Fiber reinforced alkali-activated stone wool composites fabricated by hot-pressing technique

Nguyen, Hoang; Kaas, Alexandra; Kinnunen, Päivö; Carvelli, Valter; Monticelli, Carol; Yliniemi, Juho; Illikainen, Mirja

doi:10.1016/j.matdes.2019.108315

Cited by 22 publications

(20 citation statements)

References 37 publications

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“…The physical and mechanical properties of the fiber are detailed in Table 2. The fiber volume fraction of 2% and mix composition were used as adopted in the previous study [4]. The mix recipes of plain and reinforced compositions are shown in Table 3.…”

Section: Oxide Compositionmentioning

confidence: 99%

“…The pressing temperatures were chosen to be quite lower than the onset of PVA degradation (i.e., roughly 180 ° C [18]), and after preliminary measurements with several coupling of pressing time and temperature. The two temperatures, here adopted, have been selected giving the best quasi-static mechanical performance [4].…”

Section: Mixturementioning

confidence: 99%

“…Such interaction at micro scale of the matrix and the reinforcement, as well as the microstructure and reaction product of the hot-pressed AAMs, was studied in Ref. [4] for the same composites. A schematic overview of the fibers role during impact is[Instruction: Add the following sentence after "...is depicted in Fig.…”

Section: Curingmentioning

confidence: 99%

“…Despite the high mechanical properties, similar to other cementitious materials, hot-pressed AAMs exhibit brittle behavior leading to sudden failures. As a remedy, the previous study showed that incorporation of the polyvinyl alcohol (PVA) fiber leads to a significant enhancement in the quasi-static mechanical performance of the hot-pressed alkaliactivated stone wool composites with deflection hardening behavior [4]. However, due to the brittleness of the material, it is important not only to investigate the material properties under quasi-static loading conditions but also the responses of material at dynamic loading.…”

Section: Introductionmentioning

confidence: 99%

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Low-velocity impact of hot-pressed PVA fiber-reinforced alkali-activated stone wool composites

Carvelli

Veljkovic

Nguyen

et al. 2020

Cement and Concrete Composites

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This study evaluates the effects of the manufacturing process and fiber reinforcement on low-velocity impact response of the recently developed PVA fiber-reinforced alkali-activated stone wool composites. To this end, reinforced and unreinforced specimens manufactured by hot-pressing were compared with those oven curing. The results revealed a similar impact response for the hot-pressed composite produced at 120 ° C for 3 h and its counterpart cured at ambient pressure at 60 ° C oven for 24 h. Furthermore, fiber reinforcement significantly improves the impact resistance of the hot-pressed composites showing about a 50% increase in peak load and a 40% reduction in penetration compared to the unreinforced materials. In view of the development of the hot-pressed composites and potential applications, accurate predictive models are of extremely importance, hence the material mechanical behavior was here simulated by adopting the concrete damage plasticity model to predict the low-velocity impact response of both unreinforced and reinforced materials and successfully verified for the scaling-up purpose.

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Section: Oxide Compositionmentioning

confidence: 99%

Section: Mixturementioning

confidence: 99%

Section: Curingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Low-velocity impact of hot-pressed PVA fiber-reinforced alkali-activated stone wool composites

Carvelli

Veljkovic

Nguyen

et al. 2020

Cement and Concrete Composites

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“…Casas-Ledón Y. et al [10] studies on environmental issues related to the manufacture of new insulation materials (panels) made from eucalyptus bark fibers showed their lower embodied energy and carbon emissions than traditional insulation materials. Nguyen H. et al [11] investigated the greenhouse gas emissions and embodied energy of fiber-reinforced alkali-activated asbestos composites, and suggested that the production process at 120 • C for 2 hours is the best way attaining balance among energy spent, mechanical properties, and CO 2 footprint. The second is to study the environmental performance of building materials at other stages of the life cycle based on the entire building [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Evaluation Model of Environmental Impacts of Insulation Building Envelopes

et al. 2020

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Energy consumption during use is the focus of insulation envelope design, but the environmental impact of other stages in the entire life cycle of building envelopes should be of equal concern. In this paper, a model has been developed based on the life-cycle environmental assessment for calculating the environmental impacts of building envelopes. The model proposed will be useful to evaluate the environmental performance of various envelopes to optimize the design of energy-saving envelopes. Consequently, lots of experiments are conducted for environmental impact assessment and analysis for external windows and filler walls with energy-savings in heating areas of China. Four conclusions can be drawn from the analysis. (1) K of building envelope is the design parameter of the greatest impact on environmental performance and has a critical value, which is the value that has the smallest environmental impact over the entire life cycle. (2) The importance of the environmental impact of the building envelope during the life cycle stages is as follows: usage > production > transportation > disposal > construction. The construction process of the thermal insulation wall could be negligible. (3) The choice of regional building materials should consider the distance of transportation, which may be the key factor determining its life cycle environmental performance. (4) Aerated concrete EPS walls and wooden windows are the first choices for envelope construction from the environmental impact throughout the life cycle.

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In‐plane and in‐depth frontal polymerization behaviors of continuous fiber‐reinforced epoxy composites

Luo,

Fu,

Zhu

et al. 2023

Polymer Composites

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Frontal polymerization (FP) is a self‐sustaining reaction that relies on polymerization exothermicity and heat transfer. This study explores the in‐plane and in‐depth FP mechanisms of continuous fiber‐reinforced epoxy composites. First, the effects of initiator and diluent concentrations on the FP behaviors of neat epoxy resins were examined. It was found that the frontal velocity and frontal temperature of the neat resins increase with an increase of either the initiator concentration or the diluent content, depending on the polymerization enthalpy and curing kinetics. Then, the FP behaviors of continuous carbon fiber and glass fiber‐reinforced epoxy woven composites were investigated. The results showed that the in‐plane FP behavior of the composites was primarily controlled by the thermal conductivity and specific heat capacity of the continuous fibers, whereas the in‐depth FP behavior mainly depended on the pores of the woven fabrics.Highlights Frontal velocity and temperature of neat resins are controlled by the polymerization enthalpy and curing kinetics. The in‐plane FP behavior of continuous fiber reinforced composites is dependent on the thermal conductivity and specific heat capacity of the fibers. The in‐depth FP behavior of composite is determined by both the thermal conductivity of fibers and the pores of fabrics.

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Fiber reinforced alkali-activated stone wool composites fabricated by hot-pressing technique

Cited by 22 publications

References 37 publications

Low-velocity impact of hot-pressed PVA fiber-reinforced alkali-activated stone wool composites

Low-velocity impact of hot-pressed PVA fiber-reinforced alkali-activated stone wool composites

Evaluation Model of Environmental Impacts of Insulation Building Envelopes

In‐plane and in‐depth frontal polymerization behaviors of continuous fiber‐reinforced epoxy composites

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