Printability characterization of graphene-reinforced cementitious composites

Ugur Kilic; Zhangfan Jiang; Ji Ma; Osman E. Ozbulut

doi:10.1117/12.2585595

22 March 2021 Printability characterization of graphene-reinforced cementitious composites

Ugur Kilic, Zhangfan Jiang, Ji Ma, Osman E. Ozbulut

Proceedings Volume 11589, Behavior and Mechanics of Multifunctional Materials XV; 1158904 (2021) https://doi.org/10.1117/12.2585595
Event: SPIE Smart Structures + Nondestructive Evaluation, 2021, Online Only

Abstract

The cement-based additive manufacturing, commonly known as 3D concrete printing, facilitates the use of advanced cementitious materials in construction as this construction technique minimizes waste and enables the optimal placement of the material. 3D printable cementitious mixtures should have specific consistency for successful manufacturing. In particular, they should be extruded smoothly during the printing process while maintain their shape after deposition, both of which are closely related to the rheological properties of cementitious mixture. The use of graphene in cementitious composites has been widely explored in recent years and it was shown that graphene can improve the mechanical properties and durability of cementitious composites. However, the rheological properties and printability characteristics of graphene-reinforced cementitious materials still remain underexplored. This study investigates the effects of graphene nanoplatelets (GNPs) on rheological and printability characteristics of GNP-reinforced cementitious composites. GNPs are added into cementitious mixtures, designed for 3D concrete printing applications, at concentration of 0%, 0.05%, 0.10%, 0.15%, 0.20%, and 0.25% by weight of cement. GNPs are first dispersed into water through the help of ultrasonic treatment and a polycarboxylate-based superplasticizer. The dispersion quality of GNPs is assessed through UV-vis absorption spectroscopy, optical microscopy, and Raman spectroscopy. Then, the rheological properties of GNP-reinforced mortar composites are studied using a shear rheometer via stress-growth tests, shear rate ramp up-down tests, and structural recovery tests.

Conference Presentation

Citation Download Citation

Ugur Kilic, Zhangfan Jiang, Ji Ma, and Osman E. Ozbulut "Printability characterization of graphene-reinforced cementitious composites", Proc. SPIE 11589, Behavior and Mechanics of Multifunctional Materials XV, 1158904 (22 March 2021); https://doi.org/10.1117/12.2585595

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