Određivanje vlačnih svojstava geosintetika

master's thesis

• Title (english): Determination of tensile properties of geosynthetics
• Author: Ana Lesičar
• Mentor: Boris Kavur (mentor)
• Committee member: Sanja Kovač (predsjednik povjerenstva)
• Committee member: Boris Kavur (član povjerenstva)
• Committee member: Stjepan Strelec (član povjerenstva)
• Committee member: Mario Gazdek (član povjerenstva)
• Granter: University of Zagreb; Faculty of Geotechnical Engineering; Varaždin
• Defense date and country: 2022-07-14, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences; Environmental Engineering

Abstract

U radu su opisani geosintetici i njihova svojstva. Istraživanje u okviru teme diplomskog
rada provedeno je na uzorcima geotekstila i geomreže.
U prvom dijelu rada analizirano je ponašanje netkanog geotekstila u vlačnim
ispitivanjima obavljenim prema normi HRN EN ISO 10319. Uzorci geotekstila
poznatog i renomiranog europskog proizvođača uzorkovani su u okviru kontrolnih
ispitivanja vlačnih svojstava prema navedenoj normi. Obrađeno je 17 ispitivanja istog
tipa proizvoda korištenog pri geotehničkim zahvatima u R. Hrvatskoj tijekom perioda
od 1,5 godine u kojem proizvođač nije mijenjao tehničke specifikacije ispitivanog
proizvoda. Vlačna ispitivanja su obavljena orijentacijom uzorka uzdužno, poprečno i
dijagonalno u odnosu na smjer proizvodnje. U svakom smjeru ispitano je po 5 ispitnih
uzoraka. Rezultati ispitivanja su ovdje prikazani i statistički analizirani.
U drugom dijelu rada istraživana je mogućnost primjene ispitnog postupka EOTA TR
41, koji je razvijen za vlačno ispitivanje troosnih geomreža, za dvoosne mreže koje se
standardno ispituju prema normi HRN EN ISO 10319 u smjeru proizvodnje (MD) i
okomito na smjer proizvodnje (CMD). Hipoteza ovog istraživanja bila je da se
ispitivanje dvoosne geomreže može obaviti u raznim smjerovima tako da se ispitni
uzorak ugradi u kidalicu s odgovarajućom orijentacijom. Dvoosna geomreža od
poznatog i renomiranog proizvođača podvrgnuta je tako ispitivanjima vlačnih svojstava
u kojima je kut između osi proizvodnje i smjera ispitivanja bio: 0°, 30°, 45°, 60° i 90°.
U radu su prikazane i analizirane dobivene vlačne čvrstoće pri deformacijama 0.5, 1 i 2
%, te maksimalne vlačne čvrstoće za svaki smjer.

Abstract (english)

The paper describes geosynthetics and their properties. The research, within the topic of
the diploma thesis, was conducted on samples of geotextiles and geogrid.
The first part of the paper analyses the behavior of nonwoven geotextiles in tensile tests
performed according to the standard HRN EN ISO 10319. Several samples of
geotextiles from a well-known and reputable European manufacturer were sampled as
part of control tests of tensile properties according to the specified standard. Seventeen
tests of the same type of product were processed. This product was used in geotechnical
projects in Croatia during a period of 1,5 years in which the manufacturer did not
change the technical specifications of the tested product. Tensile tests were performed
by orienting samples longitudinally, transversely and diagonally in relation to the
direction of production. In each direction 5 test samples were tested. The test results are
presented and statistically analyzed here.
The second part of the paper investigates the possibility of applying the EOTA TR 41
test procedure, which is originally developed for triaxial geogrids, for biaxial geogrid
that is usually tested according to HRN EN ISO 10319 in the direction of production
(MD, machine direction) and perpendicularly to it (CMD, cross-machine direction). The
hypothesis of this research was that the testing of a biaxial geogrid can be performed in
various directions by fitting the test sample into jaws with the appropriate orientation.
The biaxial geogrid from a well-known and renowned manufacturer was subjected to
tensile tests in which the angle between the production axis and the test direction was:
0°, 30°, 45°, 60° and 90°. This paper presents and analyzes the obtained tensile
strengths at deformations of 0.5, 1 and 2%, and the maximum tensile strengths for each
direction.

• Keywords: geosintetici; vlačna svojstva; geomreža; geotekstil
• Keywords (english): geosynthetics; tensile properties; geogrid; geotextile
• Language: croatian
• URN:NBN: urn:nbn:hr:130:314845
• Study programme: Title: Geoenvironmental Engineering; specializations in: Geoenvironmental Engineering, Environmental Management, Water Management; Course: Geoenvironmental Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/ inženjerka inženjerstva okoliša (magistar/magistra inženjer/ inženjerka inženjerstva okoliša)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-01-19 08:43:21