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Bu çalışmada, atık araç lastiklerden geri dönüşüm ürünü olarak elde edilen siyah karbonun, yol taban zemininin stabilizasyonunda kullanılmasının, esnek yol üst yapı tabaka kalınlıklarına ve maliyetine etkileri araştırılmıştır. Bu amaçla, ilk olarak zayıf zemin elek analizi, hidrometre, kıvam limitleri ve piknometre deneylerine tabi tutularak özellikleri belirlenmiştir. Daha sonra zemine ağırlıkça %2,5 %5, %10, %15, %20 oranlarında siyah karbon ilave edilerek stabilize karışım numuneleri hazırlanmıştır. Saf ve katkılı zemin numuneleri ASTM D698 standardına göre standart proktor deneyine tabi tutulduktan sonra numuneler, 1 ve 7 günlük kür süresi sonrasında ASTM D2166 standardına göre serbest basınç deneyine tabi tutulmuştur. Deney sonucunda en yüksek mukavemet değeri %10 siyah karbon katkılı karışımlardan elde edilmiştir. Hazırlanan saf ve %10 siyah karbon katkılı numuneler 1 ve 7 günlük kür sonrasında ASTM D1883 standardına göre Kaliforniya Taşıma Oranı (CBR) deneyine tabi tutulmuştur. CBR değerinin %10 siyah karbon katkısı ile, 1 günlük kür sonunda 1,28 kat arttırdığı ve 7 günlük kür sonunda 1,77 kat arttırdığı tespit edilmiştir. Bu CBR değerleri kullanılarak AASHTO 1993 yöntemine göre esnek yol üst yapı tabaka kalınlıkları tasarımı yapılmış ve üst yapı maliyetleri değerlendirilmiştir. Hesaplamalar neticesinde, siyah karbon ile stabilize edilen zeminlerin üst yapı maliyetlerinin, 1 günlük kür sonunda %7,20 oranında ve 7 günlük kür sonunda %15,62 oranında düşüş gösterdiği tespit edilmiştir.
In this study, the effects of the use of black carbon, obtained as a recycling product from waste vehicle tyres, in the stabilization of the road base floor, on the thickness and cost of the flexible road upper building layer were studied. For this purpose, the characteristics were first determined by subjecting to weak ground elektrol analysis, hydrometer, weakness limits and picnometer experiments. Subsequently, a stabilized mixture sample was prepared with a weight of 2.5%; a weight of 5%; a weight of 10%; a weight of 15% and a weight of 20% of black carbon. After the standard proctor test was submitted to the pure and added ground samples according to the ASTM D698 standard, the samples were submitted to the free pressure test according to the ASTM D2166 standard after 1 and 7 days of curvation period. The test resulted in the highest strength value of 10 % black carbon added mixture. The prepared pure and 10% black carbon additive samples were tested in California Transportation Rate (CBR) according to ASTM D1883 after 1 and 7 days of course. The value of CBR was found to be increased 1.28 times at the end of the 1 day and 1.77 times at the end of the 7 day. With these CBR values, the flexible road upper building layer thickness is designed according to the AASHTO 1993 method and the upper building costs are assessed. According to calculations, the upper construction costs of black carbon-stabilized soils were found to decline by 7.20% at the end of the 1 day and 15.62% at the end of the 7 day.
In this study, the effects of using black carbon obtained as a recycling product from waste vehicle tires for stabilization of a road base floor on flexible road superstructure layer thickness and cost were investigated. Firstly, the properties of black carbon were determined by experimenting with weak soil sieve analysis, hydrometer consistency limits, and pycnometer test. Secondly, various mass ratios (2.5%, 5%, 10%,15%,20%) of black carbon were added to the mixture of stabilization samples. Pure and mixture samples were experimented with by using a proctor test according to the ASTM D698 standards. After 1 and 7 days curing period, they were experimented with under an unconfined compression test according to the ASTM D2166 standards. Experimental results showed that the highest strength values were obtained from the mass ratio of the 10% black carbon mixture sample. These samples were experimented with under a CBR test according to the ASTM D1883 standards after 1 and 7 days curing period. CBR value; It was determined that it increased 1.28 times at the end of 1 day of cure and 1.77 times after 7 days of cure. Using these CBR values, according to the AASHTO 1993 method; flexible road superstructure layer thicknesses were designed and their costs were evaluated. As a result of the calculations; It was determined that in case of improvement with 10% C by applying 1 and 7 days cure, the superstructure costs decreased by 5.13% and 14.37%, respectively.
Alan : Fen Bilimleri ve Matematik; Mühendislik
Dergi Türü : Uluslararası
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