Recycling of porcelain tile polishing residue in portland cement: hydration efficiency.
Ceramic tiles are widely used by the construction industry, and the manufacturing process of ceramic tiles generates as a major residue mud derived from the polishing step. This residue is too impure to be reused in the ceramic process and is usually discarded as waste in landfills. But the analysis of the particle size and concentration of silica of this residue shows a potential use in the manufacture of building materials based on portland cement. Tests were conducted on cement pastes and mortars using the addition of 10% and 20% (mass) of the residue. The results of compressive strength in mortars made up to 56 days showed a significant increase in compressive strength greater than 50%. The result of thermogravimetry  shows that portlandite is consumed by the cement formed by the silica present in the residue in order to form calcium silicate hydrate and featuring a pozzolanic reaction. This effect improves the performance of cement, contributes to research and application of supplementary cementitious materials, and optimizes the use of portland cement, reducing the environmental impacts of carbon dioxide emissions from its production.
Materials Science and Engineering Post-Graduation Program, Santa Catarina Extreme South University, Cricúma, Santa Catarina 88806-000, Brazil. pelisser@hotmail.com
Fernando
F
Pelisser
Luiz Renato
LR
Steiner
Adriano Michael
AM
Bernardin
D000537:Aluminum Oxide / Q000032:analysis; D002151:Calorimetry; D019245:Compressive Strength; D060389:Construction Industry; D003252:Construction Materials / Q000032:analysis; D003776:Dental Porcelain; D005290:Ferric Compounds / Q000032:analysis; D007220:Industrial Waste / Q000032:analysis; D059027:Recycling; D012822:Silicon Dioxide / Q000032:analysis; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
D005290:Ferric Compounds; D007220:Industrial Waste; D014867:Water; D003776:Dental Porcelain; C000499:ferric oxide; D012822:Silicon Dioxide; D000537:Aluminum Oxide