Developing geopolymer concrete by using cold-bonded fly ash aggregate, nano-silica, and steel fiber

Their, Jumah Musdif; Özakça, Mustafa

doi:10.1016/j.conbuildmat.2018.05.274

Cited by 91 publications

(26 citation statements)

References 44 publications

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“…Geopolymer concrete. Geopolymer concrete with 1% silica fume and 2% nano silica improved the durability of the manufactured concrete when compared with the control specimen [14]. There is a reduction in porosity due to the presence of NS thus it improved the durability of the concrete.…”

Section: Durability Properties Of Concretes With Nano Silicamentioning

confidence: 88%

“…Currently nano silica is used in geopolymer concrete also. The combined effect of 1% SF with 2% NS possessed good mechanical properties in geopolymer concrete [14]. The combined effect of utilizing nano silica and silica fume each at 1.5% improved the microstructure of geopolymer concrete and it also possessed good compressive strength [15].…”

Section: Recycled Concretementioning

confidence: 94%

“…The combined effect of utilizing nano silica and silica fume each at 1.5% improved the microstructure of geopolymer concrete and it also possessed good compressive strength [15]. This could be due to the high rate of alkali activation reaction that takes place in geopolymer concrete [14,15,17,28]. Figure 2 shows the comparative chart of compressive strength of geopolymer concrete in which nano silica is incorporated at various percentages by various researchers.…”

Section: Recycled Concretementioning

confidence: 99%

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Effect of nano silica on the properties of concrete and mortar – A state of art

Priya

Vanitha

2021

IRASE

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Construction industry is one of the biggest sectors globally and a wide variety of materials are used to carry out various works. Particularly, cement is a material that is used in the construction of various structures and it is also the major source of emission of CO2 gas into the atmosphere which results in global warming. Many researchers have identified various replacement materials for cement as a partial substitution and carried out experiments successfully. Nano silica is widely utilized as a partial replacement for cement and a lot of research is carried out. This paper reviews the past studies in which nano silica is utilized in various building materials such as cement mortars, normal concrete and special concretes. The fresh concrete properties, strength and durability of the material are the parameters reviewed and it is apparent that by incorporating nano silica in cement it absorbs more water, which makes the mix less workable and it imparts additional strength to the concrete and also provides better durability when compared with the control specimen. Hence it has been revealed that nano silica will be a good replacement for cement as it is pozzolanic in nature and also possessing good microstructure.

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Section: Durability Properties Of Concretes With Nano Silicamentioning

confidence: 88%

Section: Recycled Concretementioning

confidence: 94%

Section: Recycled Concretementioning

confidence: 99%

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Effect of nano silica on the properties of concrete and mortar – A state of art

Priya

Vanitha

2021

IRASE

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“…Adding 1% nano-SiO 2 and 3% nano-CaCO 3 concentration could effectively improve the compressive strength and flexural strength of RAC (Li et al, 2015). Moreover, 2% nanosilica and 1% steel fiber could also significantly enhance the compressive strength and mechanical properties of the geopolymer concrete (Their and Özakça, 2018).…”

Section: Introductionmentioning

confidence: 94%

Effects of Different Strain Rates on the Impact Properties of Recycled Aggregate Concrete Modified With Nanosilica Solution and Polyvinyl Alcohol Fiber

et al. 2021

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The recycled aggregate (RA) was modified by 2% nanosilica solution, and the split Hopkinson pressure bar (SHPB) test device was used to study the dynamic impact properties of the modified recycled aggregate concrete (RAC) mixed with polyvinyl alcohol (PVA) fibers. The RA replacement percentage, the amount of PVA fiber, and the strain rate were variables. The failure pattern, the stress–strain curve of the nanosilica solution, and PVA fiber-modified RAC were shown under different strain rate conditions. Dynamic peak stress, peak strain, and dynamic increase factor (DIF) of the specimens are discussed. The results showed that the stress and dynamic peak strain value of the specimen increased with the increase of the strain rate; moreover, with the increase of the RA replacement percentage and the PVA fiber content, the dynamic peak stress of the specimen decreases, while the dynamic peak strain and the DIF value increase. The incorporation of nanosilica-modified RA is beneficial to the improvement of the impact performance of RAC, and the incorporation of an appropriate amount of the PVA fiber effectively improves the deformability of RAC.

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“…There are many researches about mechanical properties of nano-silica concrete [25][26][27] and a lot of researches about concrete filled steel tube stub columns after being exposed to freezing and thawing [17,28], but there are very few studies on the performance of nano-silica concrete filled stainless steel tube (CFSST) columns subjected to freeze-thaw cycles. So it is important to conduct a test on the behavior of CFSST columns subjected to freezethaw cycles.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of circular nano-silica concrete filled stainless steel tube stub columns after being exposed to freezing and thawing

Lin

Chen

Liu

2019

Nanotechnology Reviews

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Experimental research on circular nano-silica concrete filled stainless steel tube (C-CFSST) stub columns after being exposed to freezing and thawing is carried out in this paper. All of forty specimens were tested in this paper, including nine C-CFSST specimens at normal temperature, 28 short columns of C-CFSST for freeze-thaw treatment and three circular hollow stainless steel stub columns. The failure mode, load-displacement curves, load-strain curves and load-bearing capacity were obtained and analyzed in this paper. The main parameters explored in the test include the number of freeze-thaw cycles (N=0, N=50, N=75, and N=100), wall thickness (T=1.0mm, T=1.2mm, T=1.5mm) andnano-silica concrete strength (fc=20MPa, fc=30MPa, fc=40MPa). The result shows that C-CFSST short columns at normal temperature and subjected to freezing and thawing follow similar failure mode. The effect of freeze-thaw cycles (N) of 50 on bearing capacity of C-CFSST column was maximal, and then the influence of N on the bearing capacity of specimens was small when N reached to 75, finally the effect of N on bearing capacity of C-CFSST column was large when N reached to 100. The bearing capacity of C-CFSST columns increases with increasing wall thickness. In addition, the loss percentage of bearing capacity of specimens (fc=40MPa) for freeze-thaw treatment is maximal, and the loss percentage of bearing capacity of specimens (fc=30MPa) for freeze-thaw treatment is minimal. According to the test results, this paper proposed a formula to calculate the bearing capacity of C-CFSST short columns for freeze-thaw treatment.

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Developing geopolymer concrete by using cold-bonded fly ash aggregate, nano-silica, and steel fiber

Cited by 91 publications

References 44 publications

Effect of nano silica on the properties of concrete and mortar – A state of art

Effect of nano silica on the properties of concrete and mortar – A state of art

Effects of Different Strain Rates on the Impact Properties of Recycled Aggregate Concrete Modified With Nanosilica Solution and Polyvinyl Alcohol Fiber

Mechanical properties of circular nano-silica concrete filled stainless steel tube stub columns after being exposed to freezing and thawing

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