Strength Parameters of Foamed Geopolymer Reinforced with GFRP Mesh

Krzywoń, Rafał; Dawczyński, Szymon

doi:10.3390/ma14030689

Cited by 13 publications

(4 citation statements)

References 52 publications

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“…Wongkvanklom et al [ 74 ] investigated the impact of foam content on mechanical, thermal, and sound properties of foamed concrete made with 15 M NaOH solution, sodium silicate/NaOH ratio (NS/NaOH) of 1.00, sand/ash ratio of 1.25, liquid/fly ash ratio of 0.4. Similarly to ordinary concrete, there is a possibility of cracking [ 75 ] under the influence of the acting load (low tensile strength) and, as a result, the need to strengthen, e.g., by using fibers [ 76 , 77 , 78 , 79 , 80 ], CFRP [ 79 ], or mesh [ 80 ]. Moreover, in recent years, FC has been used extensively in various areas of construction around the world, such as in Germany, Great Britain, USA, Canada, and Brazil [ 81 , 82 , 83 ].…”

Section: Characteristics Of Tested Materials and Used Methodsmentioning

confidence: 99%

Experimental and Numerical Verification of the Railway Track Substructure with Innovative Thermal Insulation Materials

et al. 2021

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The article aims to present the modified structural composition of the sub-ballast layers of the railway substructure, in which a part of the natural materials for the establishment of sub-ballast or protective layers of crushed aggregate is replaced by thermal insulation and reinforcing material (layer of composite foamed concrete and extruded polystyrene board). In this purpose, the experimental field test was constructed and the bearing capacity of the modified sub-ballast layers’ structure and temperature parameters were analyzed. A significant increase in the original static modulus of deformation on the surface of composite foamed concrete was obtained (3.5 times and 18 times for weaker and strengthen subsoil, respectively). Based on real temperature measurement, it was determined the high consistency of the results of numerical analyses and experimental test (0.002 m for the maximum freezing depth of the railway line layers and maximum ±0.5 °C for temperature in the railway track substructure–subsoil system). Based on results of numerical analyses, modified railway substructure with built-in thermal insulating extruded materials (foamed concrete and extruded polystyrene) were considered. A nomogram for the implementation of the design of thicknesses of individual structural layers of a modified railway sub-ballast layers dependent on climate load, and a mathematical model suitable for the design of thicknesses of structural sub-ballast layers of railway line were created.

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Section: Characteristics Of Tested Materials and Used Methodsmentioning

confidence: 99%

Experimental and Numerical Verification of the Railway Track Substructure with Innovative Thermal Insulation Materials

et al. 2021

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“…polypropylene [22,144], polyvinyl alcohol [142], and carbon [41]) or inorganic (e.g. basalt [142,145], steel [22,39], glass [115,146]). However, due to an increasing environmental concern, the use of natural fibers as reinforcement has grown, responding to the need to develop cost-effective, friendly, and renewable materials.…”

Section: Effect Of Natural Fibers Reinforcement On the Properties Of ...mentioning

confidence: 99%

Geopolymer composites reinforced with natural Fibers: A review of recent advances in processing and properties

TANANE,

Moujoud,

Ousaleh

et al. 2024

Preprint

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The construction sector is a significant contributor to global greenhouse gas emissions, resource depletion, and environmental degradation. Therefore, sustainable development in the construction sector is essential to reduce its environmental impact. Geopolymer materials have attracted particular attention offering technical properties similar to those of Portland cementitious materials with a much lower CO 2 emission and lower environmental impact. Their use as clean insulating materials seems promising due to their excellent thermal and mechanical properties. Moreover, natural fibers, such as bamboo, flax, hemp, and jute, can be used as reinforcement within the geopolymer matrix, providing additional benefits such as improved tensile and flexural strength, reduced density, and improved thermal and acoustic insulation properties. Hence, this review paper aims to explore the raw materials and manufacturing conditions involved in the formation of compact and porous geopolymer materials. In addition, the various factors affecting the properties of geopolymer materials are critically discussed and compared with those of Portland cementitious materials. Moreover, the impact of many variables, including fiber size, fiber orientation, and fiber content on the performance of natural fiber-reinforced geopolymer composites are highlighted, providing insights for future research developments.

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“…Samples with wider average pore size show poorer compressive strength but may exhibit superior thermal insulation capacity if they have higher porosity. As previously described, geopolymer foams with lower pore connectivity generally have superior strength and low thermal conductivity, making them suitable for construction [ 7 , 8 ], thermal barrier [ 9 , 10 , 11 ], and sound insulation [ 12 , 13 ]. With improved pore connectivity, the porosity and specific surface area of geopolymer foams increase accordingly.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Performance Evaluation of Metakaolin-Based Geopolymer Foams Obtained by Adding Palm Olein as the Foam Stabilizer

Wang

et al. 2022

Materials

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Geopolymer foams with different pore structures can be used in construction, water treatment, and heavy metal adsorption. The preparation of high porosity geopolymer foams using vegetable oil as a foam stabilizer is a feasible and cost-effective route. In this study, metakaolin-based geopolymer foams with hierarchical pore structures were fabricated by adding H2O2 as the foaming agent with palm olein as the foam stabilizer. The effects of H2O2 and palm olein content on the chemical features and pore structure of geopolymer foams were evaluated. Water absorption, thermal conductivity, and mechanical behaviors of geopolymer foams were also investigated. The results indicate that fatty acid salt surfactants were generated in situ in the geopolymer matrix due to the addition of palm olein. Geopolymer foams with H2O2 and palm olein addition possess a homogeneously concentrated macropore distribution. Palm olein exhibits a refining effect on intrinsic pores formed by geopolymerization. In addition, using appropriate amounts of palm olein and H2O2, geopolymer foams can achieve higher open porosity and better pore connectivity, resulting in the improvement of water absorption and thermal insulation capacity.

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Strength Parameters of Foamed Geopolymer Reinforced with GFRP Mesh

Cited by 13 publications

References 52 publications

Experimental and Numerical Verification of the Railway Track Substructure with Innovative Thermal Insulation Materials

Experimental and Numerical Verification of the Railway Track Substructure with Innovative Thermal Insulation Materials

Geopolymer composites reinforced with natural Fibers: A review of recent advances in processing and properties

Characterization and Performance Evaluation of Metakaolin-Based Geopolymer Foams Obtained by Adding Palm Olein as the Foam Stabilizer

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