ASTM D6072-96

STD.ASTH Db072-ENGL L=l=iL - lJ75=l5Lll 0bClll723 T=llJ H
Designation: D 6072 - 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr. West Conshohocken. PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
If not listed in the current comb&d index, will appear in the next edition.
Standard Guide for
Installation of Geosynthetic Clay Liners’
This standard is issued under the fixed designation D 6072; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
supemcript epsilon (c) indicates an editorial change since the last revision or reapproval.
1. scope a manner that does not impact their physical, mechanical,
and hydraulic properties.
1.1 This guide provides directions for the installation of
4.2 This guide identifies the proper installation proce-
geosynthetic clay liners (GCLs) under field conditions typi-
dures and equipment for use by GCL designers, inspectors,
cally present in environment lining applications.
and installers.
1.2 This guide contains general installation guidelines. It
is not intended to replace project-specific installation re-
5. Procedure
quirements as found in the contract drawings or specifica-
tions. In the event of a conflict, the requirements of the 5.1 The methods and equipment used for placement of
project specifications will supersede the requirements of this the GCL can vary, but the primary objective of the process is
guide. to minimize the potential for GCL damage. The placement
1.3 This guide does not purport to establish specific
methods and equipment should be evaluated appropriately
procedures for all climatic, geographical, hydraulic, or topo-
within this context.
graphical conditions that may exist at a site. Appropriate
5.2 Subgrade Preparation:
installation procedures under atypical field conditions
5.2.1 For projects where the GCL is to be placed over an
should be modified as necessary to maintain the integrity of
earthen subgrade, the subgrade surface must be prepared and
the GCL and adjacent lining system components.
approved prior to installation in accordance either with
1.4 Different GCLs have different materials of construc-
project specifications or with this guide. The surface should
tion with different physical properties. The procedures con-
be firm and unyielding, with no abrupt elevation changes,
tained herein, therefore, may not be universally applicable to
voids and cracks, ice, or standing water.
all GCLs under all field conditions.
5.2.2 The subgrade surface should be smooth and free of
1.5 This standard does not purport to address all of the vegetation, sharp-edged rocks, stones, sticks, construction
safety concerns, if any, associated with its use. It is the
debris, and other foreign matter that could contact the GCL.
responsibility of the user of this standard to establish appro-
The subgrade surface shall be compacted in accordance with
priate safety and health practices and determine the applica- the project specifications. At a minimum, the subgrade
bility of regulatory limitations prior to use. should be rolled with a smooth-drum compactor of sufficient
weight to remove any wheel ruts, footprints, or other abrupt
grade changes. Furthermore, all protrusions extending more
2. Referenced Documents
than 12 mm from the subgrade surface shall either be
2.1 ASTM Standards:
removed, crushed, or pushed into the surface with a smooth-
D 653 Terminology Relating to Soil, Rock, and Contained
drum compactor.
Fluids2
NOTE l-The CCL may be installed on a frozen subgrade, but the
D 4439 Terminology for Geosynthetic$
subgrade soil in the unfrozen state should meet the requirements stated
in 5.2.2.
3. Terminology
5.3 GCL Placement:
3.1 Definitions-For definitions of other geosynthetic
5.3.1 All handling of the GCL at the job site should be
terms used in this guide, refer to Terminology D 4439. For
conducted in accordance with the GCL manufacturer’s
definitions of soil terms, refer to Terminology D 653.
recommendations.
3.2 Description of Term Specific to This Standard:
5.3.2 The GCL rolls are to be delivered to the working
3.2.1 geosynthetic clay liner (CCL), n-a manufactured
area of the site in their original packaging. Immediately prior
hydraulic barrier consisting of clay bonded to a layer or
to deployment, the packaging shall be carefully removed
layers of geosynthetics.
without damaging the GCL.
NOTE 2-The orientation of the GCL (that is, which side faces up) is
4. Significance and Use
important and shall be in accordance with the engineer’s or supplier’s
4.1 For optimum performance, GCLs must be installed in
requirements.
5.3.3 No equipment that could damage the GCL shall be
allowed to travel directly on the GCL. Acceptable installa-
1 This guide is under the jurkdiction of ASTM C
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