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Home > Publications > International Concrete Abstracts Portal
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.
CI4605He
May 1, 2024
Author(s):
Jialuo He, Thippapha Aloundeth, Zhipeng Li, and Xianming Shi
46
5
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.
SP-361_02
March 1, 2024
Michelle A. Helsel, Milena Rangelov, Robert Spragg, Michael Praul
Symposium Papers
361
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
CI4410Q&A
October 1, 2022
44
10
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?
SP-355_17
July 1, 2022
E. Redaelli, M. Carsana, A. Filippi, F. Lollini
355
The use of recycled aggregates allows for reducing the environmental impact of concrete materials, by reducing the amount of waste and limiting the consumption of natural resources. Recycled asphalt pavement (RAP) is a granular material that comes from the milling of road pavements whose size and distribution make it suitable as aggregate for concrete. The environmental benefits of the replacement of natural aggregate with RAP need to be assessed with a better understanding of the long-term behavior of RAP concrete, considering the evolution of its performance in time and its ability to guarantee an adequate service life when exposed in operating conditions. This note presents the preliminary results of research on the effect of RAP on concrete properties. The addition of RAP aggregate affects concrete properties in a fresh and hardened state. Some parameters showed clear trends with the percentage of RAP, however, also other factors (e.g. w/c ratio and curing time) seem to play a role. Compressive strength and dynamic modulus of elasticity of RAP concrete were always lower compared to reference concrete, while the electrical resistivity did not show a clear trend. Further investigations will be carried out to clarify the role of RAP aggregate.
10.14359/51736023
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