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Nanomaterials-Based Self-Healing Cementitious Materials
Published in Ghasan Fahim Huseien, Iman Faridmehr, Mohammad Hajmohammadian Baghban, Self-Healing Cementitious Materials, 2022
Ghasan Fahim Huseien, Iman Faridmehr, Mohammad Hajmohammadian Baghban
Using materials with a particle size less than 500 nm in concrete production as admixture or part cement replacement is called nanoconcrete. It was shown that the strength of normal concrete tends to be enhanced with the inclusion of nanoparticles. The bulk properties and packing model structure of concrete can remarkably be improved via the incorporation of nanoparticles. Nanoparticles act as excellent filling agents through the refinement of intersection zones in cementitious materials and production of high density concrete. The manipulation or modification of these nanoparticles in the cement matrix can render a new-fangled nanostructure [22–24]. General deficiencies in the microstructures of concretes including voids, micro-porosity, and corrosion originating from the reaction of alkaline silica can be discarded. The advancement of nanomaterials occurred due to their characteristics as new binding agents with particle sizes much tinier than traditional OPC. This property enhances the hydration gel product by imparting a neat and solid structure. Also, by using a blend of filler and extra chemical reaction in the hydration scheme, high performing novel nanoconcrete with enhanced durability can be achieved.
Chemical, Physical, and Mineral Properties of Ceramic Wastes
Published in Kwok Wei Shah, Ghasan Fahim Huseien, Recycled Ceramics in Sustainable Concrete, 2020
Kwok Wei Shah, Ghasan Fahim Huseien
Using materials with a particle size less than 500 nm in concrete production as admixture or part cement replacement called nanoconcrete. It was shown that the strength of normal concrete tends to enhance with the inclusion of nanoparticles. The bulk properties and packing model structure of concrete can remarkably be improved via the incorporation of nanoparticles. Nanoparticles act as excellent filling agents through the refinement of intersection zones in cementitious materials and production of high-density concrete. The manipulation or modification of these nanoparticles in the cement matrix can render new-fangled nanostructures [18,42,43].
A practical model for predicting the dry shrinkage strain and creep coefficient of concrete containing graphene oxide nanosheets
Published in Journal of Sustainable Cement-Based Materials, 2023
Mohammad Javad Mahmoodi, Masoumeh Khamehchi, Mohammad Safi
Figure 11 illustrates the dependency of the creep coefficient on the GON content. It is found that, by an increase in the GON content, the creep coefficient of nanoconcrete decreases. It can be seen from the figure that the creep coefficient of GOSC1 and GOSC2 samples are smaller than that of the PSC sample, so that compared to the creep coefficient of plain concrete, the creep coefficient decreases about 13% and 18% for 0.02 and 0.08 respectively. This behavior indicates that the adding GON decreases the creep coefficient of nanoconcrete because the GONs improve the compressive strength of the concrete. In other words, the higher dosage of the GON makes the higher compressive strength which leads to the smaller values of creep coefficient. The other physical reason is that through the template effect and self-assembly effect in the cement hydration process, the GON forms a compact microstructure, and transfers the crack energy into the cement matrix. It restrains the opening and propagation of microcracks, and this leads to the smaller creep coefficient of nanoconcrete as the dosage of GON increases. The results are consistent with those reported in Ref. [17].