The effect of fly ash to self-compactability of pumice aggregate lightweight concrete

Kurt, Murat; Aydın, Abdulkadir Cüneyt; Gül, Muhammed Said; Gül, Rüstem; Kotan, Türkay

doi:10.1007/s12046-015-0337-y

Cited by 23 publications

(13 citation statements)

References 17 publications

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“…In SEM studies, adding activated carbon in fly ash mixtures resulted in filling gaps with calcium silicate hydrate (C-S-H) and ettringite which are hydration products. Therefore, adding activated carbon to fly ash affected the microstructure of concrete positively and mixtures with higher strength were obtained [23]. Similarly to this study, when the SEM images were examined, C-S-H, C-H and ettringite existed in the samples.…”

Section: Sem and Xrdsupporting

confidence: 64%

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Analysis of Fly Ash Concrete with Scanning Electron Microscopy and X-Ray Diffraction

Uzbaş¹,

Aydın²

2019

Adv. Sci. Technol. Res. J.

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In this study, the effects of using different ratios of fly ash on hydration products as well as the mechanical and microstructural properties of hardened concrete were investigated. Portland cement was replaced with 5%, 10%, 15% and 20% fly ash (FA) by weight. The microstructural properties of the obtained samples were investigated by means of X-ray diffraction (XRD) and Scanning electron microscopy (SEM). Fly ash has negative effect on 7 days concrete strength; however, it was seen that fly ash increases the compressive strength of 28 and 90 days concrete. The XRD analysis showed that the ratio of calcium hydroxide (CH), which is produced by hydration, decreases depending on the concrete age and the amount of fly ash. The SEM analysis showed that the usage of fly ash decreases gaps and increases C-S-H which is also a hydration production. When Portland cement was replaced with 10% fly ash by weight, compressive strength has increased and microstructure of concrete has improved. The reason for this is filling of gaps by fly ash and the decrease in the amount of Ca(OH) 2 due to the reaction between fly ash and Ca(OH) 2 . Within this scope, the development in microstructure of fly ash concrete was evaluated in 90 days duration and a change of the development with compressive strength was investigated.

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Section: Sem and Xrdsupporting

confidence: 64%

“…This decreases the shear stress of concrete without increasing viscosity too much. Therefore, the loss of workability generally decreases with increasing ash and water content [23].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Fly Ash Concrete with Scanning Electron Microscopy and X-Ray Diffraction

Uzbaş¹,

Aydın²

2019

Adv. Sci. Technol. Res. J.

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“…[14]. According to TS EN 196-8, total heat of hydration of BAB cement should not be over the value of 70 cal/g at the end of the 28 th day or when determined by isothermal conduction calorimeter method at the end of the 28 th day [9,[18][19][20][21].…”

Section: Methodsmentioning

confidence: 99%

Hydration properties of boron modified active belite cement concrete

Aydın¹,

Kan²,

Fayetorbay³

et al. 2018

Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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“…The V-funnel test is to some degree related to the plastic viscosity. All the above-mentioned tests are defined in detail elsewhere [16,[19][20][21][22][23][24][25][26][27][28][29].…”

Section: Methodsmentioning

confidence: 99%

The Effect of Cement Type and the Atmospheric Steam Curing Cycles on the Properties of Variable Types of Self-Compacting Lightweight Concrete

Aydın¹

2018

JCCEE

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With the steam curing technology, effective fast curing technique in prefabrication technology, the effect of atmospheric steam curing on the mechanical properties of variable types of self-compacting lightweight concretes and the combination of the properties of semi-lightweight self-compacting concrete are important engineering approaches, focused in this study, in terms of workable and lightweight concrete production that is easy to apply. The cement type (CEM I 42.5 and CEM II 32.5) and three types of aggregates (normal, pumice and raw perlite) were the parameters of the study, including three types of steam curing cycle. The manufactured concrete samples were not only tested for compressive strength and bending, but also for splitting tensile strength. The fresh and hardened unit weight, dimension check and ultrasonic pulse velocity observations were also obtained for all 108 concrete samples. The three steam curing cycles were about 36.5 hours for 65°C, 70°C and 75°C. These steam-curing cycles were designed according to predesign tests and literature. As a result, the cement type and aggregate effect on the steam curing regimes were obtained. The decrease in the compressive strength of lightweight pumice concretes by the curing temperature rise and the negative effects of CEM II 32.5 on the strength values were the other striking results of the tests.

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The effect of fly ash to self-compactability of pumice aggregate lightweight concrete

Cited by 23 publications

References 17 publications

Analysis of Fly Ash Concrete with Scanning Electron Microscopy and X-Ray Diffraction

Analysis of Fly Ash Concrete with Scanning Electron Microscopy and X-Ray Diffraction

Hydration properties of boron modified active belite cement concrete

The Effect of Cement Type and the Atmospheric Steam Curing Cycles on the Properties of Variable Types of Self-Compacting Lightweight Concrete

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