Preparation And Thermal And Moisture Properties Of WSE Based Lightweight Thermal Insulation And Moisture Control Mortar

Humidity control is the decisive factor for the improvement of indoor energy consumption,but it also plays a decisive role in improving people’s physical and mental health Considering the situation,and for the call of saving energy,the research on creating a more comfortable indoor environment with heat preservation and humidity control materials has been paid more and more attention by scholars.Based on the consideration of indoor environment heat preservation and humidity control and energy saving,a new composite hygroscopic and thermal insulation material is innovatively lightweight treated,and the improvement and exploration of heat and humidity performance are carried out,and its application energy consumption is simulated and calculated.The main contents are as follows:Based on sepiolite,expanded perlite,wood fiber,polypropylene fiber,latex powder and cement,WSE based composite hygroscopic and thermal insulation mortar with environmental friendliness was prepared.The WSE based mortar was lightweight treated by foaming method,and the preparation process of foaming mortar was clarified.Then the foaming mortar was cured to obtain WSE based lightweight composite hygroscopic and thermal insulation mortar.In order to explore the influence of different foaming levels and curing conditions on the performance of the new mortar,group preparation and curing were carried out,and the physical properties and heat moisture properties of each group of test blocks were measured.The results show that,firstly,with the increase of curing days,the mechanical properties of the material will be significantly improved.Secondly,with the increase of foaming level,the density,compressive strength and flexural strength of WSE based lightweight composite hygroscopic and thermal insulation mortar will gradually decrease,but its thermal resistance and moisture absorption capacity will be significantly improved.Through comprehensive comparison,it can be found that WSE based lightweight composite hygroscopic and thermal insulation mortar with0.4%foaming level has the best comprehensive performance,its thermal conductivity is only 0.087w/(M·K),density is 580kg/m~3,moisture absorption performance is good,and mechanical properties meet the national standard of foaming cement.With COMSOL Multiphysics finite element software coupled heat and moisture model is used as a numerical calculation tool to simulate the annual energy consumption of ordinary wall,WSE based mortar wall,and new WSE based light mortar wall.It is found that after the WSE based composite hygroscopic and thermal insulation mortar prepared by predecessors,the annual building energy consumption can be reduced by 22.58%～23.85%,while the new WSE based light mortar after foaming transformation can reduce the annual building energy consumption Compared with the ordinary wall,the annual energy saving energy consumption of the wall can reach 31.09%～33.28%,and according to the simulation data,the summer load mainly comes from the latent heat load,which accounts for a large proportion,so the latent heat load is an important part of the annual energy consumption simulation calculation,and the orientation factor and the solar radiation in winter and summer also have a great impact on the energy consumption.It is suggested to select the most suitable orientation factor according to the main orientation factor The thickness of thermal insulation layer,thermal insulation measures and shading methods should be improved.In this paper,through theoretical analysis,experimental preparation,a large number of data testing and simulation analysis,the WSE based lightweight composite hygroscopic and thermal insulation mortar with environmental friendliness is innovatively obtained by foaming method.The influence of foaming level and curing days was discussed,the thermal performance was optimized,and the problem of excessive weight of traditional moisture control mortar was solved.In addition,by means of COMSOL simulation,this paper discusses the energy-saving potential of WSE based new composite hygroscopic and thermal insulation mortar,which provides some data support and theoretical basis for the promotion of composite thermal insulation and humidity control mortar.