In keeping with the climate accord of clean energy, the production of geopolymer cement has an 80 percent smaller carbon footprint then a standard OPC. In general, geopolymer cement (binders) are stronger bond well to most materials have minimal expansion or contraction are formable resistant to salts, acids, and alkalis and are fireproof and waterproof. This geopolymer binder can have as little as 2 percent calcium, producing a saltwater-resistant material. One of the most important new cement components is a geopolymer binder made up of four inexpensive and widely available ingredients: Class-F fly ash, fresh water, water-glass (sodium silicate), and lye (sodium hydroxide).
Sulphur compounds in seawater directly react with the large amounts of calcium (approximately 79 percent) in the OPC binder, essentially “rotting” the binder in the concrete, causing rapid failure. However, in the offshore wind industry, the concrete made from OPC (the binder) and coated steel rebar are not durable enough in this corrosive atmosphere. Ordinary Portland Cement (OPC) is the most widely produced man-made material on Earth. Construction MaterialsĬoncrete and rebar are extremely well understood materials backed by a thoroughly developed industry. A telescopic deployment system for the DDWTG, a novel design for a customized deployment vessel, and a round-the-clock 24/7 construction schedule result in a build-out of one complete spar buoy in just 15 days and its deployment in two days. This new SB will be the first to have a double wall hull and use innovative new concrete materials in a design mix that will ensure a minimum 100-year life in any sea state, providing a foundation substructure good for three generations of DDWTG. The key is a new large-scale spar buoy (SB) structural design, which is scalable and allows for only one construction formwork design to support and produce all the 10-MW to 20-MW floating foundation requirements. A new innovative floating foundation system with a unique deployment method will substantially reduce the levelized cost of energy of the DDWTG. Developers of clean energy are ready to deploy large, efficient 10-MW to 20-MW direct drive wind turbine generators (DDWTG) in far offshore, deep-water wind farms.
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