Experimental Research Of Sisal Fiber Reinforce Rice Husk Mortar Assembled Wallboard

Bar-Reinforcing-Net sandwich concrete external wall has been applied in prefabricated construction within a certain extent on account of its properties of high strength,low price,row material obtained easily.However,in the steel frame prefabricated constructions,the application of Bar-Reinforcing-Net sandwich concrete external wall has been limited largely because of its other properties of large mass,low ductility,poor crack resistance and impermeability.The original rice husk,sisal fiber,sand,cement and water as raw materials by specific mixing forming process,using rice husk volume instead of sand as the variable preparation of sisal fiber husk mortar,saving resources and protecting the ecological and economic benefits to rice husk waste;The use of sisal fiber cement mortar instead of ordinary fine stone concrete to solve the self-important,anti-seepage and anti-cracking performance of the shortcomings.In this paper,the performance test of sisal fiber rice husk mortar was carried out.On the basis of this,the study on the bending performance of the mortar with the opening and the not opening of the rice husk mortar was carried out:(1)In order to study the influence of the volume fraction of sisal fiber,the ratio of length to diameter and the content of rice husk on the mechanical properties of cement-based materials.In the sand,cement,rice husk,sisal fiber,water works as experimental materials,the mix design of different volume content of sisal fiber,rice husk and rice husk mortar volume replacement of different sisal fiber length were the compressive strength of 28 days test,the flexural strength of 28 days test.The results show that the mechanical properties of cement based materials are enhanced by sisal fiber and rice husk in varying degrees.(2)The durability of sisal fiber husk mortar was tested by orthogonal test.Including carbonation,sulfate wet and dry cycle,freeze-thaw cycle,impermeability test.The results showed that all kinds of rice husk mortar could meet the standard requirements,and the lower the replacement rate of rice husk in a certain range,the better the durability test results.(3)In order to study and verify the effect of rice husk and sisal fiber on the properties of mortar,the microstructure and mechanism of rice husk mortar were analyzed.The results showed that the rice husk had the function of the aggregate and the water was released during the mixing process,the uneven surface also makes it more powerful bite force between cement and stone,forming the whole structure of rice husk cement stone,and improving the performance of cement mortar.With high elastic modulus,high compressive strength and deformation properties of high limit under main load in sisal fiber matrix dislocation motion,constraint matrix deformation and hinder,enhance the overall of cement-based materials,enhance the performance of cement mortar.(4)Combined with the above effects,the length of 16mm and the 0.1%volume of the sisal fiber was added to the rice husk mortar with a volume replacement rate of 35%,and the(3m*3.3m)external wall plate was fabricated.The results show that,when the vertical displacement of the external wall plate is 1.04mm,the crack is 7.78kN/m~3,With the load increasing,the uniformly distributed load is 15.15kN/m~3.The maximum strain value of the exterior wall without opening is 478 and the maximum displacement is 5.703mm.When the external wall is cracked,the uniform load is 4.438kN/m~2,the crack height is about4.3cm,and the maximum uniform load is 6.93kN/m~3,the maximum strain value is 657,the maximum displacement is 2.558mm.Compared with the design value of the largest wind load in the whole country,it can be concluded that the fiber husk mortar exterior wall board of 2.65kN/m3 can resist the lateral wind load.