NC-P膨胀剂配制刚性防水混凝土的研究与工程应用

Research and Application of Rigid Waterproof Concrete with NC-P Expansive Agents

膨胀组份加入水泥中,可以生成体积增大的水化产物,这些水化产物能填充、堵塞硬化体的毛细孔、改变了孔结构和孔级配,提高了硬化体的密实度。宏观表现混凝土产生体积膨胀,约束条件下膨胀能转化成预压应力,可在混凝土中形成适宜的应力状态,使混凝土具有良好的抗裂性能和抗渗性能等。混凝土结构自防水的前提是控制有害裂缝,关键要解决钢筋混凝土硬化过程中的收缩变形。补偿收缩混凝土具有抗裂防渗的双重功能,这是其他外加剂防水混凝土所不具备的。配制结构自防水混凝土是混凝土膨胀剂的主要用途之一。本文介绍NC-P膨胀剂配制刚性防水混凝土的性能,并列举工程应用实例。

Shrinkage compensating concrete has dual functions of anti-crack &anti-leakage which not available with other waterproof concrete.Structure self-waterproof concrete batching is one of the leading purposes for expansive agents.This paper introduces the property of rigid waterproof concrete with NC-P expansive agents,some engineering applications are also presented.