TY - JOUR
T1 - Influence of the Rheological Properties of SCC on the Formwork Pressure
AU - Drewniok, Michał P.
AU - Cygan, Grzegorz
AU - Gołaszewski, Jacek
N1 - 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.
PY - 2017/12/31
Y1 - 2017/12/31
N2 - 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.
AB - 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.
KW - formwork pressure
KW - fresh concrete
KW - rheological properties
KW - SCC
UR - http://www.scopus.com/inward/record.url?scp=85022083566&partnerID=8YFLogxK
U2 - 10.1016/j.proeng.2017.06.022
DO - 10.1016/j.proeng.2017.06.022
M3 - Conference article
AN - SCOPUS:85022083566
VL - 192
SP - 124
EP - 129
JO - Procedia Engineering
JF - Procedia Engineering
SN - 1877-7058
T2 - 12th International Scientific Conference Of Young Scientists On Sustainable, Modern and Safe Transport, TRANSCOM 2017
Y2 - 31 May 2017 through 2 June 2017
ER -