Enhanced biodeterioration and biofouling resistance of nanoparticles and inhibitor admixed fly ash based concrete in marine environments

Development of Colloidal Nanosilver as a High-Workability Nanoadditive for Cement Composites: A Mechanistic Approach

“…To enable a comparison of results, the reported replacement dosage of cAgNPs was scaled to match the replacement dosage of SiNPs. The effect of inclusion of SiNPs and cAgNPs on flowability measured as consistency and setting time of cement paste is studied using Vicat apparatus in accordance with ASTM C187− 16 addition to paste, flow measurements are also performed on mortar and concrete specimens using a flow table test in accordance with ASTM C230/IS 5512:1983. The flow percentage computed is determined as the ratio of change in flow to the initial flow diameter.…”

“…5−9 The adoption of microsilica and subsequently nanosilica (SiNPs) has been attempted to exploit the benefits of improved packing density and pozzolanic reactivity of the material. 10−13 In addition to SiNPs, a wide range of NPs including Al 2 O 3 , 14 TiO 2 , 15 Fe 2 O 3 , 16 CaCO 3 , 17 CuO, 18 etc., have been explored to improve the mechanical, thermal, and electrical properties of cement systems. Of the above, SiNPs on account of their superior pozzolanic and microstructure properties have received wider attention from the researchers.…”

“…The application of nanoparticles (NPs) in concrete and its potential benefits for improved strength and durability performance are well acknowledged. − This stems from the fact that the application of supplementary cementitious materials (SCM) finer than cement and the resulting improvements in strength and durability increase with increasing fineness of SCM, which is attributed to packing density enhancement and reduction of calcium hydroxide (CH) content. − The adoption of microsilica and subsequently nanosilica (SiNPs) has been attempted to exploit the benefits of improved packing density and pozzolanic reactivity of the material. − In addition to SiNPs, a wide range of NPs including Al 2 O 3 , TiO 2 , Fe 2 O 3 , CaCO 3 , CuO, etc., have been explored to improve the mechanical, thermal, and electrical properties of cement systems. Of the above, SiNPs on account of their superior pozzolanic and microstructure properties have received wider attention from the researchers.…”

Synergistic Effect of Combined Polymorphs Anatase-Rutile Nano-Modified Lightweight Concrete on Photocatalytic Reduction of NOx, Self-Cleaning Performance, and Antimicrobial Properties

“…The results showed that an increase in the addition of nano-titanium dioxide by up to 5 wt % increases the mixture's ability to resist fungi and algae growth on the sample's surface. Furthermore, the enhanced biodeterioration and biofouling resistance seen in concrete with the addition of combined nano-TiO 2 and nano-CaCO 3 was observed in studies conducted by Harilal et al [56]. In the case of lightweight concrete, which can be applied as a facade material, it is crucial to prevent the occurrence of biofouling by microorganisms due to the risk of material biodegradation.…”

Visible light antibacterial potential of cement mortar incorporating Cu-ZnO/g-C3N4 nanocomposites

“…It is known that the inherent porous structure of concrete creates a favorable environment for microbial colonization. 1 In the microorganisms corroding concrete, the dominant microorganisms are sulfur bacteria, commonly known as sulfur-oxidizing bacteria (SOB). It can oxidize sulfur alone or sulfur-containing substances into biological sulfuric acid.…”