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Title: Effect of Tartaric Acid on Hydration of a Sodium-Metasilicate-Activated Blend of Calcium Aluminate Cement and Fly Ash F

An alkali-activated blend of aluminum cement and class F fly ash is an attractive solution for geothermal wells where cement is exposed to significant thermal shocks and aggressive environments. Set-control additives enable the safe cement placement in a well but may compromise its mechanical properties. Here, this work evaluates the effect of a tartaric-acid set retarder on phase composition, microstructure, and strength development of a sodium-metasilicate-activated calcium aluminate/fly ash class F blend after curing at 85 °C, 200 °C or 300 °C. The hardened materials were characterized with X-ray diffraction, thermogravimetric analysis, X-ray computed tomography, and combined scanning electron microscopy/energy-dispersive X-ray spectroscopy and tested for mechanical strength. With increasing temperature, a higher number of phase transitions in non-retarded specimens was found as a result of fast cement hydration. The differences in the phase compositions were also attributed to tartaric acid interactions with metal ions released by the blend in retarded samples. The retarded samples showed higher total porosity but reduced percentage of large pores (above 500 µm) and greater compressive strength after 300 °C curing. Lastly, mechanical properties of the set cements were not compromised by the retarder.
Authors:
 [1] ;  [1] ;  [2] ;  [3]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. National Univ. of Singapore ( Singapore). Dept. of Civil & Environmental Engineering
  3. Schlumberger Riboud Product Center (SRPC), Clamart (France)
Publication Date:
Report Number(s):
BNL-112704-2016-JAAM
Journal ID: ISSN 1996-1944; MATEG9; TRN: US1802060
Grant/Contract Number:
SC0012704; AC02-98CH10886
Type:
Accepted Manuscript
Journal Name:
Materials
Additional Journal Information:
Journal Volume: 9; Journal Issue: 12; Journal ID: ISSN 1996-1944
Publisher:
MDPI
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Geothermal Technologies Office (EE-4G); USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY
OSTI Identifier:
1425182

Pyatina, Tatiana, Sugama, Toshifumi, Moon, Juhyuk, and James, Simon. Effect of Tartaric Acid on Hydration of a Sodium-Metasilicate-Activated Blend of Calcium Aluminate Cement and Fly Ash F. United States: N. p., Web. doi:10.3390/ma9060422.
Pyatina, Tatiana, Sugama, Toshifumi, Moon, Juhyuk, & James, Simon. Effect of Tartaric Acid on Hydration of a Sodium-Metasilicate-Activated Blend of Calcium Aluminate Cement and Fly Ash F. United States. doi:10.3390/ma9060422.
Pyatina, Tatiana, Sugama, Toshifumi, Moon, Juhyuk, and James, Simon. 2016. "Effect of Tartaric Acid on Hydration of a Sodium-Metasilicate-Activated Blend of Calcium Aluminate Cement and Fly Ash F". United States. doi:10.3390/ma9060422. https://www.osti.gov/servlets/purl/1425182.
@article{osti_1425182,
title = {Effect of Tartaric Acid on Hydration of a Sodium-Metasilicate-Activated Blend of Calcium Aluminate Cement and Fly Ash F},
author = {Pyatina, Tatiana and Sugama, Toshifumi and Moon, Juhyuk and James, Simon},
abstractNote = {An alkali-activated blend of aluminum cement and class F fly ash is an attractive solution for geothermal wells where cement is exposed to significant thermal shocks and aggressive environments. Set-control additives enable the safe cement placement in a well but may compromise its mechanical properties. Here, this work evaluates the effect of a tartaric-acid set retarder on phase composition, microstructure, and strength development of a sodium-metasilicate-activated calcium aluminate/fly ash class F blend after curing at 85 °C, 200 °C or 300 °C. The hardened materials were characterized with X-ray diffraction, thermogravimetric analysis, X-ray computed tomography, and combined scanning electron microscopy/energy-dispersive X-ray spectroscopy and tested for mechanical strength. With increasing temperature, a higher number of phase transitions in non-retarded specimens was found as a result of fast cement hydration. The differences in the phase compositions were also attributed to tartaric acid interactions with metal ions released by the blend in retarded samples. The retarded samples showed higher total porosity but reduced percentage of large pores (above 500 µm) and greater compressive strength after 300 °C curing. Lastly, mechanical properties of the set cements were not compromised by the retarder.},
doi = {10.3390/ma9060422},
journal = {Materials},
number = 12,
volume = 9,
place = {United States},
year = {2016},
month = {5}
}