IKT – Institute for Underground Infrastructure

Down Under: What are the performance limits of CIPP liners?

Posted 22. September 2025

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Last week, the interim results of our international LinKa – Liner for Sewers research project were presented at the headquarters of the Water Services Association of Australia (WSAA) in Melbourne. The event brought together project partners from Australia and New Zealand in a hybrid workshop setting to discuss first findings and exchange expertise. Many Questions were asked, many answers were given.

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What Goes Back Into the Sewer Trench? – Flowable Backfill Materials Put to the Test

Posted 14. July 2025

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Settlement damage, uneven bedding, and poor re-excavation capability – these are common issues on sewer construction sites. Often, the cause lies in the backfill. Temporarily Flowable Self-Compacting Backfill (TFSB) materials promise better performance – but which ones actually deliver? We tested five different TFSB products in full-scale sewer trench simulations. The aim: to evaluate how these materials perform under realistic construction conditions.

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After six years: IKT researchers dig up their test stand for tree roots

Posted 05. September 2024

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How to keep roots away from sewage pipes? IKT investigates protection systems in a long-term project. Researchers want to find out which protective measures are suitable. They have now dug up their worldwide unique in-situ test rig. The initial results are surprising.

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