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Home > Publications > International Concrete Abstracts Portal
Showing 1-5 of 122 Abstracts search results
Document:
CI4609EPAgrants
Date:
September 1, 2024
Publication:
Concrete International
Volume:
46
Issue:
9
Abstract:
The U.S. Environmental Protection Agency (EPA) announced the selection of 38 grant recipients across the country, totaling nearly 160 million USD, to support efforts to report and reduce climate pollution from the manufacturing of construction products. The grants will be awarded to businesses, universities, and nonprofit organizations serving all 50 states and will help disclose the environmental impacts associated with manufacturing concrete, asphalt, glass, steel, wood, and other materials.
CI4607ConventionHighlights
July 1, 2024
7
More than 2000 professionals and students from around the world attended the ACI Concrete Convention in New Orleans, LA, USA, held March 24-28, 2024. ACI’s 197th convention—the sixth convention to be held in New Orleans—offered 100+ hours of industry-leading concrete knowledge through educational sessions, networking events, committee meetings, and student activities.
SP-362_78
June 18, 2024
Author(s):
Yeakleang Muy, Luc Courard, Xavier Garnavault, David Bulteel, Sébastien Rémond, Maria Taleb, and Julien Hubert
Symposium Papers
362
This study focuses on evaluating the mechanical, microstructural, and durability properties of 3D printing mortar (3DPM), with a specific emphasis on the influence of incorporating recycled fine aggregates (RFA). These RFA are produced from construction and demolition waste (C&DW) in Belgium and are sieved to a maximum particle size of 2 mm [0.08 in]. Cast and printed samples of mortar containing 100% RFA, with a sand-to-cement ratio of approximately 1:1 and a water-to-cement ratio of 0.29, were subjected to mechanical tests, including flexural, compressive, and tensile strength, at 2, 7, 28, and 56 days. The possible anisotropic behavior of the printed material was also investigated. The results show that using RFA does not significantly affect the mechanical properties of the mortar, and some anisotropic behavior was observed based on the compression test results. The end goal of the project is to print non-reinforced urban furniture; in order to assess its durability, only freezing and thawing (F-T) behavior was investigated. The F-T behavior was analyzed based on the quantity of spalling particles after 7, 14, 28, 56, and 91 F-T cycles. The results show that up to 91 F-T cycles, no significant surface damage occurred.
This study focuses on evaluating the mechanical, microstructural, and durability properties of 3D printing mortar (3DPM), with a specific emphasis on the influence of incorporating recycled fine aggregates (RFA). These RFA are produced from construction and demolition waste (C&DW) in Belgium and are sieved to a maximum particle size of 2 mm [0.08 in].
Cast and printed samples of mortar containing 100% RFA, with a sand-to-cement ratio of approximately 1:1 and a water-to-cement ratio of 0.29, were subjected to mechanical tests, including flexural, compressive, and tensile strength, at 2, 7, 28, and 56 days. The possible anisotropic behavior of the printed material was also investigated. The results show that using RFA does not significantly affect the mechanical properties of the mortar, and some anisotropic behavior was observed based on the compression test results. The end goal of the project is to print non-reinforced urban furniture; in order to assess its durability, only freezing and thawing (F-T) behavior was investigated. The F-T behavior was analyzed based on the quantity of spalling particles after 7, 14, 28, 56, and 91 F-T cycles. The results show that up to 91 F-T cycles, no significant surface damage occurred.
DOI:
10.14359/51742028
SP-362_31
June 11, 2024
Rennan Medeiros and Leandro. F. M. Sanchez
Achieving low carbon emissions in the concrete industry necessitates a multifaceted approach, which includes maximizing the efficacy of supplementary cementitious materials (SCMs). In this respect, this paper investigates fly ash-concrete made of fly ash from distinct burning technology, benefited by different pieces of equipment. Several aspects of fly ash-concrete performance were assessed, including hydration, mechanical properties, and eco-efficiency. The results showed that the burning technology plays an important role in fly ash reactivity. Although both approaches to mechanically activating fly ashes provide interesting results, there is an intriguing difference in the performance of the fly ash concrete. Furthermore, the lifecycle analysis underscores the potential for considerable reduction in global warming potential through the incorporation of fly ash in concrete, making it a promising avenue for reducing the industry's environmental footprint. These findings offer valuable insights for optimizing fly ash utilization and advancing the sustainability of the concrete sector.
10.14359/51740901
CI4605SlagCementAwards
May 1, 2024
5
The Slag Cement Association (SCA) announced the recipients of its 2023 Slag Cement in Sustainable Concrete Awards program. These awards were unveiled during the ACI Concrete Convention – Spring 2024 in New Orleans, LA, USA.
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