【正文】 oncrete and the fibre reinforcement.B. Structural Composites Fireprotective glass is another application of nanotechnology. This is achieved by using a clear intumescent layer sandwiched between glass panels (an interlayer) formed of fumed silica (SiO2) nanoparticles which turns into a rigid and opaque fire shield when heated. Because of the hydrophobic properties of TiO2, it can be applied in antifogging coatings or in selfcleaning windows [1]. NanoTiO2 The bentonite (BT) and organically modified bentonite (OBT) were used to reinforce and modify asphalt binder by melt processing under sonication and shearing stresses. The BT modified asphalt possess intercalated structure while OBT modified asphalt possessed exfoliated structure. The BT and OBT modified asphalts have shown greater softening point, viscosity, higher plex modulus, lower phase angle and higher rutting parameter and better rheological properties than the base asphalt. But the ductility of the modified asphalts decreased with the addition of BT and OBT. They have significantly lower creep stiffness. Therefore, the low temperature cracking resistance was improved by addition ofBT and OBT. The OBT modified asphalts has better properties than the BT modified asphalts.E. Nanotechnology in Fire Protection Fire resistance of steel structures is often provided by a coating of spray on cementitious process which is no more popular because they need to be thick, tend to be brittle and polymer additions are needed to improve adhesion. However, research into nanocement (made of nanosized particles) has the potential to create a new paradigm in this area of application. This is achieved by the mixing of carbon nanotubes (CNT’s) with the cementious material to fabricate fibre posites that can inherit some of the outstanding properties of the nanotubes such as strength. Polypropylene fibres are also being considered as a method of increasing fire resistance and this is a cheaper option than conventional insulation. CNTs can also be used to produce protective clothing materials because of their flame retardant property. of Nanotechnology on Construction A. Merits at the nanoscale experiences a 500% increase in surface area and a 400% decrease in opacity. Current nanoTiO2 1) Because of their small particle size, nano particles have the potential to negatively affect the respiratory and digestive tracks and the skin or eye surface [3] thus exposes workers to hazards.2) Since nanotechnologyrelated industries are relatively new, the type of worker who is employed in construction research and development (or even some field applications) must have an interdisciplinary background.3) New policies in the context of nanotechnology will require cooperation between various levels of government, Ramp。emissions by nearly 25% in the production phaseA wall made of nanomodified concrete during a cold weather season could potentially be used as a thermal insulator when the outside temperature falls or used as a conductor when the ambient temperature inside the building is low, thereby reducing the energy load required for conditioning the building interior. With further development of LED amp。 however, this paper has demonstrated the main benefits and barriers that allow the effect of nanotechnology on construction to be defined. Recent years of Ramp。[1] Mann, S. (2006). “Nanotechnology and Construction,” Nanoforum Report. , May 30, 2008.[2] Balaguru, P. N., “Nanotechnology and Concrete: Background, Opportunities and Challenges.” Proceedings of the International Conference – Application of Technology in Concrete Design, Scotland, UK, , 2005.[3] Goddard III, ., Brenner, ., Lyshevski, . and Iafrate, . “Properties of HighVolume Fly Ash Concrete Incorporating NanoSiO2.” Cement and Concrete Research, , , 2004.[4] Beatty, C. (2006). “Nanomodification of asphalt to lower construction temperatures.” NSF Workshop on Nanotechnology, Material Science and Engineering, National Science Foundation, Washington, DC.[5] ASCE. (2005). “Report card for America’s infrastructure. American society of civil engineers” “”(Mar. 8, 2008).[6] Baer, D. R., Burrows, P. E., and ElAzab, A. A. (2003). “Enhancing coating functionality using nanoscience and nanotechnology.” Prog. Org. Coat., 47(3–4), 342–356.[7] Bartos, P. J. M. (2006). “NANOCONEX Roadmapnovel materials.” Centre for Nanomaterials Applications in Construction, Bilbao, Spain “” (Jan. 13, 2008).[8] Shah, S. P., and A. E. Naaman. “Mechanical Properties of Glass and Steel Fiber Reinforced Mortar.” ACI Journal 73, no. 1 (Jan 1976): 5053.[9] Saafi, M. and Romine, P. (2005).”Nano and Microtechnology.” Concrete International, Vol. 27 No. 12, p 2834.[10] Sobolev, K. and Gutierrez, M. F. (2005). “How Nanotechnology can Change the Concrete World,” American Ceramic Society Bulletin, vol. 84, no. 10, p. 1416.[11] Lau, KinTak, and David Hui. “The revolutionary creation of new advanced materials—carbon nanotube posites.” Composites: Part B 33, no. 4 (2002): 263277.19