International Concrete Abstracts Portal

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 413 Abstracts search results

Document: 

CI4704NexInsights

Date: 

April 1, 2025

Publication:

Concrete International

Volume:

47

Issue:

4

Abstract:

There is a lack of comprehensive guidelines for the use of fiber-reinforced polymer (FRP) dowels in concrete pavement construction. In light of this, NEx: An ACI Center of Excellence for Nonmetallic Building Materials has announced a newly published document SG23.03 (25): NEx Guideline: FRP Dowels in Concrete Pavements.


Document: 

CI4605He

Date: 

May 1, 2024

Author(s):

Jialuo He, Thippapha Aloundeth, Zhipeng Li, and Xianming Shi

Publication:

Concrete International

Volume:

46

Issue:

5

Abstract:

Increasing use of deicing chemicals can pose a great risk of premature failure of concrete infrastructure such as pavements and bridge decks. This article discusses an immersion study of ordinary portland cement and high-volume fly ash mortars in MgCl2 solution under room temperature and its influence on mechanical properties and transport property.


Document: 

SP-361_02

Date: 

March 1, 2024

Author(s):

Michelle A. Helsel, Milena Rangelov, Robert Spragg, Michael Praul

Publication:

Symposium Papers

Volume:

361

Abstract:

To support a rapid integration of sustainability principles into paving concrete practice, this study provides a closer look into readily implementable cement and concrete decarbonization strategies. To do so, this study relies on combined stakeholder involvement, quantitative analysis using Life Cycle Assessment (LCA), and the state-of-the-practice in the US paving concrete industry to understand merits of each solution. The results indicate that concrete mix design optimization is a promising, yet not widely applied solution that can reduce costs, enhance durability, and provide average carbon emissions savings of 14 percent. Use of supplementary cementitious materials (SCM) is another solution with multiple benefits, however, the use of SCM is already widely implemented across the USA. Industry-wide improvement in cement carbon footprint due to energy efficiency can provide additional savings of up to 10 percent. Quantifying the environmental footprint of concrete is critical to inform decision-making and enable more sustainable outcomes.

DOI:

10.14359/51740604


Document: 

CI4410Q&A

Date: 

October 1, 2022

Publication:

Concrete International

Volume:

44

Issue:

10

Abstract:

The transverse joint detail on a concrete pavement project called for smooth dowel bars. Due to unavailability of such bars, the general contractor directed the concrete contractor to use greased deformed reinforcing bars instead. Will the greased deformed bars work as an equivalent to smooth dowels in contraction joints?


Document: 

SP-355_19

Date: 

July 1, 2022

Author(s):

N. Klein, F. Lang-Scharli, T. Kränkel, C. Gehlen

Publication:

Symposium Papers

Volume:

355

Abstract:

We analyzed pervious concrete with regard to its acoustic absorption behavior. For this purpose, we cast a pervious concrete test series using different coarse aggregates varying in shape (crushed vs. rounded) or size (2-5 mm (0.08-0.20 in.)), to 8-11 mm (0.31-0.43 in.)). All test series were compacted in a gyratory compactor with variable intensities to reach an aimed total porosity of 25.0, 22.5, and 20.0 % by vol. and thus to evaluate the effect of the amount of the porosity beside the effects of aggregate shape and geometry on the acoustic absorption. Furthermore, we quantified the effect of the pervious concrete layer height on its acoustic absorption by a stepwise alternate cutting and measuring of the specimens at layer heights from 100 mm (3.94 in.) to 40 mm (1.74 in.). We used the first maximum of the absorption coefficient, its frequency, and the sound wave propagation speed in the porous material to evaluate the acoustic absorption. In general, a higher porosity, bigger grain size, the use of rounded aggregates, and higher cylinder height increases the acoustic absorption. A characteristic pore structure factor was found, which allows a prediction of the frequency in dependence of the cylinder height.

DOI:

10.14359/51736028


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