Correlating uniaxial compressive strength with schmidt hardness, point load index, Young's modulus, and mineralogy of gabbros and basalts (northern Greece)

1996 ◽  
Vol 54 (1) ◽  
pp. 3-11 ◽  
Author(s):  
G. Aggistalis ◽  
A. Alivizatos ◽  
D. Stamoulis ◽  
G. Stournaras
Keyword(s):  
Compressive Strength ◽  
Young’S Modulus ◽  
Uniaxial Compressive Strength ◽  
Young's Modulus ◽  
Point Load ◽  
Northern Greece ◽  
Point Load Index ◽  
Schmidt Hardness

scholarly journals Sea-Ice Investigations In The Weddell Sea During The German Antarctic Expedition 1979-80

1983 ◽  
Vol 4 ◽  
pp. 246-252 ◽  
Author(s):  
Joachim Schwarz
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Sea Ice ◽  
Young’S Modulus ◽  
Uniaxial Compressive Strength ◽  
Young's Modulus ◽  
Weddell Sea ◽  
Ice Shelves ◽  
Antarctic Expedition ◽  
Ice Conditions

In the austral winter of 1979-80, a German Antarctic expedition was sent by ship to the Filchner and Ronne ice shelves in order to find a suitable site for the establishment of a permanent Antarctic station. During this expedition, investigations were carried out on sea ice in the Weddell Sea in order to evaluate the accessibility of the site for icebreaking ships which are intended to convey construction materials to the site and, later on, to supply the station annually.This paper covers the results of investigations on sea-ice conditions during the voyage along the ice shelves from Cape Fiske (at the base of the Antarctic Peninsula) to Atka Bay with emphasis on sea-ice conditions in the area about 100 km north-west of Berkner Island (Fig.1.). In addition to the drift conditions (speed, direction), a special feature of multi-year sea ice is described. The main part of the paper deals with mechanical properties such as flexural strength, uniaxial compressive strength and Young’s modulus of columnar-grained sea ice from the southern border of the Weddell Sea. Salinities and temperatures were measured over the depth of the ice and used for calculating the flexural strength and the Young’s modulus of the ice. The uniaxial compressive strength was investigated as a function of strain-rate, brine volume and temperature on a closed-loop testing machine on samples which were carried back from Antarctica to Hamburg.

Sea-Ice Investigations In The Weddell Sea During The German Antarctic Expedition 1979-80

1983 ◽  
Vol 4 ◽  
pp. 246-252
Author(s):  
Joachim Schwarz
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Sea Ice ◽  
Young’S Modulus ◽  
Uniaxial Compressive Strength ◽  
Young's Modulus ◽  
Weddell Sea ◽  
Ice Shelves ◽  
Antarctic Expedition ◽  
Ice Conditions

In the austral winter of 1979-80, a German Antarctic expedition was sent by ship to the Filchner and Ronne ice shelves in order to find a suitable site for the establishment of a permanent Antarctic station. During this expedition, investigations were carried out on sea ice in the Weddell Sea in order to evaluate the accessibility of the site for icebreaking ships which are intended to convey construction materials to the site and, later on, to supply the station annually.This paper covers the results of investigations on sea-ice conditions during the voyage along the ice shelves from Cape Fiske (at the base of the Antarctic Peninsula) to Atka Bay with emphasis on sea-ice conditions in the area about 100 km north-west of Berkner Island (Fig.1.). In addition to the drift conditions (speed, direction), a special feature of multi-year sea ice is described. The main part of the paper deals with mechanical properties such as flexural strength, uniaxial compressive strength and Young’s modulus of columnar-grained sea ice from the southern border of the Weddell Sea. Salinities and temperatures were measured over the depth of the ice and used for calculating the flexural strength and the Young’s modulus of the ice. The uniaxial compressive strength was investigated as a function of strain-rate, brine volume and temperature on a closed-loop testing machine on samples which were carried back from Antarctica to Hamburg.

scholarly journals ANALISIS PENGARUH TINGKAT PELAPUKAN TERHADAP KEKUATAN BATUAN (STUDI KASUS PADA BATULEMPUNG DARI FORMASI WARUKIN)

2021 ◽  
Vol 5 (3) ◽  
pp. 89
Author(s):  
Dini Ayu Hanifah ◽  
Eko Santoso ◽  
Kartini Kartini
Keyword(s):  
Compressive Strength ◽  
Uniaxial Compressive Strength ◽  
Point Load ◽  
Schmidt Hammer ◽  
Point Load Index

Penentuan tingkat pelapukan yang dilakukan pada penelitian ini menggunakan metode yang lebih sederhana dan sering digunakan serta dengan biaya yang terjangkau yaitu dengan pengamatan lapangan secara visual deskriptif dan pengujian di laboratorium berdasarkan uji UCS (Uniaxial Compressive Strength), Schmidt Hammer, dan PLI (Point Load Index). Metodologi yang dilakukan dan digunakan pada penelitian ini meliputi, data tingkat pelapukan berdasarkan pengamatan secara deskripsi visual yang mengacu pada penelitian terdahulu, data uji sifat fisik batulempung, dimensi batulempung, nilai rebound dari alat schmidt hammer, dan nilai kuat tekan batulempung menggunakan alat UCS (uniaxial compressive strength) dari 10 sampel batulempung, serta nilai PLI. Berdasarkan pengamatan lapangan secara visual deskriptif adapun tingkat pelapukan batulempung dalam penelitian ini termasuk ke dalam tingkat pelapukan III (lapuk sedang), IV (lapuk kuat), dan V (lapuk sempurna) yang mewakili 10 sampel ( mengacu pada penelitian Sadisun dkk, 1998 ). Sedangkan berdasarkan nilai UCS yang didapatkan dari nilai kuat tekan tertinggi sampai terendah dari 10 sampel yaitu sebesar 3,39 MPa masuk ke dalam tingkat pelapukan III (lapuk sedang), 1,98 MPa masuk ke dalam tingkat pelapukan IV (lapuk kuat), serta 0,63 MPa masuk ke dalam tingkat pelapukan V (lapuk sempurna). Berdasarkan hasil dari nilai rebound yang didukung dengan penelitian menurut ahli Hencer dan Martin (1982), tingkat pelapukan batulempung dalam penelitian ini masuk ke dalam highly weathered (lapuk kuat) dengan nilai rebound rata-rata sebesar N<25. Dan berdasarkan dari nilai PLI tingkat pelapukan pada penelitian ini masuk ke dalam tingkat pelapukan III dan IV. Kata-kata kunci: tingkat pelapukan, uniaxial compressive strength, schmidt hammer, point load index

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