Abstract
The hydration and strength evolution of two multi-phase ternesite-based cements with 15 and 29 wt% ternesite are reported. The synthesis and hydration properties of single phase ternesite, nominally Ca5(SiO4)2SO4, are also reported including both chemically-pure ternesite and preparations doped with sodium, potassium, phosphorous, magnesium, manganese, strontium, zinc and titanium oxides. Hydration of the samples at 25 °C was studied by calorimetry and quantitative X-ray diffraction. Unconfined compressive strength development was determined for up to 1 year. Single-phase chemically activated ternesite hydrated rapidly at 25 °C achieved compressive strengths of ≈30 and ≈65 MPa at 28 and 90 days respectively, with C-S-H and gypsum as hydration products. The multi-phase ternesite-based cements reached 7 day strengths of ≈30 MPa. It is concluded that ternesite reacts with water, exhibiting strength gain. The future of calcium sulfoaluminate and sulfosilicate cements is discussed and it is suggested that a considerable, and as yet unrealised scope exists for simultaneously optimising cementing properties while lowering production costs and reducing CO2 emissions.
| Original language | English |
|---|---|
| Pages (from-to) | 27-40 |
| Number of pages | 14 |
| Journal | Cement and Concrete Research |
| Volume | 113 |
| Early online date | 20 Jul 2018 |
| DOIs | |
| Publication status | Published - 30 Nov 2018 |
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Keywords
- Calcium sulfosilicate
- Hydration
- Synthesis
- Ternesite
ASJC Scopus subject areas
- Building and Construction
- Materials Science(all)
Cite this
The synthesis and hydration of ternesite, Ca5(SiO4)2SO4. / Skalamprinos, Solon (Corresponding Author); Jen, Gabriel; Galan, Isabel; Whittaker, Mark; Elhoweris, Ammar; Glasser, Fredrik.
In: Cement and Concrete Research, Vol. 113, 30.11.2018, p. 27-40.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The synthesis and hydration of ternesite, Ca5(SiO4)2SO4
AU - Skalamprinos, Solon
AU - Jen, Gabriel
AU - Galan, Isabel
AU - Whittaker, Mark
AU - Elhoweris, Ammar
AU - Glasser, Fredrik
N1 - The authors would like to thank the financial support provided by the Gulf Organisation for Research and Development (GORD) through the research grant number ENG016RGG11757. The authors would like to thank Dr. Marianna Kourouzidou for all the meaningful discussions about the strength evolution of PC systems and Vassiliko Cement Works Plc that allowed me to use their equipment to obtain particle size distribution data. The authors would also like to thank Dr. Jo Duncan for insightful discussions regarding crystallography.
PY - 2018/11/30
Y1 - 2018/11/30
N2 - The hydration and strength evolution of two multi-phase ternesite-based cements with 15 and 29 wt% ternesite are reported. The synthesis and hydration properties of single phase ternesite, nominally Ca5(SiO4)2SO4, are also reported including both chemically-pure ternesite and preparations doped with sodium, potassium, phosphorous, magnesium, manganese, strontium, zinc and titanium oxides. Hydration of the samples at 25 °C was studied by calorimetry and quantitative X-ray diffraction. Unconfined compressive strength development was determined for up to 1 year. Single-phase chemically activated ternesite hydrated rapidly at 25 °C achieved compressive strengths of ≈30 and ≈65 MPa at 28 and 90 days respectively, with C-S-H and gypsum as hydration products. The multi-phase ternesite-based cements reached 7 day strengths of ≈30 MPa. It is concluded that ternesite reacts with water, exhibiting strength gain. The future of calcium sulfoaluminate and sulfosilicate cements is discussed and it is suggested that a considerable, and as yet unrealised scope exists for simultaneously optimising cementing properties while lowering production costs and reducing CO2 emissions.
AB - The hydration and strength evolution of two multi-phase ternesite-based cements with 15 and 29 wt% ternesite are reported. The synthesis and hydration properties of single phase ternesite, nominally Ca5(SiO4)2SO4, are also reported including both chemically-pure ternesite and preparations doped with sodium, potassium, phosphorous, magnesium, manganese, strontium, zinc and titanium oxides. Hydration of the samples at 25 °C was studied by calorimetry and quantitative X-ray diffraction. Unconfined compressive strength development was determined for up to 1 year. Single-phase chemically activated ternesite hydrated rapidly at 25 °C achieved compressive strengths of ≈30 and ≈65 MPa at 28 and 90 days respectively, with C-S-H and gypsum as hydration products. The multi-phase ternesite-based cements reached 7 day strengths of ≈30 MPa. It is concluded that ternesite reacts with water, exhibiting strength gain. The future of calcium sulfoaluminate and sulfosilicate cements is discussed and it is suggested that a considerable, and as yet unrealised scope exists for simultaneously optimising cementing properties while lowering production costs and reducing CO2 emissions.
KW - Calcium sulfosilicate
KW - Hydration
KW - Synthesis
KW - Ternesite
UR - http://www.scopus.com/inward/record.url?scp=85050163758&partnerID=8YFLogxK
U2 - 10.1016/j.cemconres.2018.06.012
DO - 10.1016/j.cemconres.2018.06.012
M3 - Article
AN - SCOPUS:85050163758
VL - 113
SP - 27
EP - 40
JO - Cement and Concrete Research
JF - Cement and Concrete Research
SN - 0008-8846
ER -