Study On Factors Affecting Vibration And Compaction Molding Of Gypsum-based Block

Gypsum-based block is a new type wall materials, using flue gas desulfurization gypsum and other industrial waste residue as raw material,with the characteristics of energy-saving、environment-protecting and security, it’s comes to be an important development direction of this domain. In order to improve the quality of gypsum-based block and its application in construction. The method of combining numerical simulation and experiment has been taken, the forming process of gypsum-based block factors affecting quality were analyzed, the specific work is as follows:1. According to the properties of raw materials of gypsum-based block, we selected discrete element model and used PFC3D (a kind of simulation software based on discrete element method) to build numerical simulation of the gypsum-based blocks molding process. We got the distribution of the particle density and force chain, and then analyzed the effects on gypsum-based block vertical average density by increasing vibration pressure2. According to numerical simulation of gypsum-based block forming process with different pressing mode and fabric way, inspecting properties of gypsum-based building blocks in different process conditions, the result that the forming process of bidirectional vibration and two fabrics can effectively improve the uniformity of gypsum-based block internal compactness, can improve the mechanical properties of gypsum-based block.3. By numerical simulation of gypsum mixture vibration process with different vibration parameters, the vibration time, vibration amplitude, vibration frequency and their relationship between gypsum mixture density could be got, which determined that the best vibration time, vibration amplitude, vibration frequency of gypsum mixture material are3s,1.2mm and70Hz.4. The experiment studied how the fabric way and the vibration frequency effect gypsum-based block on resistance of compress, experimental results indirectly verify the accuracy of simulation results.In this paper, the research results have certain guiding significance for gypsum-based block molding machine design and manufacturing applications. This article has thirty-one pictures, nine tables and sixty four references.