Comparative study of the effect of silica nanoparticles and polystyrene on the properties of concrete

Saleh, Alaa N.; Attar, Alyaa A.; Algburi, Sameer; Ahmed, Omer K.

doi:10.1016/j.rinma.2023.100405

Cited by 2 publications

(4 citation statements)

References 24 publications

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“…The larger the air pores ratio, the lighter the specimen and the lower its k coefficient. Similar observations can be found in previous studies (Ren et al, 2018;Kaya and Kar, 2016;Saleh et al, 2023). Additionally, the density of concrete represents its compactness and porosity.…”

Section: Thermal Conductivity (K Coefficient) Resultssupporting

confidence: 89%

“…The average value was regarded as the k coefficient value of the concrete specimen. The k coefficient of the concrete specimens was evaluated as (Saleh et al, 2023):…”

Section: Thermal Conductivity (K Coefficient) Testmentioning

confidence: 99%

“…This result was expected because the spaces in concrete will be filled with nanomaterials that enhance the density and reduce the porosity. In another work, Saleh et al (2023) concluded that replacing cement in a concrete mixture with 0.8% polystyrene granules and 3.0% nano-SiO 2 enhanced the concrete's thermal and compressive strengths. The study also found that adding only nano-SiO 2 has provided the highest compressive strength coefficient compared to using polystyrene, which has decreased compressive strength coefficient.…”

Section: Introductionmentioning

confidence: 98%

“…In addition, reduced porosity in concrete results in a reduced k coefficient. A number of researchers (Reddy et al, 2022;Selvasofia et al, 2021;Ren et al, 2018;Jittabut, 2015;Saleh et al, 2023) have recently investigated the effect of nanoparticle materials in enhancing the thermal and mechanical properties of concrete.…”

Section: Introductionmentioning

confidence: 99%

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

Al-Rbaihat,

Al-Marafi

2023

J. Ecol. Eng.

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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.

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Section: Thermal Conductivity (K Coefficient) Resultssupporting

confidence: 89%

“…The average value was regarded as the k coefficient value of the concrete specimen. The k coefficient of the concrete specimens was evaluated as (Saleh et al, 2023):…”

Section: Thermal Conductivity (K Coefficient) Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%