İlker Ustabaş
Recep Tayyip Erdoğan University
Silica fumeMortarNeutronComposite materialAbsorption of waterPozzolanic activityAttenuationMetallurgyMaterials scienceElectromagnetic shieldingRhyoliteCompressive strengthGround granulated blast-furnace slagTrachyteEnvironmental scienceCementSorptionEffective atomic numberPozzolanFly ash
11Publications
5H-index
168Citations
Publications 17
Newest
#1İlker UstabaşH-Index: 5
#2Sakir Erdogdu (Karadeniz Technical University)H-Index: 2
Last. Erol YilmazH-Index: 33
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Made up of an engineered mix of ordinary Portland cement (OPC) with artificial pozzolans such as trass, fly ash, and slag, the blended cements have been intensely employed within cementitious materials. The main reasons behind this intensive use can be clarified by enhanced workability/strength, the high resistance to chloride/sulfate, reduced permeability/alkali-silica reaction, and a drop in the heat generated by cement’s hydration. The use of cementitious blends within concrete not only offer...
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#3Sakir Erdogdu (Karadeniz Technical University)H-Index: 2
Last. İlker UstabaşH-Index: 5
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The alkali-silica reaction (ASR) is a highly complex chemical reaction which causes damage to concrete and thus adversely affects the durability and service life. Significant damage can occur in concrete structures due to cracking because of the chemical reactions taking place. Various mineral and chemical additives have been used so far to mitigate ASR and/or to reduce its adverse effects. In this study, ground trachyte and rhyolite provided from Rize-Cagrankaya region, Turkey, were used to inv...
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#1İlker Ustabaş (Recep Tayyip Erdoğan University)H-Index: 5
#2Fatih Deşik (State Hydraulic Works)H-Index: 2
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#1Vahiddin Alperen Baki (University of Bath)H-Index: 1
#2Safa Nayır (Karadeniz Technical University)H-Index: 3
Last. İlker Ustabaş (Recep Tayyip Erdoğan University)H-Index: 5
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Natural pozzolanas should be evaluated in terms of sustainability as well as their contribution to concrete durability. Therefore, the use of such materials in the production of cement as well as concrete industry has been gaining importance recently. In this study, the pozzolanic activities of ground trachyte and rhyolite, known as volcanic tuffs, were investigated in accordance with TS 25 standard. Pozzolanic properties of such materials, along with their pozzolanic activity indices, are inves...
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#1İlker UstabaşH-Index: 5
Last. Fatih DeşikH-Index: 2
view all 4 authors...
Karbon fiber takviyeli kumaslar (CFRP) gibi cesitli polimer kompozitlerin deprem dayanimi yetersiz yapilarin guclendirilmesinde kullanimi yayginlasmaktadir. Bu yeni guclendirme yontemi sargi etkisiyle betonarme elemanlarin basinc dayanimini artirirken sunek davranisa da onemli olcude katki saglamaktadir. Bu calisma kapsaminda; mevcut bir yapidan karot numuneler alinmistir. Bu karot numuneler CFRP ile sarilarak guclendirilmis ve basinc dayanimlari olculmustur. Ayni zamanda karot numuneler ANSYS y...
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#1İlker UstabaşH-Index: 5
Bu calismada, Rize yoresi obsidyeninin cimentonun hidratasyon isisini nasil etkiledigi arastirildi. Cimentoda yaygin olarak kullanilan mineral katkilardan ucucu kul ve yuksek firin curufunun cimentodaki hidratasyon isisina etkileri ile karsilastirildi. Obsidyen, ucucu kul ve yuksek firin curuflu cimentolarin basinc dayanimlari olculdu. Calisma sonucunda Rize yoresi obsidyeninin cimentonun hidratasyon isisini dusurdugu goruldu. Basinc dayanimi acisindan cimentoda puzolan olarak kullanilabilecegi ...
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#1İlker Ustabaş (Recep Tayyip Erdoğan University)H-Index: 5
#2Fatih DeşikH-Index: 2
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#1Fatih DeşikH-Index: 2
#2İlker UstabaşH-Index: 5
Bu calismada, kirectasi kokenli agrega icerisinde bulunan ince madde oraninin beton kivamina ve dayanimina olan etkileri arastirilmistir. Calisma kapsaminda iki farkli grupta on bes tane beton tasarimi yapilmistir. Birinci grupta 0.58-0.53-0.56 su/cimento oranina sahip, her farkli su/cimento oranindan ucer tane olmak uzere dokuz adet beton uretilmistir. Ikinci gruptaki betonlarin ise cokmeleri esit olacak sekilde su/cimento oranlari ayarlanmistir. Uretilen betonlarda kullanilan ince agreganin AS...
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#1Hasan Baltas (Recep Tayyip Erdoğan University)H-Index: 17
#2Murat Sirin (Recep Tayyip Erdoğan University)H-Index: 8
Last. A.M. El-Khayatt (Islamic University)H-Index: 15
view all 5 authors...
Abstract Incorporation of mineral and ores as fine aggregate additives was investigated for its effect on the neutron and gamma-ray shielding properties of cement mortar. Five mortar mixtures have been prepared with different proportions of additives ranging from 0% to 30% of the cement mass by weight. Evaluation of gamma-ray attenuation was both measured experimentally and computed by means of a software. The measurements have been carried out for ores and mortar samples using 59.54, 662 and 13...
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#1İlker Ustabaş (Recep Tayyip Erdoğan University)H-Index: 5
#2Ayberk Kaya (Recep Tayyip Erdoğan University)H-Index: 11
Abstract The use of pozzolan in cement provides economic advantages and improves the physico-mechanical properties of cement. Fly ash and blast furnace slag are widely used in cement as pozzolanic materials. In this study, obsidian known as volcanic glass which crops out in the Ikizdere (Rize) region of NE Turkey was investigated as a pozzolana in cement. Mainly the pozzolanic activity, chemical and physico-mechanical properties of the obsidian cement were compared to the properties of the fly a...
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