Investigation on Nano-Modified Phostocatalytic Ultra-Smooth Concrete

摘要

How far the concrete can be used as finishing material depends on how smooth and functional it can be. In this work an ultra smooth surfaced photocatalytic concrete is fabricated with a method taking use of the nano granular nature of the main hydration product of cement Calcium Silicate Hydrate (C-S-H) and the photocatalysis of nano TiO_2. The surface of this concrete is covered with nano particles of Calcium Silicate Hydrates (C-S-H) sized around several 10 nm when characterized by FSEM and AFM, the nano TiO_2 covers on the surface of the concrete also. The roughness of the concrete surface is arond 10 nm when quantified with AFM in a scanning area of 1.0×1.0μm~2, ultra smooth surfaced photocatalytic concrete can degrade MB blue obviously. Due to its ultra smooth and photocatalytic, this concrete is promising to be a new self cleaning finishing material for the modern building.