Influence of the Rheological Properties of SCC on the Formwork Pressure

Michał P. Drewniok; Grzegorz Cygan; Jacek Gołaszewski

doi:10.1016/j.proeng.2017.06.022

Influence of the Rheological Properties of SCC on the Formwork Pressure

Michał P. Drewniok, Grzegorz Cygan, Jacek Gołaszewski

Department of Architecture & Civil Engineering

Research output: Contribution to journal › Conference article › peer-review

15 Citations (SciVal)

Abstract

Formworks for self-compacting concrete (SCC) are commonly designed under the assumption of full hydrostatic pressure. However, current research shows that SCC's design pressure could be reduced, if the concrete's rheological properties were taken, into account. Knowing the relationship between the properties and the pressure, we can prevent formwork overdesign. This research was based, on the assumption that fresh concrete can be described as a Bingham fluid. This paper presents the correlations between static and dynamic yield stress, and lateral formwork pressure. Measured rheological parameters were compared to standard technical concrete tests. Formwork pressure were determined on the element imitating a column with dimensions of 0.20 x 0.20 m and a height of 1.20 m with two casting speeds 1 and 7 m/h. Three types of cement, 2 superplasticizers, and 2 w/c ratios were used. A correlation between rheological parameters and pressure reduction over time was observed. Based on our results we propose a methodology and testing sequence applicable in practice.

Original language	English
Pages (from-to)	124-129
Number of pages	6
Journal	Procedia Engineering
Volume	192
Early online date	22 Jun 2017
DOIs	https://doi.org/10.1016/j.proeng.2017.06.022
Publication status	Published - 31 Dec 2017
Event	12th International Scientific Conference Of Young Scientists On Sustainable, Modern and Safe Transport, TRANSCOM 2017 - , Slovakia Duration: 31 May 2017 → 2 Jun 2017

Bibliographical note

Funding Information:
This paper was elaborated with the financial support of the Project No. 842/B/T02/2011/40 "The influence of time and technological factors on rheological properties of self-compacting concrete in terms of the pressure on the formwork" financed by the from the National Science Centre in Cracow, Poland, project Innovative cementitious materials and concretes made with high - calcium fly ashes co-financed by the EU from the European Regional Development Fund and the project "DoktoRIS - Scholarship program for innovative Silesia" co-financed by the European Union under the European Social Fund. Research has been done in collaboration with HARSCO Infrastructure Poland (HUNNEBECK Poland). This work was developed while Michal Drewniok was at Silesian University of Technology, Faculty of Civil Engineering, Poland.

Publisher Copyright:
© 2017 The Authors.

Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.

Keywords

formwork pressure
fresh concrete
rheological properties
SCC

ASJC Scopus subject areas

General Engineering

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10.1016/j.proeng.2017.06.022Licence: CC BY-NC-ND

Cite this

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title = "Influence of the Rheological Properties of SCC on the Formwork Pressure",

abstract = "Formworks for self-compacting concrete (SCC) are commonly designed under the assumption of full hydrostatic pressure. However, current research shows that SCC's design pressure could be reduced, if the concrete's rheological properties were taken, into account. Knowing the relationship between the properties and the pressure, we can prevent formwork overdesign. This research was based, on the assumption that fresh concrete can be described as a Bingham fluid. This paper presents the correlations between static and dynamic yield stress, and lateral formwork pressure. Measured rheological parameters were compared to standard technical concrete tests. Formwork pressure were determined on the element imitating a column with dimensions of 0.20 x 0.20 m and a height of 1.20 m with two casting speeds 1 and 7 m/h. Three types of cement, 2 superplasticizers, and 2 w/c ratios were used. A correlation between rheological parameters and pressure reduction over time was observed. Based on our results we propose a methodology and testing sequence applicable in practice.",

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Influence of the Rheological Properties of SCC on the Formwork Pressure

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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