Through the preparation of concrete with the maximum particle size of four different coarse aggregate,the influence of the maximum particle size of coarse aggregate on the performance and microstructure of C70 ready-mixed concrete is explored.The results show that the maximum particle size of coarse aggregate increases,the fluidity of premixed concrete mixture improves and the compressive strength of C70 premixed concrete increases with the maximum particle size;when the maximum particle size of coarse aggregate increases by 25 mm 31.5 mm,the porosity of concrete microstructure increases,and the harmful holes and harmful holes increase significantly.Based on the above influence rules,it is clear that the coarse aggregate with a maximum particle size of 25 mm should be selected for preparing C70 large liquid ready-mixed concrete.
关键词
粗骨料最大粒径/预拌混凝土/混凝土性能
Key words
maximum size of coarse aggregates/ready-mixed concrete/concrete performance
维普
万方数据