Characterization and Evaluation of Natural Zeolite as a Pozzolanic Material

Saraya, Mohamed El-Shahate Ismaiel; Thabet, Mohamed S.

doi:10.21608/absb.2018.33747

Cited by 3 publications

(4 citation statements)

References 51 publications

(60 reference statements)

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“…The strong bands at 3400 and 1630 cm −1 were assigned to vibration of the bonds O-H-O and the bending mode of water [44]. The band at 437 cm −1 was assigned to the bending vibration of O-Al-O and O-Si-O bonds [30,44]. Bands in the region 500-800 cm −1 are probably due to pseudo-lattice vibrations and show the nature of the channel cations [45].…”

Section: Discussion Of Characterization Resultsmentioning

confidence: 98%

“…It is clear that water has different absorption bands in zeolite materials. The strong bands at 3400 and 1630 cm −1 were assigned to vibration of the bonds O-H-O and the bending mode of water [44]. The band at 437 cm −1 was assigned to the bending vibration of O-Al-O and O-Si-O bonds [30,44].…”

Section: Discussion Of Characterization Resultsmentioning

confidence: 99%

“…All isotherms closely resemble type IV according to the International Union of Pure and Applied Chemistry (IUPAC) classification, which is characteristic of microporous and mesoporous materials. At a higher relative pressure (0.40 < P/Po < 0.95), the hysteresis loop in zeolite is larger than that of LDH, which suggests that zeolite contains a larger amount of mesopores and surface area than does LDH [44,47]. This was further ascertained by the BJH pore-size distribution plot (inset curves in Figures 6 and S2) which obviously demonstrated the attendance of mesopores with an average size of approximately 3.6 nm for Zn-Fe LDH, 3.71 for zeolite and 3.33 for zeolite/Zn-Fe LDH.…”

Section: Theta (Degree)mentioning

confidence: 98%

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LDH Nanocubes Synthesized with Zeolite Templates and Their High Performance as Adsorbents

et al. 2021

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In this work, the efficiency of the adsorptive removal of the organic cationic dye methylene blue (MB) from polluted water was examined using three materials: natural clay (zeolite), Zn-Fe layered double hydroxide (LDH), and zeolite/LDH composite. These materials were characterized via X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, high-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray (EDX) diffraction (XRF), low-temperature N2 adsorption, pore volume and average pore size distribution and field emission scanning electron microscopy (FE-SEM). The properties of the applied nanomaterials regarding the adsorption of MB were investigated by determining various experimental parameters, such as the contact time, initial dye concentration, and solution pH. In addition, the adsorption isotherm model was estimated using the Langmuir, Freundlich, and Langmuir–Freundlich isotherm models. The Langmuir model was the best-fitting for all applied nanomaterials. In addition, the kinetics were analyzed by using pseudo-first-order, pseudo-second-order, and intraparticle diffusion models, and the pseudo-second-order model was an apparent fit for all three applied nanomaterials. The maximum Adsorption capacity toward MB obtained from the materials was in the order zeolite/LDH composite > zeolites > Zn-Fe LDH. Thus, the zeolite/LDH composite is an excellent adsorbent for the removal of MB from polluted water.

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Section: Discussion Of Characterization Resultsmentioning

confidence: 98%

Section: Discussion Of Characterization Resultsmentioning

confidence: 99%

Section: Theta (Degree)mentioning

confidence: 98%

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LDH Nanocubes Synthesized with Zeolite Templates and Their High Performance as Adsorbents

et al. 2021

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“…The pozzolana is a siliceous and aluminous substance that has the ability to react with Ca(OH) 2 at ordinary temperatures for forming relatively stable components that have cementitious properties, and is commonly used to ameliorate the physico-chemical and mechanical characteristics of concrete and cement pastes 9 .…”

Section: Introductionmentioning

confidence: 99%

Valorification of Egyptian volcanic tuff as eco-sustainable blended cementitious materials

Eldahroty

Farghali

Shehata

et al. 2023

Sci Rep

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Rhyolite rocks extend from southern Egypt to northern Egypt in the Eastern Desert, and no effective economic exploitation of them has been discovered so far. The pozzolanic activities of different volcanic tuffs (VT) supplied from the Eastern Desert located in Egypt have been investigated as natural volcanic pozzolan materials to develop new green cementitious materials for achieving sustainability goals in the construction field. Experimentally in this paper, the pozzolanic activities of seven diverse specimens of Egyptian tuffs taken with standardized proportions of 75:25% (Cement: volcanic tuffs) were investigated. Pozzolanic features of such tuffs are examined comparatively via strength activity index (SAI), TGA, DTA, and the Frattini’s test. Chemical composition, petrographic, and XRD analysis were also performed for tuffs samples. The pozzolanic reaction degrees were determined according to the compressive strengths at 7, 28, 60 and 90 days with different replacement ratios (20, 25, 30 and 40%) of tuffs samples. Additionally, the micro-filler effects in mortar and concrete were determined by measuring the heat of hydration in mortar samples and the compressive strength of concrete with different additive ratios for tuffs samples besides, the concrete slump test. The results show that TF6 gives a lower cement heat of hydration value which is less than 270 J/g at 7 days. Also, its performance in concrete is better than silica fume at late strength (28 days) since the concrete index value is 106.2% by compared to the concrete index of silica fume 103.9 and therefore it can be used as an alternative to high price and quality variable silica fume (SF) for producing high-performance green concrete. Due to the good pozzolanic behavior proved by nearly most volcanic tuffs, along with their low cost, this study will be profitable for very auspicious the use of Egyptian volcanic tuffs for developing sustainable and eco‑friendly blended cement.

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Clean technology for sustainable development by geopolymer materials

Chola¹,

Parambil²,

Panakkal³

et al. 2022

Physical Sciences Reviews

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Geopolymer materials have captivated as a promising material for building restoration due to their environmentally sustainable nature as well as their potential to use a variety of waste products as precursors. Numerous industrial, municipal and agricultural wastes can be used to create environmentally acceptable, sustainable, structurally sound geopolymer matrices. These new generation materials, fabricated by following the geopolymerisation reactions of alumino-silicate oxides with alkali activators, have the advantages of high mechanical strength, corrosion resistance, durability, fire resistance etc., and can serve as a substitute for construction materials like Ordinary Portland Cement since they carry enormous impact on the environment. This review presents the importance of geopolymeric materials and their role in sustainable development giving special emphasis to kaolin, metakaolin, zeolite, fly ash, dolomite, red mud and clay based geopolymer materials.

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Characterization and Evaluation of Natural Zeolite as a Pozzolanic Material

Cited by 3 publications

References 51 publications

LDH Nanocubes Synthesized with Zeolite Templates and Their High Performance as Adsorbents

LDH Nanocubes Synthesized with Zeolite Templates and Their High Performance as Adsorbents

Valorification of Egyptian volcanic tuff as eco-sustainable blended cementitious materials

Clean technology for sustainable development by geopolymer materials

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