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A platform for research: civil engineering, architecture and urbanism
Mechanical properties cement based composites modified with nano-Fe3O4/SiO2
https://orcid.org/0000-0003-0840-5048
Highlights FeO4/SiO2 nanoparticles were incorporated to cement composites. Fe3O4/SiO2 increases the amount of CH/C-S-H phase in the cement matrix. Inclusion of Fe3O4/SiO2 improved the Young Modulus of cement composites.
Abstract The nanomaterials are being increasingly used for modification of the cement composites properties. The aim of the research was determination of optimum content of the core-shell type Fe3O4/SiO2 nanoparticles in the cement paste for obtaining the tight structure of the high-strength paste. For this purpose, such investigation techniques as atomic force microscope (AFM) and nanoindentation were employed. The significant effect of the silica shell on the increase of the porous phase in the tested composite has been found. Also, an increase of amount of high-stiff C-S-H phase was observed, which is a result of using of the nanoadmixture. The AFM method turned out to be effective for determination of the limit amounts of the nanoadmixture for the further investigation. The nanoindentation has brought information about the changes in the quantity and quality (stiffness) of the particular C-S-H phases, caused by modification of the tested pastes with various amounts of nano-Fe3O4/SiO2. The use of 3% of nano-Fe3O4/SiO2 admixture in the cement paste together with a superplasticizer for reduction of the excessive porosity appeared to be an optimum solution in the case of the tested composites, as it has been demonstrated in the further durability tests.
Mechanical properties cement based composites modified with nano-Fe3O4/SiO2
https://orcid.org/0000-0003-0840-5048
Highlights FeO4/SiO2 nanoparticles were incorporated to cement composites. Fe3O4/SiO2 increases the amount of CH/C-S-H phase in the cement matrix. Inclusion of Fe3O4/SiO2 improved the Young Modulus of cement composites.
Abstract The nanomaterials are being increasingly used for modification of the cement composites properties. The aim of the research was determination of optimum content of the core-shell type Fe3O4/SiO2 nanoparticles in the cement paste for obtaining the tight structure of the high-strength paste. For this purpose, such investigation techniques as atomic force microscope (AFM) and nanoindentation were employed. The significant effect of the silica shell on the increase of the porous phase in the tested composite has been found. Also, an increase of amount of high-stiff C-S-H phase was observed, which is a result of using of the nanoadmixture. The AFM method turned out to be effective for determination of the limit amounts of the nanoadmixture for the further investigation. The nanoindentation has brought information about the changes in the quantity and quality (stiffness) of the particular C-S-H phases, caused by modification of the tested pastes with various amounts of nano-Fe3O4/SiO2. The use of 3% of nano-Fe3O4/SiO2 admixture in the cement paste together with a superplasticizer for reduction of the excessive porosity appeared to be an optimum solution in the case of the tested composites, as it has been demonstrated in the further durability tests.
Mechanical properties cement based composites modified with nano-Fe3O4/SiO2
https://orcid.org/0000-0003-0840-5048
Highlights FeO4/SiO2 nanoparticles were incorporated to cement composites. Fe3O4/SiO2 increases the amount of CH/C-S-H phase in the cement matrix. Inclusion of Fe3O4/SiO2 improved the Young Modulus of cement composites.
Abstract The nanomaterials are being increasingly used for modification of the cement composites properties. The aim of the research was determination of optimum content of the core-shell type Fe3O4/SiO2 nanoparticles in the cement paste for obtaining the tight structure of the high-strength paste. For this purpose, such investigation techniques as atomic force microscope (AFM) and nanoindentation were employed. The significant effect of the silica shell on the increase of the porous phase in the tested composite has been found. Also, an increase of amount of high-stiff C-S-H phase was observed, which is a result of using of the nanoadmixture. The AFM method turned out to be effective for determination of the limit amounts of the nanoadmixture for the further investigation. The nanoindentation has brought information about the changes in the quantity and quality (stiffness) of the particular C-S-H phases, caused by modification of the tested pastes with various amounts of nano-Fe3O4/SiO2. The use of 3% of nano-Fe3O4/SiO2 admixture in the cement paste together with a superplasticizer for reduction of the excessive porosity appeared to be an optimum solution in the case of the tested composites, as it has been demonstrated in the further durability tests.
Mechanical properties cement based composites modified with nano-Fe3O4/SiO2
Horszczaruk, Elzbieta (author) / Aleksandrzak, Małgorzata (author) / Cendrowski, Krzysztof (author) / Jędrzejewski, Roman (author) / Baranowska, Jolanta (author) / Mijowska, Ewa (author)
2020-03-29
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2016
| British Library Online Contents | 2016