Fresh and hardened properties of seawater-mixed concrete

Younis, Adel; Ebead, Usama; Suraneni, Prannoy; Nanni, Antonio

doi:10.1016/j.conbuildmat.2018.09.126

Cited by 252 publications

(118 citation statements)

References 44 publications

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“…The acceleration of cement hydration in the presence of seawater is enhanced due to the input of chlorides, which are known to be efficient accelerating agents in the cement hydration process, mainly the C 3 S phase (Govindarajan and Gopalakrishnan 2011;Otsuki et al 2015;Etxeberria et al 2016b;Fernanda et al 2017;Parthasarathy et al 2017). As has been widely reported (Li et al 2018a;Wang et al 2018;Younis et al 2018;Shaikh and Dobson 2019), the negatively charged Cl − on the surface of the cement, together with the presence of SCM particles, promotes cement compounds' dispersion and results in an enhancement in hydration. Furthermore, a reaction between the NaCl present in seawater and the hydration product of cement, namely CH, results in the formation of CaCl 2 , a very effective accelerator.…”

Section: Resultsmentioning

confidence: 78%

“…In recent decades, significant achievements have been made in reusing water from concrete production processes (Kucche et al 2015), with the most recent substantial interest being placed on seawater as an alternative solution for impeding the exploitation of freshwater (Xiao et al 2017;Li et al 2018a;Dhondy et al 2019;Jiangtao et al 2019). Due to high desalination costs, as well as the high demand for concrete, there has been a keen interest in incorporating raw seawater in concrete (Wang et al 2018;Younis et al 2018). As water is an irreplaceable material, required to complete the hydration reaction with cement, its quality plays a crucial role in shaping the final mechanical and durability properties of cementitious composites.…”

Section: Introductionmentioning

confidence: 99%

“…Also, most of the available studies have focused on plain OPC systems. It is widely agreed that seawater has an accelerating effect of cement hydration processes (Govindarajan and Gopalakrishnan 2011;Li et al 2018a;Younis et al 2018;Montanari et al 2019;Sikora et al 2019b) and contributes to a decrease in the setting time and workability of concrete (Etxeberria et al 2016b;Younis et al 2018;Li et al 2019;Teng et al 2019). Early strength improvement, as an effect of accelerated cement hydration, has been widely reported (Demir et al 2010;Wegian 2010;Otsuki et al 2012;Abdel-Magid et al 2016;Etxeberria et al 2016a;Li et al 2018a).…”

Section: Introductionmentioning

confidence: 99%

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The effects of seawater and nanosilica on the performance of blended cements and composites

Sikora

Lootens²,

Liard³

et al. 2020

Appl Nanosci

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This study investigates the effects of seawater and nanosilica (3% by weight of cement), on the fresh and hardened properties of cement pastes and mortars produced with two types of low heat cements: Portland pozzolana cement (CEM II) and blast furnace cement (CEM III). The heat of hydration, initial and final setting times, rheological properties, strength development, sorptivity and water accessible porosity of the cement pastes and mortars were determined. The data reveal that cement type has a significant effect on the reaction rate of cement with seawater and nanosilica (NS). Specimens produced with slag-blended cement exhibited a higher cement reaction rate and the composite produced exhibited better mechanical performance, as a result of the additional reaction of alumina rich phases in slag, with seawater. Replacement of freshwater with seawater contributes mostly to a significant improvement of early strength. However, in the case of slag-blended cement, 28 day strength also improved. The incorporation of NS results in additional acceleration of hydration processes, as well as to a decrease in cement setting time. In contrast, the addition of NS results in a noticeable increment in the yield-stress of pastes, with this effect being pronounced when NS is mixed along with seawater. Moreover, the use of seawater and NS has a beneficial effect on microstructure refinement, thus improving the transport properties of cement mortars. Overall, the study has showed that both seawater and NS can be successfully used to accelerate the hydration process of low heat blended cements and to improve the mechanical and transport properties of cement-based composites.Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Section: Resultsmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The effects of seawater and nanosilica on the performance of blended cements and composites

Sikora

Lootens²,

Liard³

et al. 2020

Appl Nanosci

View full text Add to dashboard Cite

show abstract

“…American Concrete Institute (ACI) suggests that any drinkable water is suitable for use in the concrete. Currently, the use of some types of water like seawater is prohibited because of the high content of chloride as the chloride of water intensifies the corrosion of reinforcing [9]. e concrete industries consume about one billion cubic meters of water annually.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, the investigation for replacement of other sources of water such as seawater [9], wastewater [10], underground water [12], and recycled water [13] has started. Some experimental work on compressive strength of concrete with 100% replacement of treated wastewater instead of tap water has been done.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Effect of Larestan’s Pipeline Water on the Mechanical Properties of Concretes Containing Granite Aggregates

Forsat

Mirjavadi

2019

Advances in Civil Engineering

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In this study, the compressive strength of the concretes made by the pipeline water of Larestan has been investigated. Although the used water for the concretes must be clean, standard, and generally drinkable water, in Larestan city, the pipeline water is nonpotable water; meanwhile, this type of water is still being used in the mixture of the concretes by companies and contractors. Since in the initial tests the compressive strength of the normal samples did not satisfy the standards, 50% of granite aggregate was replaced with the purpose of increasing strength of the samples. en four types of samples were made, which are (1) normal concrete with pipeline water, (2) normal concrete with potable water, (3) granite concrete with pipeline water, and (4) granite concrete with potable water. e results showed that the compressive strength of normal samples is not standard in the case of using the pipeline water. is issue can be seen during the first four weeks of the samples, whereas these samples are placed in the standard zone by replacing 50% of granite aggregate instead of normal aggregates. is may be attributed to the compensating effect of granite aggregates in opposition to damaging effect of water. Also, by using the granite aggregates in the mixture, the compressive strengths of the samples were standard and almost identical in both cases of pipeline water and tap water. As a result, the concretes made in this city must include additives for increasing the strength, or the tap water should be used as a replacement for pipeline water.

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Advanced Cementitious Composites

2022

Advanced Concrete Technology

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Fresh and hardened properties of seawater-mixed concrete

Cited by 252 publications

References 44 publications

The effects of seawater and nanosilica on the performance of blended cements and composites

The effects of seawater and nanosilica on the performance of blended cements and composites

Investigation of the Effect of Larestan’s Pipeline Water on the Mechanical Properties of Concretes Containing Granite Aggregates

Advanced Cementitious Composites

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