Recycled gypsum block: development and performance

Abstract

The gypsum plaster waste is still faced a serious economic and environmental problem. Considering the high volume and the destination often inadequate. Intending to provide a mitigating alternative, this research intends to develop blocks that incorporate the industrial gypsum plaster waste through reverse logistics. For this, a physic-chemical recycling process of gypsum plaster waste was carried out on an industrial scale and the developed material was characterized in anhydrous and fresh state. Then, blocks were made with the recycled material and characterized according to NBR 16495 (ABNT, 2016). After its characterization, the material was evaluated for its mechanical performance when used in walls, regarding the tests of suspended vertical loads and hard and soft body impact, according to the guidelines included in the performance standard NBR 15575-4 (ABNT, 2013). The walls constituted with the developed material showed satisfactory performance, having, in some cases, presented superior performance in comparison to the conventional walls of gypsum blocks, according to results presented by the Technical Assessments Document - DATEC nº 27 (2015). Finally, small walls of the recycled gypsum block and gypsum glue were elaborated to verify the compressive behavior. Regarding these verifications, it was noticed that the small walls obtained good resistive capacity.

Evaluation of Feasibility for Novel Modular Block Construction

“…Plants with overhead bins and front-end loaders can also help reduce aggregate costs. Santana et al (2020) stated in their research paper that Gypsum plaster waste is still a major economic and environmental issue (8). Recycling was used to make blocks.…”

Comportamiento térmico de mampostería de bloques de yeso hidrófugo con variación del espesor de revestimiento

“…Se utilizó el bloque de yeso hidrófugo, material que ha estado reemplazando tecnologías tradicionales como bloques de hormigón y cerámica para mamposterías. Esto se debe a las ventajas que ofrece, tales como menor tiempo de ejecución, flexibilidad de diseño, mejor rendimiento termoacústico, comodidad, entre otros (Santana et al, 2019). La norma NBR 16494 (2017) proporciona características (Tabla 1) y lineamientos para el uso de bloques de yeso hidrófugo en mampostería vertical.…”

Influence of the Heating Temperature and Fineness on the Hydration and Mechanical Property of Recycled Gypsum Plaster

“…Weimann et al [11] conducted an evaluation of the environmental impacts for the recycling of waste gypsum and showed that the use of recycled gypsum plaster was environmentally friendly. Santana et al [12] carried out an industrial production of recycled gypsum and proved that the recycled gypsum plaster could be used for the production of block. e above research results confirmed the feasibility of using recycled building gypsum as a fresh cementitious material.…”