demonstrate that the UHPC had ~ 25% higher chloride threshold than the control mixture when measured as an absolute content per unit volume of concrete. When the UHPC chloride content is normalized by mass of cementitious material, it was found that the amount needed to initiate corrosion may be lower than fresh chloride limits given in ACI-318 and ACI 222. Therefore, the ACI-318 water-soluble chloride limits as a % by mass of cementitious materials were found to be non-conservative for the two of the UHPC mixtures tested and should be re-examined for UHPC.
DOI:
10.14359/51742104
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