Experimental Study On Basic Mechanical Properties And Static Energy Consumption Of Glazed Hollow Beads Concrete

Based on the background of building energy conservation and environmental protection requirements,this paper proposes the solidification and disposal methods of fly ash,silica fume and glazed hollow bead in concrete.As an inorganic thermal insulation material,glazed hollow bead not only have the characteristics of thermal insulation and heat insulation,but also meet the theme of building energy conservation and environmental protection.However,considering their light weight and fragile physical properties,the mechanical properties of concrete will be reduced.Therefore,In this paper,fly ash and silica fume are used as cementitious materials to replace cement and mixed into concrete.On the one hand,it can play a positive role in the mechanical properties of vitrified microbead concrete.The amount of cement also reflects the connotation of sustainable development.This thesis adopts theL₁₆（4 ~5）orthogonal design table,the water-binder ratio is0.38,0.42,0.46,0.5,the content of silica fume is 0%,5%,10%,15%,and the content of fly ash is 0%,15%,25%,35%,and the volume dosage of vitrified microbeads is 0%,20%,40%,60%.The influence of various factors on the basic mechanical properties of concrete was explored,and the relationship between the mechanical properties and the compressive strength of the cube was analyzed.Residential energy consumption of the structure.The test found:（1）The effect of various factors on the compressive strength of vitrified microbead concrete cubes is arranged in order from strong to weak:the content of vitrified microbeads,the water-binder ratio,the content of silica fume,and the content of fly ash.The optimum level combination is water The glue ratio is 0.42,the content of fly ash is35%,the content of silica fume is 5%～10%,and the content of vitrified microbeads is40%.（2）The effect of each factor on the splitting tensile strength of vitrified microbead concrete is ranked from strong to weak:the content of vitrified beads,the water-binder ratio,the content of fly ash,and the content of silica fume.The optimal level combination is:The water-binder ratio is 0.38,the content of fly ash is 0%,the content of silica fume is 5%,and the content of vitrified microbeads is 20%.（3）The effect of each factor on the flexural strength of vitrified microsphere concrete is ranked from strong to weak:the content of vitrified microspheres,the ratio of water-to-binder,the content of fly ash,and the content of silica fume.The ratio is 0.42,the content of fly ash is 0%,the content of silica fume is 5%,and the content of vitrified microbeads is 20%.（4）The best fitting relationship between the axial compressive strength,split tensile strength,flexural strength,elastic modulus and cube compressive strength of vitrified microbead concrete are:f_cp=0.84 f_cc、f_ts=0.7391f_cc^0.4672、f_f=0.49 f_cc^0.57、E_c=973 f^<sub>cc^0.9452.（5）The thermal conductivity of the vitrified microsphere concrete prepared with the optimal ratio of cube compressive strength is 0.86 W/（m·K）.Residential building heat consumption index decreased by 26.37%.