Transport properties of nano-silica contained self-consolidating concrete

Ghafoori, Nader; Moradi, Borhan; Najimi, Meysam; Hasnat, Ariful

doi:10.1016/j.conbuildmat.2021.124060

Cited by 13 publications

(3 citation statements)

References 20 publications

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“…17,18 Among them, NS is undoubtedly the most popular nanomaterial used in SCC, mainly because of its amorphous structure, high purity of silicon dioxide (SiO 2 ) (up to 99%), high specific surface area (SSA), and exhibits excellent pozzolanic properties. [19][20][21] Studies have shown that NS is widely used in concrete to improve the microstructure, mechanical properties and durability. [22][23][24][25] In the past decade, there have been researches on the application of nano-materials in SCC, but at present, a few studies 26,27 reviewed NS together with other nanoparticles, hence lesser focus specifically on the effect of NS on the performance of SCC.…”

Section: Introductionmentioning

confidence: 99%

“…Common nanomaterials used in concrete include nano silica (NS), nano magnesium oxide (MgO), nano iron oxide (Fe 2 O 3 ), nano titanium oxide (TiO 2 ), nano copper oxide (CuO), nano zinc oxide (ZnO), nano calcium carbonate (CaCO 3 ) and carbon nanotubes 17,18 . Among them, NS is undoubtedly the most popular nanomaterial used in SCC, mainly because of its amorphous structure, high purity of silicon dioxide (SiO 2 ) (up to 99%), high specific surface area (SSA), and exhibits excellent pozzolanic properties 19–21 . Studies have shown that NS is widely used in concrete to improve the microstructure, mechanical properties and durability 22–25 …”

Section: Introductionmentioning

confidence: 99%

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Recent developments in utilization of nano silica in self‐compacting concrete: A review

Wang

Yang

Chu

et al. 2023

Structural Concrete

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Self‐compacting concrete (SCC) is a type of flowable, high‐strength and high‐performance concrete in the construction field, which can flow and compact under its own weight. The damage of concrete is often caused by internal microstructural defects. Nano silica (NS) has excellent pozzolanic properties, and with an appropriate content of NS as auxiliary cementing material, it can promote the generation of C‐S‐H gels in addition to serve as internal filler, thus improves the micro‐scale defects in concrete. This paper extracts data from studies published over the last decade which focus on the application of NS in SCC and discusses the similarities and differences between the studies. Ultimately, a systematic review of the physical and chemical characteristics of NS, and the effect of NS on the workability, mechanical and durability properties of SCC is presented. Based on the review, the most common NS content is 0%–6%, where the negative effect of 0%–6% NS on the workability of SCC can be controlled by increasing the dosage of superplasticizer. The NS content of 2%–3% is optimum for improving the mechanical strength and the ability of SCC to resist water permeability, corrosion, acid and sulfate attacks, elevated temperature as well as shrinkage.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent developments in utilization of nano silica in self‐compacting concrete: A review

Wang

Yang

Chu

et al. 2023

Structural Concrete

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“…Concerning chloride ion permeability in concrete, recent studies have investigated the effect of Nanoparticles on chloride penetration [19,[32][33][34][35][36]. Li [33] added nano-SiO 2 , nano-CaCO 3 , and multi-walled carbon nanotubes to reinforced concrete and concluded that nanomaterials significantly decrease the chloride diffusion coefficients.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of High Strength Concrete Containing Nano SiO2 Made from Rice Husk Ash in Southern Vietnam

Tran

Phan

2021

Crystals

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This paper presents the experimental results of the production of Nano-SiO2 (NS) from rice husk ash (RHA) and the engineering properties of High Strength Concrete (HSC) containing various NS contents. Firstly, the mesoporous silica nanoparticles were effectively modulated from RHA using NaOH solution, and subsequently precipitated with HCl solution until the pH value reached 3. The optimum synthesis for the manufacture of SiO2 nanoparticles in the weight ratio of RHA/NaOH was 1:2.4, and the product was calcined at 550 °C for 2 h. The EDX, XRD, SEM, TEM, FT-IR, and BET techniques were used to characterize the NS products. Results revealed that the characteristics of the obtained NS were satisfactory for civil engineering materials. Secondly, the HSC was manufactured with the aforementioned NS contents. NS particles were added to HSC at various replacements of 0, 0.5, 1.0, 1.5, 2.0, and 2.5% by the mass of the binder. The water-to-binder ratio was remained at 0.3 for all mixes. The specimens were cured for 3, 7, 28, 25 days under 25 ± 2 °C and a relative humidity of 95% before testing compressive and flexural strengths. Chloride ion permeability was investigated at 28 and 56 days. Results indicated that the addition of NS dramatically enhanced compressive strength, flexural strength, chloride ion resistance, and reduced chloride ion permeability compared to control concrete. The optimal NS content was found at 1.5%, which yielded the highest strength and lowest chloride ion permeability. Next, the development of flexural and compressive strengths with an age curing of 3–28 days can be analytically described by a logarithmic equation with R2 ≥ 0.74. The ACI code was used, and the compressive strength at t-day was determined based on 28 days with R2 ≥ 0.95. The study is expected to solve the redundancy of waste RHA in southern Vietnam by making RHA a helpful additive when producing high-strength concrete and contributing meaningfully to a sustainable environment.

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Coupled effect of the freeze-thaw cycles and salt erosion on the performance of concretes modified with nanoparticles

Lu,

Pei,

Zhang

et al. 2024

Cold Regions Science and Technology

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Transport properties of nano-silica contained self-consolidating concrete

Cited by 13 publications

References 20 publications

Recent developments in utilization of nano silica in self‐compacting concrete: A review

Recent developments in utilization of nano silica in self‐compacting concrete: A review

Mechanical Properties of High Strength Concrete Containing Nano SiO2 Made from Rice Husk Ash in Southern Vietnam

Coupled effect of the freeze-thaw cycles and salt erosion on the performance of concretes modified with nanoparticles

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