CDE’s technology guaranteed to maximize productivity through water recovery and washing of No.4 manufactured sand, improving the quality and quantity of production on the site through sustainable methods.
Eoin Heron, CDE Business Development Director, explained, “Hawaiian Cement already have a very effective CDE plant, but for us every project and every plant is unique. We wanted to build upon what was working for the company in Maui and establish a designated and comprehensive project team to work hand-in-hand with them to design, manufacture, install and commission a custom-built solution for this site.”
Sean added, “We didn’t want an off-the-shelf piece of machinery. It was important that we worked directly with the manufacturer and that they understood our aims. We had witnessed the success of our Maui division under President Jason Macy & Maui’s General Manager David Gomes, but we needed the advice and support in establishing this new system at our Oahu site and CDE have been there every step of the way.”
Partnership In Planning:
Sean explained, “CDE’s team of local experts took the time to truly understand our site, our feed and our needs, working with us to maximize the efficiency that would come out of our new plant and deliver a smarter, integrated solution. We worked together with a formidable, dedicated project team, consisting of Electrical Engineers, Process Engineers, Technical, Finance, Project managers and more. We had a point of contact for every step. The experience has exceeded both our expectations and their promise, extending right through to after-sales care. Being on an island, we appreciate this can be difficult but CDE go to lengths to mitigate the inconvenience, ensuring a smooth service.”
Haggerty additionally notes that the CDE staff were extremely receptive of the input from his team, especially around elements that would affect them in the day-to-day running of the plant such as housekeeping and preventative maintenance measures.
Heron says that after a thorough process, “A fully integrated plant was developed, based around the existing Evo-Wash™ wet processing plant and included an M4500™ modular wash plant and AggMax™ logwasher. Our modular machinery allowed for this integration and was identified as the most efficient system to achieve the company’s ambitions, with an AquaCycle™ thickener and AquaStore also included to recycle and store water.”
The plant is currently producing up to 345tph of aggregates used in Hawaiian Cement’s concrete products, comfortably meeting the monthly aggregate demand of 60,000 tons.
Water Management Masterclass
The efficiency of the plant is optimized using a wastewater treatment unit, the CDE AquaCycle™ thickener, which allows recycling of up to 90% of the water used via a system that settles the solids from the dirty water in a controlled environment and expels sludge into the nearby settling ponds. On an island, water is a tremendous cost and is not as readily available. This new system was ideal for Hawaiian Cement as it means taking less water from the island on which they reside; a huge environmental issue at present.
Customization and Future-Proofing
As well as customizing the plant to suit their business objectives, CDE also opted for a ‘marine specification finish’ due to the salty environment on the island. This ensures maximum life of the asset by way of galvanizing, Marine Spec paints and stainless steel bolts to name a few measures.
Heron added, “Global demand for construction sand is more than 15 billion tons per year. Our sustainable technology, producing washed and graded manufactured sand, has removed the dependency on finite natural sand resources which are becoming increasingly expensive. By utilizing normally low-value crusher fines for sand production we can extend the life of natural resources and add huge commercial value to our customers’ enterprises. That’s exactly what we’ve enabled for Hawaiian Cement.”
Aftercare With CDE CustomCare™
The process from order to completion was relatively swift given the scale of the task at hand, with the plant designed, manufactured, pre-wired and pre-tested at CDE’s assembly facilities. After delivery, installation and commissioning by the CDE engineers, members of the designated project team remained in Oahu for up to three weeks to ensure the plant was fully operational before leaving the island – exhibiting their commitment to dedicated support. Once the plant was running, the CDE CustomCare™ service took over to offer a world-class after-sales and support service.
Michael Dambra, CDE CustomCare Regional Service Engineer, keeps in regular contact with the team in Oahu after his visit during installation and commissioning. He explains, “Whether it’s questions about parts, tech advice or checking stock levels, we’ve ongoing communication with Sean and his team to ensure the smooth running of the plant.”
Sean Haggerty believes that CDE’s partnership approach provides a much-needed sense of assurance. “Living on an island and we know that the reality is you can’t get everything locally, but we have had a comprehensive and full-circle service with CDE. The project team went above and beyond, staying in Hawaii to ensure we were fully operational and happy with our new plant, and are always checking in. It’s comforting to know we have a dedicated team readily available should we need assistance.”
Eoin Heron explained, “Our CustomCare™ team provides a tailored after-sales service with engineering support for complete peace of mind. We have a dedicated point of contact for every customer who routinely calls by or makes a phone call to check in. Hawaiian Cement also benefits from a readily available stock of common parts in North America and a complete order history which enables shorter downtime, low shipping costs and boosts in productivity. CDE can support with monitoring and optimization reviews to help Sean & the team run the plant optimally – a game-changer that means we’re always on hand to support.”
At the Halawa Valley quarry, Hawaiian Cement is now producing:
- 3/4inch minus
- 3/8 chip
- No.4 manufactured sand
The new plant is capable of cleaning the B-grade surplus materials to a standard that means they can reduce their dependence on imported British Columbia sand (from 150,000 tons+ every year to 50,000 tons every 14 months), proving a significant financial saving for the company.
Sean explains, “By reducing our dependence on import sand, as well as boosting our product offering, CDE’s technology is a game-changer for Hawaiian Cement and is instantly feeding into our company’s bottom line. We were already well established, and the potential is there for more customer acquisition and to expand into new markets with new lines. It’s been extremely positive.”
Heron added, “We proactively work with customers to ensure optimization of their plant and ROI. Indeed, for this project, we had a very succinct ROI brief and Hawaiian Cement will be able to recoup that cost within a very short period of time. We hope the positive results seen so far for the company continue. Hawaiian Cement is more than a customer to us, Sean and the team are our partners, and we will continue to support them.”
With the plant fully operational and producing the new quality product, the Hawaiian Cement team is looking forward to not only supplying their existing customers and applications but exploring new markets and opportunities. At present, they are supplying ready-mix concrete to various government, private and commercial projects including the Honolulu Light Rail Project, high rises, and homeowners, as well as providing both engineered and non-engineered fill materials related to site work.
The new plant has opened up new opportunities and Hawaiian Cement will reap the benefits.