Research On Mortice-Tenon Energy-saving Wall With Standard Modulus

Development of building wall has got in great touch with land, resource, environment and energy-saving building. It has been tidal current in scientific research to develop new kinds of building wall. In order to provide a kind of strip consolidation wallboard with tenon-and-mortise work building blocks and job practice, research on a molded consolidation wall that can save energy has been performed. The wallboard is actually tenon-and-mortise work building blocks made in a factory, while the connecting piece and foamed poly-p-phenylene board are consolidated in job site. The wallboard can set up a kind of stringent specification wall that saves energy. The process can be completed one-time at working face.Essential structure of the molded consolidation wall that can save energy is designed in this thesis. The wall is made up of tenon-and-mortise work building blocks, connecting pieces and heat insulator. It also confirmed basic dimension of tenon-and-mortise work building blocks, action and constitution of connecting pieces and basic nature of heat retaining and so on. At the same time, based on technique of manufacture about the existing building blocks, the production, process and flow path are analysed, and suggestion has been brought forward for execution of the Mortice-Tenon wall.In order to research the basic performance of the wall, If Mortice-Tenon wall is regarded as two-way heterogeneous exterior-protected construction, average thermal resistance can be calculated. Planomural stabilization theory may be used to calculate its coefficient of heat transmission. The economic thickness of the insulating layer is finally analyzed. Analysis outcome shows that coefficient of heat transmission is only 0.689 W/(m2-K), it is far lower than that of other common wall, and has very good energy-saving effect. When thickness of the insulating layer of the wall is 0.08m, it will has best economic indicator, and coefficient of heat transmission of the wall is only 0.400 W/(m2·K). Theory of environment noise is also used to analyze noise isolation. When entrance sound wave frequency is 125Hz, sound transmission loss is 55dB, resonance frequency is 54Hz, and the result meets operating requirements of civil and public building. Owing to having medium air of two-layer structure of the wall (or adding noise isolation material), noise isolation of the wall is increased. If two-layer fly ash (90mm thickness) ceramisite concrete together with 40-60mm thickness air can get better noise isolation result. When the energy-saving requirement is 65%, the practical water vapor pressure of the ceramisite concrete wallboard is far lower than the saturation water vapor pressure. The joints of the wallboard do not intersect, so the phenomenon of freezing and dampness in the wallboard will not appear. The wallboard can resist freezing and dampness much well.Low-cycle horizontal direction repeated-load test and numerical analysis have been down in this thesis. Research shows that, once Mortice-Tenon wall generates crack, its width is homogeneous along the crack. The whole mechanical property of the wall is better, and it can bear big horizontal load. Connecting pieces does coordination for deformation between two wallboards to resist deformation expansion, to enhance bulk property and tensility. In case of generating large deformation, it can ensure the crazing wall not to pull-out and collapse. The cracking load is about 48 percent of ultimate load. It is smaller than the ratio of homogeneous filler wall with no shell frame, but bearing capacity has improvement in a certain extent. It shows that tenon-and-mortise work building blocks can improve non-deformability of the wall. Tensility of the wall is also improved at the same time. After the wall bear limit load, it do not collapse with crack. Because of tenon-and-mortise work of the wall, small horizontal deformation will appear while the wall bear big horizontal repeated load. The wall works normally. Result from repeated-load test and numerical analysis shows that mortice-tenon energy-saving consolidation wall has wonderful whole mechanical property. Bearing big horizontal repeated load, majority of the wall does not bear limit load. If some especial position of the wall, such as socket, is modified properly, ability on bearing load will be improved ulteriorly.