AGGREGATE AS A COMPONENT IN THE PROCESS OF CONCRETE MAKING

Abstract

<p style="text-align: justify;">By modern design of the concrete system, proper selection of cement and aggregates with appropriate additives as well as other concrete production procedures, satisfactory properties of the finished concrete mass can be achieved. When making concrete, aggregate makes up approximately three-quarters of its volume, which has a great influence on the properties of fresh and hardened concrete. Due to its significantly greater stiffness than that of cement stone, large aggregate grains form the basis of concrete through which forces are transmitted. Small aggregate grains together with cement paste make up the mortar. Although the role of coarse grains and sand in fresh and hardened concrete is different, they are observed together in all tests. The choice of aggregate depends on several factors, where we would especially emphasize its availability. Its characteristics such as: plasticity, workability, strength, density, durability, permeability, texture and color largely depend on the type and quality of the aggregate used in the process of making concrete. It is available to everyone because it is actually a composite material whose basic ingredients are aggregate, cement, water and other necessary additives. This paper will deal with the division of aggregates as well as the most frequently investigated properties of aggregates. </p>