Characteristic Behavior of Hydration of Magnesium Oxide

Sang Hoon Park, Seung min Jeon, Jaewon Jang

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

A refractory brick is made of heat-resistance material which is mainly magnesium oxide (MgO). The used refractory material can be used for reclamation. But the magnesium oxide which is the main component in refractory blocks tends to be hydrated, resulting in magnesium hydroxide (Mg(OH2)). The hydration from MgO to Mg(OH2) is associated with volume expansion. In the study, a new equipment is developed to accelerate the hydration process and measure volume expansion and expansion pressure. X-ray Diffraction (XRD) and scanning electron microscope (SEM) was adopted to investigate further the hydration process. In this study, disk-shaped refractory materials were used to measure the volume expansion under a given confining stress condition such as 60 kPa, 263 kPa, and 5.94 MPa. And the expansion pressure was also measured under no volume expansion condition. The results show that the volume expansion reaches 380% for 60 kPa and 263 kPa confining stress condition, and 255% for 5.94 MPa confining stress condition. The expansion pressure can reach over 6.5 MPa. The results of this study are applicable to various engineering applications of refractory materials.

Original languageEnglish
Title of host publicationLecture Notes in Civil Engineering
PublisherSpringer
Pages1275-1279
Number of pages5
DOIs
StatePublished - 2020 Jan 1

Publication series

NameLecture Notes in Civil Engineering
Volume62
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Fingerprint

Magnesia
Hydration
Refractory materials
Reclamation
Brick
Heat resistance
Magnesium
Electron microscopes
Scanning
X ray diffraction

Keywords

  • Expansion force
  • Expansion pressure
  • Hydration
  • Magnesium oxide
  • Refractory materials

Cite this

Park, S. H., Jeon, S. M., & Jang, J. (2020). Characteristic Behavior of Hydration of Magnesium Oxide. In Lecture Notes in Civil Engineering (pp. 1275-1279). (Lecture Notes in Civil Engineering; Vol. 62). Springer. https://doi.org/10.1007/978-981-15-2184-3_168
Park, Sang Hoon ; Jeon, Seung min ; Jang, Jaewon. / Characteristic Behavior of Hydration of Magnesium Oxide. Lecture Notes in Civil Engineering. Springer, 2020. pp. 1275-1279 (Lecture Notes in Civil Engineering).
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Park, SH, Jeon, SM & Jang, J 2020, Characteristic Behavior of Hydration of Magnesium Oxide. in Lecture Notes in Civil Engineering. Lecture Notes in Civil Engineering, vol. 62, Springer, pp. 1275-1279. https://doi.org/10.1007/978-981-15-2184-3_168

Characteristic Behavior of Hydration of Magnesium Oxide. / Park, Sang Hoon; Jeon, Seung min; Jang, Jaewon.

Lecture Notes in Civil Engineering. Springer, 2020. p. 1275-1279 (Lecture Notes in Civil Engineering; Vol. 62).

Research output: Chapter in Book/Report/Conference proceedingChapter

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AB - A refractory brick is made of heat-resistance material which is mainly magnesium oxide (MgO). The used refractory material can be used for reclamation. But the magnesium oxide which is the main component in refractory blocks tends to be hydrated, resulting in magnesium hydroxide (Mg(OH2)). The hydration from MgO to Mg(OH2) is associated with volume expansion. In the study, a new equipment is developed to accelerate the hydration process and measure volume expansion and expansion pressure. X-ray Diffraction (XRD) and scanning electron microscope (SEM) was adopted to investigate further the hydration process. In this study, disk-shaped refractory materials were used to measure the volume expansion under a given confining stress condition such as 60 kPa, 263 kPa, and 5.94 MPa. And the expansion pressure was also measured under no volume expansion condition. The results show that the volume expansion reaches 380% for 60 kPa and 263 kPa confining stress condition, and 255% for 5.94 MPa confining stress condition. The expansion pressure can reach over 6.5 MPa. The results of this study are applicable to various engineering applications of refractory materials.

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Park SH, Jeon SM, Jang J. Characteristic Behavior of Hydration of Magnesium Oxide. In Lecture Notes in Civil Engineering. Springer. 2020. p. 1275-1279. (Lecture Notes in Civil Engineering). https://doi.org/10.1007/978-981-15-2184-3_168