Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A Comparative Study of Point Load Index Test Procedures in Predicting the Uniaxial Compressive Strength of Sandstones
Abstract The point load index (PLI) test is one of the most frequently applied indirect methods in predicting the uniaxial compressive strength (UCS). Depending on the rock sample shape, the PLI test is performed in four procedures: axial, diametrical, block, and irregular lump tests. The present research aims to conduct a comparative study on the accuracy of these four procedures in predicting the UCS and evaluate the effect of density (ρ) and porosity (n) on the correlation between UCS and PLI. For this purpose, 15 different sandstone samples were collected from north Khorramabad, west of Iran. Some sandstone specimens were prepared for ρ, n, UCS, and PLI tests. Results indicated that PLI procedures have different accuracies in predicting the UCS, such that axial and irregular lump tests have the highest (R2 = 0.85) and the lowest (R2 = 0.70) accuracies, respectively. Moreover, the results of multivariate regression analysis revealed that n compared to ρ has a more important effect on the correlation between UCS and PLI (R2 = 0.87 and 0.92, respectively).
Highlights Depending on the rock sample shape, the point load index test (PLI) is performed in four procedures: axial, diametrical, block, and irregular lump tests.The accuracy of procedures proposed for four PLI tests in predicting the uniaxial compressive strength (UCS) for sandstone samples is investigated.This study also aims to evaluate the effect of density (ρ) and porosity (n) on the correlation between UCS and PLI.The PLI procedures have different accuracies in predicting the UCS, such that axial test has the highest accuracy.The multivariate regression analyses revealed that n compared to ρ has a more important effect on the correlation between UCS and PLI.
A Comparative Study of Point Load Index Test Procedures in Predicting the Uniaxial Compressive Strength of Sandstones
Abstract The point load index (PLI) test is one of the most frequently applied indirect methods in predicting the uniaxial compressive strength (UCS). Depending on the rock sample shape, the PLI test is performed in four procedures: axial, diametrical, block, and irregular lump tests. The present research aims to conduct a comparative study on the accuracy of these four procedures in predicting the UCS and evaluate the effect of density (ρ) and porosity (n) on the correlation between UCS and PLI. For this purpose, 15 different sandstone samples were collected from north Khorramabad, west of Iran. Some sandstone specimens were prepared for ρ, n, UCS, and PLI tests. Results indicated that PLI procedures have different accuracies in predicting the UCS, such that axial and irregular lump tests have the highest (R2 = 0.85) and the lowest (R2 = 0.70) accuracies, respectively. Moreover, the results of multivariate regression analysis revealed that n compared to ρ has a more important effect on the correlation between UCS and PLI (R2 = 0.87 and 0.92, respectively).
Highlights Depending on the rock sample shape, the point load index test (PLI) is performed in four procedures: axial, diametrical, block, and irregular lump tests.The accuracy of procedures proposed for four PLI tests in predicting the uniaxial compressive strength (UCS) for sandstone samples is investigated.This study also aims to evaluate the effect of density (ρ) and porosity (n) on the correlation between UCS and PLI.The PLI procedures have different accuracies in predicting the UCS, such that axial test has the highest accuracy.The multivariate regression analyses revealed that n compared to ρ has a more important effect on the correlation between UCS and PLI.
A Comparative Study of Point Load Index Test Procedures in Predicting the Uniaxial Compressive Strength of Sandstones
Jamshidi, Amin (Autor:in)
2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
BKL:
38.58
Geomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB41
Point Load Strength Index and Uniaxial Compressive Strength
| British Library Conference Proceedings | 1999
Predicting Uniaxial Compressive Strength by Point Load Test: Significance of Cone Penetration
| Online Contents | 2006
Predicting Uniaxial Compressive Strength by Point Load Test: Significance of Cone Penetration
| British Library Online Contents | 2006
Predicting Uniaxial Compressive Strength by Point Load Test: Significance of Cone Penetration
| Online Contents | 2006
Prediction of uniaxial compressive strength of sandstones using petrography-based models
| Online Contents | 2008