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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 35 Abstracts search results
Document:
24-437
Date:
October 8, 2025
Author(s):
Syed Jafar Shah Bukhari, Lynda Bouchelil, Abdullah Al-Fahim, and Mehdi Khanzadeh Moradllo
Publication:
Materials Journal
Abstract:
The production of Ordinary Portland Cement (OPC) is a major contributor to carbon emissions. One immediate and viable solution is the use of optimized concrete mixtures that employ a decreased quantity of cement and increased dosage of high-range water-reducing (HRWR) admixtures. This study investigates five different concrete mixtures with varying w/c (0.37 to 0.42) and reduced cement contents. The mixtures with “low cement + high dosage HRWR admixture” content had over 30% increase in mechanical strength and presented 40% lower water absorption, and 68 to 97% higher formation factor, indicating enhanced durability. The optimized concrete mixtures with reduced cement and lower w/c have a service life increase of up to 117% and a life-cycle cost reduction of 29%. The application of “low cement + high dosage HRWR admixture” mixtures can improve the sustainability of concrete mixtures by reducing cement and water contents and increasing the service life of concrete in severe environments.
DOI:
10.14359/51749249
23-117
May 1, 2025
Mustafa M. Raheem and Hayder A. Rasheed
Structural Journal
Volume:
122
Issue:
3
Extensive experimental verification has shown that the use of fiber-reinforced polymer (FRP) anchors in combination with externally bonded FRP composites increases the flexural capacity of existing reinforced concrete (RC) structures. Thus, a rational prediction model is introduced in this study so that fiber splay anchors may be accurately designed for practical strengthening applications. Simplified structural mechanics principles are used to build this model for capacity prediction of a group of fiber splay anchors used for FRP flexural strengthening. Three existing test series using fiber splay anchors to secure FRP-strengthened T-beams, block-scale, and one-way slabs were used to calibrate and verify the accuracy and applicability of the present model. The present model is shown to yield very accurate predictions when compared to the results of the block-scale specimen and eight different one-way slabs. The proposed model is also compared with the predictions of a design equation adapted from the case of channel shear connectors in composite concrete-steel construction. Results show a very promising correlation.
10.14359/51745639
22-117
November 1, 2022
Jack J. Poldon, Neil A. Hoult, and Evan C. Bentz
119
6
The shear-carrying mechanism in reinforced concrete (RC) has long been uncertain, partly because previously available sensors were insufficient for capturing local behavior. In this study, three large RC beams with stirrups were instrumented with distributed fiber-optic sensors (DFOS) to measure the strain along the full length of the reinforcing bars, while digital image correlation (DIC) was used to measure distributed crack movement to calculate the forces that they transfer. The DFOS measurements along the stirrups showed that the total stirrup force along a shear crack was insufficient to resist the total applied shear. Free-body diagrams (FBD) were constructed along diagonal cracks using the sensor measurements and constitutive relations to investigate if the resulting summation of forces would be in equilibrium, and the results suggest that the main elements of shear resistance have been, at least approximately, identified for the first time with the aid of distributed sensing.
10.14359/51737148
21-086
January 1, 2022
Fei Peng, Weijian Yi, and Zhi Fang
1
A new simplified method considering size effect was proposed to calculate the flexural strength of reinforced ultra-high performance concrete (UHPC) members in this paper. First, an iterative numerical procedure was developed to predict the moment-curvature behavior of reinforced UHPC sections. Based on the developed procedure and available experimental results, the performance of three constitutive models for UHPC under tension was evaluated. It was found that the size-dependent stress-strain model could provide accurate and consistent predictions of the flexural strength of reinforced UHPC members, while the size-independent model overestimated the flexural strength of largescale members. A parametric study was then conducted to evaluate the contribution of fibers and the size effect. An equivalent rectangular stress block was proposed to simplify the tensile stress distribution of UHPC. On this basis, a simplified yet rational design approach for predicting flexural strength was proposed based on a regression analysis of parametric analysis results. Finally, the accuracy of the proposed approach was verified based on the available experimental results of 117 reinforced UHPC members.
10.14359/51734140
MJ November 2020 V. 117 No 6
November 1, 2020
Complete Journal
117
10.14359/51731551
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