Study On The Performance Mechanism Of Sulfoaluminate Foam Concrete Modified By Animal Protein

Foamed concrete belongs to a kind of aerated concrete,whose internal porous structure can reflect and absorb external heat,and a good internal hole structure determines the excellence of its heat insulation performance.The purpose of this subject is to explore an ultra-high performance self-insulation system,which modified the mother liquid of animal protein foam,and prepared a structural stable foam with ionic surfactant.The super-high performance sulphoaluminate foam concrete with good thermal insulation,low drying shrinkage and low water absorption is prepared by adding modified foam to ordinary fast-hard sulphoaluminate concrete.The results show that the addition of Sodium Dodecyl Sulfate can make up for the deficiency of foaming ability of animal protein foaming agent,and the maximum foaming multiple of modified foaming agent can reach 92 times.α-sodium Olefin Sulfonate,Effectively reduce foam 1 h subsidence distance.Foaming capacity of three-doped S_1.8modified foaming agent is up to 92 times,Foam 1 h minimum settling distance is 3.2 ml,The 1 h discharge of foam decreased to 4.2 g.In order to ensure that the modified foam concrete has sufficient compressive strength and excellent durability,determine the water absorption rate,heat conductivity and compressive strength and mechanical properties.Finally,under the S_1.8triaddition modification ratio,The drying shrinkage value of foam concrete is the smallest in each age,Maximum dry shrinkage for 28 d of 800 grade foam concrete not exceeding 0.4 mm/m,Maximum drying shrinkage of 28 d of 600 grade foam concrete not exceeding 0.7 mm/m,Compared with the other three kinds of modification ratio increased by 15.At the same time dry density of 600 foam concrete plate,The most internal pore content,The pore size is mainly distributed 450μm～600μm.The minimum thermal conductivity determination value is0.1148w/（m·k）.