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Printability and shape fidelity evaluation of self-reinforced engineered cementitious composites
Graphical abstract Display Omitted
Highlights 3D printable ECC mixes were developed by incorporating PVA fiber. Printability was assessed in terms of extrudability, buildability, and shape retention. The rheology and printability parameters were considerably enhanced with the inclusion of methylcellulose in ECC mixes. The rheological parameter ranges for satisfactory printability were 0.0089 to 0.0115 kPa.s, 0.237 to 1.08 kPa, and 1.45 to 3.17 kPa for plastic viscosity, dynamic yield stress, and static yield stress, respectively.
Abstract Incorporating fibers into Engineered Cementitious Composites (ECC) renders it a promising self-reinforced candidate for additive manufacturing, which can effectively address the challenges of reinforcement and automation. Considering this research challenge the current study aimed at designing 3D printable ECC mixes. The problems involved in the printability of ECC such as poor extrudability, buildability and shape retention, were addressed by utilizing the methylcellulose (MC) as a viscosity-modifying admixture. The results indicated that adding 1 % MC improved the fiber dispersion coefficient by 28 % and increased static yield stress in a range of 4 % to 237 % and plastic viscosity in the range of 247 % to 950 % in four different ECC mixes. Accordingly, the dimensional conformity of 3D printed filaments was considerably improved, and all designed ECC mixes meet the extrudability and buildability requirements.
Printability and shape fidelity evaluation of self-reinforced engineered cementitious composites
Graphical abstract Display Omitted
Highlights 3D printable ECC mixes were developed by incorporating PVA fiber. Printability was assessed in terms of extrudability, buildability, and shape retention. The rheology and printability parameters were considerably enhanced with the inclusion of methylcellulose in ECC mixes. The rheological parameter ranges for satisfactory printability were 0.0089 to 0.0115 kPa.s, 0.237 to 1.08 kPa, and 1.45 to 3.17 kPa for plastic viscosity, dynamic yield stress, and static yield stress, respectively.
Abstract Incorporating fibers into Engineered Cementitious Composites (ECC) renders it a promising self-reinforced candidate for additive manufacturing, which can effectively address the challenges of reinforcement and automation. Considering this research challenge the current study aimed at designing 3D printable ECC mixes. The problems involved in the printability of ECC such as poor extrudability, buildability and shape retention, were addressed by utilizing the methylcellulose (MC) as a viscosity-modifying admixture. The results indicated that adding 1 % MC improved the fiber dispersion coefficient by 28 % and increased static yield stress in a range of 4 % to 237 % and plastic viscosity in the range of 247 % to 950 % in four different ECC mixes. Accordingly, the dimensional conformity of 3D printed filaments was considerably improved, and all designed ECC mixes meet the extrudability and buildability requirements.
Printability and shape fidelity evaluation of self-reinforced engineered cementitious composites
Zafar, Muhammad Saeed (author) / Bakhshi, Amir (author) / Hojati, Maryam (author)
2023-10-03
Article (Journal)
Electronic Resource
English
ECC , Engineered Cementitious Composites , MC , Methylcellulose , FA , Fly ash , S , Slag , SF , Silica Fume , MK , Metakaolin , FRC , Fiber Reinforced Composites , OPC , Ordinary Portland Cement , SCM , Supplementary Cementitious Materials , RS , River Sand , PVA , Polyvinyl Alcohol , VMA , Viscosity Modifying Admixture , STD , Standard Deviation , CV , Coefficient of Variance , Additive manufacturing , Engineered cementitious composites , Extrudability , Buildability
Self-cleaning engineered cementitious composites
| Elsevier | 2015
Self-cleaning engineered cementitious composites
| Online Contents | 2015