Experimental Study of the Combined Use of Fiber and Nano Silica Particles on the Properties of Lightweight Self Compacting Concrete

Ghanbari, Mohammad; Kohnehpooshi, Omid; Tohidi, Mosleh

doi:10.5829/ije.2020.33.08b.08

Cited by 12 publications

(25 citation statements)

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“…The alumina which is used in nano-aluminium powder in this study was more than 99%. The density and specific surface area of aluminium oxide nanoparticles were 3.89 g/cm 3 and 138 g/cm 2 , respectively. Also, the diameter of its solid particles was about 20 nanometers .…”

Section: Figure 2 Aggregates Grading Diagrammentioning

confidence: 98%

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Durability and Mechanical Properties of Self-compacting Concretes with Combined Use of Aluminium Oxide Nanoparticles and Glass Fiber

Moghaddam

Lotfollahi-Yaghin

Maleki

2021

IJE

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T he presence of fibers in concrete specimens has an effective role on how the specimens were failed. In this study, the effects of aluminium oxide nanoparticles on the workability, mechanical and, durability properties of SCCs containing glass fibers were investigated. Glass fibers contents of 0, 0.5, 1, and 1.5 % by volume of concrete and aluminium oxide nanoparticles contents of 0, 0.5, 1, 1.5, 2, and 3 % by weight of cement were used. T he properties of fresh concrete were evaluated according to EFNARC consideartions. T he mechanical properties were evaluated by compressive strength, splitting tensile strength, and ultrasonic pulse velocity tests. The durability of the specimens was also measured using water absorption tests, water penetration depth and, electrical resistivity. Combined use of 2% aluminium oxide nanoparticles and 1% glass fiber has increased the compressive and tensile strengths of SCCs by 59% and 119.2%, respectively. Aluminium nanoparticles have a very high specific surface area and their reactivity causes them to react rapidly with calcium hydroxide to produce silicate-hydrate gels. T herefore, calcium hydroxide crystals are reduced and the cavities in the cement gel are filled and the compressive strength is increased. T he use of aluminium oxide nanoparticles along with glass fibers reduces the water absorption rate compared to the sample without these materials. This is one of the effective properties of aluminium oxide nanoparticles, which increases the resistance to adverse environmental factors by reducing water absorption.

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Section: Figure 2 Aggregates Grading Diagrammentioning

confidence: 98%

“…Today, the use of nanotechnology in the construction of concrete has good practical potential and has different features [1][2][3][4]. Brittleness of concrete limits its use for parts that are completely or locally under tension.…”

Section: Introductionmentioning

confidence: 99%

Durability and Mechanical Properties of Self-compacting Concretes with Combined Use of Aluminium Oxide Nanoparticles and Glass Fiber

Moghaddam

Lotfollahi-Yaghin

Maleki

2021

IJE

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“…The range of silica nanoparticles and aluminum oxide nanoparticles was considered based on studies about the use of nanoparticles. In most studies, the use of 2.5% nanoparticles was introduced as the optimal value [23][24][25][26][27]. The use of different amounts of nanoparticles can be considered as an important parameter.…”

Section: Laboratory Programmentioning

confidence: 99%

“…The results showed that using 2.5% aluminum oxide nanoparticles as a substitute for cement increased the compressive strength of 90 days by 86% [26]. Ghanbari et al [27] evaluated the effect of nanosilica on the attributes of lightweight concrete containing zeolite and glass fibers. The results showed that the combined use of silica nanoparticles and glass fibers significantly affects self-compacting lightweight concrete containing zeolite and scoria aggregates; Depending on the dose of glass fibers and silica nanoparticles, the tensile strength has increased from about 3 to 56% [27].…”

Section: Introductionmentioning

confidence: 99%

“…Ghanbari et al [27] evaluated the effect of nanosilica on the attributes of lightweight concrete containing zeolite and glass fibers. The results showed that the combined use of silica nanoparticles and glass fibers significantly affects self-compacting lightweight concrete containing zeolite and scoria aggregates; Depending on the dose of glass fibers and silica nanoparticles, the tensile strength has increased from about 3 to 56% [27]. Heidarzad et al [28] evaluated the effects of aluminum oxide nanoparticles on the performance of concrete containing fibers.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Combined Use of Waste Paper Sludge Ash and Nanomaterials on Mechanical Properties and Durability of High Strength Concretes

Delaram

Mohammadi

Adlparvar

2021

IJE

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The paper industry burns or buries a significant amount of waste paper sludge. This issue is not suitable from environmental and economic aspects. In this study, the mechanical and durability properties of high-strength concrete containing waste paper sludge ash (WPSA) were evaluated. The variables were WPSA (0, 5, 10, and 15% by weight of cement), silica nanoparticles (0 and 2.5 by weight of cement), and aluminum oxide nanoparticles (0 and 2.5 by weight of cement). Compressive strength, splitting tensile strength, flexural strength, and ultrasonic pulse velocity tests were conducted to evaluate the mechanical properties. The durability properties were also investigated using water penetration depth, water absorption, and electrical resistivity tests. The microstructure of the specimens was analyzed by preparing electron microscopic images. The combined effect of WPSA and nanoparticles on improving the mechanical and durability properties of high-strength concrete are better than using each of them alone. WPSA and nanoparticles react with calcium hydroxide formed due to cement's hydration, and silica produces hydrated calcium, which is the hard material that makes concrete strength. Consumption of calcium hydroxide and production of more hydrated calcium silicate in the presence of nanoparticles and WPSA are among the reasons for water absorption reduction, increased electrical resistance, and water penetration depth reduction in concrete specimens. By replacing part of the cement with WPSA, silica nanoparticles, and aluminum oxide nanoparticles, the transition zone between the aggregates strengthens, and the tensile and flexural strengths increased.

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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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Experimental Study of the Combined Use of Fiber and Nano Silica Particles on the Properties of Lightweight Self Compacting Concrete

Cited by 12 publications

References 0 publications

Durability and Mechanical Properties of Self-compacting Concretes with Combined Use of Aluminium Oxide Nanoparticles and Glass Fiber

Durability and Mechanical Properties of Self-compacting Concretes with Combined Use of Aluminium Oxide Nanoparticles and Glass Fiber

Evaluation of the Combined Use of Waste Paper Sludge Ash and Nanomaterials on Mechanical Properties and Durability of High Strength Concretes

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

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