Hierarchy of pores and mechanical behavior of wet silica gels

1990 ◽  
Vol 125 (3) ◽  
pp. 244-249 ◽  
Author(s):  
J. Dumas ◽  
J.F. Quinson ◽  
J. Serughetti
Keyword(s):  
Mechanical Behavior ◽  
Silica Gels

scholarly journals Mechanical behavior of asphalt mixtures containing silica gels as warm additives

2018 ◽  
Vol 51 (4) ◽  
Author(s):  
Elsa Sanchez-Alonso ◽  
Angel Vega-Zamanillo ◽  
Miguel Angel Calzada-Perez ◽  
Daniel Castro-Fresno
Keyword(s):  
Mechanical Behavior ◽  
Asphalt Mixtures ◽  
Silica Gels ◽  
Warm Additives

Influence of Formation Parameters on the Mechanical Properties of Wet Gels

1986 ◽  
Vol 88 ◽  
Author(s):  
S. A. Pardenek ◽  
J. W. Fleming ◽  
L. C. Klein
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Sol Gel ◽  
Silica Gels ◽  
Ambient Conditions ◽  
Relaxation Measurements ◽  
Beam Bending ◽  
Gel Composition ◽  
Processing Steps ◽  
Made In

ABSTRACTThe mechanical behavior of wet silica gels formed by various sol-gel processes has been studied. Samples were analyzed with a beam-bending apparatus specifically designed for accurate measurements of very low strength solids. Breaking strength, viscosity and relaxation measurements were made on gelled bodies. Specimens were studied in an undried gel state, molded in shapes suitable for the particular experiments. Tests were made in several ambient conditions including immersion in a liquid bath. The mechanical properties of gels are dependent upon the gel composition, gel age and other formation parameters such as pH, temperature and pressure. An understanding of these properties is particularly important in determining the nature of subsequent processing steps. Models for the structures of the various gels are proposed which explain variation in mechanical behavior.

Relation between microstructure and mechanical behavior of concentrated silica gels

2004 ◽  
Vol 273 (2) ◽  
pp. 455-462 ◽  
Author(s):  
Hans M Wyss ◽  
Elena Tervoort ◽  
Lorenz P Meier ◽  
Martin Müller ◽  
Ludwig J Gauckler
Keyword(s):  
Mechanical Behavior ◽  
Silica Gels

Application of TEM to Deformation, Wear, and Fracture of Ceramics

1974 ◽  
Vol 32 ◽  
pp. 472-473
Author(s):  
B. J. Hockey
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Brittle Materials ◽  
High Temperature Strength ◽  
Wide Range ◽  
Corrosive Environments ◽  
Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

Small angle scattering study of silica gels and zeolites

1993 ◽  
Vol 03 (C8) ◽  
pp. C8-393-C8-396
Author(s):  
T. P.M. BEELEN ◽  
W. H. DOKTER ◽  
H. F. VAN GARDEREN ◽  
R. A. VAN SANTEN ◽  
E. PANTOS
Keyword(s):  
Small Angle ◽  
Small Angle Scattering ◽  
Silica Gels ◽  
Angle Scattering ◽  
Scattering Study

The influence of the addition of ground olive stone on the thermo-mechanical behavior of compressed earth blocks

2020 ◽  
Vol 108 (2) ◽  
pp. 203
Author(s):  
Samia Djadouf ◽  
Nasser Chelouah ◽  
Abdelkader Tahakourt
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Mechanical Behavior ◽  
Agricultural Waste ◽  
Hydraulic Press ◽  
Dry Density ◽  
Olive Stone ◽  
Compressed Earth Blocks ◽  
Clay Matrix ◽  
Earth Blocks

Sustainable development and environmental challenges incite to valorize local materials such as agricultural waste. In this context, a new ecological compressed earth blocks (CEBS) with addition of ground olive stone (GOS) was proposed. The GOS is added as partial clay replacement in different proportions. The main objective of this paper is to study the effect of GOS levels on the thermal properties and mechanical behavior of CEB. We proceeded to determining the optimal water content and equivalent wet density by compaction using a hydraulic press, at a pressure of 10 MPa. The maximum compressive strength is reached at 15% of the GOS. This percentage increases the mechanical properties by 19.66%, and decreases the thermal conductivity by 37.63%. These results are due to the optimal water responsible for the consolidation and compactness of the clay matrix. The substitution up to 30% of GOS shows a decrease of compressive strength and thermal conductivity by about 38.38% and 50.64% respectively. The decrease in dry density and thermal conductivity is related to the content of GOS, which is composed of organic and porous fibers. The GOS seems promising for improving the thermo-mechanical characteristics of CEB and which can also be used as reinforcement in CEBS.

Sign in / Sign up

Export Citation Format

Share Document