Research On The Performance Of Anisotropic Rock Wool Composite Insulation Integrated Formwork

In the context of green and low-carbon development of the construction industry,insulation materials for building energy efficiency are widely used.In order to improve the quality of building energy saving and respond to the requirements of assembly type building,the development and application of building insulation and structural integration free formwork has become a hot direction in the industry.In order to meet the requirements of the building fire code,the traditional insulation structure integration free formwork using rock wool board or rock wool strip one-way splicing,by increasing the thickness to enhance the system insulation performance,or increase the apparent density to enhance the mechanical properties of the system.However,this type of formwork has a large self-weight and is prone to problems such as fa?ade structural safety and waste of resources.Therefore,this study innovatively proposes an anisotropic rock wool composite insulation formwork system.Through the study of its mechanical and thermal properties,it has the advantages of lower self-weight,excellent thermal insulation performance,better mechanical properties and convenient construction compared with the traditional heat insulation integrated formwork.The main studies are as follows:（1）In the construction innovation of anisotropic rock wool composite insulation template,the rock wool board（parallel fiber）and rock wool strip（vertical fiber）are optimized for grouping,and inorganic insulation mortar and mesh cloth are coated on both sides of the insulation layer.Based on the thermal performance and economy,calculate the economic thickness of insulation layer.In this paper,rock wool board and rock wool strip with apparent density of 120 kg/m³ and thickness of 80 mm were selected for the study.（2）A combination of laboratory tests and ANSYS simulations was used to analyze the thermomechanical properties of anisotropic rock wool panels in the range of 10%to 90%of rock wool panels.The results show that as the proportion of rock wool board is more,the mechanical properties of anisotropic rock wool board gradually decreases and the thermal insulation performance increases.（3）Combined with the production process and thermodynamic properties,the proportion of rock wool board and rock wool strip of 50%each was selected to carry out the study of anisotropic rock wool board refinement spelling method,and eleven working conditions were set.With the thermodynamic parameters as the optimization target,four working conditions are selected as the final splicing method of the anisotropic rock wool composite insulation formwork.Using the heat transfer coefficient tester,the heat transfer coefficient of the template was tested,and the measured results varied in a trend consistent with the numerical simulation results,with the size of the heat transfer coefficient ranging from 0.427 to 0.541W/（m²·k）.（4）Calculate the load value of the anisotropic rock wool composite insulation formwork according to the relevant specification,1.05 k N/m^2.In the flexural test with a load of 5.21k N/m²,the anisotropic rock wool composite insulation formwork remained in an elastic state and the mid-span displacement deformation was within the limit,indicating that the composite formwork has good flexural performance.（5）The results of impact test with free fall height of 1 m,impact mass of 12.5 kg and impact times of 50 times show that the anisotropic rock wool composite insulation formwork has good impact resistance.To sum up,according to the heat transfer coefficient,flexural test and impact resistance,the best anisotropic rock wool composite insulation formwork splicing form is finally selected.