TY - JOUR
T1 - Influence of MWCNT/surfactant dispersions on the rheology of Portland cement pastes
AU - Mendoza Reales, Oscar A.
AU - Arias Jaramillo, Yhan Paul
AU - Ochoa Botero, Juan Carlos
AU - Delgado, Carmen Alicia
AU - Quintero, Jorge Hernán
AU - Toledo Filho, Romildo Dias
PY - 2018/5/1
Y1 - 2018/5/1
N2 - © 2018 Elsevier Ltd This work studies the effect of MWCNT/surfactant aqueous dispersions on the rheology of cement paste. Three types of surfactants (sodium dodecyl sulfate, cetylpyridinium chloride and triton TX-100) were used to prepare cement pastes with and without MWCNT. Three rheological parameters were determined for each sample: static yield stress, yield stress, and viscosity. The first was measured directly, while the other two were obtained by fitting a Bingham model to the descending portion of a flow curve. Additionally, X-ray diffraction and isothermal calorimetry were used to follow the hydration reaction of cement during the first hour. It was found that the MWCNT/surfactant dispersions generate an overall shift to higher yield stress values while maintaining viscosity, suggesting a modification of the interparticle attraction. It was concluded that the triple interaction MWCNT-surfactant-cement governs the rheology of cement pastes.
AB - © 2018 Elsevier Ltd This work studies the effect of MWCNT/surfactant aqueous dispersions on the rheology of cement paste. Three types of surfactants (sodium dodecyl sulfate, cetylpyridinium chloride and triton TX-100) were used to prepare cement pastes with and without MWCNT. Three rheological parameters were determined for each sample: static yield stress, yield stress, and viscosity. The first was measured directly, while the other two were obtained by fitting a Bingham model to the descending portion of a flow curve. Additionally, X-ray diffraction and isothermal calorimetry were used to follow the hydration reaction of cement during the first hour. It was found that the MWCNT/surfactant dispersions generate an overall shift to higher yield stress values while maintaining viscosity, suggesting a modification of the interparticle attraction. It was concluded that the triple interaction MWCNT-surfactant-cement governs the rheology of cement pastes.
U2 - 10.1016/j.cemconres.2018.02.020
DO - 10.1016/j.cemconres.2018.02.020
M3 - Article
SN - 0008-8846
SP - 101
EP - 109
JO - Cement and Concrete Research
JF - Cement and Concrete Research
ER -