The Effect of Concrete Composition and Aggregates Properties on Performance of Concrete

Abstract

Abstract. The properties of the hardened concrete depend on the selected raw materials: size and amount of the particles of coarse aggregate, as well as on the ratio of other components. Particular countries use various methodologies for the selection of concrete composition to select the components of the concrete mixture. However, the properties of the concrete, selected by using any methodology for the selection of the concrete composition and hardened by following the defined conditions, must satisfy the values of certain necessary characteristics. The results of the implemented research indicate that the most optimal solution is to use the coarse aggregate of multi-fractional or discontinuous fractional composition. The optimal composition of the concrete must be selected to ensure that the binding material is not overdosed. Yet, all components must be selected in such a way, that the required properties of the final product are retained after concrete mixture hardens. When catalyst waste materials from the reactor of the catalytic cracking (15%) are used for the lightweight concrete, the density of the expanded-clay lightweight concrete investigated and compressive strength increases even for the higher water/cement ratio, more heat is dissipated during the hydration of the cement and this exothermic effect occurs several hours earlier.

Influence of Interfacial Transition Zone on Engineering Properties of the Concrete Manufactured With Recycled Ceramic Aggregate

“…Nowadays, there are intensive investigations carried out in order to utilize the different wastes (construction and demolition wastes, ceramic materials, asphalt, tyres, etc.) in the manufacture of new cements and concretes (Mačiulaitis et al 2009;Kavussi et al 2011). Concrete is usually considered as a heterogeneous material consisting of three main phases: aggregates, cement paste and the interfacial transition zone (ITZ) between aggregate/paste.…”

Application of Technogenic-Raw Material and Burning Out Additive in Composite Ceramic System

“…As shown by other research various wastes could by used in the manufactory of building ceramics. Generally the optimum quantity of wastes in formation mix is about 10 % − 20 % [3,8,18]. Different wastes could improve some properties of products (strength, density, frost resistance).…”

“…The used catalysts from the catalytic cracking reactor in oil refining are already being used in the manufacture of heat resistant concrete [5 -7]; the investigations of possibilities to apply the catalysts for ceramsite concrete [8], and ceramics [9 -11] are being performed.…”

Performance of Concrete Exposed to Freezing and Thawing in Different Saline Environments

“…The influence of concrete composition upon performance of concrete is well known (Mačiulaitis et al 2009). In particular, the behaviour of various types of concrete when subjected to freezing and thawing in the presence of de-icing salts has been investigated extensively, e.g.…”