*Proceeding Paper* **Three-Dimensional, Printable Paving Stone: A Preliminary Study †**

**Volkan Arslan \* and Zekeriya Dogan**

Department of Civil Engineering, Faculty of Engineering, Zonguldak Bulent Ecevit University, 67100 Zonguldak, Turkey


**Abstract:** Three-dimensional (3D) printing applications have emerged as a new production method in the construction industry. The materials that are to be used in 3D production process play an important role for a sustainable built environment. The main objective of this study is to design a suitable mixture to produce 3D printed concrete paving stones. In this respect, a unique 3D printer was also developed. The results show that the setting time of cement-based mortars was shortened by increasing the ratio of the added accelerator admixture. However, the optimum mixture proportions for 3D printed concrete paving stones were not reached. The results of the study are expected to develop a sustainable method of paving stone production.

**Keywords:** 3D printer; construction technology; construction material; paving stone
