Preparation of Ultra-High Performance Concrete Material and Its Application in Prefabricated Buildings Based on CAD

In order to effectively reduce production costs, promote the application of ultra-high performance concrete materials, and reduce the pollution of solid waste, the author proposes the preparation of ultra-high performance concrete materials and its application in CAD-based prefabricated buildings. Ultra-high performance concrete (UHPC) is prepared by using crushed and screened waste stone chips instead of quartz sand as aggregate and applied in prefabricated buildings using CAD. Based on the single factor analysis test, the influence of various factors (water cement ratio, cement aggregate ratio, water reducer content, steel fiber content) on the compressive strength, flexural strength and fluidity of stone chips UHPC was studied. The results show that when the cement-aggregate ratio, water-cement ratio, water-reducing agent content and steel fiber content are 0.63, 0.2, 2.1% and 1.5% respectively, the mechanical properties and working properties of UHPC are the best, the maximum 7d compressive strength is 113.7MPa, and the bending strength is 35.2MPa; By analyzing the stress-strain curve, it is found that adding steel fiber can not only improve the mechanical strength of UHPC, but also significantly improve the toughness and residual compressive strength of UHPC. Conclusion: The test system analyzes the influence of different factors on mechanical strength and working performance, and obtains the best mixing amount of each component. © 2024, CAD Solutions, LLC. All rights reserved.