Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mechanical activation effect on the biostability of modified cement compositions
https://orcid.org/0000-0001-8879-1190
Highlights The mechanical activation increases the cement composition biostability. The laboratory installation was designed for test on biostability of materials. Type of fuctionalisation CNT had an impact on biostability of cement composition.
Abstract The creation of materials with high strength, durability, and biostability is a relevant development area for modern building materials science. This paper studies a number of modified cement compositions obtained by the mechanical activation of the vortex layer device binder. A superplasticizer and carbon nanotubes of various structure and functionality were used as modifiers. The cement composition was determined in a laboratory kinetic unit designed by the authors. It is found that the biostability coefficient values of the cement composition samples obtained by the mechanical activation of the binder and with the introduction of the superplasticizer are 13% higher than the same control composition value. It is indicated that the additional introduction of single and multilayer carbon nanotubes increases the cement composition biostability by 50%. It is found that the highest biostability values are observed in cement compositions obtained by the mechanical activation of the binder with the combined introduction of the superplasticizer and multilayer (MWCNT) «Graphistrength» carboxyl-functionalized (–COOH) nanotubes. The x-ray phase analysis method found that during the exposure of the cement composition samples under study in a model citric acid medium, the portlandite is carbonized with calcite formed which causes a decrease in the compression and bending strength of the cement composition samples.
Mechanical activation effect on the biostability of modified cement compositions
https://orcid.org/0000-0001-8879-1190
Highlights The mechanical activation increases the cement composition biostability. The laboratory installation was designed for test on biostability of materials. Type of fuctionalisation CNT had an impact on biostability of cement composition.
Abstract The creation of materials with high strength, durability, and biostability is a relevant development area for modern building materials science. This paper studies a number of modified cement compositions obtained by the mechanical activation of the vortex layer device binder. A superplasticizer and carbon nanotubes of various structure and functionality were used as modifiers. The cement composition was determined in a laboratory kinetic unit designed by the authors. It is found that the biostability coefficient values of the cement composition samples obtained by the mechanical activation of the binder and with the introduction of the superplasticizer are 13% higher than the same control composition value. It is indicated that the additional introduction of single and multilayer carbon nanotubes increases the cement composition biostability by 50%. It is found that the highest biostability values are observed in cement compositions obtained by the mechanical activation of the binder with the combined introduction of the superplasticizer and multilayer (MWCNT) «Graphistrength» carboxyl-functionalized (–COOH) nanotubes. The x-ray phase analysis method found that during the exposure of the cement composition samples under study in a model citric acid medium, the portlandite is carbonized with calcite formed which causes a decrease in the compression and bending strength of the cement composition samples.
Mechanical activation effect on the biostability of modified cement compositions
https://orcid.org/0000-0001-8879-1190
Highlights The mechanical activation increases the cement composition biostability. The laboratory installation was designed for test on biostability of materials. Type of fuctionalisation CNT had an impact on biostability of cement composition.
Abstract The creation of materials with high strength, durability, and biostability is a relevant development area for modern building materials science. This paper studies a number of modified cement compositions obtained by the mechanical activation of the vortex layer device binder. A superplasticizer and carbon nanotubes of various structure and functionality were used as modifiers. The cement composition was determined in a laboratory kinetic unit designed by the authors. It is found that the biostability coefficient values of the cement composition samples obtained by the mechanical activation of the binder and with the introduction of the superplasticizer are 13% higher than the same control composition value. It is indicated that the additional introduction of single and multilayer carbon nanotubes increases the cement composition biostability by 50%. It is found that the highest biostability values are observed in cement compositions obtained by the mechanical activation of the binder with the combined introduction of the superplasticizer and multilayer (MWCNT) «Graphistrength» carboxyl-functionalized (–COOH) nanotubes. The x-ray phase analysis method found that during the exposure of the cement composition samples under study in a model citric acid medium, the portlandite is carbonized with calcite formed which causes a decrease in the compression and bending strength of the cement composition samples.
Mechanical activation effect on the biostability of modified cement compositions
Stroganov, Victor (Autor:in) / Sagadeev, Eugene (Autor:in) / Ibragimov, Ruslan (Autor:in) / Potapova, Ludmila (Autor:in)
17.02.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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