Pozzolanic Reaction of a Biomass Waste as Mineral Addition to Cement Based Materials: Studies by Nuclear Magnetic Resonance (NMR)

Martínez-Ramírez, S.; Frías, Moisés; Nakanishi, Erika Yukari; Savastano, Holmer

doi:10.1186/s40069-019-0342-3

Cited by 9 publications

(5 citation statements)

References 29 publications

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“…These results suggest that the C–S–H phase would recrystallize into β‐wollastonite at temperatures above 500°C. The single Q 0 and Q 4 peaks were due to the formation of β‐C 2 S and quartz, 48 which is consistent with the XRD results.…”

Section: Resultssupporting

confidence: 86%

Temperature effects on local structure, phase transformation, and mechanical properties of calcium silicate hydrates

Jee

Suh

et al. 2021

J Am Ceram Soc

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This study aims to elucidate the effect of heating on the local atomic arrangements, structure, phase transformation, and mechanical properties of synthesized calcium–silicate–hydrate (C–S–H). The alteration in the atomic arrangement of the synthesized C–S–H (Ca/Si =0.8) and the formation of crystalline phases that occurred in three distinct transformation stages of dehydration (105°C–200°C), decomposition (300°C–600°C), and recrystallization (700°C–1000°C) were investigated via powder X‐ray diffraction, 29Si nuclear magnetic resonance spectroscopy, and thermogravimetric analysis. Further, the deformation of the local atomic bonding environment and variations in mechanical properties during the three stages were assessed via pair distribution function analysis based on in‐situ total X‐ray scattering. The results revealed that the C–S–H paste before heating exhibited a lower elastic modulus in real space than that in the reciprocal space in the initial loading stage because water molecules acted as a lubricant in the interlayer. At the dehydration stage, the strain as a function of external loading exhibited irregular deformation owing to the formation of additional pores induced by the evaporation of free moisture. At the decomposition stage, the structural deformation of the main d‐spacing (d ≈ 3.0 Å) was similar to that of the real space before the propagation of microcracks. At the recrystallization stage, the elastic modulus increased to 48 GPa owing to the thermal phase transformation of C–S–H to crystalline β‐wollastonite. The results provide direct experimental evidence of the microstructural and nanostructural deformation behavior of C–S–H pastes after exposure to high temperature under external loading.

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Section: Resultssupporting

confidence: 86%

Temperature effects on local structure, phase transformation, and mechanical properties of calcium silicate hydrates

Jee

Suh

et al. 2021

J Am Ceram Soc

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“…It is shown that the GG contained 40% C, 1.3% N, and 5.1% ash. The ash content was well within the range reported for other grass species, such as Elephant grass [37], Camel grass (6.31%) [38], and Echinochloa stagnina (6.31%) [23], as well as other biomass wastes, such as jackfruit peel (5.56%) and seeds (6.64%) [39]. In comparison to low-rank coals, the lower ash content of biomass makes it more suitable for combustion processes [39].…”

Section: Characterization Of Guinea Grasssupporting

confidence: 74%

Study on Combustion Characteristics and Thermodynamic Parameters of Thermal Degradation of Guinea Grass (Megathyrsus maximus) in N2-Pyrolytic and Oxidative Atmospheres

et al. 2021

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This study provides an extensive investigation on the kinetics, combustion characteristics, and thermodynamic parameters of the thermal degradation of guinea grass (Megathyrsus maximus) in N2-pyrolytic and oxidative atmospheres. A model-fitting technique and three different iso-conversional techniques were used to investigate the kinetics of the thermal process, after which an analysis of the combustion characteristics and thermodynamic parameters was undertaken. Prior to this, experiments on the physico-chemical characterization, thermogravimetric, and spectroscopic analyses were carried out to provide insight into the compositional structure of the guinea grass. The volatile matter, fixed carbon, and total lignin contents by mass were 73.0%, 16.1%, and 21.5%, respectively, while the higher heating value was 15.46 MJ/kg. The cellulose crystallinity index, determined by XRD, was 0.43. The conversion of the GG in air proceeded at a relatively much higher rate as the maximum mass-loss rate peak in a 20 K/min read was −23.1 and −12.3%/min for the oxidative and the pyrolytic, respectively. The kinetics investigation revealed three distinctive stages of decomposition with their corresponding values of activation energy. The average values of activation energy (FWO) at the latter stages of decomposition in the pyrolytic processes (165 kJ/mol) were higher than those in the oxidative processes (125 kJ/mol)—an indication of the distinctive phenomenon at this stage of the reaction. The Coats–Redfern kinetic model revealed that chemical reactions and diffusional models played a predominant role in the thermal decomposition process of the GG. This study showed that the thermodynamic parameters varied with the conversion ratio, and the combustion performance increased with the heating rates. The use of GG as an energy feedstock is recommended based on the findings from this work.

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“…In addition, plant waste has been used in construction based on tests making mortar with waste from Pinus caribaea (Stancato, Burke, & Beraldo, 2005) as a mineral additive to partially replace cement from the biomass residue of sugarcane (Anjos et al, 2013) and complementary cementation material resulting from the calcination of elephant grass biomass (Martínez Ramírez et al, 2019). The quality of the concrete is related to the quality of the aggregates used, and the concrete is based on the dosed and homogeneous mixture between aggregates, cement and water (Silva et al, 2022).…”

Section: Resultsmentioning

confidence: 99%

Plant Waste in the Production of New Materials in Brazil: A Scientometric Analysis from 19912021

Melo¹,

Santos²,

Ribeiro³

et al. 2023

JMS

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Several plant residues can be generated during the stages of industrial processing, such as fruit peel, seeds and bagasse, and these can give rise to high-value products. The management and use of this waste is of global interest. The aim of this study was to evaluate the spatio-temporal evolution of scientific knowledge on the reuse of agroindustrial waste generated in Brazil through a scientometric analysis. To this end, a search was performed in the databases Scopus, Scielo, and Web of Science between the years 1991and 2021. The words used as indexers were agribusiness waste, vegetable waste, fruit waste, biomass waste, plant residue, and chemical characterization. The following selection criteria were adopted: search of indexers by title, scientific articles, articles in English and Portuguese, and articles on plant waste generated in Brazil. There was an increase in publications over the years, with a greater number of studies (21.46%) in the chemistry area, addressing mainly the physical-chemical characterization of materials. In Brazil, sugarcane (Saccharum officinarum L.) was the most studied species with a view to reusing its residues. We identified species from highly threatened Brazilian biomes, such as the Atlantic Forest and Cerrado, with the potential for transformation into new materials. The gaps in knowledge, evidenced in this analysis, suggest that more studies should be carried out on residues of native plant species which impact local communities. In particular, studies could focus on applicability in health and cosmetics, which are promising areas for plant materials and still little investigated.

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Pozzolanic Reaction of a Biomass Waste as Mineral Addition to Cement Based Materials: Studies by Nuclear Magnetic Resonance (NMR)

Cited by 9 publications

References 29 publications

Temperature effects on local structure, phase transformation, and mechanical properties of calcium silicate hydrates

Temperature effects on local structure, phase transformation, and mechanical properties of calcium silicate hydrates

Study on Combustion Characteristics and Thermodynamic Parameters of Thermal Degradation of Guinea Grass (Megathyrsus maximus) in N2-Pyrolytic and Oxidative Atmospheres

Plant Waste in the Production of New Materials in Brazil: A Scientometric Analysis from 19912021

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