Özet:

In this study, the suitability of the use of waste marbles formed in marble processing factories in Tokat province as fine aggregate in concrete paving stones was investigated. CEM I 42.5 R type cement was used as binder in the mixtures. As aggregates, limestone-based crushed stone aggregate and waste marble aggregate were used. Tap water was used in the mixtures and no chemical additives were used. Within the scope of the study, natural aggregate gradation was prepared in accordance with the specifications of the Highways Technical Specification (2013) concrete paving stones. By keeping this gradation constant, waste marbles were substituted for the fine aggregate group of the aggregate mixture at the rate of 25%, 50%, 75% and 100%. In the sample groups with five different mixing ratios, which were subjected to five different tests, a total of 75 (5*5*3) concrete paving stone samples were prepared, 3 for each test. When the test results of the prepared samples were examined, it was seen that the specification limits were met in terms of size-appearance, water absorption rate, freeze-thaw resistance and abrasion resistance. When the split tensile strength properties are examined, it is seen that the samples prepared with 25% and 50% substituted marble aggregate show sufficient strength; On the other hand, it was observed that the samples prepared with 75% and 100% substituted marble aggregate did not provide sufficient strength. As a result, it has been determined that waste marbles can be used up to 50% as fine aggregate in concrete paving stones.

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