Serdar Aydin - Academia.edu (original) (raw)
Papers by Serdar Aydin
Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi, 2019
Cement and Concrete Composites, 2010
Powder Technology, 2010
The effect of fineness of fly ash on mechanical properties and alkalisilica reaction resistance ... more The effect of fineness of fly ash on mechanical properties and alkalisilica reaction resistance of cement mortar mixtures incorporating fly ash has been investigated within the scope of this study. Blaine fineness of fly ash has been increased to 907 m 2 /kg from its original 290 m ...
The mechanical properties of 4 timber species (poplar, fir, pine and hornbeam) commonly used in T... more The mechanical properties of 4 timber species (poplar, fir, pine and hornbeam) commonly used in Turkey were investigated. The compressive strength, flexural strength and toughness were determined both per-pendicular and parallel to the grain. The modulus of elasticity of timber specimens was also determined parallel to the grain for the compressive test and perpendicular to the grain for the flexural test. It was found that loading direction affects all mechanical properties remarkably. Among the timbers tested, maximum and minimum mechanical performances were obtained with the 2 hardwoods, i.e. horn-beam and poplar, respectively. The mechanical performance of the softwoods, i.e. fir and pine, was between that of the 2 hardwoods. Hornbeam showed the minimum anisotropy. Except for hornbeam, the timbers showed very low compressive strength when loaded perpendicular to the grain and very low flexural strength when loaded parallel to the grain.
Construction and Building Materials
Cement and Concrete Composites
Materials
Alkali-activated slag is considered as a sustainable construction material due to its environment... more Alkali-activated slag is considered as a sustainable construction material due to its environmentally friendly nature. To further promote the sustainable nature of alkali-activated slag, a sodium sulfate activator is suggested to be used since it can be obtained naturally and generates lower greenhouse gas emissions. However, the mixtures activated by sodium sulfate exhibit low early strength and very long setting times. This study investigates the effects of calcium hydroxide (Ca(OH)2) addition on some engineering properties such as rheology, setting time, mechanical properties, porosity, and microstructure of sodium sulfate activated ground granulated blast furnace slag (GGBFS). Furthermore, the changes of chemical groups in reaction products and phase identification have been evaluated by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction. Test results showed that Ca(OH)2 addition can substantially increase the reaction rate and the compressive strength at early...
Deu Muhendislik Fakultesi Fen ve Muhendislik, 2016
Deu Muhendislik Fakultesi Fen ve Muhendislik, 2016
Materials and Design
The effects of steam and autoclave curing on the mechanical properties and microstructure of alka... more The effects of steam and autoclave curing on the mechanical properties and microstructure of alkali activated slag mortars (AAS) were investigated within the scope of this study. Slag was activated by the mixtures of sodium hydroxide and sodium silicate, in different Na2O and Ms (SiO2/Na2O) ratios. Test results showed that high strength mortars can be produced with very low alkali content under autoclave curing as a result of better pore size distribution, higher rate of hydrated parts of slag grains which leads to a better microstructure formation. A compressive strength value of 70 MPa has been reached by incorporation of 2% Na2O under autoclave curing. Nevertheless, steam curing presents similar mechanical performance with autoclave curing for AAS mortar activated by the solutions with high Ms values. Both curing methods were significantly effective in terms of reducing drying shrinkage of AAS mortars.
Periodica Polytechnica Civil Engineering, 2013
Journal of Materials in Civil Engineering, 2010
Improvement on SIFCON Performance by Fiber Orientation and High-Volume Mineral Admixtures. [Journ... more Improvement on SIFCON Performance by Fiber Orientation and High-Volume Mineral Admixtures. [Journal of Materials in Civil Engineering 22, 1093 (2010)]. Halit Yazıcı, Serdar Aydın, Hüseyin Yiğiter, Mert Y. Yardımcı, Giray Alptuna. Abstract. ...
Fire Safety Journal, 2008
The effects of high temperatures up to 900 °C on the mechanical properties and the microstructure... more The effects of high temperatures up to 900 °C on the mechanical properties and the microstructure of cement-based pumice mortars incorporating different amounts of ground granulated blast furnace slag (GGBFS) were investigated in this study. The residual compressive and ...
Construction and Building Materials, 2013
Construction and Building Materials, 2009
The effects of fineness of portland cement procured from six different Turkish cement plants, on ... more The effects of fineness of portland cement procured from six different Turkish cement plants, on superplasticizer/cement interaction were investigated. CEM I 42.5 type portland cements (PC) were ground into different finenesses ranging from 280 to 550 m 2 /kg Blaine values. ...
Construction and Building Materials, 2008
The effects of high temperatures up to 900 °C on normal strength, water cured and autoclave cured... more The effects of high temperatures up to 900 °C on normal strength, water cured and autoclave cured high strength mortars were investigated within the scope of this study. Mechanical properties such as, compressive strength, flexural strength, modulus of elasticity, and weight loss of ...
Composites Part B: Engineering, 2013
ABSTRACT The effects of length and volume fraction of steel fibers on the mechanical properties a... more ABSTRACT The effects of length and volume fraction of steel fibers on the mechanical properties and drying shrinkage behavior of steel fiber reinforced alkali-activated slag/silica fume (AASS) mortars were investigated within the scope of this research. Steel fibers with two different lengths of 6 mm and 13 mm, and four different volume fractions of 0.5%, 1.0%, 1.5% and 2.0% were used in the AASS mixtures. Also, a Portland cement (PC) based 1.5% steel fiber (13 mm length) reinforced mortar was prepared for comparison. Test results showed that mechanical performance of AASS mortars were significantly better than PC based control mortar. This superior performance of AASS mortar may be attributed to the higher bond properties between the fibers and AASS matrix compared to PC matrix. The mechanical performance of AASS improved dramatically parallel to the increment of fiber length from 6 mm to 13 mm. Also, the drying shrinkage of AASS mortars decreased with the increasing fiber dosage.
Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi, 2019
Cement and Concrete Composites, 2010
Powder Technology, 2010
The effect of fineness of fly ash on mechanical properties and alkalisilica reaction resistance ... more The effect of fineness of fly ash on mechanical properties and alkalisilica reaction resistance of cement mortar mixtures incorporating fly ash has been investigated within the scope of this study. Blaine fineness of fly ash has been increased to 907 m 2 /kg from its original 290 m ...
The mechanical properties of 4 timber species (poplar, fir, pine and hornbeam) commonly used in T... more The mechanical properties of 4 timber species (poplar, fir, pine and hornbeam) commonly used in Turkey were investigated. The compressive strength, flexural strength and toughness were determined both per-pendicular and parallel to the grain. The modulus of elasticity of timber specimens was also determined parallel to the grain for the compressive test and perpendicular to the grain for the flexural test. It was found that loading direction affects all mechanical properties remarkably. Among the timbers tested, maximum and minimum mechanical performances were obtained with the 2 hardwoods, i.e. horn-beam and poplar, respectively. The mechanical performance of the softwoods, i.e. fir and pine, was between that of the 2 hardwoods. Hornbeam showed the minimum anisotropy. Except for hornbeam, the timbers showed very low compressive strength when loaded perpendicular to the grain and very low flexural strength when loaded parallel to the grain.
Construction and Building Materials
Cement and Concrete Composites
Materials
Alkali-activated slag is considered as a sustainable construction material due to its environment... more Alkali-activated slag is considered as a sustainable construction material due to its environmentally friendly nature. To further promote the sustainable nature of alkali-activated slag, a sodium sulfate activator is suggested to be used since it can be obtained naturally and generates lower greenhouse gas emissions. However, the mixtures activated by sodium sulfate exhibit low early strength and very long setting times. This study investigates the effects of calcium hydroxide (Ca(OH)2) addition on some engineering properties such as rheology, setting time, mechanical properties, porosity, and microstructure of sodium sulfate activated ground granulated blast furnace slag (GGBFS). Furthermore, the changes of chemical groups in reaction products and phase identification have been evaluated by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction. Test results showed that Ca(OH)2 addition can substantially increase the reaction rate and the compressive strength at early...
Deu Muhendislik Fakultesi Fen ve Muhendislik, 2016
Deu Muhendislik Fakultesi Fen ve Muhendislik, 2016
Materials and Design
The effects of steam and autoclave curing on the mechanical properties and microstructure of alka... more The effects of steam and autoclave curing on the mechanical properties and microstructure of alkali activated slag mortars (AAS) were investigated within the scope of this study. Slag was activated by the mixtures of sodium hydroxide and sodium silicate, in different Na2O and Ms (SiO2/Na2O) ratios. Test results showed that high strength mortars can be produced with very low alkali content under autoclave curing as a result of better pore size distribution, higher rate of hydrated parts of slag grains which leads to a better microstructure formation. A compressive strength value of 70 MPa has been reached by incorporation of 2% Na2O under autoclave curing. Nevertheless, steam curing presents similar mechanical performance with autoclave curing for AAS mortar activated by the solutions with high Ms values. Both curing methods were significantly effective in terms of reducing drying shrinkage of AAS mortars.
Periodica Polytechnica Civil Engineering, 2013
Journal of Materials in Civil Engineering, 2010
Improvement on SIFCON Performance by Fiber Orientation and High-Volume Mineral Admixtures. [Journ... more Improvement on SIFCON Performance by Fiber Orientation and High-Volume Mineral Admixtures. [Journal of Materials in Civil Engineering 22, 1093 (2010)]. Halit Yazıcı, Serdar Aydın, Hüseyin Yiğiter, Mert Y. Yardımcı, Giray Alptuna. Abstract. ...
Fire Safety Journal, 2008
The effects of high temperatures up to 900 °C on the mechanical properties and the microstructure... more The effects of high temperatures up to 900 °C on the mechanical properties and the microstructure of cement-based pumice mortars incorporating different amounts of ground granulated blast furnace slag (GGBFS) were investigated in this study. The residual compressive and ...
Construction and Building Materials, 2013
Construction and Building Materials, 2009
The effects of fineness of portland cement procured from six different Turkish cement plants, on ... more The effects of fineness of portland cement procured from six different Turkish cement plants, on superplasticizer/cement interaction were investigated. CEM I 42.5 type portland cements (PC) were ground into different finenesses ranging from 280 to 550 m 2 /kg Blaine values. ...
Construction and Building Materials, 2008
The effects of high temperatures up to 900 °C on normal strength, water cured and autoclave cured... more The effects of high temperatures up to 900 °C on normal strength, water cured and autoclave cured high strength mortars were investigated within the scope of this study. Mechanical properties such as, compressive strength, flexural strength, modulus of elasticity, and weight loss of ...
Composites Part B: Engineering, 2013
ABSTRACT The effects of length and volume fraction of steel fibers on the mechanical properties a... more ABSTRACT The effects of length and volume fraction of steel fibers on the mechanical properties and drying shrinkage behavior of steel fiber reinforced alkali-activated slag/silica fume (AASS) mortars were investigated within the scope of this research. Steel fibers with two different lengths of 6 mm and 13 mm, and four different volume fractions of 0.5%, 1.0%, 1.5% and 2.0% were used in the AASS mixtures. Also, a Portland cement (PC) based 1.5% steel fiber (13 mm length) reinforced mortar was prepared for comparison. Test results showed that mechanical performance of AASS mortars were significantly better than PC based control mortar. This superior performance of AASS mortar may be attributed to the higher bond properties between the fibers and AASS matrix compared to PC matrix. The mechanical performance of AASS improved dramatically parallel to the increment of fiber length from 6 mm to 13 mm. Also, the drying shrinkage of AASS mortars decreased with the increasing fiber dosage.