Strength and abrasive properties of andesite: relationships between strength parameters measured on cylindrical test spe
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S.I. : AGGREGATES
Strength and abrasive properties of andesite: relationships between strength parameters measured on cylindrical test specimens and micro-Deval values—a tool for durability assessment Balázs Czinder 1 & Ákos Török 1 Received: 20 December 2019 / Accepted: 26 September 2020 # The Author(s) 2020
Abstract Aggregates are necessary materials for the construction industry. Owing to their favourable properties, andesites are frequently used rock materials; hence, the investigation of their mechanical and aggregate properties has great significance. This paper introduces the analyses of 13 Hungarian andesite lithotypes. The samples were collected from six andesite quarries in Hungary. Cylindrical specimens and aggregate samples with 10.0/14.0-mm-sized grains were made from rock blocks. The specimens were tested in dry, water-saturated and freeze–thaw subjected conditions. Bulk density, uniaxial compressive strength, modulus of elasticity, indirect tensile strength and water absorption were measured. The abrasion resistance was tested by micro-Deval tests. The flakiness indexes of the samples were also measured. The data set of the laboratory test results provided input for further, one- and two-variable statistical analyses. According to the test results, there is no significant difference between the strength parameters measured in water-saturated and in freeze–thaw subjected conditions. The correlation and regression analyses revealed relationships between some rock mechanical parameters, as well as between micro-Deval coefficient and uniaxial compressive strength. Keywords Andesite . Uniaxial compressive strength . Micro-Deval value . Correlation
Introduction Natural stones are essential building materials, as they are used as dimension stones and aggregates (Přikryl 2017). Their applicability is controlled by their mechanical properties. Andesite, which is one of the most common igneous rock types in Hungary, has favourable properties. It is often used as aggregate, in concrete (Zhang et al. 2013; Beushausen and Dittmer 2015), road (Xu et al. 2015; Kong et al. 2017) and railway constructions (Gálos and Kárpáti 2007; Ferestade et al. 2017), or as armour stone in hydraulic engineering (Ertas and Topal 2008; Ozden and Topal 2009). Numerous test methods have been introduced to evaluate the aggregate properties: the polished stone value (PSV) test (Szatkowski and Hoskings 1972; Descantes and Hamard
* Ákos Török [email protected] 1
Department of Engineering Geology and Geotechnics, Budapest University of Technology and Economics, Műegyetem rkp. 3, Budapest H-1111, Hungary
2015), the aggregate impact (AIV) test (Afolagboye et al. 2017), the aggregate crushing value (ACV) test (Shipway 1964; Palassi and Danesh 2016), the Nordic test (Eerola et al. 1982; Erichsen et al. 2011), the Hummel test (Hummel 1954; Reznák et al. 1982), the Stübel test (Reznák and Ács 1965), the slake durability test (Hudec 1978; Ghobadi and Babazadeh 2015; Miščević and Vlastelica 2011) and many more. Nowadays, the Los Angeles (
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