Applications

plus Airport Runway Repairs

plus BluCem HE80AG

plus Bolt Grouting

plus Concrete Protection

plus Concrete Repair

plus Crack Injection

plus Epoxy Coatings

plus Ground Support

plus Grouting

plus High Early Strength Grouting

minus HV Cable Grouting

plus Settlement Prevention

plus Sewer Repair

plus Soft Eye Reinforcement

plus Soil and Rock Grouting

plus Strata Support

plus Structural Repairs

plus Tunnel Support

plus Underwater Grouting

plus Wharf Repairs

HV Cable Grouting

Across both Australia and New Zealand, infrastructure continues to develop at a considerable pace. Whether road, rail or anything in between, it’s extremely vital for civil engineering businesses to be using the correct product in the right method. This is certainly where the team at Bluey Technologies Pty Ltd becomes useful.

As a leading supplier of industry-standard grouting products across the civil engineering sector, Bluey Technologies is involved in countless projects across tunnels, roads construction, railways, ports and basements among others. Of course, one of our core values is matching our products and services to your application – with HV cable grouting no different.

HV cable grouting – the key details

With improving and expanding infrastructure more important than ever, high-voltage cables (HV) are becoming a more common fixture for engineers. Of course, design engineers can’t disrupt the existing infrastructure, so the cables are installed under roads and rail. In most cases, a jacking (envelope) pipe is used for this process in conjunction with cable conduits under the ground.

Engineers pull the HV cable (within the PVC conduits and envelope pipes) through the space.. When in service, HV cables create a lot of heat due to the passing current, so it is vital to ensure the heat is drawn away by the surrounding ground or otherwise designers must decrease the cable rating. Of course, having air around HV cables is not a good heat conductor either, meaning design engineers need an appropriate backfill solution to dissipate generated cable heat.

Cement grouts with low thermal resistivity (TR) are the logical backfill material but cement can develop excessive heat during hydration which can deform and deteriorate the PVC conduit pipes.

Why BluCem LH60?

BluCem LH60 was developed by Bluey Technologies, not only with a very low TR, but also low exothermic heat during the early curing process. These characteristics, along with having excellent pumpability, long pot life, very low drying shrinkage and self compaction, makes the product ideal for backfilling around HV cables.

Bluey previously supplied BluCem EA55 for this application but the product has been superseded by LH60 which now offers a number of additional benefits including improved pumpability and higher ultimate strength.

Bluey Technologies and HV cable grouting

As experts in the civil engineering industry, our team has the ability to support any project involving HV cables. At the beginning of the process, we can give advice around heat in the proposed envelope pipe and how this could impact product selection. This step can include analysis of the pipe dimensions and the overall heat hydration of the grout.

From this point, we can use our product calculator to work out the appropriate quantities before assisting with mixing, pumping and the placement of the grout. It is important to note that the Bluey Technologies team is there to provide support and technical advice – ensuring that every step of the project is completed to a high standard.

If you would like more information about HV cable grouting or the BluCem LH60 product, feel free to get in touch with us today. We will be more than happy to discuss the finer points of either and work with your team to find the right solution.

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