Experimental analysis on rheological properties for control of concrete extrudability

Hojae Lee, Jang Ho Jay Kim, Jae Heum Moon, Won Woo Kim, Eun A. Seo

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


In this study, we examined the relationship among the rheological properties, workability, and extrudability in the construction of concrete structures using additive manufacturing. We altered the component materials (binder type, water-binder (W/B) ratio, sand ratio) to assess their effect on the rheological properties experimentally. The results indicated that the W/B and sand ratios had the largest effect on the rheological properties. In particular, when the sand ratio increased, it indicated that adjusting the sand ratio would facilitate control over the rheological properties. Additionally, we compared the rheological properties with the results of a traditional workability evaluation, namely the table flow test. This indicated the possibility of inferring the rheological properties by using traditional methods. Finally, we evaluated extrusion quantity according to table flow. The extrusion rate was 350 g/s for a flow of 210 mm and 170 g/s for a flow of 130 mm, indicating that extrusion rate increased as flow increased; however, we concluded that a flow standard of approximately 140-160 mm is suitable for controlling the actual extrusion quantity and rate.

Original languageEnglish
Pages (from-to)93-102
Number of pages10
JournalAdvances in Concrete Construction
Issue number1
Publication statusPublished - 2020 Jan 1

Bibliographical note

Publisher Copyright:
© 2020 Techno-Press, Ltd.

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Safety, Risk, Reliability and Quality
  • Mechanics of Materials


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