Evaluation of Nano-Silica Modified ECC Based on Ultrasonic Pulse Velocity and Rebound Hammer

Mohammed, Bashar S.; Syed, Zubair Imam; Khed, Veerendrakumar C.; Qasim, M.

doi:10.2174/1874149501711010638

Cited by 15 publications

(1 citation statement)

References 22 publications

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“…Conversely, the utilisation of nano-silica, in the absence of coarse aggregates, has the potential to elevate the modulus of elasticity and improve the overall performance of the material. The selection and ratios of these constituents in a concrete mixture will vary based on the desired characteristics of the composite and its intended use 11 . By conducting freeze-soak-sour cycles of a different concrete mix containing nano hydrophobic silane, silica improves durability Concrete workability, strength and durability can be improved using nano-silica in the concrete mix 12 .…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the effect of nano-silica on reinforced concrete Beam-column connection subjected to Cyclic Loading

Shyamala,

Hemalatha,

Devarajan

et al. 2023

Sci Rep

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Beam-column joints are crucial load transmission zones because they face concentrated forces from both the beams and the columns. High shear and axial stresses caused by these concentrated forces in the area of the joint may result in decreased joint strength. This article proposes a new beam-to-column connection developed for precast concrete-resisting frames. Concrete mixtures are enhanced mechanically by adding nano silica as it increases compressive strength, flexural strength, and abrasion resistance. Within the concrete, it creates a solid, gel-like matrix that fills voids and strengthens the whole construction. In this study, three reinforced concrete beam-column joint specimens were cast with fly ash, the other three with nano-silica and fly ash, and one sample with nano-silica and a control mix without admixtures was cast. Specimen cast using fly ash and nano-silica is subjected to cyclic loading after 28 days of curing. A load capacity of 100 kN was imposed on the column during testing. It was observed that a gradual increase in fly ash decreased the compressive and flexural strength of the beam-column joints. This decrease in strength was addressed by adding 2.5% nano-silica. Nano silica acts as a nucleus to bond tightly with cement particles during hydration. The results showed that the flexural strength equivalent to that of a controlled specimen can be achieved by adding nano-silica at 2.5% and fly ash at 60%. The highest loading of 38.1 kN can be applied to the specimen with nano-silica without fly ash. Although a higher axial compression ratio can improve the bearing capacity and initial stiffness, it can also reduce deformation capacity and flexibility.

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Section: Introductionmentioning

confidence: 99%

Experimental investigation on the effect of nano-silica on reinforced concrete Beam-column connection subjected to Cyclic Loading

Shyamala,

Hemalatha,

Devarajan

et al. 2023

Sci Rep

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Theoretical Research and Performance of Engineered Cementitious Composite

Srikakulam

Khed

2020

Springer Proceedings in Materials

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Nano-enhanced concrete: unveiling the impact of nano-silica on strength, durability, and cost efficiency

Labaran,

Atmaca,

Tan

et al. 2024

Discov Civ Eng

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This research explores the advanced application of nano-silica (nS) in concrete, emphasizing its significant role in improving the mechanical strength and longevity of concrete structures. Unlike prior studies on nS in concrete, this work goes beyond evaluating typical performance metrics such as compressive strength, water absorption, air permeability, and drying shrinkage, by also examining the effect on production costs. The study involved detailed experimental procedures, where concrete mixtures were prepared with varying water-to-binder (w/b) ratios of 0.33, 0.45, and 0.55, and nS contents of 0, 1, 3, and 5 percent by binder weight. The results indicate that a 3% nS admixture significantly boosts compressive strength and reduces both water and gas permeability, although it also leads to an increase in drying shrinkage. Furthermore, the cost analysis shows that even a small 1% addition of nS can raise production costs, underscoring the importance of balancing cost-effectiveness with performance improvements when considering nS for concrete applications.

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Evaluation of Nano-Silica Modified ECC Based on Ultrasonic Pulse Velocity and Rebound Hammer

Cited by 15 publications

References 22 publications

Experimental investigation on the effect of nano-silica on reinforced concrete Beam-column connection subjected to Cyclic Loading

Experimental investigation on the effect of nano-silica on reinforced concrete Beam-column connection subjected to Cyclic Loading

Theoretical Research and Performance of Engineered Cementitious Composite

Nano-enhanced concrete: unveiling the impact of nano-silica on strength, durability, and cost efficiency

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