Correlation between the point load index, I [sub]s (50), and the resistance to unconfined compression in limestone from the comunidad Valenciana, Spain

Manolo Galván (Author), Jorge Preciado (Author), Jose Serón (Author)

Abstract

The unconfined compression strength is one of the most important engineering parameters in rock mechanics; it is used to characterize and study the behaviour of solid rocks. A good correlation between the unconfined compression strength test (UCS) and the point load strength (PLS) can be very useful, because it allows for faster and cheaper testing than other methods with the same security to calculate the structures and performances of solid rocks. A preliminary step to implement the correlation is to have a good method to determine the resistance to a point load. This determination is correct if we have a sufficient number of tests on specimens of the same nature, but usually this does not occur, and it is necessary to apply a size-correction factor, F = (De/50)α, with α = 0.45. This paper is based on limestone from Comunidad Valenciana, Spain, because it represents a very high percentage of the rocks. The implementation was conducted over 700 field and laboratory tests, of which 255 are PLT tests, 45 are UCS tests, and the rest are other parameters, like porosity and specific weight, Slake Durability, and ultrasonic velocity.

Keywords

resistance to point load;point load strength;Franklin test;size correction factor;unconfined compression;

Data

Language:	English
Year of publishing:	2014
Typology:	1.01 - Original Scientific Article
Organization:	UM FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
UDC:	624.131.3:552.541
COBISS:	281011456
ISSN:	1854-0171
Parent publication:	Acta geotechnica Slovenica
Views:	644
Downloads:	47
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary title:	U korelacija med točkovnim trdnostnim indeksom I [spodaj] s(50) in enoosno tlačno trdnostjo apnenca iz Comunidad Valenciane (Španija)
Secondary abstract:	V mehaniki kamnin je enoosna tlačna trdnost ena od najpomembnejših lastnosti trdih kamnin, ki se uporablja za njihovo opisovanje in preučevanje obnašanja. Enoosno tlačno trdnost je mogoče oceniti tudi posredno iz točkovnega trdnostnega indeksa. V primeru dobre korelacije med obema parametroma je slednja metoda zelo uporabna, saj omogoča hitrejše in cenejše preizkušanje kamnin kot ostale metode. Prvi korak pri izpolnitvi te korelacije je izbira ustrezne metode za merjenje točkovne trdnosti kamnin. Le to je zanesljivejše, če obstaja zadostno število preiskav istovrstnih vzorcev, kar pa ni običajno, zato je potrebno uvesti ustrezen korekcijski faktor velikosti F = (De / 50)α, z α = 0.45. Prispevek obravnava rezultate preiskav apnenca iz Comunidad Valenciane (Španija), ki predstavlja velik delež njihovih kamnin. V okviru študije je bilo izvedenih več kot 700 terenskih in laboratorijskih preiskav, med njimi 255 preiskav točkovnega trdnostnega indeksa in 45 preiskav enoosne tlačne trdnosti kamnin. Na vzorcih so bile določene še poroznost in specifična teža, vodoodpornost in ultrasonična hitrost.
Secondary keywords:	mehanika kamnin;apnenec;točkovna trdnost;enoosna tlačna trdnost;
URN:	URN:SI:UM:
Type (COBISS):	Scientific work
Pages:	str. 34-45
Volume:	ǂVol. ǂ11
Issue:	ǂ[no.] ǂ2
Chronology:	2014
ID:	10941261