Masonry Magazine April 1987 Page. 46
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FACT SHEET ON GEOTECHNICAL
ENGINEERING MATERIALS
A number of "geo" terms have evolved recently in
the geotechnical engineering industry in reference
to products used in highway construction, soil re-
inforcement and stabilization, drainage, and in the
building industry. Geotechnical engineering is pri-
marily concerned with solving ground and soil prob-
lems with a variety of solutions.
The following definitions categorize the primary
"geo" terms and their basic applications:
Geomatrix: A three-dimensional, lightweight com-
posite, usually made of polymers and often com-
bined with geotextiles (woven or non-woven fab-
rics). Geomatrixes usually have a significant amount
of open space within the matrix that allows the ma-
terial to channel water, provide an air pocket, or to
be filled with other materials. Geomatrixes are used
in a wide variety of applications including soil en-
gineering and reinforcement, erosion control, and
subsurface drainage.
Geotextile: A term coined by internationally known
geotechnical fabrics expert Dr. Jean-Pierre Giroud that
refers to a wide variety of permeable fiber textile
products used in engineering applications. The term
is a combination of two Latin words-geo, meaning
"soil" and textilis, meaning "woven." The term geo-
textiles now encompasses the entire range of fabrics,
from woven to non-woven, which are also referred
to as "filter fabrics." Prior to settling on the term
geotextiles, they were variously referred to as civil
engineering fabrics, engineered fabrics and geofa-
brics. Applications include paving underlayment,
sedimentation containment, soil separation, erosion
management, and silt fencing, among others.
Geomembranes: Impermeable membrane liners and
barriers used in civil engineering for geotechnical
projects. They can either be prefabricated and trans-
ported to the construction site or sprayed onto a sur-
face. Some of the other terms for geomembranes are
synthetic membranes, polymeric membranes, flexi-
ble membrane liners, plastic liners, and impervious
sheets. Geomembranes are usually made from syn-
thetic polymers, extruded to form a film.
1988 MCAA Conference City
Nashville, Tennessee
46 MASONRY-MARCH/APRIL, 1987
AA Wire Products Co. 37
Addiment 38
Ahrens Chimney Techniques, Inc. 33
Anchor Manufacturing Co. 42
Automatic Devices, Inc. (Ryd-Up) 18
Fred Beyer & Co. 42
Bil-Jax, Inc. 41
Dur-O-Wal, Inc.. 25
Fibermesh, Inc. 21
Gemstar 26
Glashaus, Inc. (Weck Glass Block) 36
Goldblatt Tool Co. 34
Gradall Company 48
Hydrochemical Techniques, Inc. 39
JCB, Inc. 2
Kem-O-Kleen, Inc. 43
Keystone Steel & Wire Corp. 28
Koehring Construction Equipment 15
LowBidder, Inc. 43
Master Builders. 17
Masonry & Concrete Consultants, Inc. 24
Mayco Pump Corp. 29
MCAA Industry Tour 30
National Supaflu Systems 43
Non Stop Scaffolding 47
Pettibone Corp. 5
Robert H. Peterson Co. 39
Planksaver Lumber Co. 46
Sellick Equipment Limited 10
Sterling Handling Equipment 28
Stucco Stone Products, Inc.. 6
Thoro Systems Products 4
U.S. Discount 22