The needle penetration index for estimating the physico-mechanical properties of pyroclastic rocks

IF 0.9 4区材料科学 Q3 Materials Science

Journal of The South African Institute of Mining and Metallurgy Pub Date : 2023-10-23 DOI:10.17159/2411-9717/1433/2023

S. Kahraman, I. Ince

引用次数: 0

Abstract

Preparation of suitable core specimens for physico-mechanical testing s not always possible, particularly for soft and clay-bearing rocks. Although several indirect test methods have been proposed to predict the properties of rocks, specimen preparation from soft rocks for some indirect tests is still difficult. For such cases, the needle penetration test has been developed. In this paper we present a study on the predictability of the physico-mechanical properties of pyroclastic rocks from the needle penetration index (NPI). The NPI, uniaxial compressive strength (UCS), Brazilian tensile strength (BTS), density, and porosity tests were performed in the laboratory on specimens from ten different locations in Turkey. Correlations were established between the NPI values and the physico-mechanical properties. Strong correlations were observed between NPI and both UCS and BTS. General correlations were found between NPI and both density and porosity.

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评价火山碎屑岩物理力学性质的针状穿透指数

制备合适的岩心试样进行物理力学试验并不总是可能的，特别是对于软质和含粘土的岩石。虽然已经提出了几种间接测试方法来预测岩石的性质，但从软岩中制备样品进行一些间接测试仍然很困难。针对这种情况，已经开发了针穿试验。本文研究了用针穿指数(NPI)预测火山碎屑岩物理力学性质的方法。NPI、单轴抗压强度(UCS)、巴西抗拉强度(BTS)、密度和孔隙率测试在实验室对来自土耳其十个不同地点的样品进行。建立了NPI值与材料物理力学性能之间的相关性。NPI与UCS和BTS之间存在很强的相关性。NPI与密度和孔隙度之间存在一般的相关性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The South African Institute of Mining and Metallurgy 工程技术-矿业与矿物加工

CiteScore

1.50

自引率

11.10%

发文量

审稿时长

4-8 weeks

期刊介绍： The Journal serves as a medium for the publication of high quality scientific papers. This requires that the papers that are submitted for publication are properly and fairly refereed and edited. This process will maintain the high quality of the presentation of the paper and ensure that the technical content is in line with the accepted norms of scientific integrity.