Properties and durability of coarse igneous rock aggregates and concretes

Piasta, Wojciech; Góra, Jacek; Turkiewicz, Tadeusz

doi:10.1016/j.conbuildmat.2016.09.022

Cited by 47 publications

(24 citation statements)

References 10 publications

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“…The capillary porosity of the aggregate particles is essential for the cohesiveness of the concrete, and thus it is an important factor for the final quality. Igneous rocks have very different capillary pores relative to the majority of sedimentary and metamorphic lithotypes; therefore, they are expected to show dissimilar behaviour [8]. Microstructural characteristics such as microroughness, mineralogical composition, structure and compressive strength comprise some critical factors for the quality and strength of the concrete [9].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Alteration of Aggregates on the Quality of the Concrete: A Case Study from Serpentinites and Andesites from Central Macedonia (North Greece)

et al. 2018

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This study aims at the interpretation of the adverse effects of the secondary products in two types of rocks during their performance as concrete aggregates. Serpentinised peridotites contain serpentine, as the dominant secondary phase, which creates low microroughness on the particles and therefore unfavorable surfaces for cement paste to adequately adhere to. Moreover, its soft and platy nature contributes to the development of platy defects along the contacts of the aggregate particles with the cement paste. Poor adherence of the paste, failures along the contacts of the aggregate particles and potential propagation of the defects into the concrete during curing (and perhaps subsequently in-service) explain the poor performance of highly serpentinised rocks as concrete aggregates. Andesites show a different composition with a variety of secondary products including albite, chlorite, calcite, Fe-oxides and clay minerals. The role of all these products was investigated and it appears that only smectite is important, as even small amounts of it may be detrimental to the quality of the rocks as concrete aggregates. It is likely that abnormal hydration reactions and considerable swelling of the smectite result in the appearance of defects in the concrete, hence contributing to its low performance.

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Section: Introductionmentioning

confidence: 99%

The Influence of Alteration of Aggregates on the Quality of the Concrete: A Case Study from Serpentinites and Andesites from Central Macedonia (North Greece)

et al. 2018

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“…This standard intends to model the weathering effect, provided by growing crystals exerting pressure onto the pore walls using magnesium salt rather than ice crystals (freeze-thaw). For the cylindrical test specimens, crystallisation related durability can be assessed by standardised freeze-thaw tests (EN 12371: 2010), where ice crystals are forming in the pores of the stone material (Piasta et al 2016).…”

Section: Introductionmentioning

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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“…Nowadays, many researchers [11,[23][24][25] have endeavored to examine the effect of different lithotypes of aggregates but there are limited results about correlations between different types of aggregates on concrete strength. Ozturan and Cecen [26] have been focused on the influence of coarse aggregate type on mechanical properties of concretes made with basalt and gravel, which have given similar compressive strength, while limestone concrete attained a somewhat higher strength.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Petrographic Characteristics and Physico-Mechanical Properties of Aggregates on the Quality of Concrete

Petrounias¹,

Giannakopoulou²,

Rogkala³

et al. 2018

Preprint

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This paper examines the effect of the aggregate type on concrete strength and more specifically how the petrographic characteristics of various aggregate rocks as well as their physico-mechanical properties influences the durability of C 25/30 strength class concrete. The studied aggregate rocks are derived from Veria-Naousa and Edessa ophiolitic complexes as well as granodiorite and albitite rocks from their surrounding areas in central Macedonia (Greece). Concretes are produced with constant volume proportions, workability, mixing and curing conditions using different sizes of each aggregate type. Aggregates were mixed both in dry and water saturated states in concretes. Six different types of aggregates were examined and classified in three district groups according to their physicomechanical properties, petrographic characteristics and surface texture. The classification in groups after the concrete compressive strength test verified the initial classification in the same three groups. Group I (ultramafic rocks) presents the lowest concrete strengths, depending on their high alteration degree and the low mechanical properties of ultramafic aggregates. Group II (mafic rocks and granodiorite) presents a wide range of concrete strengths, depending on different petrographic characteristics and mechanical properties. Group III (albite rocks) presents the highest concrete strengths, depending on their lowest alteration degree and their highest mechanical properties. Therefore mineralogy and microstructure of the coarse aggregates affects the final strength of the concrete specimens.

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Properties and durability of coarse igneous rock aggregates and concretes

Cited by 47 publications

References 10 publications

The Influence of Alteration of Aggregates on the Quality of the Concrete: A Case Study from Serpentinites and Andesites from Central Macedonia (North Greece)

The Influence of Alteration of Aggregates on the Quality of the Concrete: A Case Study from Serpentinites and Andesites from Central Macedonia (North Greece)

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

The Effect of Petrographic Characteristics and Physico-Mechanical Properties of Aggregates on the Quality of Concrete

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