Summary
Subject:
MiKS project – WG3 meeting No 2
Date and time:
Location:
Participants:
29.04.2016, 10:00-15:00
Lyngby, DTU, Denmark
Rolands Cepuritis, NTNU [RC]
Stefan Jacobsen, NTNU [SJ]
Evgeny Ramenskiy, NTNU [ER]
Jon Spangenberg, DTU [JS]
Sverre Smeplass, Skanska [SS]
Distribution:
Participants, Ernst Mørtsell
Taken by:
Evgeny Ramenskiy [ER]
Summary MiKS WG3 meeting No 2
The primary objectives of WG3 established during the meeting No 2 are:
1. To obtain a matrix of data with rheological measurements performed with
FlowCyl and mini-slump test methods on a set of filler-modified cement pastes
where given composition parameters have been varied over a defined range.
The obtained results shall be used in order to derive a practical model of
predicting the influence on rheology of adding a specific crushed sand filler to
a given cement paste and consequently concrete.
2. To correlate the FlowCyl test measurements with the results obtained by a
rheometer.
3. To present the results on a series of the FlowCyl test simulations using the
Flow 3D software and
4. To analyse the effect of the yield shear stress (according to the Bingham
model) on the measured flow resistance ratio (λQ) acquired from both physical
measurements and computer simulations.
In order to meet the first objective, a setup of filler-modified cement paste composition
parameters for the FlowCyl and mini-slump flow tests will be identified, as outlined in
Table 1. The range/variants in the table are intentionally left out empty to be discussed
during the consecutive meetings. The setup of parameters should also be designed
with the following two considerations in mind:
 To identify and verify the FlowCyl test method as proficient in providing
accurate information on the matrix rheology and
 To recognise the FlowCyl test suitability for matrices with high filler content
when combined with low SP dosage in order to examine the inconsistency
shown in [1].
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Table 1 - Overview of some of the possible composition variables for the FlowCyl and
mini-slump flow tests.
Parameter
Range / Variants
Cement type
Norcem anlegg – CEM I 52.5 N
Norcem standard – CEM I 42.5 R
Norcem industry – CEM I 42.5 RR
Norcem standard FA – CEM II/B-M 42.5 N
Water – cement, w/c-ratio
TBC
Condensed silica fume, s/c-ratio
TBC
Pulverised fly ash, f/c-ratio
TBC
Ground-granulated blast-furnace slag, TBC - May be included as cement type
GGBS/c-ratio
Crushed fillers, grading
TBC
Crushed fillers, fi/c-ratio
TBC
Superplasticizer (EN934-2), SP/c-ratio TBC
To fulfil the second objective, a test programme will continue with the rheometer
analysis based on the parameter proposal in the Table 1. The time frame for the test
programme is to be confirmed, however, the free access to the rheometer at SINTEF
is until 12 Feb 2018.
To accomplish the third objective, the FlowCyl test simulations using the Flow 3D
software will initially require to select and confirm 10 data sets (along the line form
Rolands thesis) to check λQ. Evgeny and Jon will perform these numerical simulations.
Spreadsheet calculation of the flow resistance ratio λQ based on the FlowCyl test has
been provided by Sverre.
In order to correctly define parameters related to the numerical simulations, plastic
viscosity (μ) and shear yield stress (0) will be examined using the Anton Paar
viscometer at DTU by Jon and at NTNU by Evgeny. These parameters will be defined
for mixes with the following constituents:
 T1 and T6 fillers used for the SCC2016 study;
 Norcem industry cement – CEM I-42.5 RR.
The following materials to be sent by Evgeny to Jon:
 0.5 kg of both T1 and T6 fillers used for the SCC2016 study;
 0.5 g of Norcem industry cement – CEM I-42.5 RR.
Geometry of the FlowCyl test cone will be updated in the computer simulations (see
Figure 1). In addition, velocity profile plots of the FlowCyl cone cross-section simulation
will be prepared. Simulation will be performed with length of matrix stream without
bucket if it can be determined that a viscous liquid is not affecting the results.
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Figure 1 - FlowCyl geometry.
It is important to note that the FlowCyl setup diagram (see Figure 2) does not provide
a reference distance form the cone to the container sitting on the weight. It would be
advantageous to establish the reference distance as it determines the length of the
stream, possibly affecting the results.
Figure 2 - FlowCyl set up dimensions.
Trondheim, May 14th 2016
Evgeny Ramenskiy
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References
1.
2.
3.
Kjos-Hansen, H.S., 2015. Mikroproporsjonering- Effekt av fillergradering og
fillersammensetning. Prosjektoppgave, NTNU: Trondheim.
Applicability of the particle-matrix model to LWAC. The European Union –Brite EuRam
III. EuroLightCon BE96-3942/R12, March 2000.
Mørtsell E., Smeplass S. and Maage, M., 1995. Karakterisering av flytegenskapene I
betongens matriksfase. Instiutt for konstruksjonsteknikk, NTH. Betongindustrien okt
1995.
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