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

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 w...

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Bibliographic Details
Published in:Minerals (Basel) 2018-12, Vol.8 (12), p.577
Main Authors: Petrounias, Petros, Giannakopoulou, Panagiota, Rogkala, Aikaterini, Stamatis, Panagiotis, Lampropoulou, Paraskevi, Tsikouras, Basilios, Hatzipanagiotou, Konstantin
Format: Article
Language:English
Subjects:
Aggregates
Bond strength
Bonding strength
Cement
Cement paste
Classification
Composition
Compressive strength
Concrete
concrete petrography
Concrete properties
construction aggregates
Engineering
engineering properties
Geology
Hydration
Interfaces
Investigations
Laboratories
Lithosphere
Mechanical properties
Mineralogy
Minerals
Moisture content
petrographic characteristics
Porosity
Quality
Sediments
Serpentine
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Summary: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 were derived from Veria-Naousa and Edessa ophiolitic complexes as well as granodiorite and albitite rocks from their surrounding areas in central Macedonia (Greece). Concretes were 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) presented the lowest concrete strengths, depending on their high alteration degree and the low mechanical properties of ultramafic aggregates. Group II (mafic rocks and granodiorite) presented a wide range of concrete strengths, depending on different petrographic characteristics and mechanical properties. Group III (albite rocks) presented the highest concrete strengths, depending on their lowest alteration degree and their highest mechanical properties. Therefore, mineralogy and microstructure of the coarse aggregates affected the final strength of the concrete specimens.
ISSN:2075-163X
2075-163X
DOI:10.3390/min8120577