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Home About US History Organization (in japanese) IR Info(japanese) Contact us Wooden Pavement W-Wood WatanabeSato: The Pavement What is W-Wood? It is a mixture of wood chips and urethane resin binder, a quite new pavement material with natural wood color and comfortable elasticity. Features It has the nature of cushion that no traditional pavement materials for footpaths had ever have. It is water permeable without forming paddle in the time of rain. It is stable and durable for long period. Where to use? natural walkway, promenade parks, play grounds, walkway around hospitals jogging course camping lots, plaza walkway for golf courses miscellaneous (noise protecting wall in rooms ...)   Construction Wood chips and urethane resin are mixed at the site and are spread by rakes and finished by trowels. Possible to open for use next day. Layer Structure   Properties of W-Wood pavement Test Items Evaluation value Test value Remarks Permeability Test Permeability coefficient kg/cm2 5.5x10-2 drainage asphalt 1.0x10-2 Skid Resistance Test BPN method dry 70-80 specified value of Tokyo >=45 wet 60-65 fine graded asphalt mixture 78 at dry 62 at wet Shock Absorbing Test Golf Ball rebound coefficient 30 *1 urethane track@40-50 Elastic rebound Test Steel ball rebound coefficient 15 *2 urethane track@25-35 Flexural Test Tensile strength kg/cm2 >=15 *3 by JIS-A-5201 Deformation at Flexural Test Deformation mm >=30 *4 by JIS-A-5201 Tensile Adhesivity Test Tensile strength kg/cm2 4-6 by Manual for Pavement Test Method *1, *2 The values are in case of 2 cm thick layer on the base course of asphalt mixture. *3, *4 The values are the limit value of test apparatus. Not destructed at the limit deformation. Do you doubt if W-Wood will be burnt by thrown cigarette fire? We prepared answer for this question. Please see Next page.to Next Page

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