The study of the structure rebuilding and yield stress of 3D printing geopolymer pastes

By Dawang Zhang, Dongmin Wang, X. Lin, Tao Zhang. Construction and Building Materials, 2018

141 citations recorded by the source corpus.

Abstract For 3D printing construction materials, workability and interlayer force of fresh printing pastes were necessary to ensured extrudability and buildability in the period from extrude to hardened of pastes. The workability and interlayer force of 3 Dimensional printing geopolymer pastes related to its rheological property and more particularly to its structure rebuilding and yield stress. The present study is aimed at investigating structure rebuilding and yield stress of 3 Dimensional printing geopolymer pastes at different Si/Na ratio of alkali activator by rheology method. Results revealed that rheology is an important research method for the extrudability and buildability of 3D printing geopolymer pastes. Structure rebuilding ability (SRE) and fast-growing yield stress of 3 Dimensional printing geopolymer ensured the stability of structure in the period from extrude to hardened of paste. Si/Na ratio of alkali activator has significantly influences on extrudability and buildability of 3D printing geopolymer pastes. High Si/Na ratio of alkali activator decreases the viscosity, yield stress and development rate of fresh pastes. Si/Na ratio of alkali activation significantly influences rate of structure rebuilding of pastes, and low Si/Na ratio of alkali activator exhibited high ability of recovery of pastes.

Subfields: Automotive Engineering, Building and Construction, Civil and Structural Engineering

View Paper: https://www.semanticscholar.org/paper/640cae6d38efa630c5dcb4adb0dece5af1096717

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Automotive Engineering

1. Shaodan Hou
2. Jun Ye
3. Jianzhuang Xiao
4. Z. Duan

In Building and Construction

1. Z. Duan
2. Jianzhuang Xiao
3. Shaodan Hou
4. Jun Ye
5. Jorge de Brito
6. Chi-Sun Poon

In Civil and Structural Engineering

1. Z. Duan
2. Shaodan Hou
3. Jun Ye
4. Jianzhuang Xiao
5. Jorge de Brito
6. Chi-Sun Poon

Citations in the corpus

• A review of 3D printed concrete: Performance requirements, testing measurements and mix design (2020, background): “Zhang et al. [158] indicated that the Si/Na ratio of the activator affected the rheological properties of the geopolymer.”