The improvement of mechanical, physical and durability characteristics of volcanic tuff based geopolymer concrete by using nano silica, micro silica and Styrene-Butadiene Latex additives at different ratios

Ekinci, Enes; Türkmen, İbrahim; Karakoç, Mehmet Burhan; Karakoç, Mehmet Burhan

doi:10.1016/j.conbuildmat.2018.12.204

Cited by 78 publications

(24 citation statements)

References 28 publications

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“…Slavik et al 24 found that the compressive strength losses of geopolymer samples exposed to 50 F–T cycles did not exceed 20%. Ekinci et al 16 stated that the decreases in compressive strengths of geopolymer concrete exposed to 300 F–T cycles were between 13 and 20% in samples using Na 2 SiO 3 + NaOH and between 20 and 27% in samples using only NaOH. Temuujin et al 25 reported that the strength loss of Baganuur ash‐ and Shivee‐Ovoo ash‐based geopolymer samples exposed to 40 F–T cycles were 11 and 36%, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Ekinci et al 16 stated that the UPV values of geopolymer concrete samples activated with Na 2 SiO 3 + NaOH decreased by approximately 8–22% after 300 F–T cycles. Topçu and Canbaz 27 reported that as the F–T cycles increased, cracks in mortars increased, and their UPV values decreased due to these cracks.…”

Section: Resultsmentioning

confidence: 99%

“…In past years, the mechanical properties and durability of alkali‐activated geopolymers have been widely studied 7–20 . Shahrajabian and Behfarnia 12 produced alkaline activated slag‐based concretes containing nanoparticles, and these concretes were subjected to 300 F–T cycles.…”

Section: Introductionmentioning

confidence: 99%

“…Fu et al 1 investigated the properties of NaOH and Na 2 SiO 3 activated slag concretes subjected to 300 F–T cycles. Ekinci et al 16 produced nano‐silica, micro silica, and styrene‐butadiene latex added volcanic tuff‐based geopolymer concrete, these samples exposed to 300 F–T cycles. Nazarpour and Jamali 17 investigated mechanical and freezing cycles properties of geopolymer concrete with recycled aggregate.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the properties of two different slag‐based geopolymer concretes exposed to freeze–thaw cycles

Özdal

Karakoç

Özcan

2019

Structural Concrete

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Ferrochrome slag (FS) and ground granulated blast furnace slag (GGBFS) were used as resource material in geopolymer concrete mixtures. A mixture of 10 M sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) was used as the activator. After the two different slag‐based geopolymer concrete (SGC) mixtures were prepared and molded. They were kept at 80°C for 24 hr, and then the SGC samples were cured in 23 ± 1°C water for 27 days. Samples that completed the curing times were exposed to the 300 freeze–thaw (F–T) cycles. The compressive strength, ultrasonic pulse velocity, relative dynamic elasticity modulus values, weight changes, and appearances of the SGC samples were examined at the end of every 50 F–T cycles. Scanning electron microscopy analysis was performed to examine the microstructure changes of the samples after 300 F–T cycles. As the GGBFS proportion in the SGC mix increased, the mechanical properties of the samples against the F–T effect increased. Samples containing 100% FS and 75% FS fell apart at the end of 150 and 200 F–T cycles, respectively. The deterioration of the geopolymer gel structures of the samples exposed to F–T was decreased with increasing GGBFS ratio in the mix.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of the properties of two different slag‐based geopolymer concretes exposed to freeze–thaw cycles

Özdal

Karakoç

Özcan

2019

Structural Concrete

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“…Recently, nanoparticles have received significant attention as an additive for geopolymer concrete. Nano-silica, nano-alumina and nano-clay are the most widely investigated nanomaterials to improve the mechanical properties of geopolymers [ 14 , 57 , 58 , 59 , 60 , 61 ]. Assaedi et al investigated the influence of the mixing method (dry and wet mix) and the amount of nano-silica on the flexural and compressive strength.…”

Section: Natural Fibersmentioning

confidence: 99%

Natural Fiber-Stabilized Geopolymer Foams—A Review

et al. 2020

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The development of sustainable, environmentally friendly insulation materials with a reduced carbon footprint is attracting increased interest. One alternative to conventional insulation materials are foamed geopolymers. Similar to foamed concrete, the mechanical properties of geopolymer foams can also be improved by using fibers for reinforcement. This paper presents an overview of the latest research findings in the field of fiber-reinforced geopolymer foam concrete with special focus on natural fibers reinforcement. Furthermore, some basic and background information of natural fibers and geopolymer foams are reported. In most of the research, foams are produced either through chemical foaming with hydrogen peroxide or aluminum powder, or through mechanical foaming which includes a foaming agent. However, previous reviews have not sufficiently addresses the fabrication of geopolymer foams by syntactic foams. Finally, recent efforts to reduce the fiber degradation in geopolymer concrete are discussed along with challenges for natural fiber reinforced-geopolymer foam concrete.

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Diamine functionalized volcanic tuff: a promising CO₂ adsorbent

Kaya

2023

J of Chemical Tech & Biotech

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BackgroundGreenhouse gases, especially CO2, are primary factors for global warming and CO2 emissions continue to increase annually. Many legislations and agreements have been made to decrease, or at least stabilize, CO2 concentrations in the atmosphere. Moreover, promising CO2 capture technologies, such as adsorption using solid sorbents, have been developed and shown high CO2 adsorption capacity.ResultsVolcanic tuff, a natural pozzolanic material, was evaluated as a solid CO2 adsorbent in this study. Following pre‐treatment of the volcanic tuff with HCl solution, CO2 adsorption experiments were conducted by thermogravimetric analysis (TGA). Diamine functionalization of the volcanic tuff was carried out using amine based compounds with different chain lengths, including ethylenediamine, 1,4‐diaminobutane and 1,6‐diaminohexane. The CO2 adsorption capacity of the volcanic tuff was significantly enhanced in the presence of 1,6‐diaminohexane. Maximum CO2 adsorption capacity was determined to be 42.94 mg g−1 with 70 wt% 1,6‐diaminohexane loading. The CO2 adsorption capacity of the 1,6‐diaminohexane functionalized volcanic tuff decreased with increasing temperature, which was an indication of exothermic adsorption. Adsorption–desorption cycles revealed that the 1,6‐diaminohexane functionalized volcanic tuff was a reusable CO2 adsorbent with high stability.ConclusionThe results show that the low cost, eco‐friendly, and highly stable diamine functionalized volcanic tuff can be considered a promising adsorbent for CO2 capture. © 2023 Society of Chemical Industry (SCI).

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The improvement of mechanical, physical and durability characteristics of volcanic tuff based geopolymer concrete by using nano silica, micro silica and Styrene-Butadiene Latex additives at different ratios

Cited by 78 publications

References 28 publications

Investigation of the properties of two different slag‐based geopolymer concretes exposed to freeze–thaw cycles

Investigation of the properties of two different slag‐based geopolymer concretes exposed to freeze–thaw cycles

Natural Fiber-Stabilized Geopolymer Foams—A Review

Diamine functionalized volcanic tuff: a promising CO₂ adsorbent

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The improvement of mechanical, physical and durability characteristics of volcanic tuff based geopolymer concrete by using nano silica, micro silica and Styrene-Butadiene Latex additives at different ratios

Cited by 78 publications

References 28 publications

Investigation of the properties of two different slag‐based geopolymer concretes exposed to freeze–thaw cycles

Investigation of the properties of two different slag‐based geopolymer concretes exposed to freeze–thaw cycles

Natural Fiber-Stabilized Geopolymer Foams—A Review

Diamine functionalized volcanic tuff: a promising CO2 adsorbent

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Product

Resources

About

Diamine functionalized volcanic tuff: a promising CO₂ adsorbent