Microbial damage mitigation strategy in cementitious materials exposed to calcium chloride

Ksara, Maissoun; Newkirk, Rayna; Langroodi, Saeed Keshani; Althoey, Fadi; Sales, Christopher M.; Schauer, Caroline L.; Farnam, Yaghoob

doi:10.1016/j.conbuildmat.2018.10.033

Cited by 15 publications

(4 citation statements)

References 37 publications

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“…Although the precise source of Ca 2+ ions used by the bacteria during self-healing is unclear, it has been proposed that calcium hydroxide is likely to be the most important source [22].…”

Section: Introductionmentioning

confidence: 99%

Effect of carbonation on bacteria-based self-healing of cementitious composites

Tan

Reeksting

Ferrándiz-Mas

et al. 2020

Construction and Building Materials

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“…Although the precise source of Ca 2+ ions used by the bacteria during self-healing is unclear, it has been proposed that calcium hydroxide is likely to be the most important source [22].…”

Section: Introductionmentioning

confidence: 99%

Effect of carbonation on bacteria-based self-healing of cementitious composites

Tan

Reeksting

Ferrándiz-Mas

et al. 2020

Construction and Building Materials

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“…The explanation for that, these two chemical compounds can affect the cell membrane permeability of bacteria. Interestingly, pervious work has also explained that CaCl2 makes bacterial cell wall negatively charged, and then reacts with the carbonate ions, which creates the calcium carbonate on the bacteria cell surface (Ksara et al, 2019). This could explain how these compounds increase the potency of antibiotics against different bacteria.…”

Section: Discussionmentioning

confidence: 99%

Approach to enhance antibiotics efficiency towards uropathogenic bacteria

Mohsin¹,

Al-Shamarti²,

Abbas³

et al. 2020

MJM

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Aims: Urinary tract infection (UTI) is a common infection caused by many virulent bacteria. Multidrug resistance (MDR) by bacteria represents a major therapeutic challenge worldwide. MRD bacteria have different mechanisms to avoid antibiotics; one of them is horizontal gene transfer. Such genes, encoding antimicrobial resistance, are easily transferred from one bacterium to another. Magnesium and calcium chloride (MgCl2 and CaCl2) have an effect on the permeability of bacterial cell membrane. We aimed these chemical materials could increase the antibiotics efficiency on multidrug resistance bacteria. 250 UTI specimens were collected to isolate multidrug resistant bacteria. Depending on antibiotics resistance, we selected three species of virulent bacteria: Escherichia coli, Staphylococcus aureus and Proteus mirabilis. Then, we tested the effect of MgCl2 and CaCl2 on their antibiotics resistance. Methodology and results: The results showed that percentage of E. coli in UTI infection is the highest (45%), while Enterococcus faecalis is the lowest (3%). The effect of MgCl2 and CaCl2 on bacterial antibiotics resistance has been tested using different types of antibiotics. The findings showed that MgCl2 has significant effect to aid antibiotics against bacteria. In particular, nalidixic acid has shown more efficiency against E. coli and S. aureus but not P. mirabilis. Using different concentrations of CaCl2 increased the efficiency of gentamycin, amoxicillin and trimethoprim against S. aureus, while has increased the efficiency of ampicillin and nalidixic acid against E. coli. However, CaCl2 has no effect on the efficiency of antibiotics against P. mirabilis. In addition, MgCl2, and CaCl2 had no toxic effects in both T24 and 5637 urinary bladder cell lines. Finally, plasmids were isolated from these species to detect any antimicrobial resistance gene such as qnr-A. Conclusion, significance and impact of study: MDR distribution in the worldwide was increased, we highly recommend the avoidance of the random antibiotic usages. The salts CaCl2 and/or MgCl2 can be used at specific concentration to enhance the antibiotics permeability and therefore to decrease the antibiotic resistance.

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“…Damage and associated phase changes in specimens were monitored using longitudinal guarded comparative calorimeter geared (LGCC) and acoustic emission (AE). The detailed experimental procedures of the LGCC setup are mentioned elsewhere [26][27][28][29][30][31][32][33][34][35]. Low-temperature X-ray diffraction (LT-XRD) was employed to discover and define chemical phase transformations within the heat-cool cycling.…”

Section: Methodsmentioning

confidence: 99%

Deterioration in concrete exposed to sodium chloride and heat-cool cycling

Althoey

Farnam

et al. 2022

MATEC Web Conf.

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Many infrastructure domains required material research as an initial phase of project development life cycle. One such futuristic domain is bridge engineering, where there is a critical need of study of environmental impact and material strength. This paper focuses on the premature deterioration of concrete infrastructures exposed to sodium chloride (NaCl) salts in the presence of thermal cycling. NaCl salts can cause damage and rapid deterioration of concrete due to physical and chemical aspects, including salt scaling, corrosion of rebars, ice and salt crystallizations and/or deleterious chemical reactions. This paper discusses how NaCl solutions can cause damage in concrete in the presence of thermal cycling and how such damage can be mitigated. This paper at-tempts to provide an advanced thermo-chemo-physical understanding of NaCl salt damage in concrete. This paper also discusses specific structural and chemical alterations during thermal cycling that are caused by NaCl to develop damage to concrete. Results indicates that the heat-cool cycling induces the formation of mirabilite (Na2SO4.10H2O) in concrete exposed to high concentrations of NaCl solution. The mirabilite formation is found to be due to the release of sulfate ions from the concrete matrix.

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Microbial damage mitigation strategy in cementitious materials exposed to calcium chloride

Cited by 15 publications

References 37 publications

Effect of carbonation on bacteria-based self-healing of cementitious composites

Effect of carbonation on bacteria-based self-healing of cementitious composites

Approach to enhance antibiotics efficiency towards uropathogenic bacteria

Deterioration in concrete exposed to sodium chloride and heat-cool cycling

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