Magnesium lightweight board for application in the dry construction

Abstract

In the Civil Engineering sector, dry construction has been considered a real alternative to increase the industrial level of the constructions. In this way, building materials such as panels and boards have been employed, especially in Light Steel Frame and Dry Wall systems. In Brazil, these building elements are produced based on Portland cement technology and accessories like fiber cement are the most used. The problem of this technology is the high consumption of this binder-like. As reported in the literature, the Portland Cement production involves high levels of carbon dioxide emissions (CO2). Also, the lifetime of the limestone reserves, its principal component, is estimated in 600 years. Thus, the alternative can be the application of magnesia cements associated to new techniques and process, more industrialized and optimized. In this way, the purpose of this innovative research is the development of the alternative composites based on magnesium cement, for the production of oxy-sulphated building elements, in particular, lightweight concrete board for application in the dry construction industry. Thus, it is intended to use light aggregates, whose function is to reduce weight and improve the thermal and acoustic insulation, providing better comfort for the user, when compared to Portland cement board and sheets. As results, it is expected that the mechanical performance of this "new" lightweight concrete boards based on oxy-sulfated magnesia cement attends the minimum requirements of Brazilian standards and turns a viable alternative to the Portland cement boards. In addition, this project intends to add innovative technology to both the mineral industry and civil construction. (AU)