Fresh and Hardened Properties of Nano Self-Compacting Concrete with Micro and Nano Silica

Hameed, Mohammed H.; Abbas, Zena K.; Al‐Ahmed, Ali Hussein Ali

doi:10.1088/1757-899x/671/1/012079

Cited by 14 publications

(4 citation statements)

References 5 publications

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“…There are some differences in the chemical composition between CNS and NS. The purity of NS is generally higher (up to 99%), while the SiO 2 content in most CNS is only about 24.5%–50.5% 65,66 …”

Section: Charcteristics Of Ns and Its Influencementioning

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: Charcteristics Of Ns and Its Influencementioning

confidence: 99%

“…The purity of NS is generally higher (up to 99%), while the SiO 2 content in most CNS is only about 24.5%-50.5%. 65,66…”

Section: Physical and Chemical Propertiesmentioning

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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“…This is achieved by forming a thin water film, effectively reducing the rate of self-desiccation to an ideal level. [18,[29][30][31].…”

Section: Introductionmentioning

confidence: 99%

"Exploring the Effects of Self-Curing Techniques on the Characteristics of Self-Compacting Concrete "

Verma,

Meena,

Khan

et al. 2023

Preprint

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Self-compacting concrete is essential for vertical structures due to high reinforcement and usage of pumps for transporting the concrete at the working site. SCC is mainly influenced by self-curing for arid areas. To explore the SCC (Self-Compacting Concrete) mixture and condition influencing the self-curing condition were determined using the experimental procedure. Determination of various parameters was done using T50 slump flow, V-funnel, L-box-box, J ring test, compressive strength, splitting tensile strength, and flexural strength test. After the experimental investigation, it shows that if the dose if the dosage of superplasticizer (SNF%) increases, it will improve the concrete mixture's different properties, such as flowability and ability to pass. Higher water-to-cement ratios (w/c) generally result in enhanced flowability and stability. Mixture 9 (SNF 0.35, w/c 0.5) demonstrates favourable results across all parameters, indicating excellent flowability and stability. Mixture 9 (SNF 0.35, w/c 0.5) also shows favourable flowability and stability characteristics. Lower concentrations, such as 0.5%, may have a positive effect up to a certain point but might not provide sustained improvement over the curing period. On the other hand, concentrations of 1% and 2% demonstrated consistent and significant enhancement in strength throughout the 28 days. It is found that the higher concentrations of PEG 4000 may be more effective in improving the material strength.

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“…All mixtures' hardened properties, including compressive strength, elastic modulus, and tensile strength, were calculated. Compared to the reference mixture, the use of CNS increased compressive strength overall by an average of 41% over 28 days [7]. LWSCC (lightweight self-compacting concrete) is expected to provide great workability without segregation and high durability while being lighter.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Nano-Silica on Some Properties of Light Weight Self-Compacting Concrete Aggregate

Ali,

Awad

2023

E3S Web Conf.

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Lightweight concrete (LWC) has been used successfully in building constructions for many years due to its physical properties and its lightweight with high thermal insulation and durability. Recently, this work was done on a new type of concrete: lightweight self-compacting concrete (LWSCC) that combines the feature of lightweight and self-compacting concrete simultaneously. In this study, light expanded clay aggregate (LECA) was used as coarse aggregate in (LWSCC) mixtures, using nano-silica as a partial replacement of cement with three percent (0.5, 0.75, and 1%) by mass of cement. They were tested to evaluate these values of fresh characteristics through slump flow time and diameter, L-box, and segregation tests. The results of the fresh concrete tests showed a decrease in the workability of the concrete in the mixtures containing nano-silica due to the increase in fine materials in the mixture. The effects of nano-silica on the hardened properties of (LWSCC) such as compressive strength, flexural strength, splitting tensile strength, oven-dry density, and scanning electron microscopy (SEM), have improved. The mixtures containing nano-silica were investigated and compared with the reference mixture, where the results of the tests showed a significant improvement in the mechanical properties by (17.35, 16.27, 11.73, and 3.82%) for each of the compressive strength, flexural strength, splitting tensile strength and oven dry density respectively. In the presence of nano-silica, the replacement percentage of 1% recorded the best results in all tests at 90 days of curing.

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Fresh and Hardened Properties of Nano Self-Compacting Concrete with Micro and Nano Silica

Cited by 14 publications

References 5 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

"Exploring the Effects of Self-Curing Techniques on the Characteristics of Self-Compacting Concrete "

The Influence of Nano-Silica on Some Properties of Light Weight Self-Compacting Concrete Aggregate

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