INFLUENCE OF WASTE FACE MASK ON UNCONFINED COMPRESSION TEST STRENGTH AND SHEAR WAVE VELOCITY OF LOW PLASTICITY CLAY

Year 2024, , 1297 - 1306, 12.08.2024

Yağmur Uzunkaya , Eren Balaban , Burak Görgün

https://doi.org/10.31796/ogummf.1407114

Abstract

Use of disposable face masks has increased significantly around the world with the Covid-19 pandemic. While the increase in these used masks poses a great threat to the environment, their disposal has also emerged as a problem. It was thought that the use of face masks in soil improvement would be a method to solve this problem. Therefore, 0.5*3 cm sized face masks were added to low plasticity clay with a ratio of 0.2-0.4-0.6-0.8-1%. Samples are prepared at different unit weights. Unconfined compression and bender element tests are conducted to determine the effects of face masks to strength and small strain stiffness. Unconfined compression test results showed that the face mask inclusion increased the strength up to a certain extent and then decreased the strength. Shear wave velocity of the samples decreased for high unit weights but, increased initially and then decreased in case of low unit weight samples.

Keywords

Waste face mask, Bender element, Unconfined compression strength, Maximum shear modulus, Soil improvement

ATIK YÜZ MASKESİNİN DÜŞÜK PLASTİSİTELİ KİL ZEMİNİN SERBEST BASINÇ MUKAVEMETİNE VE KAYMA DALGASI HIZINA ETKİSİ

Abstract

Covid-19 pandemisi ile birlikte dünya genelinde tek kullanımlık yüz maskesi kullanımı büyük artış göstermiştir. Bu kullanılmış maskelerin artışı çevre için büyük tehdit oluşturmakla birlikte, bertaraf edilmesi de problem olarak ortaya çıkmıştır. Bu problemin çözümü için yüz maskelerinin zemin iyileştirmede kullanımının bir yöntem olacağı düşünülmüştür. Bu nedenle 0,5*3 cm boyutlarındaki yüz maskeleri %0,2-0,4-0,6-0,8-1 oranlarında düşük plastisiteli kil ile karıştırılarak Bender element ve Serbest basınç deneylerine tabi tutulmuştur. Yapılan serbest basınç deney sonuçlarına göre yüz maskesinin belirli bir orana kadar dayanımı arttırdığı, daha sonra ise dayanımı düşürdüğü görülmüştür. Yapılan bender element testlerine göre maske liflerinin yüksek birim hacim ağırlıkta kayma dalgası hızının azalmasına ancak düşük birim hacim ağırlığındaki numunelerde kayma dalgası hızının öncelikle arttığı, daha sonra azaldığı görülmüştür.

Keywords

Atık yüz maskesi, Bender element, Serbest basınç dayanımı, Maksimum kayma modülü, Zemin iyileştirilmesi

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