Assessment of Some Waste Materials as Aggregate in Cementitious Composites

Abstract

Concrete is the most used building material in our world. With the increase in the world population, the need for concrete increases. As concrete production increases, the amount of aggregate used also increases and usable aggregate reserves are depleted over time. Experimental studies carried out to evaluate waste materials in concrete production have generally focused on materials that can be used instead of cement. Cement is the most costly and industrially produced material used in concrete. However, aggregates are the materials used in the highest volume in concrete production. Aggregates generally used in normal concrete are obtained from natural rocks. Evaluation of waste materials instead of aggregates used in concrete production becomes an important issue in terms of conservation of natural resources and disposal of wastes with an environmentalist perspective. In this study, recycled aggregate obtained from construction demolition wastes, waste marble dust and waste glass dust were used instead of natural aggregate in the cementitious composite mixtures to be produced. In the control sample, 0-4 mm sand from the Konya region was used, while in the other samples 10%, 20% and 30% of the waste materials were replaced with sand. Compressive, bending and water absorption tests were performed on the samples at the end of 7 days, and the test results of the samples obtained using different waste materials were compared with the control samples. As a result of this study, the optimum use of waste material was evaluated as 20% in the use of waste materials in the production of cementitious composites.