Evaluation and Analysis of the Influence of Aggregate Type on Selected Concrete Properties

The main objective of the study was to determine the impact of the use of various types of aggregates for C40/50 class concretes used in construction. As part of the research, concrete mixtures containing natural, artificial and recycled aggregates (dolomite, recycled aggregate, lightweight aggregate, basalt) were designed, as well as a reference mix. Selected characteristics of the mixtures were determined – consistency, viscosity, air content, density, as well as strength properties of concrete and frost resistance. Endurance tests were carried out after 2 and 28 days of maturation. Tests of water absorption and depth of penetration of water under pressure were also carried out. Based on the tests carried out, it was found that concrete mixes with a density close to 2321 kg/m³ and an air content of about 2.5% can be optimal in terms of compressive strength. Mixtures with a higher air content, on the other hand, can be beneficial in conditions that require high frost resistance.