We were engaged by Taisei to provide expert consultancy to study defects on the concrete structure and proposed remedial actions for the Paiton Power Project in East Java, Indonesia. The Paiton Power Station is a 4000 megawatt capacity thermal power station located around 35 km to the east of the town of Probolinggo in East Java in Indonesia. The work involved a specialist materials investigation and assessment of potential defects at the construction joints of a reinforced concrete outfall structure during the construction of the Paiton Private Power Project Phase 1.
Visual defects were observed on the concrete surface, and the extent and significance of these defects throughout the Inlet and Discharge canals was unknown. Immediate action was required to resolve this issue so that a repair programme could continue with confidence in respect of the concrete durability. The scope of work included a site visit to visually scan the structures, carry out extensive photographic records of the construction joints, review concrete core samples obtained randomly on defective and defect free areas, review suitable options for repairs, review investigation work already completed, assess the present and future condition of the structures, and advise on suitable repair action taking into account the owner’s professional engineers’ recommendations. We issued the findings in a report, including meeting the owner’s Professional Engineer to discuss and agree on an acceptable remedial works approach and monitoring programme. We represented the contractor at meetings held with the owner to discuss and agree on the approach and handover. We then supervised the remedial works and assisted with the handover of the structure to the client.