FARKLI SUYA DOYGUNLUK DERECELERİNDE BAZI SEDİMANTER KAYAÇLARDA TEK EKSENLİ SIKIŞMA DAYANIMININ DİĞER FİZİKO-MEKANİK ÖZELLİKLERDEN KESTİRİMİ

Yıl 2017, Cilt: 6 Sayı: 2, 681 - 691, 31.07.2017

Engin Özdemir Didem Eren Sarıcı

https://doi.org/10.28948/ngumuh.341854

Öz

   Mühendislik tasarımlarının pek çoğunda kayaçların
fiziko-mekanik özelliklerinin belirlenmesi önem taşımaktadır. Bu özelliklerin
en önemlilerinden bir tanesi olan tek eksenli sıkışma dayanımının
belirlenmesinde uygun laboratuvar koşullarının gerekliliği ve standartlara
uygun örnek hazırlamanın zorlukları bu parametrenin diğer fiziko-mekanik
özelliklerden istatistiksel metodlar kullanılarak tahmin edilmesi çalışmalarını
yaygınlaştırmıştır. Bu amaçla yapılan çalışmalarda kullanılan numuneler
genellikle kuru halde veya kontrol edilemeyen su içeriğine sahip olmaktadır. Bu
çalışmada üç farklı sedimanter kökenli kayaç numunesinde kontrollü şekilde suya doygunluk oluşturularak; kuru ağırlıkça
%35, 70 ve 100 doygun koşullarda iken tek eksenli sıkışma dayanımı (TESD),
nokta yükleme dayanımı, dolaylı çekme dayanımı (Brazilian), Schmidt ve Shore
sertliği, ultrasonik hız tayini deneyleri yapılmıştır. Basit ve çok değişkenli
regresyon analizleri ile tek eksenli sıkışma dayanımını diğer fiziko-mekanik
özelliklerden tahmin etmek için modeller geliştirilmiştir. Modellerin
geçerliliği incelendiğinde %70 ve 100 suya doygunluk koşullarında tek eksenli
sıkışma dayanımı ile diğer mekanik özellikler arasında güçlü ilişkilerin olduğu
(R²>90) görülmüştür.

Anahtar Kelimeler

Kayaç, nokta yükleme dayanım indeksi, Regresyon analizi, sertlik, suya doygunluk, tek eksenli sıkışma dayanımı

ESTIMATION UNIAXIAL COMPRESSIVE STRENGTH OF SOME SEDIMENTERY ROCKS FROM OTHER PHYSICO-MECHANICAL PROPERTIES AT DIFFERENT WATER SATURATION DEGREE

Öz

   The determination of the physico-mechanical properties of rocks is a
very important issue in a lot of engineering applications. Uniaxial compressive
strength (UCS) is one of the most important properties of rocks. The method to
determine it is relatively simple, but it is time consuming, expensive and
requires a well-prepared rock sample. For this reason, other physico-mechanical
properties are frequently used to predict the UCS. Specimens used in this kind
of work are either dry or have uncontrolled water content. This study aims to
develop models for estimating the UCS at any water content, and some laboratory
tests were carried out on different types of sedimentary rocks. For this
purpose the UCS, point load strength, Schmidt and Shore rebound hardness, ultrasonic wave velocity and Brazilian tensile
strength were determined for specimens at oven dried and 35, 70 and 100%
saturated specimens. Simple and multiple regression analyses were carried out.
The results showed that the predictive performance of models is good,
especially at 70 and 100% degree saturation, and they are very practical tools
to estimate the UCS at any water content using other mechanical properties.

Anahtar Kelimeler

Rock, hardness, point load strength, regression analysis, uniaxial compressive strength, water saturation

Kaynakça

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