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近几年不少单位采用轻骨料混凝土做墙体材料,有的采用全轻混凝土,由于造价较高,轻砂不好解决,给大面积推广应用带来了困难。如用重砂轻骨料混凝土做墙体材料则保温性能较差。因此人们对用大孔无砂混凝土做墙体材料颇有兴趣。现在无筋大孔无砂混凝土比较成熟,但它的应用范围受到了一定限制。大孔无砂混凝土与钢筋之间的粘结力及钢筋锈蚀等是问题的关键。一、大孔无砂混凝土与钢筋之间的粘结力大孔无砂混凝土与钢筋之间的粘结力
In recent years, many units use lightweight aggregate concrete as wall material, and some use full-light concrete. Due to high cost, light sand is not well resolved, and it has brought difficulties to large-scale application. If heavy sand lightweight aggregate concrete is used as wall material, the insulation performance is poor. Therefore, people are interested in using large-hole sandless concrete as wall material. Nowadays, no-barrier large-hole sandless concrete is mature, but its application range is limited. The key to the problem is the adhesion between macroporous non-sand concrete and steel bars, and corrosion of steel bars. I. Adhesion between macroporous non-sand concrete and steel reinforcement Adhesion between macroporous non-sand concrete and steel reinforcement