自流平粉煤灰混凝土抗折强度试验研究

Investigation on the Test of Flexural Strength of Self-Compacting Fly-Ash Concrete

通过100 mm×100 mm×400 mm的自流平混凝土小梁抗折试验,探讨了粉煤灰置换率以及成型方式对自流平混凝土弯曲性能的影响,分析了粉煤灰对自流平混凝土抗折强度的影响机理.结果表明,自流平混凝土28d抗折强度整体上随着粉煤灰置换率的增加而降低;机械振捣不利于自流平混凝土的抗折强度.

Based on the test of flexural strength of self-compacting fly-ash concrete beam specimens with the size of 100 mm×100 mm×400 mm,how bending properties of self-compacting fly-ash concrete can be influenced by fly-ash replacement ratio and molding way has been studied.And influence mechanism of fly-ash on self-compacting concrete has been analyzed.The results show：Flexural strength of self-compacting concrete for 28 days decrease as fly-ash replacement ratio increase;Mechanical vibrating goes against flexural strength of self-compacting concrete.