Uticaj mineraloško-petrografskih karakteristika na mikrohrapavost agregata bazičnih stena Srbije
Influence of mineralogical and petrographical characteristics on aggregate microroughness of basic igneous rocks from Serbia
Author
Đokić, Olivera M.Mentor
Šarić, Kristina
Committee members
Matović, VesnaErić, Suzana
Simić, Vladimir

Mladenović, Goran

Metadata
Show full item recordAbstract
Koeficijent poliranja kamena (Polished Stone Value - PSV) jedan je od glavnih faktora
u proceni kvaliteta agregata koji se koristi za izradu habajućeg sloja na putevima. Ovaj
koeficijent odražava mikrohrapavost agregata koja utiče na ukupnu otpornost prema
klizanju puta i bezbedost vožnje. Prethodne studije pokazale su da postoje veze između
petrografije, polirnosti i drugih tehničkih svojstava kamena i agregata, ali njihovi
međusobni odnosi unutar homogene grupe stena do sada nisu ispitivani. Cilj ove
disertacije bio je da se uspostavi jasna veza između mineralnog sastava, mikrosklopa,
alteracionih produkata izabranih bazičnih magmatskih stena i PSV-a sa jedne strane, i
posledično PSV-a i drugih tehničkih svojstava kamena i agregata, sa druge strane.
Mineraloško-petrografska analiza ispitivanih bazičnih magmatskih stena pokazala je da
njihove karakteristike poput mineralnog sastava, stepena alteracije i strukture značajno i
sinhronizovano utiču na mikrohrapavost. Tako, najniže PSV vre...dnosti imaju bazične
stene sa finozrnastom do finoofitskom strukturom u kojima su prisutni samo minerali sa
relativnom tvrdinom većom od 5. Mikrohrapavost se povećava ukoliko stena: a) ima
porfirsku strukturu, b) sadrži mineralne vrste koje pokazuju uznapredovali stepen
alteracije, c) ima elemente porfiroidne strukture, d) ima povećan sadržaj određenih
sporednih minerala, e) sadrži homogeno raspoređene mandole zapunjene sekundarnim
mineralima različite tvrdine, f) ima krupnoofitsku, odnosno krupnozrniju strukturu, g)
sadrži više od 15% minerala sa niskom relativnom tvrdinom, h) sadrži mineralne vrste
koje imaju mrežu mikroprslina i šupljina. Posledično, najviše PSV vrednosti imaju
bazične stene sa krupnoofitskom strukturom, značajnim stepenom alteracije primarnih
minerala i gustom mrežom mikropukotina i šupljina pojedinih minerala (na primer
plagioklasa i/ili klinopiroksena). Pojedinačne mineraloško-petrografske karakteristike
utiču, ali ne daju značajnu zavisnost u odnosu na PSV vrednosti...
Polished Stone Value (PSV) is one of the main factor in estimating the quality of
aggregates used for wearing courses. This coefficient reflects the aggregate
microroughness, which is important for skid resistance and safe driving. Previous
studies have shown that there are relationships between petrography, Polished Stone
Value and other technical characteristics of stone and aggregates, but their relationships
within the homogeneous groups of rocks have not been investigated. The objective of
this dissertation was to establish a clear link between mineral composition, microfabric,
alteration products of basic rocks and PSV at one side, and consenquently PSV and
other technical characteristics of stone and aggregates, at the other. Mineralogical and
petrographic analysis of examined basic igneous rocks showed that their characteristics
such as mineral composition, degree of alteration and fabric have significant and
synchronized influence on microroughness. Thus, the lowest PSV value ...have basic
rocks with fine-grained to fine-ophitic texture that have minerals with relative hardness
higher than 5. Microroughness successively increases if stone: a) has porphyry texture,
b) contains minerals that show advanced degree of alteration, c) has elements of
porphyric texture, d) has a higher content of minor minerals, e) contains homogeneously
distributed mandola filled with a different hardness secondary minerals, f) has a
largeophitic, or coarse grained structure, g) contains more than 15% of minerals with
low relative hardness, h) contains minerals which have a network of microcracks and
voids. Consequently, the highest PSV values have basic rocks with coarseophitic
texture, a significant degree of alteration of primary minerals and with a network of
microcracks and voids on certain minerals (such as plagioclase and/or clinopyroxene).
Single mineralogical and petrographic characteristics influence, but does not give a
significant dependence with PSV values...