Sika® Ebonex®

12 months

Store properly in original unopened, sealed and undamaged packaging in dry and cool conditions.

• Sika® Ebonex® Grout: Grout formulated for Sika® Ebonex Anodes
• Sika® Ebonex® Titanium Wire pack: Titanium feeder wire 40 m x 1.5 mm dia
• Sika® Ebonex® Titanium Crimps: 80 per pack
• Sika® Ebonex® Venting pack: 20m PVC tube plus 40 connecting T-Pieces
• Sika® Crimping Tool: Tool for crimping titanium crimps

Design Criteria

Sika® Ebonex® is a discrete cathodic protection system providing long term durability to both new and existing structures under highly aggressive conditions. In line with other cathodic protection systems Sika® Ebonex® discrete anode systems should be designed by corrosion specialists and installed by knowledgeable and experienced contractors.

Level of Protection

Sika® Ebonex® works by distributing sufficient electrical current to overcome ongoing corrosion in the structure. Sika® Ebonex® anodes are connected to an external DC power supply, which provides the electrical current that mitigates corrosion activity. The anodes are connected to the positive terminal.
According to industry standards, an ICCP system is considered to be providing cathodic protection when the steel is sufficiently polarized to result in a 100mV depolarisation.

Preparation

Sika® Ebonex® discrete anodes are installed in pre-drilled holes 4 to 8 mm larger than the nominal anode diameter and typically no further than 600 mm apart.
The holes and Sika® Ebonex® discrete anodes should be located to minimize their proximity to the steel reinforcement in order to provide an even current distribution to the steel within the local vicinity.
Cut a slot of minimum 10 mm depth and 8 mm width into the concrete or mortar joint between the holes. This cut will accommodate the titanium feeder wire interconnecting the Sika® Ebonex® anodes, and the gas-ventilation tubing.
A 3 mm cut can be used if the venting pipes are not interconnected. Prior to application the holes and cuts should be blown or vacuum cleaned of all debris and pre-soaked with water.

Sika® Ebofix Grout:
Sika® Ebofix Grout should be mixed with a slow speed drill (400-500 rpm) and paddle mixer.
Place between 3.0-4.0 litres of potable water into a suitable mixing container, add one full 10 kg bag of Sika® Ebofix Grout and mix for three minutes until fully homogeneous.

Application Method

• Standing water should be removed from the drilled anode hole and the Sika® Ebofix grout placed to the rear of the hole to avoid air entrapment, ensuring sufficient grout is placed to cover the entire length of the active Sika® Ebonex® discrete anode once installed. The thixotropic nature of Sika® grout will prevent significant flow from vertical and overhead holes.
• Wet each Sika® Ebonex® anode with clean water, but do not immerse for more than 10 seconds, before gently inserting into the hole. Ensure the vent pipe is unobstructed and that sufficient tail wire remains exposed to enable connection with the feeder wire.
• Place the Sika® Ebonex® grout within 30 minutes of mixing to gain benefit of the expansion system and allow to cure for a minimum of 24 hours, without physical disturbance. When cured, the open end of the gas vent network can be directed to a well-ventilated location.
• Connect strings of Sika® Ebonex® discrete anodes together as recommended by the CP design engineer using coated or non-coated titanium feeder wire and electrical connectors or titanium crimp connectors.
• All wire jointing requires the use of titanium metal crimps, secured using an appropriate crimping tool.
• After connections have been made continuity should be tested with a resistance meter. Any reading found to have a resistance greater than 1 ohm requires recrimping the connection.
• When the integrity of the connection is established the tail of each Sika® Ebonex® discrete anode can be gently bent, thus settling the wire into the saw cut groove.

• The cut is filled with Sika® Ebofix grout or a Sika® R4 or R3 cementitious mortar, and left undisturbed for a minimum of 4 days before connecting to thepower system.