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An expansion joint is designed to allow deflection in the axial (compressive), lateral (shear), or angular (bending) deflections. Expansion joints can be non-metallic or metallic (often called bellows type). Non-metallic can be a single ply of rubberized material or a composite made of multiple layers of heat and erosion resistant flexible ...
Solar Roadways Incorporated is an American company based in Sandpoint, Idaho, aiming to develop solar-powered road panels to form a smart highway.Their proof-of-concept technology is a hexagonal road panel that has a glass driving surface with underlying solar cells, electronics, and sensors to act as a part of solar array with programmable capability.
OSSB panels have high structural strength, load bearing and stability in both directions, as well as superior workability and excellent nail holding properties on all sides. Water permeability treated OSSB panels are more water resistant than treated traditional wood panel boards because they have no internal gaps or voids.
In addition to repair costs, the condition of a road surface has economic effects for road users. Rolling resistance increases on rough pavement, as does wear and tear of vehicle components. It has been estimated that poor road surfaces cost the average US driver $324 per year in vehicle repairs, or a total of $67 billion.
Oriented strand board (OSB) is a type of engineered wood, formed by adding adhesives and then compressing layers of wood strands (flakes) in specific orientations. It was invented by Armin Elmendorf in California in 1963. [ 1 ]
Although chipseal is an effective low-cost way to repair roads, it has some drawbacks. Loose crushed stone is often left on the surface, owing to underapplication of bitumen or overapplication of stone. If not removed, this can cause safety and environmental problems such as cracked windshields, chipped paint, loss-of-control crashes ...
Large self-supporting wooden roof built for Expo 2000 in Hanover, Germany. Engineered wood, also called mass timber, composite wood, man-made wood, or manufactured board, includes a range of derivative wood products which are manufactured by binding or fixing the strands, particles, fibres, or veneers or boards of wood, together with adhesives, or other methods of fixation [1] to form ...
The technique is not perfect, as freeze-thaw cycles (in cold-winter regions) and tree root growth can eventually result in damage which requires repair. In highly variable climates which undergo multiple freeze-thaw cycles, concrete blocks will be formed with separations, called expansion joints, to allow for thermal expansion without breakage.