Strength evaluation of recycled-aggregate concrete byin-situ tests
Strength evaluation of recycled-aggregate concrete byin-situ tests
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DOI：
10.1007/bf02481828
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发表时间：
1988-07
影响因子：
3.8
通讯作者：
R. Sri Ravindrajah;Y. Loo;C. Tam
中科院分区：
文献类型：
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作者：
R. Sri Ravindrajah;Y. Loo;C. Tam
只有当再生骨料混凝土的特性以及这种混凝土的不同特性之间的关系被很好地理解时，才能普遍接受由破碎的混凝土产品产生的用于新混凝土的粗骨料和细骨料。本文介绍了抗压强度与超声波波速和回弹数关系的试验研究结果。已经观察到，对于水养护混凝土的强度-脉冲速度关系受到使用再生骨料的影响。在相同的脉冲速度下，再生骨料混凝土的强度高于天然骨料混凝土。另一方面，强度-回弹数关系不受所用骨料类型的影响。本文还对脉冲速度和回弹数联合估算强度的方法进行了评价。
Coarse and fine aggregates generated from crushed concrete products for new concrete can be generally accepted only when the properties of recycled aggregate concrete, in addition to the relationships between different properties of such a concrete, are well understood. The results of an experimental investigation into the relationship of compressive strength to ultrasonic pulse velocity and to rebound number is presented in this paper. It has been observed that for the water-cured concrete the strength-pulse velocity relationship is influenced by the use of the recycled aggregate. For the same value of the pulse velocity, the strength of recycled aggregate concrete is higher than that for the natural aggregate concrete. On the other hand, the strength-rebound number relationship is not affected by the aggregate type used. The combined method of pulse velocity and rebound number for strength estimation is also evaluated.