Structural and hydration properties of amorphous tricalcium silicate

Mori, Kazuhiro; Fukunaga, Toshiharu; Shiraishi, Yasuhiro; Iwase, Kenji; Xu, Qian; Oishi, Koji; Yatsuyanagi, Koh; Yonemura, Masao; Itoh, Keiji; Sugiyama, Masaaki; Ishigaki, Tōru; Kamiyama, Takashi; Kawai, Masayoshi

doi:10.1016/j.cemconres.2006.05.004

Cited by 5 publications

(3 citation statements)

References 23 publications

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“…Goñi et al ., in turn, obtained 65% and 82% hydration, respectively, in 3‐ and 28 d C 3 S pastes made with a w/s ratio of 0.4 and cured in an inert atmosphere at 100% RH and 25°C. These findings confirmed the scant reactivity of the synthesized C 3 S. Moreover, Mori et al . proved that the partial amorphization achieved by milling C 3 S induced the formation of hydration products, and that chemical activity was lower in highly crystalline C 3 S in the early hydration stage.…”

Section: Resultssupporting

confidence: 70%

Effect of Temperature on C₃S and C₃S + Nanosilica Hydration and C–S–H Structure

et al. 2012

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This study aimed to monitor the effect of temperature and the addition of nanosilica on the nanostructure of the C–S–H gel forming during tricalcium silicate (C3S) hydration. Two types of paste were prepared from a synthesized T1 C3S. The first consisted of a blend of deionized water and C3S at a water/solid ratio of 0.425. In the second, a 90 wt% C3S + 10 wt% of nanosilica blend was mixed with water at a water/solid ratio of 0.7. The pastes were stored in closed containers at 100% RH and 25°C, 40°C, or 65°C. The hydration reaction was detained after 1, 14, 28, or 62 d with acetone, and then pastes were studied by 29Si magic angle spinning nuclear magnetic resonance (29Si MAS NMR).The main conclusion was that adding nSA expedites C3S hydration at any age or temperature and modifies the structure of the C–S–H gel formed, two types of C–S–H gel appear. At 25°C and 40°C, more orderly, longer chain gels are initially (1 d) obtained as a result of the pozzolanic reaction between nSA and portlandite (CH) (C–S–HII gel formation). Subsequently, ongoing C3S hydration and the concomitant flow of dimers shorten the mean chain length in the gel.

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Section: Resultssupporting

confidence: 70%

Effect of Temperature on C₃S and C₃S + Nanosilica Hydration and C–S–H Structure

et al. 2012

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“…In addition, it was obvious that a characteristic peak of calcite (CaCO 3 ) at 2y 5 29.41 corresponding to the (104) reflection existed because of the hydration of Ca 3 SiO 5 . 22 After soaking for 7 and 14 days, only the diffraction peaks for HAp and calcite were detected, which suggested that HAp covered Ca 3 SiO 5 surfaces and Ca 3 SiO 5 experienced deeper hydration.…”

Section: Resultsmentioning

confidence: 95%

“…After a prolonged soaking time of 3 days, most diffraction peaks of Ca 3 SiO 5 disappeared and the broad peaks of HAp became obvious, indicating that the deposited HAp should be nanocrystalline. In addition, it was obvious that a characteristic peak of calcite (CaCO 3 ) at 2θ=29.4° corresponding to the (104) reflection existed because of the hydration of Ca 3 SiO 5 22 . After soaking for 7 and 14 days, only the diffraction peaks for HAp and calcite were detected, which suggested that HAp covered Ca 3 SiO 5 surfaces and Ca 3 SiO 5 experienced deeper hydration.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Characterization of Tricalcium Silicate Bioceramics with High Mechanical Properties by Spark Plasma Sintering

Zhong

Wang

et al. 2011

International Journal of Applied Ceramic Technology

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Bioactive tricalcium silicate ceramics (Ca3SiO5) were fabricated by spark plasma sintering (SPS), and their sinterability and mechanical properties were examined. The bioactivity and in vitro biocompatibility of Ca3SiO5 ceramics were evaluated. Ca3SiO5 ceramics show higher density and superior mechanical properties compared with those prepared by conventional pressureless sintering. In addition, hydroxyapatite was induced to form on the surface of Ca3SiO5 ceramics when soaked in simulated body fluid and bone marrow mesenchymal stem cells were attached and spread well on the ceramics. Ca3SiO5 ceramics fabricated by SPS possess excellent mechanical properties, bioactivity, and biocompatibility and are promising bone repaired materials.

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