Fracture Behavior of Long Fiber Reinforced Geopolymer Composites at Different Operating Temperatures

Korniejenko, Kinga; Figiela, Beata; Ziejewska, Celina; Marczyk, Joanna; Bazan, Patrycja; Hebda, Marek; Choińska, Marta; Lin, Wei‐Ting

doi:10.3390/ma15020482

Cited by 16 publications

(5 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results at 50 °C revealed a considerable drop in bending strength for virtually all compositions, which is surprising given that geopolymers are advertised as materials designed to perform at high temperatures. For nearly all compositions, the test at low temperature (about 3 C) revealed an increase in bending strength [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Life Cycle Assessment of the Sustainability of Alkali-Activated Binders

et al. 2023

View full text Add to dashboard Cite

Limiting the consumption of nonrenewable resources and minimizing waste production and associated gas emissions are the main priority of the construction sector to achieve a sustainable future. This study investigates the sustainability performance of newly developed binders known as alkali-activated binders (AABs). These AABs work satisfactorily in creating and enhancing the concept of greenhouse construction in accordance with sustainability standards. These novel binders are founded on the notion of utilizing ashes from mining and quarrying wastes as raw materials for hazardous and radioactive waste treatment. The life cycle assessment, which depicts material life from the extraction of raw materials through the destruction stage of the structure, is one of the most essential sustainability factors. A recent use for AAB has been created, such as the use of hybrid cement, which is made by combining AAB with ordinary Portland cement (OPC). These binders are a successful answer to a green building alternative if the techniques used to make them do not have an unacceptable negative impact on the environment, human health, or resource depletion. The Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) software was employed for choosing the optimal materials’ alternative depending on the available criteria. The results revealed that AAB concrete provided a more ecologically friendly alternative than OPC concrete, higher strength for comparable water/binder ratio, and better performance in terms of embodied energy, resistance to freeze–thaw cycles, high temperature resistance, and mass loss due to acid attack and abrasion.

show abstract

Section: Introductionmentioning

confidence: 99%

Life Cycle Assessment of the Sustainability of Alkali-Activated Binders

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Geopolymers constitute a group of modern and continuously developed materials, fabricated during the geopolymerisation process and more precisely through alkaline activation of silica-aluminous starting materials [21]. The geopolymer term was invented by Davidovits in 1972, who described them as aluminosilicate, characterised by a three-dimensional structure and formed as a result of activation by means of an alkaline solution [22,23]. Besides their environmental friendliness, geopolymers exhibit up-and-coming properties, proving the possibility of widespread prospective application [24].…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Coal Gangue and/or Metakaolin-Based Lightweight Geopolymer with the Addition of Waste Glass

Ziejewska,

Bąk,

Hodor

et al. 2023

Materials

Self Cite

View full text Add to dashboard Cite

Massive amounts of deposited coal gangue derived from the mining industry constitute a crucial problem that must be solved. On the other hand, common knowledge about the recycling of glass products and the reuse of waste glass is still insufficient, which in turn causes economic and environmental problems. Therefore, this work investigated lightweight geopolymer foams manufactured based on coal gangue, metakaolin, and a mix of them to evaluate the influence of such waste on the geopolymer matrix. In addition, the effect of 20% (wt.) of waste glass on the foams was determined. Mineralogical and chemical composition, thermal behaviour, thermal conductivity, compressive strength, morphology, and density of foams were investigated. Furthermore, the structure of the geopolymers was examined in detail, including pore and structure thickness, homogeneity, degree of anisotropy, porosity with division for closed and open pores, as well as distribution of additives and pores using micro-computed tomography (microCT). The results show that the incorporation of waste glass increased compressive strength by approximately 54% and 9% in the case of coal-gangue-based and metakaolin-based samples, respectively. The porosity of samples ranged from 67.3% to 58.7%, in which closed pores constituted 0.3–1.8%. Samples had homogeneous distributions of pores and additions. Furthermore, the thermal conductivity ranged from 0.080 W/(m·K) to 0.117 W/(m·K), whereas the degree of anisotropy was 0.126–0.187, indicating that the structure of foams was approximate to isotropic.

show abstract

“…Geopolymers are called alkaline activated materials (due to the first phase of geopolymer formation), they are created by combining aluminosilicate materials with alkaline compounds, strongly basic sodium, potassium or acid phosphates [1,[8][9][10][11]. By adding various types of fibers, stabilizers or foaming agents, the properties of these materials can be successfully controlled [12,13]. The most commonly used materials for geopolymerization are fly ash, metakaolin, slags [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Influence of elevated temperatures on the mechanical properties of foamed geopolymer materials

Figiela

Korniejenko

Hebdowska-Krupa

2023

Materialwissenschaft Werkst

Self Cite

View full text Add to dashboard Cite

Current research focuses heavily on geopolymer concrete as possible applications for insulation materials. The aim of the research is to test the strength properties of lightweight geopolymer concrete after exposure to high temperatures. Waste material from the Wieczorek mine (Poland) was used to produce the foamed geopolymers. Alkaline activation took place by mixing the mine powder with an aqueous solution of sodium hydroxide combined with an aqueous sodium silicate with a concentration of 10 M. Prepared geopolymer samples after temperature curing at 75 °C for 24 hours in a laboratory dryer, they were seasoned for 28 days, after which the strength properties were determined. Mechanical tests: compressive strength and bending strength were carried out at temperatures: 20 °C, 200 °C, 600 °C, 800 °C, 1100 °C. Research has shown the precursor activation with the presence of hydrogen peroxide enabled the manufacturing of foamed geopolymers. Heating in the temperature range up to 1100 °C influenced, to some extent, the total porosity of the tested foams. The geopolymer foams based on coal gangue present stable mechanical properties in the range up to 800 °C. No sharp mechanical performances decrease or material chipping was observed. Only colour change of heated samples occurred.

show abstract

Fracture Behavior of Long Fiber Reinforced Geopolymer Composites at Different Operating Temperatures

Cited by 16 publications

References 44 publications

Life Cycle Assessment of the Sustainability of Alkali-Activated Binders

Life Cycle Assessment of the Sustainability of Alkali-Activated Binders

Eco-Friendly Coal Gangue and/or Metakaolin-Based Lightweight Geopolymer with the Addition of Waste Glass

Influence of elevated temperatures on the mechanical properties of foamed geopolymer materials

Contact Info

Product

Resources

About