TY - GEN
T1 - Influence of a calcined clay and the temperature on the hydration of an oilwell cement
AU - Ribalta, Juan Alberto
AU - Díaz, Adrián Alujas
AU - Martirena, José Fernando
N1 - Publisher Copyright:
© RILEM 2018.
PY - 2018
Y1 - 2018
N2 - The influence of a calcined clay on the hydration of an oilwell cement was studied in slurries. The replacement grades of the cement (by weight of cement) were 5, 10 and 20% of the calcined clay. The slurries were prepared at a density of 1.80 g·cm−3 and hydrated in sealed containers at 30 and 60 °C during 24 h. A reference slurry was prepared where the cement was substituted by 5% of a zeolitic tuff. The water–to–solid ratio was 0.52 for each slurry. From the TGA and pozzolanic reactivity tests were shown that the calcined clay was more reactive than the zeolitic tuff. The isothermal calorimetry tests showed that the induction periods of the slurries were shorter when the cement was replaced by the calcined clay at both temperatures and they decreased with the increment of the temperature and the replacement level by the mineral addition, what could impact negatively the thickening time in real conditions. The MIP assays evidenced that the influence of the kind and the quantity of the mineral addition on the porosity of the hardened slurries is complex but in general it was observed a refinement of porosity and less total porosity when the slurries were hydrated at 60 °C. The XRD experiments showed that the phase assemblages when the slurries were cured at 60 °C were more complex and with more crystalline phases presents, which could have influences on the performance of the hardened slurries in real well conditions.
AB - The influence of a calcined clay on the hydration of an oilwell cement was studied in slurries. The replacement grades of the cement (by weight of cement) were 5, 10 and 20% of the calcined clay. The slurries were prepared at a density of 1.80 g·cm−3 and hydrated in sealed containers at 30 and 60 °C during 24 h. A reference slurry was prepared where the cement was substituted by 5% of a zeolitic tuff. The water–to–solid ratio was 0.52 for each slurry. From the TGA and pozzolanic reactivity tests were shown that the calcined clay was more reactive than the zeolitic tuff. The isothermal calorimetry tests showed that the induction periods of the slurries were shorter when the cement was replaced by the calcined clay at both temperatures and they decreased with the increment of the temperature and the replacement level by the mineral addition, what could impact negatively the thickening time in real conditions. The MIP assays evidenced that the influence of the kind and the quantity of the mineral addition on the porosity of the hardened slurries is complex but in general it was observed a refinement of porosity and less total porosity when the slurries were hydrated at 60 °C. The XRD experiments showed that the phase assemblages when the slurries were cured at 60 °C were more complex and with more crystalline phases presents, which could have influences on the performance of the hardened slurries in real well conditions.
UR - https://www.scopus.com/pages/publications/85033670347
U2 - 10.1007/978-94-024-1207-9_61
DO - 10.1007/978-94-024-1207-9_61
M3 - Conference contribution
AN - SCOPUS:85033670347
SN - 9789402412062
T3 - RILEM Bookseries
SP - 377
EP - 383
BT - Calcined Clays for Sustainable Concrete - Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete
A2 - Favier, Aurelie
A2 - Scrivener, Karen
A2 - Martirena, Fernando
PB - Springer Netherlands
T2 - 2nd International Conference on Calcined Clays for Sustainable Concrete, 2017
Y2 - 5 December 2017 through 7 December 2017
ER -