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Pan-United Completes Mass Concrete Pour for Casting Raft Foundation of Singapore’s Tallest Building

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Pan-United Concrete successfully concluded a mass pour of 10,250 cubic metres of concrete for casting the 5-metre raft foundation of The Skywaters at 8 Shenton Way in January 2025. The 63-storey mixed-use development towers 305 metres high and sits on a site spanning 10,984 square metres or 118,229 square feet. Upon completion in 2028, The Skywaters will be Singapore’s tallest building.

Collaborating closely with the project’s main contractor, China Harbour Engineering Company Ltd (Singapore branch), the mass pour was executed non-stop for 35 hours, with one truckload of concrete delivered to the site every two minutes. The smooth delivery was made possible by our technology arm, AiR Digital. Leveraging its AI-enabled optimisation solution, the AiR Digital system effectively managed the complex logistics of the mass pour. For instance, its fleet optimisation and auto-replenishment of raw materials ensured that trucks shuttled between the plant and project site with zero disruptions. In addition, the mixer trucks could queue seamlessly to deliver concrete without delays.

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The Skywaters is Singapore’s first project to use the highly durable Grade 105 PanU SuperHigh-Strength® Concrete, which reduces the amount of concrete and reinforcements required for the raft foundation. To reduce the embodied emissions of the project, The Skywaters is also being built with PanU CMC+, which permanently traps industrial waste carbon dioxide in the concrete, effectively making the building a carbon sink. Additionally, PanU CoolTM concrete was utilised for its industry-leading temperature control and very high flowability.

Mr Lim Han Kwong, Chief Operating Officer of China Harbour Engineering Company Ltd (Singapore Branch), said, “The mass pour would not have been possible without the strong leadership from China Harbour Engineering Company and the seamless collaboration among all stakeholders, including the unwavering support from the entire Pan-United team. This project showcased Pan-United’s exceptional coordination skills and their commitment to delivering on their promises.”

Mr Ken Loh, Chief Executive Officer of Pan-United, said: “We take great pride in our involvement in this landmark project and are grateful for the confidence and trust that China Harbour Engineering Company has in Pan-United. The successful completion of the casting was very much a combined effort between China Harbour Engineering Company and Pan-United. Our teams collaborated closely to carefully plan and execute the pour round-the-clock. We are glad that Pan-United’s years of concrete innovation and use of advanced technology have proven useful in meeting the challenge of setting new records in landmark projects.”

The Skywaters, positioned at the intersection of the Central Business District, Marina Bay and the future Greater Southern Waterfront, is being developed by a consortium led by Perennial Holdings. The development features luxury residential units, retail space, offices and a hotel. It was designed by Skidmore, Owings & Merrill, whose portfolio includes the Burj Khalifa in Dubai, One World Trade Center in New York and Jin Mao Tower in Shanghai.

Pan-United Achieves Singapore’s Largest Two Continuous Concrete Pours Within a Month

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Pan-United Corporation Ltd has achieved Singapore’s largest two continuous ready-mix concrete pours in casting the raft foundation for a development project in the Labrador area. The Group’s subsidiary, Pan-United Concrete, set a national record when it poured 18,916 m3 for 57 hours non-stop from 31 October to 2 November 2020.

This first pour was followed by a second pour of 18,342 m3 of concrete in a shorter time of 42 hours non-stop, from 27 to 29 November 2020, to complete the raft foundation. The mixer truck convoys delivered one truckload of concrete non-stop every 60seconds.The total concrete volume of the two pours, at 37,258 m3, is equivalent to filling 14 Olympic-sized swimming pools. The previous record of 18,000 m3 was in March 2015 for the Marina One raft foundation.

Ready-mix concrete is produced just in time and typically has a brief two-hour workable lifespan. Pan-United designed a special concrete that remained workable for six hours to ensure the layers bonded integrally to form a solid raft. The complex logistics planning for the production, delivery and casting of the raft foundation stretched over several months in close collaboration with Hyundai Engineering & Construction(“Hyundai”), the main contractor of the development.

Mr Ken Loh, Chief Operating Officer of Pan-United said, “We are thankful to Hyundai for taking all the measures necessary to ensure safe distancing and to greatly reduce any health risks to the teams handling the massive pours.Pan-United also used our contactless processes such as e-delivery orders, e-concrete sampling, e-sign-offs, and our customer portal to minimise physical interaction at the worksite. Both mass pours went very smoothly, thanks to the excellent co-operation with Hyundai, and the tremendous team effort of all parties involved. We had full confidence of success in executing this feat, supported by our concrete innovation specialists and with the advanced logistics managed through our digital optimisation platform called AiR (Artificial Intelligence for Ready-Mix Concrete). AiR optimises our supply chain, managing the efficiency of our batching plants and ensuring a seamless relay of trucks delivering the concrete. Pan-United will continue to innovate concrete and logistics solutions that can address any complex challenge in building smart cities like Singapore.”

Mr Chan Wai Mun, Operations Director of Pan-United Concrete added, “Technology-enabled precision was absolutely crucial in both mass pours to ensure zero disruptions to concrete placement. The continuous supply allows the concrete raft foundation to set uniformly within the required temperature properties.”

Highlighting the sustainable aspects of the massive operation, Mr Chan explained: “A sustainable Grade 55 temperature-controlled flowing concrete (PanU Cool) was chosen to improve the structural integrity and durability of the raft foundation. Chiller systems developed in-house were used to maintain the low heat of this special flowing concrete so as to prevent cracking during the setting of the huge raft.”

“Our custom concrete ‘recipe’ for PanU Cool comprised sustainable raw materials,such as ground granulated blast furnace slag, a by-product of steel production. We also used silica fume, a by-product of silicon wafer production. Stringent durability requirements were designed to ensure the concrete met high performance criteria such as strength and water-tightness. Virtual quality testing was conducted remotely using e-sampling to ensure safe distancing,” emphasised Mr Chan.