Express Nano Letters (ENL) is an international peer-reviewed, Open Access scientific journal which publishes every three months (four issues per year). This journal has been founded in 2019 and aims to publish research original and review papers on nanoscale materials and their synthesis and application in science and technology.
Today, one of the main aspects of nanotechnology is its interdisciplinary nature and the interaction of this science with concrete science which can create a turning point in the construction industry. The goal of nanoscale concrete research is to discover a new generation of high-performance building materials with new and different properties than traditional materials. The present study aims to investigate and compare the mechanical and strength properties of cement concrete samples and concrete samples mixed with nanotubes. Also, the compressive strength changes in three mixtures with 0.045, 0.15, and 0.2 percentage of the nanotube to cement weight in the concrete matrix is another goal that was pursued in this study. By performing the necessary tests based on the relevant standards, different ratio of nanomaterials in the main concrete mix design were compared and analyzed. In all tests, better performance of nano concrete than cement concrete was observed. Averagely, at 90 days of age, a more than 30% increase in compressive strength in carbon nanotube concrete samples was recognized in comparison with the concrete control samples.
In this paper, the destruction and removal of a direct Reactive Red 141 dye was carried out using nanoparticles of titanium dioxide under ultraviolet light (UV12W). In this research, the effect of parameters of UV irradiation time and pH on the amount of removing and color degradation have been investigated. The results indicate that, with increasing radiation time, the percentage of degradation increases and with increasing pH the percentage of degradation is reduced. In order to determine the percentage of degradation, an absorption spectrophotometer was used.
Express Nano Letters (ENL) is an international peer-reviewed, Open Access scientific journal which publishes every three months (four issues per year). This journal has been founded in 2019 and aims to publish research original and review papers on nanoscale materials and their synthesis and application in science and technology.
Today, one of the main aspects of nanotechnology is its interdisciplinary nature and the interaction of this science with concrete science which can create a turning point in the construction industry. The goal of nanoscale concrete research is to discover a new generation of high-performance building materials with new and different properties than traditional materials. The present study aims to investigate and compare the mechanical and strength properties of cement concrete samples and concrete samples mixed with nanotubes. Also, the compressive strength changes in three mixtures with 0.045, 0.15, and 0.2 percentage of the nanotube to cement weight in the concrete matrix is another goal that was pursued in this study. By performing the necessary tests based on the relevant standards, different ratio of nanomaterials in the main concrete mix design were compared and analyzed. In all tests, better performance of nano concrete than cement concrete was observed. Averagely, at 90 days of age, a more than 30% increase in compressive strength in carbon nanotube concrete samples was recognized in comparison with the concrete control samples.
In this paper, the destruction and removal of a direct Reactive Red 141 dye was carried out using nanoparticles of titanium dioxide under ultraviolet light (UV12W). In this research, the effect of parameters of UV irradiation time and pH on the amount of removing and color degradation have been investigated. The results indicate that, with increasing radiation time, the percentage of degradation increases and with increasing pH the percentage of degradation is reduced. In order to determine the percentage of degradation, an absorption spectrophotometer was used.