Applicability of seawater as a mixing and curing agent in 4-year-old concrete

Dasar, Amry; Patah, Dahlia; Hamada, Hiroyuki; Sagawa, Yasutaka; Yamamoto, Daisuke

doi:10.1016/j.conbuildmat.2020.119692

Cited by 41 publications

(20 citation statements)

References 17 publications

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“…Nishida et al [44] observed that the initiation time was longer when slag was used to replace OPC. Similar results were obtained in the study by Otsuki et al [73], whilst Daser et al [76] did not observe any significant improvement using slag. According to Lollini et al [75,77] the use of fly ash in seawater-mixed concrete led to a slight increase of the initiation time, while according to Lim et al [34], fly ash did not significantly change the risk of corrosion.…”

Section: Corrosion and Alternative Reinforcementsupporting

confidence: 89%

“…Several studies have been carried out to evaluate the corrosion behavior of carbon steel in seawater-mixed concrete, both natural and artificial, exposed in an environment with or without further chloride penetration. Almost all studies agree that carbon steel in specimens made with seawater as mixing water were prone to corrosion when exposed to further chloride penetration (for instance, a sprayed environment of 3.0% NaCl solution at 50 °C [74], alternate wetting-drying cycles with seawater [13], accelerated sprayed chamber with 50 °C of 3% NaCl solution [47] or ponding with a 3.5% NaCl solution [75]), when the concrete cover thickness was low [34,44,73,75,76]. The use of SCMs can affect the penetration of chlorides and the corrosion initiation time, although it will not prevent corrosion.…”

Section: Corrosion and Alternative Reinforcementmentioning

confidence: 99%

“…For example, the use of cathodic prevention [81], as well as the use of corrosion inhibitors [82][83][84] were explored to enhance the durability of seawater concrete. Epoxy coated rebars have been also proposed in combination with seawater-mixed concrete [76], however the presence of defects or scratches might drastically impair their reliability.…”

Section: Corrosion and Alternative Reinforcementmentioning

confidence: 99%

See 2 more Smart Citations

A review of recent advances in the science and technology of seawater-mixed concrete

Ebead

Lau

Lollini

et al. 2022

Cement and Concrete Research

111

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Section: Corrosion and Alternative Reinforcementsupporting

confidence: 89%

Section: Corrosion and Alternative Reinforcementmentioning

confidence: 99%

Section: Corrosion and Alternative Reinforcementmentioning

confidence: 99%

See 1 more Smart Citation

A review of recent advances in the science and technology of seawater-mixed concrete

Ebead

Lau

Lollini

et al. 2022

Cement and Concrete Research

111

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“…Given the current freshwater stress and the future freshwater shortages, seawater has been a fit-for-purpose alternative mixing water for concrete production [21][22][23][24]. However, the applicability of seawater in concrete production is limited due to its high chloride content that induce corrosion of the reinforcing steel bars [25][26][27], although the corrosion potential can be reduced by using polymer-coated rebars [28]. It should be noted that pervious concrete is typically produced without reinforcing steel bars (commonly known as rebars), as opposed to ordinary concrete.…”

Section: Introductionmentioning

confidence: 99%

Fly Ash-Added, Seawater-Mixed Pervious Concrete: Compressive Strength, Permeability, and Phosphorus Removal

Hwang

Yeon

2022

Materials

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A mix proportion of off-spec fly ash (FA)-added, seawater-mixed pervious concrete (SMPC) was optimized for compressive strength and permeability and then the optimized SMPC was tested for the rate and extent of aqueous phosphorus removal. An optimum mix proportion was obtained to attain the percentages (% wt.) of FA-to-binder at 15.0%, nano SiO2 (NS)-to-FA at 3.0%, liquid-to-binder at 0.338, and water reducer-to-binder at 0.18% from which a 7-day compressive strength of 14.0 MPa and a permeability of 5.5 mm/s were predicted. A long-term maximum compressive strength was measured to be ~16 MPa for both the optimized SMPC and the control ordinary pervious concrete (Control PC). The phosphorus removal was favorable for both the optimized SMPC and the Control PC based on the dimensionless Freundlich parameter (1/n). Both the optimized SMPC and Control PC had a first-order phosphorus removal constant of ~0.03 h−1. The optimized SMPC had a slightly lower capacity of phosphorus removal than the Control PC based on the Freundlich constant, Kf (mg1−1/n kg−1 L1/n): 15.72 for the optimized SMPC vs. 16.63 for Control. This study demonstrates a cleaner production and application of off-spec FA-added, seawater-mixed pervious concrete to simultaneously attain water, waste, and concrete sustainability.

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“…Reference [3] was evaluate 6-years-old chloride contaminated mortar. Further, the utilization of mineral admixture on seawater mixed concrete has a positive effect on corrosion performance [4][5][6]. While as in [7] reported that compressive strength on seawater mixed concrete after 36-years-old were increased.…”

Section: Introductionmentioning

confidence: 99%

Effects of Mineral Admixture on Electrical Resistivity and Permeability of Chloride Contaminated Mortar

Patah¹,

Dasar²,

Hamada³

et al. 2021

Proceedings of the 4th International Conference on Sustainable Innovation 2020–Technology, Engineering and Agriculture (ICoSITE

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The corrosion of reinforced concrete mainly was caused by chloride contaminated. Kinds of mineral admixtures such as Fly Ash Type B (FA), Silica Fume Type A (SF), Metakaolin (MKP) and Blast Furnace Slag Type B (BB) are necessary to increase the corrosion resistance. The electrical resistivity and permeability were used on evaluating the effects of mineral admixture. The electrical resistivity and permeability of mortar were measured by using four Wenner probes and Torrent. The parameters in this study were mineral admixtures and water-to-binder ratios. Electrical resistivity and permeability of dried mortar at 91 days were studied and compared with compressive strength. According to the results, lower water/binder ratio concrete had higher resistivity than those with higher water/binder ratios. When cement was replaced by BBMKP, electrical resistivity increased fifteen times when compared to that of OPC mortar. Based on experimental results, a good relationship was obtained between results of compressive strength with electrical resistivity of mortar. The results of this study can be applied further to predict electrical resistivity of concrete when some mineral admixture with different water-to-binder ratio are provided.

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Applicability of seawater as a mixing and curing agent in 4-year-old concrete

Cited by 41 publications

References 17 publications

A review of recent advances in the science and technology of seawater-mixed concrete

A review of recent advances in the science and technology of seawater-mixed concrete

Fly Ash-Added, Seawater-Mixed Pervious Concrete: Compressive Strength, Permeability, and Phosphorus Removal

Effects of Mineral Admixture on Electrical Resistivity and Permeability of Chloride Contaminated Mortar

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