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 Pipebursting Trenchless Replacement of Fracturable Pipe Pipebursting is rapidly becoming one of the leading "No Dig" technologies in the USA for the replacement of old and undersized sewers. BG plc, the pipebursting patent owner, is licensing operators and equipment suppliers throughout the USA on a non-exclusive basis. Pipebursting is a method by which fracturable pipes, such as concrete, clay, or cast iron pipes, can be replaced by plastic pipes of the same or larger size without using boring or open cut construction methods. During operation, a pipebursting machine is pulled through the old pipe, breaking the pipe into pieces, and pulling a new plastic pipe into place behind the machine. Pipebursting was developed by British Gas in the UK, and its advantages have proven attractive to municipalities and utilities in the USA for sewer installations. Contact: Jim Hopwood, Engineering Consultant |
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FiRP® Reinforced Glulam Technology FiRP ® Reinforced Glulam Technology includes methods to design and manufacture glued, laminated wood timbers reinforced with high-strength fiber reinforced plastics (FRP) for use in structural applications. The design method for FiRP Glulam timber is compression based, akin to the method used for reinforced concrete, and is a radical departure from the tensile based method for design of conventional glulam members. The patented FiRP Glulam Technology has many potential applications in residential, commercial, and infrastructure construction. It is especially well suited to structures such as bridges and domes wherein dead load is a large component of the total expected design load. In comparison to conventional glulam, FiRP Glulam presents substantial economies as less wood and lower grades are required when the FiRP Technology is used. FiRP Glulam's stiffness and strength properties are less variable, and therefore more reliable, than conventional glulam. Environmental impacts of the technology are also very positive. Wood is an environmentally friendly, sustainable resource, the plastic matrix reinforcement components can be made from recycled plastic, and there is reduced pollution and energy usage when used instead of metals and concrete. Contact: Dan A. Tingley, Executive Director Or: Robert Leichti, Associate Professor |
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National Center for Construction
Education and Research Besides producing standardized training materials, the Center conducts certification programs for master trainers, craft instructors and trainers and creates instruction centers to ensure the highest quality level of craft instruction. A national registry provides workers with transcripts and maintains permanent training records. Contact:Daniel J. Bennet |
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Sika® Rapid-1, Hardening Accelerator Concrete Admixture Sika® Rapid-1 is a patented new hardening accelerator concrete admixture that allows the development of very early high strengths in concrete using common mix components. This hardening accelerator allows placement of fresh concrete without early stiffening, followed by a period of very rapid strength gain after initial set. Sika Rapid-1 is non-chloride (non-corrosive) and will not limit the long term strength gain of concrete that is often sacrificed when using set accelerators. The advantages and benefits amount to a placeable concrete for improved production with less manpower and very early high strengths achieved without performance tradeoffs. In addition to the benefits for ready mixed concrete, the hardening accelerator offers advantages to precast/prestressed concrete producers. Sika Rapid-1's interaction with the cement hardening process occurs during the hydration phase after initial set, and results in additional internal heat generation. This heat is used to reduce or eliminate the cost of steam curing, and/or shorten curing times. Highway contractors can place full-depth concrete that is ready for traffic or paving operations in under six hours. Contact: Todd C. Spindler, Marketing Manager - Concrete |
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