CONSISTENCY OF SCC AND ITS RELATIONSHIP WITH FORMWORK PRESSURE

I epartment of Building echnology, Gliwice, CSISEC F SCC IS RELISHIP IH FRMRK PRESSRE Jacek Gołaszewski, Ph., Sc. ssociate Professor Michał rewniok, MSCE Grzegorz Cygan, MSCE uium und orkshop Rheologische Messungen an mineralischen Baus

I SSEMICS F HE PRESEI 1.Introduction 2.Experimental research 3.Experimental results 4.Conclusions 5.References epartment of Building echnology, Gliwice, ceramicznych, szklarskich i ogniotrwałych. stroń 2010 2

I epartment of Building echnology, Gliwice, he influencei of time and technological factors on rheological properties of self compacting concrete in terms of the pressure on the formwork 2011-2014 he project is financed from the ational Science Centre o. 0842/B/02/2011/40 In cooperation with Harsco Infrastructure Regensburg, 06.03.2013 3

I epartment of Building echnology, IRCI Gliwice, PRPSE F HE RESERCH Knowledge about a nature of the rheological properties of SCC will enable to better understand the phenomena occurring in the processes related to casting a self-compacting concrete. nderstanding of the SCC thixotropic behaviour and the factors influencing that effect, will enable to practical use of this phenomenon to decrease concrete formwork pressure due to that mechanism. his will allow to optimum use of the formwork, by its proper design, particularly in terms of technology SCC. ceramicznych, szklarskich i ogniotrwałych. stroń 2010 4

I epartment of Building echnology, IRCI Gliwice, PRPSE F HE PRESEI Purpose of the presentation is to show relationship between consistency of SCC (rheological properties of SCC) and its influence on formwork pressure (small part of research). ceramicznych, szklarskich i ogniotrwałych. stroń 2010 5

I epartment of Building echnology, IRCI Gliwice, Fig. 1 SCC Formwork pressure for various rising Photo: kashispeeds of the concrete [1] Kaikyō Bridge (www.pl.wikipedia.org) ceramicznych, szklarskich i ogniotrwałych. stroń 2010 6

I epartment of Building echnology, IRCI Gliwice, Fig. 2 Examples of reperted form pressure when using SCC [2] ceramicznych, szklarskich i ogniotrwałych. stroń 2010 7

I epartment of Building echnology, Gliwice, EXPERIMEL RESERCH ceramicznych, szklarskich i ogniotrwałych. stroń 2010 8

I epartment of Building echnology, Gliwice, EXPERIMEL RESERCH he rheological parameters of SCC were determined by using a rheometer Viskomat XL Fig. 3 Circular probe for he rheological Viskomat XL www.schleibinger.com properties of fresh concrete was described by the Bingham model [3] Fig. 4 Viskomat XL www.schleibinger.com ceramicznych, szklarskich i ogniotrwałych. stroń 2010 9

I epartment of Building echnology, Gliwice, EXPERIMEL RESERCH g, h Fig. 5 Modified, according to the literature, Viskomat XL test procedure [4,5, Cheng] ceramicznych, szklarskich i ogniotrwałych. stroń 2010 10

I epartment of Building echnology, Gliwice, EXPERIMEL RESERCH echnical tests he slump flow test and t 50cm test (brams cone) E 12350 2 esting fresh concrete: Part 2: Slump test E 12350 8: Self-compacting concrete Slump-flow test Fig.6 Slump-flow test (Photo: M.rewniok, G.Cygan) ceramicznych, szklarskich i ogniotrwałych. stroń 2010 11

I epartment of Building echnology, Gliwice, EXPERIMEL RESERCH SESRS 6,7 20x20x120 SESRS 4,5 cm SESRS 2,3 Fig. 7 Labolatory SESR model 1 ceramicznych, szklarskich i ogniotrwałych. stroń 2010 12

I epartment of Building echnology, Gliwice, EXPERIMEL RESERCH Photos: Laboratory model (M.rewniok) ceramicznych, szklarskich i ogniotrwałych. stroń 2010 13

I epartment of Building echnology, Gliwice, EXPERIMEL RESERCH Fig. 8 Pressure sensors and its software ceramicznych, szklarskich i ogniotrwałych. stroń 2010 14

I epartment of Building echnology, Gliwice, EXPERIMEL RESLS ceramicznych, szklarskich i ogniotrwałych. stroń 2010 15

I epartment of Building echnology, Gliwice, EXPERIMEL RESLS SCC 7 SCC 1 SCC 13 Fig. 9 Correlation between R [cm] and g [mm] ceramicznych, szklarskich i ogniotrwałych. stroń 2010 16

I epartment of Building echnology, Gliwice, EXPERIMEL RESLS emperture 20 C ab.1 Materials and composition of Energia i środowisko w technologii mortar materiałów Regensburg, budowlanych, 06.03.2013 ceramicznych, szklarskich i ogniotrwałych. stroń 2010 17

I epartment of Building echnology, Gliwice, EXPERIMEL RESLS concrete casting Rising speed 1 m/h Fig. 10 SCC 13 Formwork pressure for different sensors ceramicznych, szklarskich i ogniotrwałych. stroń 2010 18

I epartment of Building echnology, Gliwice, EXPERIMEL RESLS bottom sensor Fig. 11 Formwork pressure for different SCC (SCC1, SCC7, SCC13) ceramicznych, szklarskich i ogniotrwałych. stroń 2010 19

I epartment of Building echnology, CCLSIS Gliwice, 1. Concrete mixtures which has very low yield stress and and very high plastic viscosity can reduce formwork pressure; 2. Concrete mixtures which has largest and fastest slump flow can made a higher formwork pressure ; 3. Increasing values of yield stress and plastic viscosity can reduce the formwork pressure. EX collumns 270 cm, 540 cm high and ceramicznych, szklarskich i ogniotrwałych. stroń 2010 20

I epartment of Building echnology, REFERECES Gliwice, [1] alraven J.: aylor made concrete: a new approach in materials design. elft niversity of echnology, Holland [2] Billberg P.: Form Pressure Generated by Self-Compacting Concrete Influence of hixotropy and Structural Behaviour at Rest. octoral hesis, Royal Institute of echnology, Stockholm, Sweden, 2006 [3] SBSKI J. red. Reologia w echnologii Betonu, Monografia. ydawnictwo Politechniki Śląskiej, Gliwice 2009 [4] KEHLER Eric P.: se Rheology to Specify, esign and Manage Self- Consolidating Concrete. 9th CI International Conference on Superplasticizers & 10th International Conference on Recent, Seville, Spain, ctober 2009, p. 609-623. [5] PEI J.., VHVE., IRQI E. HEL-MSS B.: Evaluation of the cement paste thixotrophy. Second International Symposium on esign, Performance and se of Self-Consolidating Concrete, SCC 2009, China, Beijing, China, June 5-7 2009, pp. 526-533. ceramicznych, szklarskich i ogniotrwałych. stroń 2010 21

I HK FR R EI epartment of Building echnology, Gliwice, 21. Kolloquium und orkshop Rheologische Messungen an mineralischen Baustoffen 9.02. und 01.03.2012, Regensburg uium und orkshop Rheologische Messungen an mineralischen Baus 22