Relevant Petrological Properties and their Repercussions on the Final use of Aggregates

Anastasio, Sara; Pérez-Fortes, Ana Patricia; Кузнецова, Е. М.; Danielsen, Svein Willy

doi:10.1016/j.egypro.2016.10.073

Cited by 19 publications

(6 citation statements)

References 7 publications

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“…Increased content of mica reduces the mechanical strength. It was observed that about 15-20% of mica content in meta-greywacke aggregates did not compromise the fragmentation resistance (LA of 19%) while amphibolite aggregates with sparkle or no traces of mica content but high percentages of plagioclase and actinolite showed stronger resistance (LA of 9%) (Anastasio et al 2016;Fortes et al 2016).…”

Section: Dominance Of Primary Mineralsmentioning

confidence: 98%

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Review of the relationship between aggregates geology and Los Angeles and micro-Deval tests

Adomako

Engelsen

Thorstensen

et al. 2021

Bull Eng Geol Environ

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Rock aggregates constitute the enormous volume of inert construction material used around the globe. The petrologic description as igneous, sedimentary, and metamorphic types establishes the intrinsic formation pattern of the parent rock. The engineering properties of these rocks vary due to the differences in the transformation process (e.g. hydrothermal deposits) and weathering effect. The two most common mechanical tests used to investigate the performance of aggregates are the Los Angeles (LA) and micro-Deval (MD) tests. This study reviewed the geological parameters (including mineralogy, grain and crystal size, grain shape, and porosity) and the relationship to Los Angeles and micro-Deval tests. It was found that high content of primary minerals in rocks (e.g. quartz and feldspar) is a significant parameter for performance evaluation. Traces of secondary and accessory minerals also affect the performance of rocks, although in many cases it is based on the percentage. Furthermore, some studies showed that the effect of mineralogic composition on mechanical strength is not sufficient to draw final conclusions of mechanical performance; therefore, the impact of other textural characteristics should be considered. The disposition of grain size and crystal size (e.g. as result of lithification) showed that rocks composed of fine-grain textural composition of ≤ 1 mm enhanced fragmentation and wear resistance than medium and coarse grained (≥ 1 mm). The effect of grain shape was based on convex and concave shapes and flat and elongated apexes of tested samples. The equidimensional form descriptor of rocks somehow improved resistance to impact from LA than highly flat and elongated particles. Lastly, the distribution of pore space investigated by means of the saturation method mostly showed moderate (R = 0.50) to strong (R = 0.90) and positive correlations to LA and MD tests.

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Section: Dominance Of Primary Mineralsmentioning

confidence: 98%

“…Basalt usually has a strong-grained interlocking texture and oftentimes leads to greater resistance to fragmentation and abrasion (Waltham et al 1994). Granite, on the other hand, has varying granular textures and coarse-grained boundaries that increase brittleness (Anastasio et al 2016).…”

Section: Influence Of Grain Size and Crystal Sizementioning

confidence: 99%

Review of the relationship between aggregates geology and Los Angeles and micro-Deval tests

Adomako

Engelsen

Thorstensen

et al. 2021

Bull Eng Geol Environ

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“…The greatest loss in micro-Deval coefficient was observed after 15 sulfate crystallisation cycles at Andesite-3, which has amphiboles. The amphibole is a sensitive mineral to weathering, and it can adversely affect the durability of aggregates (Anastasio et al 2016).…”

Section: Discussionmentioning

confidence: 99%

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

Czinder

Török

2019

Bull Eng Geol Environ

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The durability of aggregates against salt weathering is calculated after five cycles of immersion in a magnesium sulfate solution followed by drying according to the relevant European standard (EN 1367-2: 2010). The aim of the study is to investigate the long-term durability of aggregates by increasing the number of cycles of the salt crystallization test from the standardized five to a maximum of 35. Three andesite types from Hungarian quarries were tested representing three different localities. The weight loss of the specimens was determined after every 5-cycle set. Results were documented for three size-fractions 10.0/11.2 mm, 11.2/ 14.0 mm and the 10.0/14.0 mm, respectively. Relationships between immersion-drying cycles and magnesium sulfate values were described by the Pearson-coefficient. According to the test results, the magnesium sulfate values followed linearly increasing tendencies in the course of the long-term salt crystallization tests. Parallel to the salt-weathering tests, the changes in the mechanical properties of the salt-attacked aggregates were also detected by micro-Deval tests (EN 1097-1: 2012). The changes in micro-Deval coefficients were calculated in the form of a decay factor as a function of sulfate cycles. The results suggest that the micro-Deval coefficient does not rise after a certain salt cycle; i.e. higher number of salt-crystallisation cycles does not necessarily reduce the micro-Deval coefficient of studied andesite lithologies.

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“…If the number of primary mineral percentages is not 100%, then the main mineral count is recalculated to 100%. Plot the percentage price of the main mineral into the diagram to get the name of the rock [25,27,28].…”

Section: Radialmentioning

confidence: 99%

Landslide geomorphology evaluation and geology structure analysis at Riau-West Sumatra highway in km 89-94

et al. 2019

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The research area is in the location hit by landslide frequently. Located in Riau-West Sumatra Highway in Km 89-94, Pangkalan Sub District, Lima Puluh Kota District, West Sumatra Province. The research objective to analyse the geomorphological conditions, which is relevance an increased vulnerability to landslides in the study area. The method used consist of geomorphology analysis using morphometric, morphography and morphogenetic parameters. The results of the analysis concluded that the geomorphology of the reserach area is classified into two: High Hills Steep Structural Geomorphology Unit (S2) dominates in all regions and Slightly Steep Hills Denudational Geomorphology Units (D3) is located in the Northeast, the percentages of distribution are 83%, and 17% respectively. Drainage pattern classified to parallel system. Lithology constituent consisting of claystone, siltstone, sandstone, and andesite. Structural geology analysis of joint show trend pattern to the Northwest -Southeast.

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Relevant Petrological Properties and their Repercussions on the Final use of Aggregates

Cited by 19 publications

References 7 publications

Review of the relationship between aggregates geology and Los Angeles and micro-Deval tests

Review of the relationship between aggregates geology and Los Angeles and micro-Deval tests

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

Landslide geomorphology evaluation and geology structure analysis at Riau-West Sumatra highway in km 89-94

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