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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 1-4 of 4 Abstracts search results
March 1, 2018
Shi-ping Yin, Yao Li, Zhe-yu Jin, and Peng-hao Li
Textile-reinforced concrete (TRC), which has superior crack- and corrosion-resistance capacity, is a type of available inorganic repairing material. However, TRC is still undefined in terms of its interfacial performance between it and existing concrete under marine erosion environments. In this paper, a double-side shear test was used to study the effect of TRC precracking, concrete strength, interface form, short-cut fiber, and freezing-and-thawing cycle number on the interfacial bond properties between TRC and existing concrete under chloride salt erosion and freezing-and-thawing cycles. The results indicate that the shear capacity can be improved by increasing the concrete strength, roughening the reinforced interface, and adding short-cut fibers into the TRC. In addition to that, proper precracking in TRC can also improve the interfacial properties; however, increasing the precracking of TRC to a certain extent will decrease the interfacial properties. In addition, as freezing-and-thawing cycles increase, interfacial properties between TRC and existing concrete will decrease, obviously without serious deterioration in the TRC layer. Therefore, TRC has the potential application of repairing and enhancing existing concrete structures under a harsh freezing-and-thawing environment.
January 1, 2011
Bong-Gu Kang, Joachim Hannawald, and Wolfgang Brameshuber
To analyze the damage and failure mechanisms of a multifilament yarn embedded in concrete during a pullout test, an acoustic emission analysis was carried out for the identification and localization of filament ruptures. The different damage mechanisms (filament rupture, filament debonding, and concrete microcracking) causing acoustic emission were first characterized for separation. Tests were carried out to generate isolated signals, which were studied using signal and frequency analysis. A high localization accuracy of the filament ruptures in the yarn pullout test could be achieved, and the damage progress of the yarn during the pullout test could be analyzed in detail.
September 1, 2007
Josef Hegger, Oliver Bruckermann, and Alaa G. Sherif
The effect on load-bearing behavior on the inclination of the rovings in textile-reinforced concrete with respect to the load direction is investigated. An analytical model that takes into account the increased bond capacity due to lateral pressure on the roving at the crack edge is developed. Two important parameters are introduced: the length, along which the roving changes its direction and is subjected to lateral pressure, and a parameter describing the increase in bond performance depending on the lateral pressure. The effect of these parameters is demonstrated by numerical examples.
Oliver Bruckermann, Josef Hegger, and Alaa G. Sherif
A macrolevel model for textile-reinforced concrete is presented. The focus of the model lies in the phenomenological representation of the major effects of an inclination of the fabric with respect to the load direction. These effects are the alignment of the textile with the direction of tensile stresses, the increasing tension stiffening due to local lateral pressure, and the damage of the textile at the crack. The overall stress of the composite section comprises three stress components: 1) the concrete stress, which is calculated using a microplane damage model; 2) the tension stiffening stress; and 3) the textile stress. The latter is based on a mesolevel precalculation applying the Two-Subrovings Model. An example of application shows that the model is capable of reproducing experimental data, that is, the stress-strain relationship of uniaxial tensile tests with inclined textile orientation.
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