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Effect of a commercial dispersion of multi walled carbon nanotubes on the hydration of an oil well cementing paste 被引量:1
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作者 Ocar Aurelio MENDOZA REALES William C. PEARL Jr +2 位作者 Maria D. M. PAIVA Cristiane R. MIRANDA Romildo Dias TOLEDO FILHO 《Frontiers of Structural and Civil Engineering》 SCIE EI CSCD 2016年第2期174-179,共6页
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 pro... 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. 展开更多
关键词 carbon nanotubes SURFACTANT RETARDATION combined water C-S-H
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