Effect of a commercial dispersion of multi walled carbon nanotubes on the hydration of an oil well cementing paste

• Published in: Frontiers of Structural and Civil Engineering Vol. 10; no. 2; pp. 174 - 179
• Main Authors: Mendoza Reales, Ocar Aurelio, Pearl, William C., Paiva, Maria D. M., Miranda, Cristiane R., Toledo Filho, Romildo Dias
• Format: Journal Article
• Language: English
• Published: Beijing Higher Education Press 01.06.2016; Springer Nature B.V
• Subjects: Calorimetry; Cement; Cement paste; Cities; Civil Engineering; Countries; Dispersion; Engineering; Hydration; Multi wall carbon nanotubes; Nanotechnology; Nanotubes; Oil wells; Reagents; Regions; Research Article; Surfactants; Water-cement ratio; 井下温度; 分散液; 商业化; 多壁碳纳米管; 水化反应; 水泥浆体; 油井水泥浆; 阴离子表面活性剂; C-S-H; combined water; carbon nanotubes; surfactant; retardation
• ISSN: 2095-2430; 2095-2449
• DOI: 10.1007/s11709-015-0324-8

This work studies the influence of a commercial dispersion of multi wall carbon nanotubes （MWCNT） on the hydration of a class G cement paste, at room and elevated down-hole temperatures. The MWCNT dispersion was produced with a solids concentration of 3.0 % by mass and an anionic surfactant as dispersing agent. Cement pastes with water-to-cement ratio of 0.45 and additions of solid MWCNT by mass of cement up to 0.50 % were studied. Isothermal calorimetry results showed a clear retardation of the hydration of cement caused by the surfactant contained in the MWCNT dispersion. Nevertheless, thermogravimetric evaluations showed that once the hydration reaction resumed, the retardation effect of the surfactant did not have a negative impact on the amount of hydration products precipitated. It was concluded that the commercial MWCNT dispersion presents a good potential to be applied in oil well cement pastes.