Limit grout seepage
Helps prevent unnecessary grout migration into the surrounding ground.
Installation.Rock-anchor application environment
Product overview
Grout Sock Product overview.
Grout Sock Product is a tubular fabric to aid grout retention in a range of widths and is available in single and double thickness. Rolls are available in approximate 50 metres in length with an allowance for one join.
- Available in single and double thickness
- Widths from Grippa 7cm to Grippa 12cm
- Rolls available in approximate 50 metres in length
- Allowance for one join
Grout Sock Product sizes, construction and technical information
Grout Sock Product information on this page brings together the confirmed fabric configurations, available sizes, approximate roll length and supplied laboratory test summary for GROUTGRIPPA GROUTSOCK FABRIC. The product is a tubular fabric designed to aid grout retention and is available in single and double thickness. It is intended for use in suitable civil engineering applications involving rock anchors, including tunnelling and ground stabilisation. The information below is presented so customers can review the product data in one place before making an enquiry.
Available fabric configurations
The Grout Sock Product is available as Single Knit and Double Knit fabric. Both configurations are offered in the confirmed approximate lay-flat widths of Grippa 7cm, Grippa 8cm, Grippa 9cm, Grippa 10cm and Grippa 12cm. Rolls are available in approximately 50 metre lengths with an allowance for one join. These dimensions are the sizes supplied in the technical information and should be considered alongside the project requirements established by the customer, designer or contractor.
Purpose of the tubular fabric
The sleeve is used to assist grout retention around a rock-anchor installation. Where ground conditions could allow grout to migrate away from the intended zone, the fabric can help keep more grout close to the required area. This can reduce unnecessary grout seepage and support more efficient use of raw materials. The product is not presented as a substitute for engineering design or site-specific assessment. Its function is focused on controlled grouting and the retention characteristics of the fabric around the relevant installation.
Laboratory test information
The Grout Sock Product technical summary includes laboratory-based testing for Single Fabric (S) and Double Fabric (D), using 12cm lay-flat samples. Moisture testing used the GATS Gravimetric Absorbency Testing System with 600 second saturation and a 1396 Pa load. Air permeability was tested to ASTM D737. Thickness under load used a Zwick/Roell 2.5 kN machine in compression mode. Tensile properties were tested to DIN EN ISO 13934-2 using the grab method at 50 mm/min, while elastic recovery and force decay were tested to DIN EN 14704-1.
Moisture absorption and air permeability
The supplied test results show different characteristics for the two configurations. Single fabric recorded greater mass-normalised absorption efficiency, while double fabric recorded higher absolute moisture absorption. The technical conclusion states that single fabric is more efficient at absorbing liquid with minimal material, whereas double fabric is better at holding a larger volume of liquid. Air-permeability testing recorded higher permeability for the single fabric and a reduction of approximately 57 percent for double fabric compared with single. The supplied conclusion notes that single fabric will generally support faster curing, while double fabric promotes slower moisture release.
Thickness, tensile properties and recovery
The Grout Sock Product summary also reports thickness under applied pressures of 2 kPa, 20 kPa and 80 kPa. The supplied conclusion indicates that single fabric may be beneficial where a low-profile installation is required, while double fabric retains more bulk under load and provides cushioning and load distribution. Tensile testing shows higher stated strength values for the double fabric, while the single fabric demonstrates characteristics associated with conformity to irregular shapes and movement. Elastic-recovery testing recorded no permanent elongation in the tested samples within the stated strain limits.
Understanding the technical performance summary
The overall technical summary states that double fabric provides higher absolute moisture absorption and tensile strength, while single fabric provides higher mass-normalised absorption efficiency. Double fabric also improves thickness retention and load-bearing capacity in the reported tests. Both configurations exhibited complete elastic recovery within the tested strain limits. These results are useful for comparing the tested material characteristics, but they do not determine suitability for a specific site on their own.
Project suitability and enquiries
Please note that the published information is the result of laboratory-based testing and the conclusions are deduced from those tests. Users must satisfy themselves regarding the suitability of the Grout Sock Product for each individual project. Site conditions, anchor design, grout design, installation method and other engineering requirements should be assessed by appropriately qualified project professionals. If you need confirmed sizes, lengths, product availability or a copy of the technical information, use the Contact page to reach Grout Grippa, a division of Easigrip Ltd. Providing the required size, quantity and delivery location will help the team respond with the relevant product information.