||Committee Proposes Uniform Testing for Composites Used in Critical
Marine and Civil Engineering Applications
A standard on ballot at ASTM International proposes a new Test
Method for Tensile Properties of Continuous Polymer Matrix Composite
Tendons and Rods.
Polymer-matrix composite tendons and rods are suitable for reinforcing
or prestressing concrete as well as recycled plastic members used
in both civil engineering and marine applications, said Abdul-Hamid
Zureick, professor of Structural Engineering, Mechanics and Materials
at the Georgia Institute of Technology, Atlanta. However there
is scarcity of information concerning not only their material
properties but also the test methods that need be adopted for
Researchers, manufacturers, government agencies and everyone
dealing with these materials conduct different test methods and
protocols, Zureick said. There is not a consistent basis for
testing and reporting test data for use by the engineering community.
Structural and material engineers working with Zureick and other
academicians in ASTM Committee D30 on Composite Materials, proposed the method to establish testing
uniformity. Thats the driving force, he said.
The composite tendons and bars reinforce concrete structures in
civil and marine applications. They have been used extensively
to reinforce recycled plastic members in marine-pilings. Inconsistent
test protocols and data reporting will delay the implementation
of these innovative products in all applications, Zureick explained.
There is a clear urgency to develop design properties based on
reliable and repeatable methods, he explained. If you are using
different tests it becomes extremely expensive on behalf of every
organization to generate the required data for the analysis and
design, based on adequate statistics. So we need to eliminate
that parameter completely.
While developing the test method, the group considered input from
designers, manufacturers, and agencies such as the U.S. National
Institute for Standards and Technology, U.S. Federal Highway Administration
(FHWA), and the State of Georgia Department of Transportation.
What were trying to do is bring all different parties into just
one game, basically, Zureick said.
The test method is based on over 10 years of research sponsored
by the FHWA, and the National Science Foundation supporting new
technologies for infrastructure applications.
Direct technical inquiries or comments to Abdul-Hamid Zureick, School of Civil Engineering, Georgia Technical Institute, Atlanta
(phone: 404/894-2294). Committee D30 meets Oct. 23-25 at Purdue
University, West Lafayette, Ind., in conjunction with the American
Society of Composites. For meeting or membership details, contact
James Olshefsky, manager, ASTM Technical Committees (phone: 610/832-9714). //
Copyright 2002, ASTM