Polymorph transformation kinetics of Ca3SiO5 with MgO

Suhua Ma; Weiqiang Zhou; Shaopeng Wang; Weifeng Li; Xiaodong Shen

doi:10.1080/01411594.2015.1030746

Polymorph transformation kinetics of Ca₃SiO₅ with MgO

Suhua Ma, Weiqiang Zhou, Shaopeng Wang, Weifeng Li, Xiaodong Shen

College of Materials Science and Engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Tricalcium silicate (Ca₃SiO₅ (C₃S)) is the primary cement phase in Portland cement. An understanding of its transformation kinetics is important to make use of its polymorphism. In this study, X-ray diffractometry and Rietveld refinement were used to qualitatively and quantitatively analyze the phase compositions of C₃S with 2.0% MgO. The results show that C₃S with 2.0% MgO is a monoclinic polymorph, M3. Heat treatment changes this monoclinic polymorph to a triclinic polymorph via the precipitation of MgO. The transformation kinetics follows the first-order exponential decay function.

Original language	English
Pages (from-to)	888-896
Number of pages	9
Journal	Phase Transitions
Volume	88
Issue number	9
DOIs	https://doi.org/10.1080/01411594.2015.1030746
State	Published - 2 Sep 2015

Keywords

heat treatment
kinetics
polymorph
tricalcium silicate

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10.1080/01411594.2015.1030746

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title = "Polymorph transformation kinetics of Ca3SiO5 with MgO",

abstract = "Tricalcium silicate (Ca3SiO5 (C3S)) is the primary cement phase in Portland cement. An understanding of its transformation kinetics is important to make use of its polymorphism. In this study, X-ray diffractometry and Rietveld refinement were used to qualitatively and quantitatively analyze the phase compositions of C3S with 2.0% MgO. The results show that C3S with 2.0% MgO is a monoclinic polymorph, M3. Heat treatment changes this monoclinic polymorph to a triclinic polymorph via the precipitation of MgO. The transformation kinetics follows the first-order exponential decay function.",

keywords = "heat treatment, kinetics, polymorph, tricalcium silicate",

author = "Suhua Ma and Weiqiang Zhou and Shaopeng Wang and Weifeng Li and Xiaodong Shen",

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T1 - Polymorph transformation kinetics of Ca3SiO5 with MgO

AU - Ma, Suhua

AU - Zhou, Weiqiang

AU - Wang, Shaopeng

AU - Li, Weifeng

AU - Shen, Xiaodong

PY - 2015/9/2

Y1 - 2015/9/2

N2 - Tricalcium silicate (Ca3SiO5 (C3S)) is the primary cement phase in Portland cement. An understanding of its transformation kinetics is important to make use of its polymorphism. In this study, X-ray diffractometry and Rietveld refinement were used to qualitatively and quantitatively analyze the phase compositions of C3S with 2.0% MgO. The results show that C3S with 2.0% MgO is a monoclinic polymorph, M3. Heat treatment changes this monoclinic polymorph to a triclinic polymorph via the precipitation of MgO. The transformation kinetics follows the first-order exponential decay function.

AB - Tricalcium silicate (Ca3SiO5 (C3S)) is the primary cement phase in Portland cement. An understanding of its transformation kinetics is important to make use of its polymorphism. In this study, X-ray diffractometry and Rietveld refinement were used to qualitatively and quantitatively analyze the phase compositions of C3S with 2.0% MgO. The results show that C3S with 2.0% MgO is a monoclinic polymorph, M3. Heat treatment changes this monoclinic polymorph to a triclinic polymorph via the precipitation of MgO. The transformation kinetics follows the first-order exponential decay function.

KW - heat treatment

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KW - polymorph

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Polymorph transformation kinetics of Ca₃SiO₅ with MgO

Abstract

Keywords

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