Nanostructured Cement-Based Materials
Cement-based materials that have been suitably nanostructured by the use of admixtures are attractive for some structural and functional properties.The admixtures include silica fume(0.1-0.2 μm),carbon black(30 nm),carbon nanofiber(0.1 μm diameter)and water-soluble polymer(methylcellulose).Silica fume causes improvement in the vibration reduction ability(increasing both the damping capacity and the storage modulus),steel-cement shear bond strength,embedded steel corrosion resistance and carbon microfiber dispersion.Carbon nanofiber is superior to carbon microfiber in providing electromagnetic interference shielding,due to the skin effect.At the same content,both carbon nanofiber and carbon black are inferior to carbon microfiber in providing mechanical performance,electrical conductivity and electricalresistance-based strain sensing.However,carbon black lowers the cost and increases the maximum feasible content of conductive admixture,due to enhanced workability.At the same content,methylcellulose is more effective than latex particles in improving the steel-cement bond strength.
cement concrete nanostructure nanotechnology carbon fiber silica fume shielding
D.D.L. Chung Sihai Wen
Composite Materials Research Laboratory,University at Buffalo,State University of New York,Buffalo,NY 14260-4400,U.S.A.
国际会议
The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)
重庆·南京
英文
2007-05-01（万方平台首次上网日期，不代表论文的发表时间）