Investigation of the Role of Nano-Titanium on Corrosion and Thermal Performance of Structural Concrete with Macro-Encapsulated PCM

Abstract

The present study aims to investigate the impact of thermal energy storage aggregate (TESA) and nano-titanium (NT) on properties of structural concrete. TESA was made of scoria encapsulated with phase change materials (PCMs). Coarse aggregates were replaced by TESA at 100% by volume of aggregate and NT was added at 5% by weight of cement. Compressive strength, probability of corrosion, thermal performance, and microstructure properties were studied. The results indicated that the presence of TESA reduced the compressive strength of concrete, although the strength was still high enough to be used as structural concrete. The use of TESA significantly improved the thermal performance of concrete, and slightly improved the resistance of corrosion in concrete. The thermal test results showed that TESA concrete reduces the peak temperature by 2 °C compared to the control. The addition of NT changed the microstructure of concrete, which resulted in higher compressive strength. Additionally, the use of NT further enhanced the thermal performance of TESA concrete by reducing the probability of corrosion remarkably. These results confirmed the crucial role of NT in improving the permeability and the thermal conductivity of mixtures containing PCM. In other words, the charging and discharging of TESA was enhanced with the presence of NT in the mixture.

Attempts to Improve the Subsurface Properties of Horizontally-Formed Cementitious Composites Using Tin(II) Fluoride Nanoparticles

“…The two first samples R-0 and F-0.5 lost 12.85 cm 3 Studies performed in [30] show that with the addition of 1.5% of ZrO 2 , TiO 2 , Al 2 O 3 , or Fe 3 O 4 nanoparticles, the mechanical properties (compressive strength and flexural tensile strength) and the durability of concrete can be increased. The higher results of the compressive strength values obtained for the cement-based materials were achieved with the addition of nano-SiO 2 [31] or nano-TiO 2 [32]. However, the results presented in Figure 8 show that the mechanical properties of cementitious composites did not change with the addition of SnF 2 nanoparticles.…”

Sandblasted and Acid Etched Titanium Dental Implant Surfaces Systematic Review and Confocal Microscopy Evaluation

“…The implants have characteristics related to the materials with which they are made and to their geometry, macroscopic and microscopic. The material normally used is commercially pure titanium, this material has characteristics of biocompatibility, low density, electrochemical stability, high mechanical strength and sufficient rigidity [23,24,25,26,27,28,29]. The macroscopic implant geometries evaluate macroscopic differences in the shape of dental implants.…”

Experimental Investigation of Electrochemical Corrosion and Chloride Penetration of Concrete Incorporating Colloidal Nanosilica and Silica fume

“…The microparticles not only fill the pores but also participate in the pozzolanic reaction resulting in occupation of pores by CSH gel. In addition, the reaction of the chloride ions with these hydration products limits their concentration and controls the probability of corrosion [24]. However, at increased dosage of SF up to 16% results in mutual friction of the microparticles and results in slightly increasing the chances of formation of weak interfacial zones leading to progression of electrochemical corrosion reaction [25].…”