A study on the optimization of superplasticizer and water-to-binder ratio for enhancing 3D printable concrete with marble powder waste

This study focuses on developing a 3D-printable concrete mix by optimising the superplasticizer dose and waterto-binder ratio while substituting 10% of marble powder waste as a cement replacement.The step-by-step methodology for achieving the optimal 3D printable material mix is outlined, encompassing the mix proportions, material fineness, and the procedures involved.Experimental investigations were carried out using a 3D Printer, including tests for flow, extrudability, and buildability to refine the printable mix and compressive strength tests were carried out.The optimal mix was achieved by adjusting the water-to-binder ratio, and superplasticizer dosage.The results show that a printable mix with 0.35% SP dosage, 0.35 w/b ratio, and 10% marble powder replacement exhibits superior printing quality.