关键词: CNTs;水泥基;耐久性;力学性能

Abstract: In order to solve the problems of durability and mechanical properties of concrete materials in complex environment, a carbon nanotubes cement based composite was prepared by adding nano carbon material as the reinforcing component of cement based material and adding carbon nanotubes (CNTs). The mechanical properties and rheological properties of the cement matrix composite were studied .The durability of the cement matrix composite was evaluated by chloride penetration depth .The mechanical properties and durability of cement-based composites with different carbon nanotubes content were tested and analyzed, The microstructure of carbon nanotube cement matrix composites was analyzed by SEM (scanning electron microscope ).The results show that CNTs can significantly improve the mechanical properties and durability of cement-based materials, improve the pore structure of cement -based materials, and improve the resistance to chloride ion penetration of cement -based materials.

Key words: CNTs;cement-based;durability;mechanical property