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The effect of natural SiO2 nanoparticles on the performance of portland cement based materials
Sobolev K.a, Flores-Vivian I.b, Pradoto R.G.K.c, Kozhukhova M.a, Potapov V.d
a Department of Civil and Environmental Engineering, University of Wisconsin-Milwaukee (UWM), United States
b Universidad Autónoma de Nuevo Leon (UANL), Mexico
c Faculty of Civil and Environmental Engineering, Division of Construction Engineering and Management (CEM), Institut Teknologi Bandung (ITB), Indonesia
d Center of the Far East Branch of Russian Academy Sciences, Russian Federation
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2018 American Concrete Institute. All rights reserved.This research reports on the performance of nano-SiO2 particles from natural hydrothermal solutions obtained by membrane ultrafiltration and, optionally, by cryochemical vacuum sublimation drying in portland cement based systems. The SiO2 rich solutions were obtained from the wells of Mutnovsky geothermal power station (Far East of Russia). The constant nano-SiO2 dosage of 0.25% (by solid material weight of cementitious materials) was used to compare the cement systems with different nanoparticles against a reference mortar and a commercially available nano-SiO2. Nanoparticles were characterized by X-Ray Diffraction (XRD), BET Surface Area, Scanning Electron Microscope (SEM) and Fourier Transform Infrared (FTIR) spectroscopy. The distribution of nano-SiO2 particles within the cement paste plays an essential role governing the overall performance of these products. Therefore, the addition of polycarboxylate ether superplasticizer and the dispersion treatment using an ultrasound processor were used to facilitate the distribution of nano-SiO2 particles in mixing water. The effect of the nano-SiO2 particles in portland cement systems was quantified by evaluating the flow, heat of hydration and compressive strength development. It was demonstrated that the use of nano-SiO2 particles can reduce the segregation and improve the strength which is essential for many applications including Self-Consolidating Concrete.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Cement based material,Cementitious materials,Heat of hydration,Membrane ultrafiltration,Polycarboxylate ethers,Self-consolidating concrete,Surface area,Vacuum sublimation[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Compressive strength,Cryochemical vacuum sublimation drying,Heat of hydration,Nanoparticles,Portland cement,Surface area,Ultrafiltration[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]The authors acknowledge the financial support from PCA and donation of materials by the Lafarge Cement Company, AKZO Nobel and Handy Chemicals.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]