Concrete had the biggest proportion of structure material today. It has caused a lots of environmental problems such as emission of carbon dioxide, dust by cement production. For this reason, many study was actively progressed to develop the environment-friendly concrete. Also, it was performed to reduce the cement usage by replacing industrial waste to cement. Specially, wastepaper was contained the wood-fiber. It was known that wood-fiber could combined with cement. For this reason, this study was looking for the way of recycling wastepaper by replacing for the cement. Wastepaper had a low fiber strength and contains a lots of impurities. It was caused that the mechanical performance will be reduced by interruption of bond in cement composite. So, this study analyzed the possibility of recycling wastepaper for replacing cement and carried out experiment about optimum mixing ratio, physical and mechanical properties of concrete to develop environment-friendly concrete products with wastepaper. First of all, the optimum replacement ratio of wastepaper can be obtained from the mortar test using wastepaper. Secondary, was make the concrete product and perform the test to evaluate the application of concrete using wastepaper. This study will be presented with basic data for using wastepaper to structural material economically by making and analyzing concrete product with wastepaper.

Keywords: Mortar, Wastepaper, Concrete product, Mechanical property.