随着养护龄期的增长,再生混凝土的强度基本呈线性关系递增;再生粘土砖混凝土替代率为40%~80%时,强度折减一级;当粗骨料全部被粘土砖取代时,再生粘土砖混凝土强度等级仅为C30;再生废弃混凝土骨料的混凝土替代率为20%时强度最高,废弃混凝土占粗骨料的80%时,强度最低;再生粘土砖、废弃混凝土骨料的混凝土替代率和强度基本符合线性递减关系。最优骨料类型为20%替代率的再生废弃混凝土。 With the increase of curing age, the strength of recycled concrete increases linearly. When the replacement rate of recycled clay brick is 40% ~ 80%, the strength is reduced by one degree. When the coarse aggregate is replaced by clay brick, Clay brick strength is only C30; recycled aggregate concrete aggregate replacement rate of 20% of the highest strength, waste concrete accounted for 80% of the coarse aggregate, the lowest strength; recycled clay brick, concrete replacement of waste concrete aggregate The rate and intensity are in line with the linear decreasing relationship. Recycled waste concrete with an optimal aggregate type of 20% replacement.