scholarly journals Slump Test: A New Empirical Model for High Yield Stress Materials

2021 ◽  
Vol 11 (2) ◽  
pp. 107-112
Author(s):  
H. Kemer ◽  
R. Bouras ◽  
M. Sonebi ◽  
N. Mesboua ◽  
A. Benmounah
Keyword(s):  
Yield Stress ◽  
Present Model ◽  
High Yield ◽  
Flow Curves ◽  
Cement Pastes ◽  
Slump Test ◽  
High Yield Stress ◽  
Rate Controlled ◽  
Cylindrical Mold ◽  
Plate Geometry

Abstract In order to decrease the fitting deviation between rheometrical measurements and empirical parameters using slump test, this paper proposes a new analytical method to evaluate the high yield stress of materials (cement pastes).In doing so, an experimental study was performed for measuring the empirical characteristics by cylindrical mold with different water to binder ratios (w/b) by aiming to increase the yield stress. Parallelly, experimental observations showed clearly the unyielded zone at flow stoppage of high yield stress samples. Based on these results, an idea was formed to applied metallic element at inlet of mold in order to push the spreading of paste. The obtained results of the model proposed in this paper were compared with the yield stress evaluated from shear flow curves using AR2000-rheometer with plate-plate geometry at rate-controlled. In fact, this study demonstrates the applicability and novelty of the present model in the process of relating the empirical parameters to yield stress.

Electrorheological fluid with an extraordinarily high yield stress

2002 ◽  
Vol 80 (5) ◽  
pp. 888-890 ◽  
Author(s):  
Yuling Zhang ◽  
Kunquan Lu ◽  
Guanghui Rao ◽  
Yu Tian ◽  
Shaohua Zhang ◽  
...  
Keyword(s):  
Yield Stress ◽  
Electrorheological Fluid ◽  
High Yield ◽  
High Yield Stress

Testing Procedures on Materials to Formulate the Ink for 3D Printing

2020 ◽  
Vol 2674 (2) ◽  
pp. 21-32 ◽  
Author(s):  
Malo Charrier ◽  
Claudiane Ouellet-Plamondon
Keyword(s):  
3D Printing ◽  
Yield Stress ◽  
Three Dimensional ◽  
Testing Procedure ◽  
Full Potential ◽  
Cement Pastes ◽  
Slump Test ◽  
Testing Procedures ◽  
Transportation Sector ◽  
Printing Ink

Three-dimensional (3D) printing has been used in various fields to tackle applications difficult for conventional manufacturing. To realize the full potential of this technology in the transportation sector, it is imperative to identify suitable tests and mixtures for printing “inks” made of mortar. In this study, several conventional and non-conventional tests on mortars and cement pastes were conducted. This work highlights the correlation between the results of slump test and the deformation test that indicates the comportment of the mixture under a stack of printed layers. Moreover, a strong connection between yield stress and mini-slump is observed, demonstrating a simplification of the testing procedure, and a link between the mortar and the cement paste is developed. In the printing ink design phase, this association enables the prediction of flowability. The yield stress and the final radius of the mini-slump tests were very well correlated for the admixture tested. The use of the mini-slump test simplifies the testing procedure and allows for quicker formulations of admixtures in the printing ink.

Extensive application of TMCP steel plates to ship hulls: 40 kgf/mm2 class high yield stress steel

1988 ◽  
Vol 1 (3) ◽  
pp. 219-243 ◽  
Author(s):  
Susumu Machida ◽  
Hiroshige Kitada ◽  
Hiroshi Yajima ◽  
Akinobu Kawamura
Keyword(s):  
Yield Stress ◽  
Steel Plates ◽  
High Yield ◽  
Ship Hulls ◽  
High Yield Stress

Removable equipment designed to transport timber: new engineering solutions and application of high-yield-stress steel

2020 ◽  
Vol 17 (1) ◽  
pp. 117-128
Author(s):  
N. A. Tanicheva ◽  
◽  
I. V. Fedorov ◽  
I. O. Filippova ◽  
◽  
...  
Keyword(s):  
Yield Stress ◽  
High Yield ◽  
High Yield Stress

CORRESPONDENCE. HIGH-YIELD-STRESS STEEL AS COLUMN AND BEAM REINFORCEMENT.

1944 ◽  
Vol 22 (8) ◽  
pp. 417-424
Author(s):  
C E REYNOLDS ◽  
C V BLUMFIELD ◽  
J CUEREL ◽  
K HAJNAL KONYI
Keyword(s):  
Yield Stress ◽  
High Yield ◽  
High Yield Stress

High Yield Stress Associated with Capillary Attraction between Alumina Surfaces in the Presence of Low Molecular Weight Dicarboxylic Acids

Langmuir ◽  
2010 ◽  
Vol 26 (5) ◽  
pp. 3067-3076 ◽  
Author(s):  
E-Jen Teh ◽  
Yee-Kwong Leong ◽  
Yinong Liu ◽  
Vincent S. J. Craig ◽  
Rick B. Walsh ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Yield Stress ◽  
Dicarboxylic Acids ◽  
High Yield ◽  
Low Molecular Weight ◽  
High Yield Stress ◽  
Capillary Attraction

TIO2 BASED ELECTRORHEOLOGICAL FLUID WITH HIGH YIELD STRESS

2005 ◽  
Vol 19 (07n09) ◽  
pp. 1104-1109 ◽  
Author(s):  
RONG SHEN ◽  
XUEZHAO WANG ◽  
WEIJIA WEN ◽  
KUNQUAN LU
Keyword(s):  
Yield Stress ◽  
Chemical Method ◽  
Electrorheological Fluid ◽  
High Yield ◽  
Oxide Nanoparticles ◽  
Wet Chemical Method ◽  
Titanium Oxide Nanoparticles ◽  
High Yield Stress ◽  
Wet Chemical ◽  
Er Fluids

We have fabricated several TiO 2 based ER fluids with doping and without designed doping, which exhibit the high yield stress up to more than 100kPa. The titanium oxide nanoparticles were synthesized by using wet chemical method. The ER effect of those materials is dominated by the special additives, such as amide or its ramification, as well as the remained molecules or ions in the sample preparation. It is found that the yield stress is also strongly dependent on the viscosity of the oil. The prepared ER fluids possess other attractive characters, for instance the current density is low and against sedimentation.

scholarly journals Strong Electrorheological Performance of Smart Fluids Based on TiO2 Particles at Relatively Low Electric Field

2021 ◽  
Vol 8 ◽  
Author(s):  
Yuchuan Cheng ◽  
Zihui Zhao ◽  
Hui Wang ◽  
Letian Hua ◽  
Aihua Sun ◽  
...  
Keyword(s):  
Electric Field ◽  
Yield Stress ◽  
Sol Gel ◽  
Interfacial Polarization ◽  
High Yield ◽  
Characteristic Structure ◽  
High Yield Stress ◽  
Large Yield ◽  
Er Fluids ◽  
Er Fluid

Electrorheological (ER) fluids are a type of smart material with adjustable rheological properties. Generally, the high yield stress (>100 kPa) requires high electric field strength (>4 kV/mm). Herein, the TiO2 nanoparticles were synthesized via the sol–gel method. Interestingly, the ER fluid-based TiO2 nanoparticles give superior high yield stress of 144.0 kPa at only 2.5 kV/mm. By exploring the characteristic structure and dielectric property of TiO2 nanoparticles and ER fluid, the surface polar molecules on samples were assumed to play a crucial role for their giant electrorheological effect, while interfacial polarization was assumed to be dominated and induces large yield stress at the low electric field, which gives the advantage in low power consumption, sufficient shear stress, low leaking current, and security.

Sign in / Sign up

Export Citation Format

Share Document