后掺粗骨料泵送混凝土柱小偏心受压性能研究

Study on Small Eccentric Compression Behavior of Scattering-filling Coarse Aggregate Pumping Concrete

对粗骨料后掺率分别为0、10%、20%、25%、30%5种混凝土柱试件进行了小偏心受压试验,分析了各后掺骨料混凝土柱的极限承载力、构件的延性、混凝土及钢筋应变等基本性能。研究表明:后掺骨料混凝土柱试件的极限承载力比普通混凝土柱试件有所提升,后掺率为10%的混凝土柱试件延性最好,后掺率为20%的混凝土柱试件的延性与普通混凝土柱相近。综合来说,后掺率为20%时,混凝土柱具有较好的受力性能及工作性能。

Small eccentric compression tests are carried out for five kinds of scattering-filling coarse aggregate concrete columns to analyze the ultimate bearing capacity, component ductility, concrete strain and reinforcement strain, where the ratios of the replacement of five kinds of specimens are 0%, 10%, 20%, 25% and 30% respectively. The results show that the ultimate bearing capacity of scattering-filling coarse aggregate concrete specimens is higher than that of ordinary concrete specimen, the ductility of specimen when the replacement rate is 10% is the best and the ductility of specimen with a coarse aggregate replacement rate of 20% is similar to that of ordinary concrete specimen, In summary, when the replacement rate is 20%, the concrete column has good mechanical properties and working performance.