Durability performance of geopolymer ferrocement panels prepared by different alkaline activators

Ghazy, Mariam Farouk; Elaty, Metwally Abd Allah Abd; Taman, Mohamed; Eissa, Mohamed E.

doi:10.1016/j.istruc.2022.01.087

Cited by 12 publications

(6 citation statements)

References 39 publications

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“…Utilizing stainless steels, which possess high corrosion resistance but at increased cost, and employing cathodic protection have been demonstrated to be the most effective methods for ensuring the durability of both the steel and the isolation system in aggressive environments. Galvanization of steel provides a cheaper alternative, with positive impacts on corrosion protection when compared to other preventative techniques, though the passivating layer formed during galvanization is more sensitive to environmental pH (and benefits from the presence of Ca 2+ ). , Furthermore, in GPs, the large concentration of free alkalis in the pore solution may diminish the durability of the zinc-based passivation layer …”

Section: Factors Affecting the Properties Of Gpsmentioning

confidence: 99%

“…Galvanization of steel provides a cheaper alternative, with positive impacts on corrosion protection when compared to other preventative techniques, though the passivating layer formed during galvanization is more sensitive to environmental pH (and benefits from the presence of Ca 2+ ). 79,278 Furthermore, in GPs, the large concentration of free alkalis in the pore solution may diminish the durability of the zinc-based passivation layer. 257 Corrosion inhibitors are also a viable and cost-effective option for extending both the initiation time (by increasing the threshold value of chloride or decreasing the penetration depth of chloride) and the propagation time (by decreasing the overall rate of corrosion).…”

Section: Main Mechanisms Of Corrosionmentioning

confidence: 99%

Section: Factors Affecting the Properties Of Gpsmentioning

confidence: 99%

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Review on Geopolymers as Wellbore Sealants: State of the Art Optimization for CO₂ Exposure and Perspectives

et al. 2023

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Wellbores used in underground production and storage activities, including carbon capture and storage (CCS), are typically sealed using sealants based on Ordinary Portland Cement (OPC). However, leakage along these seals or through them during CCS operations can pose a significant threat to long-term storage integrity. In this review paper, we explore the potential of geopolymer (GP) systems as alternative sealants in wells exposed to CO 2 during CCS. First, we discuss how key parameters control the mechanical properties, permeability, and chemical durability of GPs based on different starting materials as well as their optimum values. These parameters include the chemical and mineralogical composition, particle size, and particle shape of the precursor materials; the composition of the hardener; the chemistry of the full system (particularly the Si/Al, Si/(Na+K), Si/Ca, Si/Mg, and Si/Fe ratios); the water content of the mix; and the conditions under which curing occurs. Next, we review existing knowledge on the use of GPs as wellbore sealants to identify key knowledge gaps and challenges and the research needed to address these challenges. Our review shows the great potential of GPs as alternative wellbore sealant materials in CCS (as well as other applications) due to their high corrosion durability, low matrix permeability, and good mechanical properties. However, important challenges are identified that require further research, such as mix optimization, taking into account curing and exposure conditions and available starting materials; the development of optimalization workflows, along with building larger data sets on how the identified parameters affect GP properties, can streamline this optimization for future applications.

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Section: Factors Affecting the Properties Of Gpsmentioning

confidence: 99%

Section: Main Mechanisms Of Corrosionmentioning

confidence: 99%

Section: Factors Affecting the Properties Of Gpsmentioning

confidence: 99%

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Review on Geopolymers as Wellbore Sealants: State of the Art Optimization for CO₂ Exposure and Perspectives

et al. 2023

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“…More resistance to reinforcement corrosion is achieved by using thicker steel mesh, mortar covers, and several layers in ferrocement panel specimens. Compared to the geopolymer (GP) mortar activated by potassium silicate, the sodium silicate (Na 2 SiO 3 ) activated FA based GP mortar displayed greater steel wire mesh passivation protection, as well as greater resistance to exposure to sodium sulphate and sulfuric acid [9]. In engineering exercise, using basalt fibre mesh increases the resistance of FGPC towards frost action and abrasion [10].…”

Section: Introductionmentioning

confidence: 99%

Durability Performance of Ferro Geo Polymer Concrete

Lalitha,

Sai Kishore

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The expansion of the building sector is ultimately driving up the manufacturing of Portland cement, which rises pollution. Consequence of this is global warming. Sustainable alternatives are being used in concrete on a large scale to minimise the impact of greenhouse gases. Concrete made of geo-polymers is one of such alternative. Since Geo Polymer Concrete (GPC) is inherently known for its resistance to aggressive environment, to add to its characteristics, steel wire mesh was incorporated into geo polymer concrete which can largely be termed as “Ferro Geo Polymer Concrete” (FGPC). In the current study, durability properties of FGPC such as resistance to acid attack, Half-Cell Potential (HCP) and resistance to abrasion have been studied. Welded square wire mesh has been used in the specimens with different number of layers. FGPC specimens were compared to GPC specimens of same grade without mesh. Double layered FGPC specimens have shown better resilience to acid attack having weight loss and strength loss of 0.44% and 17.24% when immersed in H2SO4 and 0.45% and 8.4% when immersed in HCL correspondingly. Double layered FGPC has better resistance towards abrasion of concrete with PWL of 2.43% and ADA of 1.07 mm.

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“…The corrosion behavior of geopolymer mortar prepared with different types of alumina silica-rich binders such as fly ash [24,138], metakaolin [24,139], slag [79], metakaolin and slag [140], zeolite [113], metakaolin and slag [141], red mud and slag [142], fly ash and slag [143], and fly ash and palm oil fuel ash [144].…”

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confidence: 99%

Scientometric Analysis of Global Research on the Utilization of Geopolymer Composites in Construction Applications

et al. 2023

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This study conducts a scientometric review on the use of geopolymer mortar and composites in different construction applications. It aims to analyze the findings of past research and reveal the research constituents, development trends, and knowledge gaps. The Scopus database was employed to retrieve the relevant publications, while Bibliometrix was used to conduct the statistical analyses. Results revealed a steady and gradual increase in the number of publications after 2013, as the annual growth rate increased from 23.9% to 45.2% between the timeframes 2003–2013 and 2014–2022, respectively. The analysis highlighted that many authors collaborated on different construction applications of geopolymers regardless of geographic location. Meanwhile, Construction and Building Materials, China, and Universiti Malaysia Perlis were found to be the predominant journal, country, and institution, respectively. The scientometric analysis showed that the most frequently investigated applications for geopolymer mortars and composites were fire resistance, corrosion protection, and repair. Research gaps highlighted that other applications are not as well investigated despite the promising performance of the geopolymer composites, including 3D printing, heavy metals absorption, environmental protection, and underwater applications. Future research is required to assess the use of other alumina and silica-rich binders in geopolymers while also exploring their lifecycle assessment and economic impact.

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Durability performance of geopolymer ferrocement panels prepared by different alkaline activators

Cited by 12 publications

References 39 publications

Review on Geopolymers as Wellbore Sealants: State of the Art Optimization for CO₂ Exposure and Perspectives

Review on Geopolymers as Wellbore Sealants: State of the Art Optimization for CO₂ Exposure and Perspectives

Durability Performance of Ferro Geo Polymer Concrete

Scientometric Analysis of Global Research on the Utilization of Geopolymer Composites in Construction Applications

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Durability performance of geopolymer ferrocement panels prepared by different alkaline activators

Cited by 12 publications

References 39 publications

Review on Geopolymers as Wellbore Sealants: State of the Art Optimization for CO2 Exposure and Perspectives

Review on Geopolymers as Wellbore Sealants: State of the Art Optimization for CO2 Exposure and Perspectives

Durability Performance of Ferro Geo Polymer Concrete

Scientometric Analysis of Global Research on the Utilization of Geopolymer Composites in Construction Applications

Contact Info

Product

Resources

About

Review on Geopolymers as Wellbore Sealants: State of the Art Optimization for CO₂ Exposure and Perspectives

Review on Geopolymers as Wellbore Sealants: State of the Art Optimization for CO₂ Exposure and Perspectives