INFLUENCE OF FINE ADDITIVES AND SURFACTANTS ON THE STRENGTH AND PERMEABILITY DEGREE OF CONCRETE

The results of studies to determine the effect of titanium dioxide nanoparticles (nanoTiO2), finely dispersed anatase crystalline titanium dioxide (anatazTiO2) and surface-active substances (surfactants) on the compressive strength, degree of permeability and thermal stability of concrete samples are presented. Adding particles of nanotitanium, anatase titanium and surfactants up to 2 % to cement accelerates the hydration process and increases the strength of concrete, and also has a strong effect on its microstructure. As a result of the studies, it is experimentally proved that the compressive strength of concrete increases with the addition of titanium dioxide (nanoTiO2) nanoparticles by 23.2 %, finely dispersed anatase crystalline titanium dioxide (anatazTiO2) by 21.7 % to 5 % concentration by weight. In addition, the introduction of these additives reduces the permeability of concrete. This is due to a decrease in the absorption of concrete by water with the addition of nanotitanium and anatase titanium. The introduction of additives from 1 % to 5 % by weight in concrete reduces the depth of chloride penetration by 10–15 times, compared with the control. The use of temperature-programmed desorption mass spectrometry (TPD-MS) method has shown that an increase in the percentage of TiO2 nanoparticles to 5 % in concrete mixtures correlates with an increase in microporosity and dispersion level of these mixtures, which causes a shift in the peaks of intense gas evolution from the samples when heated to the side low temperatures (for example, carbon dioxide CO2). The resulting concrete samples are planned to be used for the manufacture of floors in livestock buildings. The injected additives are selected because they are not toxic substances and, in contact with the biological environment of livestock buildings (urine, feces), will not react with them

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Titanium dioxide nanoparticles as multifunctional surface-active materials for smart/active nanocomposite packaging films

Advances in Colloid and Interface Science ◽

10.1016/j.cis.2021.102593 ◽

2021 ◽

pp. 102593

Author(s):

Mahmood Alizadeh Sani ◽

Mohammad Maleki ◽

Hadi Eghbaljoo-Gharehgheshlaghi ◽

Arezou Khezerlou ◽

Esmaeil Mohammadian ◽

...

Keyword(s):

Titanium Dioxide ◽

Titanium Dioxide Nanoparticles ◽

Active Materials ◽

Packaging Films ◽

Surface Active

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Effect of Silanized Silicon Dioxide and Titanium Dioxide Nanoparticles Loading on the Compressive Strength of Prepared Composite Core Material

Al-Azhar Dental Journal for Girls ◽

10.21608/adjg.2019.6117.1053 ◽

2019 ◽

Vol 0 (0) ◽

pp. 0-0

Author(s):

Mai Elbatanony ◽

Sayed Saniour ◽

Maha Niazy ◽

Inas Motawae ◽

Magdy Sabaa ◽

...

Keyword(s):

Compressive Strength ◽

Titanium Dioxide ◽

Silicon Dioxide ◽

Titanium Dioxide Nanoparticles ◽

Core Material ◽

Prepared Composite

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Titanium Dioxide Nanoparticles and Cetylpyridinium Chloride Enriched Glass-Ionomer Restorative Cement: A Comparative Study Assessing Compressive Strength and Antibacterial Activity

Journal of Clinical Pediatric Dentistry ◽

10.17796/1053-4625-43.1.8 ◽

2019 ◽

Vol 43 (1) ◽

pp. 42-45

Author(s):

Nida Hamid ◽

Ravishankar Lingesha Telgi ◽

Amit Tirth ◽

Vaibhav Tandon ◽

Smita Chandra ◽

...

Keyword(s):

Compressive Strength ◽

Antibacterial Activity ◽

Titanium Dioxide ◽

Tio2 Nanoparticles ◽

Titanium Dioxide Nanoparticles ◽

Cetylpyridinium Chloride ◽

Testing Machine ◽

Glass Ionomer Cement ◽

Glass Ionomer ◽

Significant Difference

Objective: To evaluate the addition of titanium dioxide (TiO2) nanoparticles and cetylpyridinium chloride (CPC) on the compressive strength and antibacterial activity of conventional glass-ionomer cement (GIC). Study design: TiO2 nanoparticles enriched GIC was prepared by adding 3% TiO2 nanoparticles (w/w) into the powder component of conventional GIC. CPC containing GIC was developed by incorporating 1% CPC (w/w) into conventional GIC powder. Samples were segregated into three groups: GIC with 3% TiO2 nanoparticles, GIC with 1% CPC and unmodified conventional GIC. Compressive strength was assessed using the universal testing machine on cylindrical specimens made from each material. Antibacterial activity was assessed by measuring inhibition zones on Mitis Salivarius Bacitracin (MSB) agar inoculated with pure strain of Streptococcus mutans (S. mutans). Results: GIC containing TiO2 nanoparticles exhibited significantly greater compressive strength as compared with CPC and conventional GIC groups (P < 0.01). However, there was no significant difference between the compressive strengths of CPC and conventional GIC group (P >0.05). Antibacterial activity was significantly greater for TiO2 group than conventional GIC (P <0.05). CPC increased the antibacterial activity of conventional GIC, though not significantly. Conclusion: The addition of 3% TiO2 nanoparticles improves the compressive strength of GIC as well as its antibacterial activity against S. mutans.

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Applied Research Glass Ionomer Cement with TiO2 Nanoparticles in Orthodontic Treatment

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2021.18681 ◽

2021 ◽

Vol 21 (2) ◽

pp. 1032-1041

Author(s):

Jiajie Ren ◽

Zhen Du ◽

Jiang Lin

Keyword(s):

Compressive Strength ◽

Titanium Dioxide ◽

Antibacterial Effect ◽

Titanium Dioxide Nanoparticles ◽

Glass Ionomer Cement ◽

Antibacterial Properties ◽

Surface Hardness ◽

Glass Ionomer ◽

Adhesion Properties ◽

Ionomer Cement

In orthodontics treatment, scholars have tried to introduce nano antibacterial materials into the materials used in orthodontics to reduce the occurrence of enamel demineralization, caries and periodontitis. The experiment investigated the effect of adding titanium dioxide nanoparticles in different proportions on the flexural strength, compressive strength, surface hardness, tribological properties, adhesion properties, fluorine release properties and antibacterial properties of glass ionomer cement. The effect of water cement on orthodontics, the experiment added different proportions of titanium dioxide nanoparticles to traditional glass ion cement, which greatly improved the mechanical strength of glass ion cement, and significantly improved the antibacterial effect of glass ion cement, bending strength, compressive strength and surface hardness. The addition of titanium dioxide nanoparticles produced a significant antibacterial effect on Streptococcus mutants. Nano-TiO2 glass ionomer cement has a significant effect on orthodontics, and the damage to patients’ teeth is significantly lower, which is worthy of clinical popularization.

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