Recycled concrete, a solution for fine and coarse raw material for new concrete
W.Martinez Molina1C.Lara Gomez1E.M.Alonso Guzman1H.L.Chavez Garcia1F.M.Gonzalez Valdez1A.A.Torres Acosta2J.T.Pérez Quiroz2W.Martinez Alonso3H.Hernandez Barrios4
1. Department of Materials, Faculty of Civil Engineering University of San Nicolas de Hidalgo2. Mexican Transport Research Institute, Ministry of Communications and Transports3. Division of Civil and Geomatics Engineering, Faculty of Engineering, National Autonomous University of Mexico4. Department of Structures, Faculty of Civil Engineering University of San Nicolas de Hidalgo
摘要：Solid waste generation of Hydraulic Concrete, product of demolition, collapse by seismic damages or extraloads, destructive tests of specimens in labs, non-compliance of the quality control in fresh or hardened state, remodeling, buildings re-use, among others, is a new solid waste polluting earth.The most produced material in the world is the Portland Cement（PC）, but its disadvantage lies on its requiring fossil fuels, as well as the COx discharge to the atmosphere.Reuse of Hydraulic Concrete waste abates simultaneously a number of problems, as: dumping of solid waste and COx compounds into the environment; affectation of quarry sand and gravel stones, as well as endemic flora and fauna living in them; storm-water runoff by the inability of strata to filter demolished concrete contained in landfills.The use of crushed aggregates coming from Hydraulic Concrete demolition is used to generate Recycled Concrete, a material that can abate costs, diminish pollution, reduce the cost of building, and protect quarries from unnecessary exploitation.Nonetheless, development of Recycled Concrete faces the challenge of finding optimal designs to achieve the highest mechanical performance under static and dynamic stresses, the need to produce concretes less susceptible to carbonation, and therefore, to corrosion of reinforcing steel that protect with the concrete core, aside from waterproof and dense concrete.
2015 International Conference on Structural,Mechanical and Materials Engineering（ICSMME2015）