Early age hydration of calcium sulfoaluminate (synthetic ye'elimite, ) in the presence of gypsum and varying amounts of calcium hydroxide

Craig W. Hargis; Ana Paula Kirchheim; Paulo J. M. Monteiro; Ellis M. Gartner

doi:10.1016/j.cemconres.2013.03.001

Early age hydration of calcium sulfoaluminate (synthetic ye'elimite, ) in the presence of gypsum and varying amounts of calcium hydroxide

Craig W. Hargis, Ana Paula Kirchheim, Paulo J. M. Monteiro, Ellis M. Gartner

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

189 Scopus citations

Abstract

Suspensions of synthetic ye'elimite (C4A3S̄) in a saturated gypsum (CS̄H2) and calcium hydroxide (CH) solution were examined in-situ in a wet cell by soft X-ray transmission microscopy and ex-situ by scanning electron microscopy. The most voluminous hydration product observed was ettringite. Ettringite commonly displayed acicular, filiform, reticulated, and stellate crystal habits. Additionally, pastes with C 4A3S̄, 15% CS̄H2, and varying amounts of CH were prepared and examined with X-ray diffraction (XRD) and isothermal calorimetry. The XRD experiments showed that increasing CH content caused more solid solution (SO4 2 -/OH-) AFm phases to form at early ages (< 1 d) and more monosulfate to form at later ages (> 1 d). Calorimetry indicated that the increased production of solid solution AFm was accompanied with an increase in the initial (< 30 min) rate of heat evolution, and increasing CH generally reduced the time till the second maximum rate of heat evolution due to the formation of ettringite and monosulfate. © 2013 Elsevier Ltd.

Original language	English (US)
Pages (from-to)	105-115
Number of pages	11
Journal	Cement and Concrete Research
Volume	48
DOIs	https://doi.org/10.1016/j.cemconres.2013.03.001
State	Published - Jun 2013
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-l1-004021
Acknowledgements: C.W. Hargis was supported by the Berkeley Fellowship for Graduate Study and the Carlson-Polivka Fellowship. A.P. Kirchheim acknowledges the financial support of CAPES (Fundacao Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Ministerio da Educacao - Brasil) and CNPq (National Counsel of Technological and Scientific Development). Research at XM-1 is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under contract no. DE-AC02-05CH11231. We thank Peter Fischer and Mi-Young Im for assisting the XM-1 users and maintaining the beamline. This publication was based on work supported in part by award no. KUS-l1-004021, made by King Abdullah University of Science and Technology (KAUST).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

Access to Document

10.1016/j.cemconres.2013.03.001

Cite this

@article{b4b4dab376284cb79db32d78f668e7db,

title = "Early age hydration of calcium sulfoaluminate (synthetic ye'elimite, ) in the presence of gypsum and varying amounts of calcium hydroxide",

abstract = "Suspensions of synthetic ye'elimite (C4A3{\=S}) in a saturated gypsum (C{\=S}H2) and calcium hydroxide (CH) solution were examined in-situ in a wet cell by soft X-ray transmission microscopy and ex-situ by scanning electron microscopy. The most voluminous hydration product observed was ettringite. Ettringite commonly displayed acicular, filiform, reticulated, and stellate crystal habits. Additionally, pastes with C 4A3{\=S}, 15% C{\=S}H2, and varying amounts of CH were prepared and examined with X-ray diffraction (XRD) and isothermal calorimetry. The XRD experiments showed that increasing CH content caused more solid solution (SO4 2 -/OH-) AFm phases to form at early ages (< 1 d) and more monosulfate to form at later ages (> 1 d). Calorimetry indicated that the increased production of solid solution AFm was accompanied with an increase in the initial (< 30 min) rate of heat evolution, and increasing CH generally reduced the time till the second maximum rate of heat evolution due to the formation of ettringite and monosulfate. {\textcopyright} 2013 Elsevier Ltd.",

author = "Hargis, {Craig W.} and Kirchheim, {Ana Paula} and Monteiro, {Paulo J. M.} and Gartner, {Ellis M.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-l1-004021 Acknowledgements: C.W. Hargis was supported by the Berkeley Fellowship for Graduate Study and the Carlson-Polivka Fellowship. A.P. Kirchheim acknowledges the financial support of CAPES (Fundacao Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Ministerio da Educacao - Brasil) and CNPq (National Counsel of Technological and Scientific Development). Research at XM-1 is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under contract no. DE-AC02-05CH11231. We thank Peter Fischer and Mi-Young Im for assisting the XM-1 users and maintaining the beamline. This publication was based on work supported in part by award no. KUS-l1-004021, made by King Abdullah University of Science and Technology (KAUST). This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2013",

month = jun,

doi = "10.1016/j.cemconres.2013.03.001",

language = "English (US)",

volume = "48",

pages = "105--115",

journal = "Cement and Concrete Research",

issn = "0008-8846",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Early age hydration of calcium sulfoaluminate (synthetic ye'elimite, ) in the presence of gypsum and varying amounts of calcium hydroxide

AU - Hargis, Craig W.

AU - Kirchheim, Ana Paula

AU - Monteiro, Paulo J. M.

AU - Gartner, Ellis M.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUS-l1-004021 Acknowledgements: C.W. Hargis was supported by the Berkeley Fellowship for Graduate Study and the Carlson-Polivka Fellowship. A.P. Kirchheim acknowledges the financial support of CAPES (Fundacao Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Ministerio da Educacao - Brasil) and CNPq (National Counsel of Technological and Scientific Development). Research at XM-1 is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under contract no. DE-AC02-05CH11231. We thank Peter Fischer and Mi-Young Im for assisting the XM-1 users and maintaining the beamline. This publication was based on work supported in part by award no. KUS-l1-004021, made by King Abdullah University of Science and Technology (KAUST). This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2013/6

Y1 - 2013/6

N2 - Suspensions of synthetic ye'elimite (C4A3S̄) in a saturated gypsum (CS̄H2) and calcium hydroxide (CH) solution were examined in-situ in a wet cell by soft X-ray transmission microscopy and ex-situ by scanning electron microscopy. The most voluminous hydration product observed was ettringite. Ettringite commonly displayed acicular, filiform, reticulated, and stellate crystal habits. Additionally, pastes with C 4A3S̄, 15% CS̄H2, and varying amounts of CH were prepared and examined with X-ray diffraction (XRD) and isothermal calorimetry. The XRD experiments showed that increasing CH content caused more solid solution (SO4 2 -/OH-) AFm phases to form at early ages (< 1 d) and more monosulfate to form at later ages (> 1 d). Calorimetry indicated that the increased production of solid solution AFm was accompanied with an increase in the initial (< 30 min) rate of heat evolution, and increasing CH generally reduced the time till the second maximum rate of heat evolution due to the formation of ettringite and monosulfate. © 2013 Elsevier Ltd.

AB - Suspensions of synthetic ye'elimite (C4A3S̄) in a saturated gypsum (CS̄H2) and calcium hydroxide (CH) solution were examined in-situ in a wet cell by soft X-ray transmission microscopy and ex-situ by scanning electron microscopy. The most voluminous hydration product observed was ettringite. Ettringite commonly displayed acicular, filiform, reticulated, and stellate crystal habits. Additionally, pastes with C 4A3S̄, 15% CS̄H2, and varying amounts of CH were prepared and examined with X-ray diffraction (XRD) and isothermal calorimetry. The XRD experiments showed that increasing CH content caused more solid solution (SO4 2 -/OH-) AFm phases to form at early ages (< 1 d) and more monosulfate to form at later ages (> 1 d). Calorimetry indicated that the increased production of solid solution AFm was accompanied with an increase in the initial (< 30 min) rate of heat evolution, and increasing CH generally reduced the time till the second maximum rate of heat evolution due to the formation of ettringite and monosulfate. © 2013 Elsevier Ltd.

UR - http://hdl.handle.net/10754/598044

UR - https://linkinghub.elsevier.com/retrieve/pii/S0008884613000550

UR - http://www.scopus.com/inward/record.url?scp=84876145919&partnerID=8YFLogxK

U2 - 10.1016/j.cemconres.2013.03.001

DO - 10.1016/j.cemconres.2013.03.001

M3 - Article

SN - 0008-8846

VL - 48

SP - 105

EP - 115

JO - Cement and Concrete Research

JF - Cement and Concrete Research

ER -

Early age hydration of calcium sulfoaluminate (synthetic ye'elimite, ) in the presence of gypsum and varying amounts of calcium hydroxide

Abstract

Bibliographical note

Access to Document

Other files and links

Fingerprint

Cite this