纤维及憎水剂对超高强混凝土性能影响试验研究

Expermenteal Study on the Properties of Ultra-high Strength Concrete with Fiber and Hydrophobic Agent

为促进超高强混凝土在屋面防水工程中推广与应用,研究纤维及憎水剂对超高强混凝土力学性能和防水性能的影响规律。结果表明:纤维掺量与混凝土抗折强度成正比,纤维掺量为8 kg/m^(3)时,混凝土抗折强度与抗渗等级均达到最佳值;憎水剂掺量为与混凝土吸水率和抗折强度成反比,憎水剂掺量为6 kg/m^(3)时,超高强混凝土具有更优异的抗压强度及吸水率性能。

To promote the application of ultra-high-strength concrete(UHSC)in roofing waterproofing systems,the effects of fiber and water-repellent agent additions on the mechanical and waterproof properties of UHSC were investigated.The results indicate that the flexural strength of the concrete is positively correlated with fiber content,reaching optimal flexural strength and impermeability when the fiber dosage is 8 kg/m^(3).Conversely,the addition of the water-repellent agent is inversely correlated with both water absorption and flexural strength.At a dosage of 6 kg/m^(3),the UHSC exhibits superior compressive strength and water absorption properties.