Assembly Based On Ultra-high Performance Concrete Study On Thermal Performance Of Prefabricated Insulation Wall System

With the continuous development of China’s industry in recent years,the energy consumption of various industrial products becomes heavier and worse,and the living environment is deteriorating constantly.It is urgent for us to transform and upgrade some traditional energy-intensive industries,in which the assembled building is a good development direction,and through investigation and research,it is found that the assembled buildings have a great advantage in production technology、construction method、building Energy saving and construction efficiency,compared with traditional building methods.On the other hand,the cost management 、 assembly accuracy 、material consumption and building energy efficiency of the assembled building still need to be improved.Among them,the main maintenance structure of house building,wall,needs to be improved and improved in these aspects to adapt to the current development theme of green 、 environmental protection and energy conservation in China.This subject takes the assembly type building as the background,carries on the preparation and the mechanical performance analysis to the prefabricated assembly type insulation wall structure layer,then carries on the thermal performance analysis to the prefabricated insulation wall body under the different ambient temperature,using the ANSYS software,examines the wall temperature field and the temperature stress change under the different temperature,finally,combined with engineering examples,compared with ordinary brick masonry building,analysis of their energy consumption of buildings.The experimental results show that: for the structure layer of prefabricated insulated wall,through the optimization selection of raw materials and orthogonal design,It is found that the steel fiber content has great influence on Ultra-high performance concrete strength,and with the increase of the amount of steel fiber,the flexural and compressive strength of the hardened Ultra-high performance concrete are significantly improved when the volume of steel fiber increases from 0.5% to 2.0%,its 28 d compressive strength increased by 37.5%;in the Ultra-high performance concrete new mixing fluidity,water-reducing agent has played an important role,when the increase in the amount of 3%,the expansion of the concrete can increase by 90% or more;the test concludes with the addition of Silica fume 25%,The amount of quartz powder added 15%,the ratio of 0.18,steel fiber content 2.0%,water-reducing agentDosage of 5% of the test mix ratio as prefabricated insulation wall structure layer.Then the thermal performance of thermal insulation wall is analyzed by ansys finite element analysis Software.The temperature field and temperature stress change of the wall under the action of outdoor ambient temperature-10℃,15℃ and 40℃ were simulated,and the temperature field and temperature stress of the wall were changed in the case of 10℃ and 40℃,in which,at 10℃,The maximum stress of the wall is 37.368 Pa,the maximum strain is 0.336 mm,at 40 ℃,The maximum stress of the wall is 20.707 Pa,the maximum strain is 0.189 mm,the insulation layer in the middle is the smallest in the whole simulation process,whether it is the stress or the strain,and also found in the simulation process,no matter which season,in the corner and The stress concentration is shown in the edge position of the wall,and the wall is found to be prone to crack in the cold winter due to the tensile stress and the temperature stress strain diagram,and the wall is prone to the phenomenon of empty drum due to compressive stress during the hot summer.finally,using DeST-h Residential building energy simulation software to the wall of the building energy consumption analysis.The results show that the use of prefabricated insulation wall building energy consumption than the use of ordinary coal gangue block as a wall material of the building energy consumption is much lower,heating energy consumption decreased by 28.67 % and air conditioning energy consumption decreased by 33.72 %;We also found in the simulation environment,for the thermal insulation of the roof and ordinary concrete roof,the former energy consumption is much lower than the latter.It is necessary to use thermal insulation materials on the roof.In addition,in the construction process of the roof waterproof measures to be vigilant.On the one hand it affects the quality of the housing works.On the other,it also plays a very important role in protecting the roof insulation material.Through various simulation tests of prefabricated heat preservation wall,it is found that both its mechanical properties and the thermal performance of building wall and the energy consumption of buildings are much better than the general architectural wall,which has high engineering application Value.