Relationship between polished stone value (PSV) and Nordic abrasion value (A N) of volcanic rocks

Abstract

A set of 39 different volcanic rocks was studied for performance as crushed stone for road surfacing (wearing course) aggregates using two technological tests: the polished stone value (PSV) test, aimed at evaluating resistance to polishing (skid resistance), and the Nordic abrasion value (A N ) test, as a proxy to wear by studded tires (resistance to abrasion). In order to understand better the observed relationships, the studied volcanic rocks were split into five petrographic-technological subgroups (rhyolite/porphyry, phonolites, basalts s.l., spilites, and melaphyres/diabase) based on their composition, rock fabric, geological age, and post-genetic history. Response of each of these subgroups to the applied tests is not always the same, but generally is controlled by composition and rock macro-and microfabric. Despite the fact that positive contributors to skid resistance (e.g., increasing contrasting hardness of rock-forming components, presence or absence of certain phenocrysts) have the opposite effect on wear by studded tires, it is not possible to make any reliable prediction of PSV from A N or vice versa.

Oligomictic alluvial aggregates: petro-mineralogical and geochemical evaluation of sandy gravel formations on the middle course of the Danube (Hungary)

“…However, contrary results were also published (Sajid and Arif 2015) where average coarse-grained texture with multi-modal distribution resulted in stronger matrix with lower porosity and water absorption values. Abrasivity is proved to correlate with quartz content and size rather than the grain shape or the chemical composition (Erichsen et al 2011;Hofer et al 2013;Er and Tuğrul 2016;Krutilová and Přikryl 2017). In long-term performance, resistivity to wear is also dependent on the petro-mineralogical composition and grain size (Gökalp et al 2016) Considering the above summarized observations on monomictic aggregates, some statements about multi-source aggregates and about the Hungarian alluvial sediments can be made.…”

“…In the case of natural oligo-polymictic sandy gravel mixtures, the contrasting hardness of rock-forming minerals (i.e. the average mineralogical composition of the lithotypes) is determinative (Krutilová and Přikryl 2017). It means that the predominance of the quartz-rich lithotypes (approx.…”

“…The significant amounts of potentially ASR reactive forms of silica in metamorphic rock fragments (Fig. 8) are micro-cryptocrystalline quartz, strained (deformed, stretched) quartz crystals with strain lamellae, subgraining and/or sutured/interlobate boundaries indicating bulging recrystallization (BLG), subgrain rotation recrystallization (SGR) or grain boundary migration (GBM) (Stipp et al 2002;Krutilová and Přikryl 2017). According to Passchier and Trouw (2005), these microstructural characteristics indicate deformation and recrystallization under middle temperature regimes and (Wigum 1995;Wenk et al 2008;Šachlová et al 2017).…”

“…accelerated mortar bar, concrete prism test). In addition, detailed SEM-PIA investigations (Šachlová et al 2016, 2017) and CL microscopy (Krutilová and Přikryl 2017) would improve the knowledge on the ASR potential of each lithotype in the oligomictic natural mixtures.…”

Effects of long-term magnesium sulfate crystallisation tests on abrasion and durability of andesite aggregates

“…This study describes the integrity loss process and the decay of the mechanical properties of rocks subjected to freezing-thawing and heating-cooling cycles. Several test methods are developed to provide information on the durability, serviceability (Přikryl 2017) and long-term performance of aggregates, such as the Los Angeles test (Cuelho et al 2008;Ajalloeian and Kamani 2017), the Nordic test (Krutilová and Přikryl 2017), the slake durability test (Ghobadi and Babazadeh 2015; Miščević and Vlastelica 2011) or the micro-Deval test (Török and Czinder 2017). The comparison of the weathering and the durability properties showed various correspondence, and the R 2 values of the micro-Deval versus magnesium sulfate value plots changed between 0.1 and 0.7 (Phillips 2000;Cooley and James 2003;Cuelho et al 2008).…”