Combined Effect of Silicon Dioxide and Titanium Dioxide Nanoparticles on Concrete Properties

Abstract

Nanoconcrete is an attractive research area because of its recent practical applications in building materials technologies. This study investigates the individual and combined effects of using nanoparticles in concrete mixtures as a cement substitute. Microscopic images are also used to determine changes in the microstructure of modified concrete in the present study. Concrete's thermal and mechanical properties, including thermal conductivity (k), specific heat capacity (C), thermal diffusivity (α), and compressive strength (σ), are the leading concrete characteristics examined. The current study used different percentages (0%, 1%, 3%, and 5%) of nano-SiO 2 , nano-TiO 2, and combined nano-SiO 2 /TiO 2 particles as cement substitutes for 7 and 28 days of curing to examine the characteristics of nanoconcrete compared to conventional concrete (CC). The results indicated that adding individual nanoparticles to CC could improve concrete's thermal and mechanical properties. Among the investigated nanomaterials (nano-SiO 2 , nano-TiO 2, and combined nano-SiO 2 /TiO 2 particles), nano-SiO 2 was superior in that context. The optimal thermal properties of nanoconcrete were achieved when 5% nano-SiO 2 (C-S5 specimen) was added. The k and α coefficients of sample C-S5 compared to the CC specimen were reduced by 65.6% and 80.3%, respectively, while the C coefficient was increased by 12.8%. Meanwhile, the optimal compressive strength coefficient of nanoconcrete was achieved when 3% nano-SiO 2 (C-S3 specimen) was added, where the compressive strength coefficient of sample C-S3 compared to sample CC was increased by 19.6%. In contrast, for the combined effect, the thermal properties of concrete were improved, but the compressive strength coefficient of concrete was reduced. Overall, the present experimental findings offer valuable information about the impact of nanotechnology on highperformance concrete to save energy in buildings.

Analysis and Optimization of Residential Elements from the Perspective of Multi-Child Families in the Yangtze River Delta Region

“…The digital platform creates optimal circumstances for the programmatic study of urban spatial challenges, allowing for the stratification and analysis of complex urban spatial problems, as well as the establishment of a cognitive, analytical, simulation, evaluation, and feedback process on cities and architecture [43,44]. The modular approach explores many options and solutions while offering reference solutions for urban issues [45,46]. IPA is rather specialized when it comes to studies on the demand side of urban housing.…”

Effect of titanium dioxide as nanomaterials on mechanical and durability properties of rubberised concrete by applying RSM modelling and optimizations

“…It provides a well-rounded approach that combines modelling flexibility, experimental efficiency, and interpretative capability. There are many experimental investigations performed on the TiO 2 as nanomaterials (Al-Rbaihat and Al-Marafi, 2023;Bunea et al, 2023;Mostafa et al, 2023;Rawat et al, 2023) and CR as replacement for sand in concrete individually (Shahjalal et al, 2023;Youssf et al, 2023;Aghamohammadi et al, 2024) but there is very limited research were accomplished on rubberised concrete mixed with TiO 2 as nanoscale particle. Therefore, this study aims to experimentally explore the integration of titanium dioxide as a nanomaterial into rubberized concrete.…”