品質管理・検査／評価・試験方法 (1)

[V-568] Evaluation method of revibration limit and material separation resistance about dam concrete

*荻野 正貴¹、小林 雅幸¹、原山 之克¹、黒羽 陽一郎¹ (1. 大成建設)

Keywords:Dam concrete, mortar, testing method, fresh properties, revibration limit, material segregation

We designed the evaluation method to measure the revibratable limit time and material separation resistance of dam concrete. Simple and quantitative evaluation was possible by using mortar. With regard to the revibratable limit time, it was possible to accurately evaluate the difference in the amount of the AE water reducing agent and the difference in the outside air temperature by this test method, and it was confirmed that it is useful for selecting concrete material composition. With regard to the resistance to material separation, only the ease of separation of the mixed water could be evaluated.