Research On Mechanical Properties Of Steel Mesh Cement Stone Foam Super High Partition Wall

In recent years,the country has vigorously introduced policies such as energy saving and emission reduction as well as carbon peaking.Combined with the continuous promotion of construction industrialization,the construction market is progressing very fast.The newly assembled lightweight wall panels have become the leader in the construction industry with their lightweight and high strength,economic and environmental protection,and easy installation.However,when it is used in actual projects,a series of new problems have emerged,such as in the structural system of ultra-high(more than 4m)story height,whether assembled wall panels or traditional brick masonry partition walls,it is necessary to set a ring beam in the wall to improve the stiffness of the wall and the structure.Setting up a ring beam not only increases the amount of material and labor costs but also delays the construction progress,resulting in both cost and time waste.In response to this problem,this paper proposes a newly assembled composite wall,namely,a steel wire mesh cement stone foam super high partition wall,the partition wall is a newly assembled wall composed of stone foam lightweight wall panels composite steel wire mesh cement surface layer,not only has the green and environmental protection,thermal insulation,construction and other characteristics of assembled walls but also greatly improve the wall’s own stiffness and bearing capacity.In this paper,these works are mainly done on this wall.(1)Material physical properties tests were done on the raw materials of the wire mesh cement facing,and it was found that the recycled low-strength fine aggregate used for mixing the plastering mortar had a fineness modulus in the medium sand category,and the aggregate gradation was Zone 2,which met the application conditions.The plastering mortar has good consistency,water retention,and flexural,and compressive strength,which meets the requirements of mechanical spraying construction.(2)The in-plane axial compression test was conducted on the wall to obtain its damage form,and the compressive strength,elastic modulus,and Poisson’s ratio of each specimen were calculated according to the calculation method given in the specification.Considering the plastic influence of the material,the formula for calculating the axial compressive bearing capacity in accordance with the wire mesh cement stone foam super high partition wall was derived.(3)According to the out-of-plane bending test of the wall,it is known that the wire mesh cement can effectively inhibit the growth of the spanwise deflection and improve the strength and stiffness of the member.Wire mesh cement can make the two spliced members whole,make up for the weakness of insufficient shear bearing capacity at the splice,and show mechanical properties similar to those of the unspliced specimen,so the wire mesh cement stone foam super high partition wall can be applied on the super high rise high(more than 4m)structure,without setting the ring beam in the middle can also make the structure have no less stiffness to meet the use requirements.Combined with the strain distribution curve of each wall panel mid-span section along the section height,it can be considered that the wall conforms to the assumption of a flat section.(4)Based on Reissner’s theory and calculation model of rigid sandwich composite panels,the calculation formula of flexural bearing capacity of steel wire mesh cement stone foam super high partition wall was derived.Meanwhile,the flexural stiffness was calculated by the combined stiffness method,and the span-wise deflection of each specimen was theoretically verified.(5)The construction process of the steel wire mesh cement stone foam super high partition wall is introduced,the construction method and requirements of this assembled composite wall are given,and finally,four engineering application suggestions are made for it.