Construction waste gypsum: minimization and leaching studies

Abstract

Plaster is a very useful material in construction, but it is responsible for producing waste in the manufacturing process and also the demolition works. This work seeks alternatives that reduce the production of waste in the manufacturing process using plaster additives in their composition and also to assess the damage caused by improper disposal of waste produced in buildings demolition, due to its possible use in fish farms. Different modified plasters were evaluated on various parameters such as cure time, appearance, resistance and morphological changes. The modified plasters with diatomaceous earth show good results. Waste of plaster and pure plaster were submitted to leaching tests at different pH values to evaluate its behavior in two different periods of time. It was analyzed parameters such as conductivity, turbidity and calcium contents in the leached samples, checking that the plaster and your residue influence the aquatic environment. It was found that pH, conductivity and turbidity are altered when subjected to gypsum concentrations.

Keywords

• tempo de cura
• resíduos sólidos
• aditivos
• lixiviação