Tensile performance test of building infill walls steel bar after reinforcement with inorganic adhesive
Due to the variety of structural forms and material types of building infill walls,the tensile performance will change after reinforcement with inorganic adhesive.Using calcined magnesium oxide,potassium dihydrogen phosphate,borax,and fly ash as raw materials,different mixing proportions of magnesium phosphate cement(MPC)inorganic adhesive specimens were prepared to test the tensile performance of building infill walls steel bar after reinforcement with inorganic adhesive.By analyzing the effects of borax content,the ratio of magnesium oxide to potassium dihydrogen phosphate(M/P),and the content of fly ash on the tensile strength and setting time of MPC inorganic adhesive,the optimal mixing ratio was determined.It was reinforced with glass fiber reinforced material(GFRP)for building infill wall specimen,the tensile performance was then studied.The research results showed that when borax content was 10％of the mass of magnesium oxide,M/P=5.5,the ratio of the content of fly ash to the sum of the mass of magnesium oxide and potassium dihydrogen phosphate was 12％,the performance of MPC inorganic adhesive was relatively optimal.Strengthening the specimens of building infill walls could effectively enhance their load-bearing capacity.The load-bearing capacity of specimen S2 was higher than that of specimen S1,and its tensile performance was more prominent.
building infill wallsinorganic adhesivetensile performancemixing ratiosetting timetensile strength
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