Fresh and hardened properties of steel fiber-reinforced grouts containing ground granulated blast-furnace slag

Kim, Dong-Joo; Park, Gi-Joon; Le, Huy Viet; Moon, Do-Young

doi:10.1016/j.conbuildmat.2016.06.005

Cited by 26 publications

(8 citation statements)

References 16 publications

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“…Glass beads and bubbles were inserted with the binders, following the conventional method, whereas fibers were added and mixed by hand, at the end of the high-speed mixing. According to relevant studies [13][14][15][16], extreme foaming, fiber aggregation and clumping takes place when fibers are added at the beginning of the mixing procedure and especially when a high-speed mixer is used.…”

Section: Mixing and Testing Proceduresmentioning

confidence: 99%

“…The use of fibers in grouts has been studied since the 1990s, focusing, however, on cement-based grouts [12][13][14]. According to the literature, mainly steel, polypropylene and carbon fibers have been used, affecting both the fresh and hardened state properties of grouts [15][16][17][18][19]. The addition of fibers usually improves bleeding, flexural, and compressive strength, as well as cracking resistance [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…According to the literature, mainly steel, polypropylene and carbon fibers have been used, affecting both the fresh and hardened state properties of grouts [15][16][17][18][19]. The addition of fibers usually improves bleeding, flexural, and compressive strength, as well as cracking resistance [15][16][17][18][19]. The mixing procedure is a significant aspect, highlighted by researchers, as it is conducted to avoid fibers' clumping and aggregation [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…The mixing procedure is a significant aspect, highlighted by researchers, as it is conducted to avoid fibers' clumping and aggregation [12][13][14]. To this end, fibers are usually added in the grout mixtures during or after the last stage of mixing [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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The Role of Glass Additives in the Properties of Lime-Based Grouts

Pachta

2021

Heritage

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Various types of additives have been diachronically used in historic mortars, whereas their use in lime-based grouts, used for the restoration of historic structures, is rather limited. In this study, an effort was made to investigate the performance of glass additives in grouts, consisting of lime and natural pozzolan. The additives concerned glass fibers (3 and 6 mm in length), glass beads and bubbles, added in a proportion 0.3–3% w/w of binders. Five grout compositions were manufactured and their properties at fresh and hardened states were tested. From the evaluation of the results, it was asserted that glass additives influenced the grouts’ performance in a favorable way. Their fresh state and physical properties were maintained or slightly improved, while there was a significant enhancement of the long-term mechanical characteristics of the mixes. Additionally, the adhesion capability of grouts was notably increased, which is a crucial aspect indicating their efficacy.

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Section: Mixing and Testing Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Role of Glass Additives in the Properties of Lime-Based Grouts

Pachta

2021

Heritage

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“…The experimental studies conducted by Shin et al (2014) and Han et al (2015a) were among limited studies investigating the confinement effect of HPFRCCs in coupling beams detailed following ACI 318M-14 (ACI, 2014). They all implied the potential of HPFRCCs that may contribute to the reduction of reinforcement congestion in coupling beams (Kim et al, 2016;Le-Trung et al, 2011;Quang et al, 2016).…”

Section: Introductionmentioning

confidence: 98%

Reduction of reinforcement congestion in slender coupling beam using bundled diagonal bars

Mai-Quang

Han

Shin

et al. 2017

Magazine of Concrete Research

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The current design method in the ACI building code 318M-14 for reinforced-concrete coupling beams requires complex details, which leads to reinforcement congestion and difficulty in construction. As an original solution for this issue, the use of steel fibres to reduce the amount of transverse and bundled diagonal reinforcement in coupling beams is investigated in this study. In order to estimate the effect of the expected design method, four coupling beam specimens with 2/3 scale subjected to cyclic lateral loads were tested. All specimens were made of steel-fibre-reinforced concrete. One specimen complied with ACI code-specified reinforcement details (for all diagonal, transverse and horizontal bars) and three specimens used bundled diagonal reinforcement with variation in the spacing of stirrups. The global behaviours of the tested coupling beams are discussed, especially focusing on the strength, ductility and energy dissipation capacity as displacement demand increases. The test results illustrate that the lateral force-resisting performance of coupling beams was effectively improved by using steel fibres and bundled diagonal reinforcement, even with a reduced amount of stirrups, compared to that designed following ACI code-specified reinforcement details.

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