skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effects of quartz particle size and water-to-solid ratio on hydrothermal synthesis of tobermorite studied by in-situ time-resolved X-ray diffraction

Abstract

Hydrothermal synthesis process of tobermorite (5CaO.6SiO{sub 2}.5H{sub 2}O) has been investigated by in-situ X-ray diffraction using high-energy X-rays from a synchrotron radiation source in combination with a purpose-build autoclave cell. Dissolution rates of quartz were largely affected by its particle size distribution in the starting mixtures. However, the composition (Ca/Si) of non-crystalline C-S-H at the start of tobermorite formation was identical regardless of the quartz dissolution rate. An effect of water-to-solid ratio (w/s) was investigated for samples using fine particle quartz. Tobermorite did not occur with w/s of 1.7 but occurred with w/s higher than 3.0. Surprisingly, however, the dissolution curves of quartz were nearly identical for all samples with w/s from 1.7 to 9, indicating that the dissolution rate is predominated by surface area. Possible reaction mechanism for tobermorite formation will be discussed in terms of Ca and/or silicate ion concentration in the liquid phase and distribution of Ca/Si in non-crystalline C-S-H. - Graphical abstract: Time-resolved XRD data set was obtained at up to 190 deg. C under a saturated steam pressure. Tobermorite (5CaO.6SiO{sub 2}.5H{sub 2}O) formation reaction was investigated in detail for several different starting materials. Highlights: > Hydrothermal formation of tobermorite was monitored by in-situ XRD. >more » Ca/Si of C-S-H at the start time of tobermorite formation was determined. > The Ca/Si value was identical regardless of the quartz particle size in the starting mixture.« less

Authors:
 [1]; ; ;  [1]; ;  [2];  [3]
  1. Analysis and Simulation Center, Asahi-KASEI Corporation, 2-1 Samejima Fuji, Shizuoka 416-8501 (Japan)
  2. Construction Materials Laboratory, Asahi-KASEI Construction Materials Corporation, Sakai-machi, Ibaraki 306-0493 (Japan)
  3. Industrial Application Division, SPring-8/JASRI, Sayo, Hyogo 679-5198 (Japan)
Publication Date:
OSTI Identifier:
21580219
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 184; Journal Issue: 8; Other Information: DOI: 10.1016/j.jssc.2011.05.061; PII: S0022-4596(11)00310-0; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DISSOLUTION; HYDROTHERMAL SYNTHESIS; PARTICLE SIZE; PARTICLES; QUARTZ; REACTION KINETICS; SILICATES; SOLIDS; SYNCHROTRON RADIATION SOURCES; TIME RESOLUTION; X RADIATION; X-RAY DIFFRACTION; COHERENT SCATTERING; DIFFRACTION; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; KINETICS; MINERALS; OXIDE MINERALS; OXYGEN COMPOUNDS; RADIATION SOURCES; RADIATIONS; RESOLUTION; SCATTERING; SILICON COMPOUNDS; SIZE; SYNTHESIS; TIMING PROPERTIES

Citation Formats

Kikuma, J, Tsunashima, M, Ishikawa, T, Matsuno, S, Ogawa, A, Matsui, K, and Sato, M. Effects of quartz particle size and water-to-solid ratio on hydrothermal synthesis of tobermorite studied by in-situ time-resolved X-ray diffraction. United States: N. p., 2011. Web. doi:10.1016/j.jssc.2011.05.061.
Kikuma, J, Tsunashima, M, Ishikawa, T, Matsuno, S, Ogawa, A, Matsui, K, & Sato, M. Effects of quartz particle size and water-to-solid ratio on hydrothermal synthesis of tobermorite studied by in-situ time-resolved X-ray diffraction. United States. https://doi.org/10.1016/j.jssc.2011.05.061
Kikuma, J, Tsunashima, M, Ishikawa, T, Matsuno, S, Ogawa, A, Matsui, K, and Sato, M. 2011. "Effects of quartz particle size and water-to-solid ratio on hydrothermal synthesis of tobermorite studied by in-situ time-resolved X-ray diffraction". United States. https://doi.org/10.1016/j.jssc.2011.05.061.
@article{osti_21580219,
title = {Effects of quartz particle size and water-to-solid ratio on hydrothermal synthesis of tobermorite studied by in-situ time-resolved X-ray diffraction},
author = {Kikuma, J and Tsunashima, M and Ishikawa, T and Matsuno, S and Ogawa, A and Matsui, K and Sato, M},
abstractNote = {Hydrothermal synthesis process of tobermorite (5CaO.6SiO{sub 2}.5H{sub 2}O) has been investigated by in-situ X-ray diffraction using high-energy X-rays from a synchrotron radiation source in combination with a purpose-build autoclave cell. Dissolution rates of quartz were largely affected by its particle size distribution in the starting mixtures. However, the composition (Ca/Si) of non-crystalline C-S-H at the start of tobermorite formation was identical regardless of the quartz dissolution rate. An effect of water-to-solid ratio (w/s) was investigated for samples using fine particle quartz. Tobermorite did not occur with w/s of 1.7 but occurred with w/s higher than 3.0. Surprisingly, however, the dissolution curves of quartz were nearly identical for all samples with w/s from 1.7 to 9, indicating that the dissolution rate is predominated by surface area. Possible reaction mechanism for tobermorite formation will be discussed in terms of Ca and/or silicate ion concentration in the liquid phase and distribution of Ca/Si in non-crystalline C-S-H. - Graphical abstract: Time-resolved XRD data set was obtained at up to 190 deg. C under a saturated steam pressure. Tobermorite (5CaO.6SiO{sub 2}.5H{sub 2}O) formation reaction was investigated in detail for several different starting materials. Highlights: > Hydrothermal formation of tobermorite was monitored by in-situ XRD. > Ca/Si of C-S-H at the start time of tobermorite formation was determined. > The Ca/Si value was identical regardless of the quartz particle size in the starting mixture.},
doi = {10.1016/j.jssc.2011.05.061},
url = {https://www.osti.gov/biblio/21580219}, journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 8,
volume = 184,
place = {United States},
year = {Mon Aug 15 00:00:00 EDT 2011},
month = {Mon Aug 15 00:00:00 EDT 2011}
}