Synthesis of inorganic polymers using fly ash and primary lead slag

Onisei, Silviana; Pontikes, Yiannis; Gerven, Tom Van; Angelopoulos, G.N.; Velea, Teodor; Predicã, Vasile; Moldovan, Petru

doi:10.1016/j.jhazmat.2011.12.039

Cited by 129 publications

(73 citation statements)

References 36 publications

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“…E.-S. I. Saraya, E. El-Fadaly [34]. In addition, bands at around 772, 579, 537 and 439 cm −1 are related to Al-Si minerals [35].…”

Section: Compressive Strengthmentioning

confidence: 93%

Preliminary Study of Alkali Activation of Basalt: Effect of NaOH Concentration on Geopolymerization of Basalt

Saraya¹,

El-Fadaly²

2017

MSCE

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The main objective of this study is to examine the possibility of using fresh basalt powder in the preparation of geopolymer pastes. Four NaOH concentrations of 2.5, 5, 7.5 and 10 M were used to alkali activation of basalt. In addition, effect of curing temperature at ambient, 45˚C and 65˚C were studied. The geopolymer pastes were investigated using FTIR, XRD and SEM-EDS techniques as well as compressive strength up to 90 days. The results were shown the compressive strength of prepared geopolymer increased with concentration of alkali activator up to 90 days. On the other hand, the compressive strength of prepared geopolymer pastes were improved with increased curing temperature. The results showed that there was a change in the chemical and mineral structure, due to the reaction of the sodium hydroxide with the different minerals of the basalt. In addition, the Na/Al and Si/Al ratios were completely different from that of the raw basalt. The geopolymerization reactions occurred at the surface basalt and the unreacted basalt particles actually play a supporting role in the geopolymer properties.

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“…E.-S. I. Saraya, E. El-Fadaly [34]. In addition, bands at around 772, 579, 537 and 439 cm −1 are related to Al-Si minerals [35].…”

Section: Compressive Strengthmentioning

confidence: 93%

Preliminary Study of Alkali Activation of Basalt: Effect of NaOH Concentration on Geopolymerization of Basalt

Saraya¹,

El-Fadaly²

2017

MSCE

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“…Lead primary slag (SPb) were taken from former ROMPLUMB S.A. dump. There are not identified in our country work of primary lead slag valorization in cement matrix composites, but exist attempts referring to inorganic polymers [11]. The SPb used in this research was characterized by various content of lead (6.6% as PbO) and copper (4.6% CuO).…”

Section: Methodsmentioning

confidence: 99%

Practical Model of Cement Based Grout Mix Design, for Use into Low Level Radiation Waste Management

Radu¹,

Saca²,

Mazilu³

et al. 2015

Mathematical Modelling in Civil Engineering

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Abstract:The cement based grouts, as functional performance composite materials, are widely used for both immobilisation and encapsulation as well as for stabilization in the field of inorganic waste management. Also, to ensure that low level radioactive waste (LLW) are contained for storage and ultimate disposal, they are encapsulated or immobilized in monolithic waste forms, with cement -based grouts. The paper includes some research data referring to cement based grout mix design for use as encapsulating/immobilizing system for low level radioactive waste. The work includes cementbased-grout mix design method used practically into establishing of the optimum grout mix based on the water/cement ratio, cement/sand ratio in order to achieve application requiered values of fluidity, segregation resistance, shrinkage and mechanical strengths. These engineering grout characteristics present relevance for simulation experiments of radionuclide leaching from LLWcement grout encapsulation system.

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“…asymmetric stretching vibration and shifting tape reveals early dissolution of the solid material into a strong alkaline solution and the establishment of new products during geopolymerization. The new products generated from these events is an amorphous aluminosilicate phase [2] [13]. Absorption band at 664.34 cm -1 relating to the incorporation of AlO4 in the aluminosilicate caused by the formation of a new phase of amorphous zeolites [2].…”

Section: A Mineralogical and Structure Of Geopolymer Materialsmentioning

confidence: 99%

The Effect of Si/Al Ratio to Compressive Strength and Water Absorption of Ferronickel Slag-based Geopolymer

Mustofa

Pintowantoro

2017

IJPS

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Abstract Geopolymer material is inorganic polymers that are generally synthesized from aluminosilicate materials, such as ferronickel slag. In this study, synthesis of geopolymer material using NaOH 7 molar and Na2SiO3 solutions with different Si/Al ratio to make paste. Paste is molded in a metal mold with dimensions of 5x5x5 cm 3 , then released from the mold and heated in an oven at 80 °C for 24 hours. The specimens that have been heated further left at room temperature for 28 days and then tested for compressive strengthand water absorption. The results indicate a trend compressive strength increases and water absorption decreases with increasing the Si/Al ratio. The optimum condition is obtained when Si/Al ratio is 3.5. Keywordsferronikelslag, inorganic polymer, aluminosilicate material.

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Synthesis of inorganic polymers using fly ash and primary lead slag

Cited by 129 publications

References 36 publications

Preliminary Study of Alkali Activation of Basalt: Effect of NaOH Concentration on Geopolymerization of Basalt

Preliminary Study of Alkali Activation of Basalt: Effect of NaOH Concentration on Geopolymerization of Basalt

Practical Model of Cement Based Grout Mix Design, for Use into Low Level Radiation Waste Management

The Effect of Si/Al Ratio to Compressive Strength and Water Absorption of Ferronickel Slag-based Geopolymer

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