Restrained shrinkage behavior of Self-Compacting Concrete containing ground-granulated blast-furnace slag

Altoubat, Salah; Badran, Deena; Junaid, M. Talha; Leblouba, Moussa

doi:10.1016/j.conbuildmat.2016.10.115

Cited by 45 publications

(12 citation statements)

References 13 publications

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“…The presence of fly ash and GGBS together in concrete reduces the total free shrinkage, despite the fact the GGBS increases autogenous shrinkage [30]. However, in order to decrease cracking potential due to restrained shrinkage in SCC mixing with high volume GGBS, extended moist curing beyond three days is recommended [31]. Mixes G8, G9, and G10 contain 70% or more GGBS, therefore, longer moist curing period of 7 days is recommended to enhance shrinkage cracking resistance.…”

Section: Mixing Methods and Fresh Propertiesmentioning

confidence: 99%

Effect of Mix Constituents and Curing Conditions on Compressive Strength of Sustainable Self-Consolidating Concrete

Mohamed

2019

Sustainability

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The production of cement requires significant energy and is responsible for more than 5% of global CO2 emissions; therefore it is imperative to reduce the production and use of ordinary portland cement (OPC). This paper examines the compressive strength development of low water-to-binder (w/b) ratio self-consolidating concrete (SCC) in which 90% of the cement is replaced with industrial by-products including ground granulated blast furnace slag (GGBS), fly ash, and silica fume. The emphasis in this paper is on replacing a large volume of cement with GGBS, which represented 10% to 77.5% of the cement replaced. Fresh properties at w/b ratio of 0.27 were examined by estimating the visual stability index (VSI) and t50 time. The compressive strength was determined after 3, 7, 28, and 56 days of curing. The control mix made with 100% OPC developed compressive strength ranging from 55 MPa after three days of curing to 76.75 MPa after 56 days of curing. On average, sustainable SCC containing 10% OPC developed strength ranging from 31 MPa after three days of curing to 56.4 MPa after 56 days of curing. However, the relative percentages of fly ash, silica fume, and GGBS in the 90% binder affect the strength developed as well. In addition, this paper reports the effect of the curing method on the 28 day compressive strength of environmentally friendly SCC in which 90% of the cement is replaced by GGBS, silica fume, and fly ash. The highest compressive strength was achieved in samples that were cured for three days under water, then left to air-dry for 25 days, compared to samples cured using chemical compounds or samples continuously cured under water for 28 days. The study confirms that SCC with 10% OPC and 90% supplementary cementitious composites (GGBS, silica fume, fly ash) can achieve compressive strength sufficient for many practical applications by incorporating high amounts of GGBS. In addition, air-curing of samples in a relatively high temperature (after three days of water curing) produce a higher 28 day compressive strength compared to water curing for 28 days, or membrane curing.

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Section: Mixing Methods and Fresh Propertiesmentioning

confidence: 99%

Effect of Mix Constituents and Curing Conditions on Compressive Strength of Sustainable Self-Consolidating Concrete

Mohamed

2019

Sustainability

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“…GGBS at 50% -70% may be utilized in structural elements with a high or low degree of constraints, respectively, after a seven-day wet curing period. With three days of wet curing at a higher degree of constraint, the combined FA with GGBS improved the SCC's cracking resistance [96]. MK has a high C-S-H gel concentration with a greater water-cement ratio.…”

Section: Influence Of Mineral Admixture On the Durability Properties In Sccmentioning

confidence: 98%

“…Also, SCC featured fewer and more circular air gaps than conventional vibrated concrete [95]. Altoubat et al [96], for example, showed that the GGBS concentration and curing regime had a substantial effect on the SCC's cracking potential regardless of the restriction degree. GGBS at 50% -70% may be utilized in structural elements with a high or low degree of constraints, respectively, after a seven-day wet curing period.…”

Section: Influence Of Mineral Admixture On the Durability Properties In Sccmentioning

confidence: 99%

Influence of Mineral Admixtures on the Properties of Self-Compacting Concrete: An Overview

2021

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Mineral admixtures are often utilized in Self-Compacting Concrete (SCC) mixtures to provide stability and resistance to bleeding and segregation throughout transportation and placement. Additionally, these more refined materials help in lowering building costs and reducing the use of main resources. SCC is an innovative method of concrete, which is placed and compacted without the use of vibration. As a result, the concrete mixture has the ability to flow under its self-weight to fully fill formwork and achieve total compaction even when reinforced by crowded reinforcement. However, self-compacting concrete is not cost-effective, which results in the use of large amounts of ordinary cement and chemical admixtures. The utilization of mineral admixtures, including silica fume, ground granulated blast furnace slag, fly ash, and coal bottom ash, is an alternative method to decrease the high cost of self-compacting concrete - it is a term, which refers to the components that have been finely divided and added to concrete during the mixing process. Furthermore, the utilization of admixtures in the fabrication of self-compacting concrete has shown that it helps in lowering the heat of hydration. In addition, the inclusion of admixtures reduces the necessity for chemical admixtures that increase viscosity in concrete mixtures. This study aims to provide an overview of the previously conducted studies on mineral admixtures, which are utilized in SCC. Moreover, the study aims to discuss the durability and mechanical performance of SCC.

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“…Boukendakdji et al [44] researched the influence of GBFS on SCC and discovered that the early compressive strength of concrete reduced as GBFS admixture increased, but the post-strength (at 56 days and 90 days) did not appreciably decrease (Figure 12). Altoubat et al [89] also discovered that GBFS lowers the strength of SCC, with the 28-day compressive strength decreasing by around 10% at 70% admixture, while In contrast, SF with high fineness and pozzolanic reactivity frequently enhances the strength properties of SCC [9]. From the results of Fakhri [86,87], the incorporation of 10% SF can improve the compressive strength by more than 30% and increase the flexural strength by around 20%; the addition of 25% SF can optimize the flexural strength by approximately 40%.…”

Section: Data Availability Statementmentioning

confidence: 99%

Advances in Sustainable Concrete System

2022

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Restrained shrinkage behavior of Self-Compacting Concrete containing ground-granulated blast-furnace slag

Cited by 45 publications

References 13 publications

Effect of Mix Constituents and Curing Conditions on Compressive Strength of Sustainable Self-Consolidating Concrete

Effect of Mix Constituents and Curing Conditions on Compressive Strength of Sustainable Self-Consolidating Concrete

Influence of Mineral Admixtures on the Properties of Self-Compacting Concrete: An Overview

Advances in Sustainable Concrete System

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