Abstract
The article presents the first results from research, which is deal with recycling of plaster boards and use of the resulting material. The research is carried out within the project MPO Trio c. FV30359 “Recyklace sádrokartonových desek a nová materiálová využití s pridanou hodnotou – GIPSRec”. The plasterboards are produced of stucco, which is calcinated of Flue Gas Desulfurization Gypsum (FGD Gypsum). There is possibility to replace a part of this stucco with recycled material. There is opportunity for saving costs for production. The question how this utilization can change the properties of the products is very important and it is necessary to find the possible improvement or deterioration. This is the objective of this research. The effect on properties was monitored on the samples which was prepared of only pure stucco and of stucco with part of recycled material. There was observed water ratio (splash test), setting times, volume changes, flexural strength, compressive strength and elasticity module.
Highlights
The gypsum was used as a building material for thousands of years
The white stucco calcinated of FGD gypsum is used as main material in production of plaster boards and gypsum plasters
In the first step was observed the behaviour the gypsum slurry depending on the amount of recycled material in recipe
Summary
The gypsum was used as a building material for thousands of years. There are references, that the gypsum occurs on buildings dated 7000 BC. There is concrete in construction and for example gypsum based building materials are very popular for their properties and it is necessary to deal with this issue. Gypsum products have a relatively low bulk density, which ranges from 600–1200 kg m−3, which is about half the bulk density of conventional concrete. This feature allows easy handling of products during construction and the another advantage is less load on the building structure. This water makes the fire protection of the construction, because it decreases the temperature of the surface of the construction [6] The another positive property of gypsum is that it is hygroscopic. The volume changes are relative low during this process [7]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
