Modification of Cement Composites with Hydrothermal Nano-SiO2

Published on Dec 1, 2021in Journal of Materials in Civil Engineering3.266
· DOI :10.1061/(ASCE)MT.1943-5533.0003964
Vadim V. Potapov5
Estimated H-index: 5
(RAS: Russian Academy of Sciences),
Yuriy V. Efimenko1
Estimated H-index: 1
+ 3 AuthorsYury Liseitsev1
Estimated H-index: 1
(Far Eastern Federal University)
Source
Abstract
AbstractThe modification of cement concretes with various silica-containing additives is an urgent task that can significantly improve their physical and mechanical properties, as well as operation...
References56
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#1Vadim V. Potapov (RAS: Russian Academy of Sciences)H-Index: 5
#2Yuriy V. EfimenkoH-Index: 1
Last. Denis Gorev (RAS: Russian Academy of Sciences)H-Index: 3
view all 4 authors...
Abstract A new technological method for producing a nano-modifier for cement concretes from renewable source of hydrothermal solution using the processes of polycondensation of orthosilicic acid and ultrafiltration membrane concentration is proposed. According to the data of dynamic light scattering, tunneling electron microscopy, and low-temperature nitrogen adsorption, it is shown that in sol samples the average diameters of amorphous SiO2 nanoparticles can be varied in the range 10–100 nm, th...
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#1Vadim V. Potapov (RAS: Russian Academy of Sciences)H-Index: 5
#2Roman Fediuk (Far Eastern Federal University)H-Index: 18
Last. Denis Gorev (RAS: Russian Academy of Sciences)H-Index: 3
view all 3 authors...
Experiments were performed to obtain SiO2 sols, gels, and mesoporous nanopowders based on hydrothermal medium. To achieve this, polycondensation of orthosilicic acid (OSA) at certain pH and temperature, as well as ultrafiltration membrane concentration, sol–gel transition, and cryochemical vacuum sublimation were done. The dynamic light scattering, scanning and tunneling electron microscopy, low-temperature nitrogen adsorption, and others methods determined the physical and chemical characterist...
Source
#1S. A. ZhdanokH-Index: 6
#2V. V. PotapovH-Index: 1
Last. S. N. Leonovich (Białystok Technical University)H-Index: 1
view all 4 authors...
Experimental studies of several types of nanomaterials (nanosilica, nanocarbon) and comparison of the results of their applications in cement concrete have been carried out. It has been established that the characteristics of cement concrete modified by these nanomaterials depend on the content of the latter in concrete. The best results were obtained with an additive in which the said nanomaterials were used simultaneously.
Source
#1Vadim V. Potapov (RAS: Russian Academy of Sciences)H-Index: 5
#2Roman Fediuk (Far Eastern Federal University)H-Index: 18
Last. Denis Gorev (RAS: Russian Academy of Sciences)H-Index: 3
view all 3 authors...
The technological mode of obtaining amorphous SiO2 nanopowders based on hydrothermal solutions is proposed in this study. Polycondensation of orthosilicic acid as well as ultrafiltration membrane separation, and cryochemical vacuum sublimation were used. The characteristics of nanopowders were determined by tunneling electron microscopy, low-temperature nitrogen adsorption, X-ray diffraction, and small-angle X-ray scattering. The scheme allows to adjust density, particle diameters of nanopowders...
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#3Said Taibi (CNRS: Centre national de la recherche scientifique)H-Index: 6
AbstractGranular soil in construction of earth works can be solicited by hydrodynamic and mechanical forces. Fine particles constituting these soils may be eroded by the flow leading to a modification of their mechanical behaviour. Classically, the susceptibility of granular soils to internal erosion is assessed by internal stability criteria. In this paper, numerical modelling using discrete elements method is performed to study the mechanical behaviour of eroded soils on triaxial paths. Soils ...
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#1V.V. PotapovH-Index: 1
#2Yu.V. EfimenkoH-Index: 2
Last. D.S. GorevH-Index: 1
view all 3 authors...
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#1U. Sharma (Central Building Research Institute)H-Index: 9
#2Lok Pratap Singh (Central Building Research Institute)H-Index: 32
Last. Chi Sun Poon (PolyU: Hong Kong Polytechnic University)H-Index: 102
view all 4 authors...
The most interesting aspect of research related to chemical reaction during cement hydration is the fundamental principles underlying these reactions and the rate of reaction expressed as evolution of degree of hydration over the time. Presently, several additives are used by concrete technologists to improve the performance and service life of cementitious materials. Application of nanomaterials, especially silica nanoparticles (SNPs), in construction has brought a new revolution by improving t...
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#1Peng Zhang (Zhengzhou University)H-Index: 17
#2Qingfu Li (Zhengzhou University)H-Index: 6
Last. Yifeng Ling (Iowa State University)H-Index: 13
view all 5 authors...
An experimental study was conducted to investigate the effect ofnano-SiO2 and steel fiber content on the durability of concrete. Five different dosages of nano-SiO2 particles and five volume dosages of steel fiber were used. The durability of concretes includes permeability resistance, cracking resistance, carbonation resistance, and freezing-thawing resistance, and these were evaluated by the water permeation depth, number of cracks, total cracking area per unit area of the specimens, carbonati...
Source
#1V.V. PotapovH-Index: 1
#2Yu.V. EfimenkoH-Index: 2
Last. D.S. GorevH-Index: 1
view all 3 authors...
Source
#1U. Sharma (PolyU: Hong Kong Polytechnic University)H-Index: 1
#2Lok Pratap Singh (Central Building Research Institute)H-Index: 32
Last. Chi Sun Poon (PolyU: Hong Kong Polytechnic University)H-Index: 102
view all 4 authors...
Abstract The present work is focused on the effect of particle size of silica on its early age reactivity and its impact on C-S-H microstructure and mechanical strength at the early and later ages of hydration. Two different types of commercially available silica i.e. Elk-microsilica (Elk-Si) (100–300 nm) and colloidal nanosilica (CNS) (8–15 nm) were used for the study. The lime silica reaction was carried out with a C/S ratio 2.0 and the reaction was monitored in the first 24 h with a range of ...
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